US Patent Class 208
MINERAL OILS: PROCESSES AND PRODUCTS
 Electronic File Wrappers |  Electronic Patent Documents |  Paper Patent Documents | Current as of: June, 1999
|  and Services |
| Electronic File Wrappers | Electronic Patent Documents | Paper Patent Documents | Current as of: June, 1999
| and Services |
| DF | CLASS NOTES | |
| 1 | DF | SYNTHETIC DRYING OILS |
| 2 | DF | PHENOLIC OR TOXIC OILS |
| 3 | DF | OXIDATION OF MINERAL OILS |
| 4 | DF | .~ To form asphalts, tars or pitches |
| 5 | DF | .~.~ In presence of soild contact material |
| 6 | DF | .~.~ Tar, pitch, or asphalt feed |
| 7 | DF | .~ With cracking |
| 390 | DF | TAR SAND TREATMENT WITH LIQUID |
| 391 | DF | .~ Inorganic (only) liquid |
| 400 | DF | BY TREATMENT OF SOLID MINERAL, E.G., COAL LIQUEFACTION, ETC. |
| 401 | DF | .~ Including a test or measurement |
| 402 | DF | .~ Using electrical, magnetic or wave energy |
| 403 | DF | .~ Chemical modification of solids before hydrogenation |
| 404 | DF | .~ Using molten additive, e.g., heat carrier, etc. |
| 405 | DF | .~.~ Molten catalyst |
| 406 | DF | .~.~.~ Halide-containing |
| 407 | DF | .~ Specified agitation or circulation in gas contact zone |
| 408 | DF | .~.~ Gas includes hydrogen |
| 409 | DF | .~.~ Vertical gas upflow, e.g., fluidization, etc. |
| 410 | DF | .~.~.~ Using solid heat carrier |
| 411 | DF | .~.~ Using solid heat carrier |
| 412 | DF | .~ Plural hydrogenation steps |
| 413 | DF | .~.~ Solid catalyst in at least one step |
| 414 | DF | .~ With hydrogen production from water |
| 415 | DF | .~ Including contact of feed with liquid produced in the process, i.e., recycle |
| 416 | DF | .~.~ With discrete hydrogenation of recycle stream |
| 417 | DF | .~.~ Recycle of bottoms (resid) |
| 418 | DF | .~.~ Including contact with hydrogen gas |
| 419 | DF | .~ Using specifically added catalyst during hydrogenation |
| 420 | DF | .~.~ Dissolved or suspended-thermally-decomposable catalyst, component or precursor |
| 421 | DF | .~.~ Containing Group VI transition metal |
| 422 | DF | .~.~.~ And Group VIII metal |
| 423 | DF | .~.~ Containing Group VIII metal |
| 424 | DF | .~ Specified procedure to improve separation of solids from liquid product |
| 425 | DF | .~.~ Including centrifugation, filtering, flotation or vibration |
| 426 | DF | .~ Including agglomeration, comminution or size-classification of solids |
| 427 | DF | .~ Including burning of feed or product |
| 428 | DF | .~ Including contact with extraneous additive other than hydrogen, e.g., solvent, etc. |
| 429 | DF | .~.~ Distinct addition zones |
| 430 | DF | .~.~ Contact with additive, followed by chemical conversion |
| 431 | DF | .~.~ Specified hydrogen-donor solvent |
| 432 | DF | .~.~ With specified circulation procedure in contact zone |
| 433 | DF | .~.~ Simultaneous treatment with gaseous additive and liquid solvent |
| 434 | DF | .~.~ Additive is petroleum or fraction from petroleum refining |
| 435 | DF | .~.~ Additive is specified catalyst or liquid solvent or dispersant |
| 12 | DF | COLORNG TREATMENTS (INCLUDES FLUORESCENCE) |
| 13 | DF | TREATMENT OF REFINING SLUDGE |
| 14 | DF | PRODUCTS AND COMPOSITIONS |
| 15 | DF | .~ Fuels |
| 16 | DF | .~.~ Gasolines |
| 17 | DF | .~.~.~ Admixtures |
| 18 | DF | .~ Lubricating oils |
| 19 | DF | .~.~ Admixtures |
| 20 | DF | .~ Waxes |
| 21 | DF | .~.~ Admixtures |
| 22 | DF | .~ Asphalts, tars, pitches and resins |
| 23 | DF | .~.~ Admixtures |
| 24 | DF | PARAFFIN WAX; TREATMENT OR RECOVERY |
| 25 | DF | .~ With ureas |
| 26 | DF | .~ With sorption agents |
| 27 | DF | .~ Chemical treatment (refining or modification except mere solvent extraction) |
| 28 | DF | .~ Separation of paraffin from oil (e.g., dewaxing) |
| 29 | DF | .~.~ Emulsion dewaxing |
| 30 | DF | .~.~ Separation of residual oil from wax (i.e., deoiling) |
| 31 | DF | .~.~.~ With solvent |
| 32 | DF | .~.~.~ Sweating |
| 33 | DF | .~.~ Solvent dewaxing |
| 34 | DF | .~.~.~ With deasphalting treatment |
| 35 | DF | .~.~.~ With chilling by evaporation of solvent |
| 36 | DF | .~.~.~ With nondewaxing solvent extraction of oil |
| 37 | DF | .~.~ Chilling |
| 38 | DF | .~.~.~ With filtering |
| 39 | DF | ASPHALTS, TARS, PITCHES AND RESINS; MAKING, TREATING AND RECOVERY |
| 40 | DF | .~ By chemical conversion of oil |
| 41 | DF | .~ By distillation |
| 42 | DF | .~.~ Tar feed |
| 43 | DF | .~.~.~ By contact with hot gases |
| 44 | DF | .~ Chemical modification of asphalt, tar, pitch or resin |
| 45 | DF | .~ Solvent extraction |
| 46 | DF | CHEMICAL CONVERSION OF HYDROCARBONS |
| 47 | DF | .~ With prevention of corrosion or erosion in system |
| 48 R | DF | .~ With prevention or removal of deleterious carbon accumulations or equipment |
| 48 Q | DF | .~.~ Quench |
| 48 AA | DF | .~.~ Antifoulant additive |
| 49 | DF | .~ Plural serial stages of chemical conversion |
| 50 | DF | .~.~ Coking in at least one stage |
| 51 | DF | .~.~.~ With reforming |
| 52 R | DF | .~.~.~ With both catalytic and thermal cracking |
| 52 CT | DF | .~.~.~.~ Catalyst treatment to remove metal contaminants |
| 53 | DF | .~.~.~ First stage is coking |
| 54 | DF | .~.~.~.~ Second stage is cracking |
| 55 | DF | .~.~.~.~.~ Catalytic cracking |
| 56 | DF | .~.~ Hydrogen donor diluent cyclic processes |
| 57 | DF | .~.~ First stage is an hydrogenation (saturation) |
| 58 | DF | .~.~ First stage is hydrocracking (includes hydro-desulfurization under cracking conditions) |
| 59 | DF | .~.~.~ Hydrocracking in all stages |
| 60 | DF | .~.~.~ With subsequent reforming |
| 61 | DF | .~.~.~ With subsequent thermal or catalytic cracking |
| 62 | DF | .~.~ First stage is reforming |
| 63 | DF | .~.~.~ Reforming in all stages |
| 64 | DF | .~.~.~.~ Catalyst in at least one stage |
| 65 | DF | .~.~.~.~.~ Noble metal containing catalyst |
| 66 | DF | .~.~.~ Catalytic |
| 67 | DF | .~.~ First stage is thermal or catalytic cracking |
| 68 | DF | .~.~.~ With subsequent hydrocracking |
| 69 | DF | .~.~.~ With subsequent reforming |
| 70 | DF | .~.~.~.~ Catalytic reforming |
| 71 | DF | .~.~.~ With subsequent polymerization |
| 72 | DF | .~.~.~ Cracking in all stages |
| 73 | DF | .~.~.~.~ Catalyst in at least one stage |
| 74 | DF | .~.~.~.~.~ Catalyst in multiple stages |
| 75 | DF | .~.~.~.~ With cracking of total product from first stage |
| 76 | DF | .~.~.~.~ With cracking of the first stage bottoms |
| 77 | DF | .~.~.~.~ With cracking of the first stage intermediate fraction |
| 78 | DF | .~ Plural parallel stages of chemical conversion |
| 79 | DF | .~.~ At least one stage is reforming |
| 80 | DF | .~.~ Split feed |
| 81 | DF | .~ With contacting vapor porducts with liquid feed (i.e., product scrubbing and feed stripping) |
| 82 | DF | .~.~ Only selected fractions of product or feed are contacted |
| 83 | DF | .~.~ With subsequent fractionation |
| 84 | DF | .~.~ With added material (to scrubbing-stripping stage) |
| 85 | DF | .~ With preliminary treatment of feed |
| 86 | DF | .~.~ Deasphalting |
| 87 | DF | .~.~ Solvent extraction |
| 88 | DF | .~.~ Refining |
| 89 | DF | .~.~.~ With hydrogen |
| 90 | DF | .~.~.~ With acids |
| 91 | DF | .~.~.~ With solid absorbents |
| 92 | DF | .~.~ Distillation |
| 93 | DF | .~.~.~ With blending of products of distillation with each other or with converted products |
| 94 | DF | .~.~.~ Plural stages of distillation |
| 95 | DF | .~ With subsequent treatment of products |
| 96 | DF | .~.~ Solvent extraction |
| 97 | DF | .~.~ Refining |
| 98 | DF | .~.~.~ With acids |
| 99 | DF | .~.~.~ With solid adsorbents |
| 100 | DF | .~.~ Separation of vapors and liquid products |
| 101 | DF | .~.~.~ With absorption with liquid |
| 102 | DF | .~.~.~ With additional separation of liquid products from primary separation zone |
| 103 | DF | .~.~.~ With additional separation of vapor products |
| 104 | DF | .~.~.~.~ With distillation of second stage liquid |
| 105 | DF | .~.~.~.~ With condensation of second stage vapors |
| 106 | DF | .~ Cracking |
| 107 | DF | .~.~ Hydrogenative |
| 108 | DF | .~.~.~ Catalytic |
| 109 | DF | .~.~.~.~ Silica or silicate containing catalyst |
| 110 | DF | .~.~.~.~.~ With metal or metal oxide |
| 111.01 | DF | .~.~.~.~.~.~ With group III metal, rare earth metal, or metal oxide (i.e., Sc, Y, Al, Ga, ln, Tl, metal of atomic number 57-71, or oxide thereof) |
| 111.05 | DF | .~.~.~.~.~.~.~ With group VII metal or metal oxide (i.e., Mn, Tc, Re, or oxide thereof) |
| 111.1 | DF | .~.~.~.~.~.~.~ With group IV metal or metal oxide (i.e., Ti, Zr, Hf, Ge, Sn, Pb, or oxide thereof) |
| 111.15 | DF | .~.~.~.~.~.~.~ With group I metal or metal oxide (i.e., alkali metal, Ag, Au, Cu, or oxide thereof) |
| 111.2 | DF | .~.~.~.~.~.~.~ With group V metal or metal oxide (i.e., V, Nb, Ta, As, Sb, Bi, or oxide thereof) |
| 111.25 | DF | .~.~.~.~.~.~.~ With group II metal or metal oxide (i.e., alkaline earth metal, Be, Mg, Zn, Cd, Hg, or oxide thereof) |
| 111.3 | DF | .~.~.~.~.~.~.~ With group VI metal or metal oxide (i.e., Cr, Mo, W, Po, or oxide thereof) |
| 111.35 | DF | .~.~.~.~.~.~.~ With group VIII metal or metal oxide (i.e., iron, or platinum group metal, or oxide thereof) |
| 112 | DF | .~.~.~.~ Metal or metal oxide catalyst |
| 113 | DF | .~.~ Catalytic |
| 114 | DF | .~.~.~ Phosphorus, boron or nitrogen containing catalyst |
| 115 | DF | .~.~.~ Halogen containing catalyst |
| 116 | DF | .~.~.~.~ Metal halide |
| 117 | DF | .~.~.~.~.~ Group III metal halide |
| 118 | DF | .~.~.~ Silica or silicate containing catalyst |
| 119 | DF | .~.~.~.~ With metal or metal oxide |
| 120.01 | DF | .~.~.~.~.~ With group III metal, rare earth metal, or metal oxide (i.e., Sc, Y, Al, Ga, In, Tl, metal of atomic number 57-71 or oxide thereof) |
| 120.05 | DF | .~.~.~.~.~.~ With group VII metal or metal oxide (i.e., Mn, Tc, Re, or oxide thereof) |
| 120.1 | DF | .~.~.~.~.~.~ With group IV metal or metal oxide (i.e., Ti, Zr, Hf, Ge, Sn, Pb, or oxide thereof) |
| 120.15 | DF | .~.~.~.~.~.~ With group I metal or metal oxide (i.e., alkali metal, Ag, Au, Cu, or oxide thereof) |
| 120.2 | DF | .~.~.~.~.~.~ With group V metal or metal oxide (i.e., V, Nb, Ta, As, Sb, Bi, or oxide thereof) |
| 120.25 | DF | .~.~.~.~.~.~ With group II metal or metal oxide (i.e., alkaline earth metal, Be, Mg, Zn, Cd, Hg, or oxide thereof) |
| 120.3 | DF | .~.~.~.~.~.~ With group VI metal or metal oxide (i.e., Cr, Mo, W, Po, or oxide thereof) |
| 120.35 | DF | .~.~.~.~.~.~ With group VIII metal or metal oxide (i.e., iron or platinum group metal, or oxide thereof) |
| 121 | DF | .~.~.~ Metal or metal oxide containing catalyst |
| 122 | DF | .~.~.~.~ Group III metal or oxide |
| 123 | DF | .~.~.~.~.~ With Group VI metal or oxide |
| 124 | DF | .~.~.~.~.~ With Group VIII metal or oxide |
| 125 | DF | .~.~ With nonreactive material |
| 126 | DF | .~.~.~ Solids |
| 127 | DF | .~.~.~.~ Suspension system |
| 128 | DF | .~.~.~ Vapors |
| 129 | DF | .~.~.~.~ Combustion gases |
| 130 | DF | .~.~.~.~ Steam |
| 131 | DF | .~.~ Soaking |
| 132 | DF | .~.~ With heating in tubular confined stream |
| 133 | DF | .~ Reforming (includes dehydrogenation, isomerization, cyclization, aromatization, alkylation, dealkylation reactions) |
| 134 | DF | .~.~ Catalytic |
| 135 | DF | .~.~.~ With Group III metal or metal oxide containing catalyst |
| 136 | DF | .~.~.~.~ With Group VI metal or metal oxide |
| 137 | DF | .~.~.~.~ With Group VIII metal or metal oxide |
| 138 | DF | .~.~.~.~.~ Noble metal or oxide thereof |
| 139 | DF | .~.~.~.~.~.~ With halogen containing additive |
| 140 | DF | .~.~.~.~.~.~ With recovery or reactivation of catalyst |
| 141 | DF | .~.~.~ Feed of specific composition |
| 142 | DF | .~ Hydrogenation (saturation) |
| 143 | DF | .~.~ Catalytic |
| 144 | DF | .~.~.~ Feed of specific composition |
| 145 | DF | .~.~.~.~ With added source of hydrogen (includes hydrogen donor) |
| 146 | DF | .~ Solids contacting and mixing |
| 147 | DF | .~.~ Separate contiguous, dissimilar function, contacting zones |
| 148 | DF | .~.~ Combined gravitating bed and suspension zones |
| 149 | DF | .~.~ Solids of dissimilar composition |
| 150 | DF | .~.~ Purging |
| 151 | DF | .~.~.~ Plural stages |
| 152 | DF | .~.~ Solids replenishment, or selective discard |
| 153 | DF | .~.~ Suspension system |
| 154 | DF | .~.~.~ Start-up and shut down procedures |
| 155 | DF | .~.~.~ Plural zones of similar function |
| 156 | DF | .~.~.~.~ Solids and contacting fluids are both in series |
| 157 | DF | .~.~.~ Liquid feed |
| 158 | DF | .~.~.~ With augmented turbulence (in addition to normal mixing in bed) |
| 159 | DF | .~.~.~ With temperature regulation |
| 160 | DF | .~.~.~.~ By solids circulation to external heat exchange and return to same zone |
| 161 | DF | .~.~.~ Separation of entrained fines from effluents |
| 162 | DF | .~.~.~.~ In presence of a liquid |
| 163 | DF | .~.~.~ Fluidized dense bed |
| 164 | DF | .~.~.~.~ Solids transferring |
| 165 | DF | .~.~ Gravitating compact beds |
| 166 | DF | .~.~.~ Liquid feeding |
| 167 | DF | .~.~.~.~ Solids curtain type |
| 168 | DF | .~.~.~ Solids-vapor disengagement |
| 169 | DF | .~.~.~ Plural zones of similar function (same chamber) |
| 170 | DF | .~.~.~ Size stratification prevention |
| 171 | DF | .~.~.~ Uniform solids withdrawal |
| 172 | DF | .~.~.~ Preheating or quenching with solids |
| 173 | DF | .~.~.~ Solids transferring |
| 174 | DF | .~.~.~.~ By pneumatic lifting |
| 175 | DF | .~.~.~.~.~ Compact type |
| 176 | DF | .~.~ Solids moving processes |
| 177 | DF | REFINING |
| 178 | DF | .~ With reagent feed control |
| 179 | DF | .~ Purifying used oil |
| 180 | DF | .~.~ With added organic material |
| 181 | DF | .~.~ Plural treating agents (sequential or simultaneous) |
| 182 | DF | .~.~.~ One is a solid contact material |
| 183 | DF | .~.~.~.~ With acid or alkali |
| 184 | DF | .~.~ Distillation or degassing |
| 185 | DF | .~.~.~ With gaseous treating agent |
| 186 | DF | .~.~.~ With solid-liquid separation |
| 187 | DF | .~ Water removal (dehydration) |
| 188 | DF | .~.~ With treating agent |
| 189 | DF | .~ Sweetening |
| 190 | DF | .~.~ With hypochlorites |
| 191 | DF | .~.~ With copper compounds |
| 192 | DF | .~.~.~ With preliminary treatment of oil |
| 193 | DF | .~.~.~ With subsequent treatment of the sweet oil |
| 194 | DF | .~.~.~.~ Separation or recovery of copper compound |
| 195 | DF | .~.~.~ Copper chloride and free oxygen containing gas |
| 196 | DF | .~.~ With peroxides |
| 197 | DF | .~.~ With lead compounds |
| 198 | DF | .~.~.~ Lead sulfide |
| 199 | DF | .~.~.~ Sodium plumbite |
| 200 | DF | .~.~.~.~ With preliminary treatment of the oil |
| 201 | DF | .~.~.~.~ With subsequent treatment of the sweet oil |
| 202 | DF | .~.~.~.~.~ Organic treating agent |
| 203 | DF | .~.~ With alkali metal hydroxide or carbonate |
| 204 | DF | .~.~.~ With added oxygen containing organic compound |
| 205 | DF | .~.~.~.~ Acyclic alcohol |
| 206 | DF | .~.~.~ With added nitrogen containing compound |
| 207 | DF | .~.~ Nitrogen containing compound |
| 208 R | DF | .~ Sulfur removal (free or combined sulfur) |
| 209 | DF | .~.~ With hydrogen |
| 210 | DF | .~.~.~ Plural stage treatments with hydrogen |
| 211 | DF | .~.~.~ With preliminary treatment of feed |
| 212 | DF | .~.~.~ With subsequent treatment of product |
| 213 | DF | .~.~.~ With solid catalyst or absorbent |
| 214 | DF | .~.~.~.~ With hydrogen yielding material (H donor) |
| 215 | DF | .~.~.~.~ With heavy metal sulfide |
| 216 R | DF | .~.~.~.~ With group VI metal or compound |
| 216 PP | DF | .~.~.~.~.~ With specific porosity or pore volume |
| 217 | DF | .~.~.~.~ With Group VIII metal or compound |
| 218 | DF | .~.~ Split treatment |
| 219 | DF | .~.~ With acids |
| 220 | DF | .~.~.~ Plural stages of sulfur removal |
| 221 | DF | .~.~.~ With preliminary treatment of feed |
| 222 | DF | .~.~.~ With subsequent treatment of product |
| 223 | DF | .~.~.~ Inorganic acid |
| 224 | DF | .~.~.~.~ Sulfuric acid |
| 225 | DF | .~.~.~.~ Hydrochloric acid |
| 226 | DF | .~.~ With alkali or alkali earth metal compound (except clays) |
| 227 | DF | .~.~.~ Plural stages of sulfur removal |
| 228 | DF | .~.~.~ With preliminary treatment of feed |
| 229 | DF | .~.~.~ With subsequent treatment of product |
| 230 | DF | .~.~.~ Alkali metal compound |
| 231 | DF | .~.~.~.~ With added oxygen containing organic compound |
| 232 | DF | .~.~.~.~.~ Alcohol containing |
| 233 | DF | .~.~.~.~.~.~ With other organic compound |
| 234 | DF | .~.~.~.~.~ With regeneration of treating agent |
| 235 | DF | .~.~.~.~ With regeneration of treating agent |
| 236 | DF | .~.~ With nitrogen containing treating reagent |
| 237 | DF | .~.~ With organic reagent |
| 238 | DF | .~.~.~ Hydrocarbon containing |
| 239 | DF | .~.~.~ Heavy metal soap containing |
| 240 | DF | .~.~.~ Oxygen containing |
| 241 | DF | .~.~ With free halogen or nonmetal halide containing reagent |
| 242 | DF | .~.~ With sulfur oxides |
| 243 | DF | .~.~ With Group VI metal or compound |
| 244 | DF | .~.~ With Group VIII metal or compound |
| 245 | DF | .~.~ With silicon or compound thereof |
| 246 | DF | .~.~ With Group IB metal or compound |
| 247 | DF | .~.~ With Group IIB metal or compound |
| 248 | DF | .~.~ With Group III metal or compound |
| 249 | DF | .~.~ With Group IV, V, VII metal or compound |
| 250 | DF | .~.~ Solids contacting and mixing |
| 208 M | DF | .~.~ Using free alkali metal |
| 251 R | DF | .~ Metal contaminant removal |
| 252 | DF | .~.~ With acid |
| 253 | DF | .~.~ With metal or metal compound |
| 251 H | DF | .~.~ Employing hydrogen |
| 254 R | DF | .~ Nitrogen contaminant removal |
| 254 H | DF | .~.~ Employing hydrogen |
| 255 | DF | .~ Gum or gum former removal |
| 256 | DF | .~.~ With acid |
| 257 | DF | .~.~ With metal or metal compound |
| 258 | DF | .~.~.~ Alkali metal |
| 259 | DF | .~.~.~ Alkali or alkali earth metal compound (except clays) |
| 260 | DF | .~.~.~ Clay type or alumina |
| 261 | DF | .~.~.~.~ Vapor phase treatment |
| 262.1 | DF | .~ Halogen contaminant removal |
| 262.5 | DF | .~.~ Polychorinated biphenyl (PCB) |
| 263 | DF | .~ Organic acid or phenol contaminant removal |
| 264 | DF | .~ With hydrogen |
| 265 | DF | .~ With acids |
| 266 | DF | .~.~ Sulfuric acid |
| 267 | DF | .~.~.~ With fluid rotation or agitation |
| 268 | DF | .~.~.~ White oil making |
| 269 | DF | .~.~.~ Split treatment |
| 270 | DF | .~.~.~ Plural stages of acid treatment |
| 271 | DF | .~.~.~ With preliminary treatment of the oil |
| 272 | DF | .~.~.~.~ Fractionation |
| 273 | DF | .~.~.~ With subsequent treatment of the oil |
| 274 | DF | .~.~.~.~ Organic treating agent |
| 275 | DF | .~.~.~.~ Solid absorbent |
| 276 | DF | .~.~.~ With nonwater additive |
| 277 | DF | .~.~.~.~ Organic compound |
| 278 | DF | .~.~.~.~ Solid contact material |
| 279 | DF | .~.~ Phosphorus containing acid |
| 280 | DF | .~.~ Halogen containing acid |
| 281 | DF | .~.~.~ Hydrochloric acid |
| 282 | DF | .~.~ Organic acid |
| 283 | DF | .~ With alkali or alkali earth metal compound (except clays) |
| 284 | DF | .~.~ Alkali metal compound |
| 285 | DF | .~.~.~ With preliminary treatment of the oil |
| 286 | DF | .~.~.~ With subsequent treatment of the oil |
| 287 | DF | .~.~.~ With solid carrier |
| 288 | DF | .~.~.~ With added material |
| 289 | DF | .~ With nitrogen containing compound |
| 290 | DF | .~ With organic compound |
| 291 | DF | .~.~ Oxygen containing |
| 292 | DF | .~ With boron, phosphorus, arsenic, antimony or bismuth containing treating agent |
| 293 | DF | .~ With sulfur containing treating agent |
| 294 | DF | .~ With free metal |
| 295 | DF | .~ With Group IV, V, VI, VII or VIII metal compound |
| 296 | DF | .~ With Group IB or IIB metal compound |
| 297 | DF | .~ With Group III metal compound (except clays) |
| 298 | DF | .~ With liquid treating agent (includes slurries of solids) |
| 299 | DF | .~ With solid catalyst or absorbent |
| 300 | DF | .~.~ Of particular physical shape or structure |
| 301 | DF | .~.~ With preliminary treatment of the oil |
| 302 | DF | .~.~ With subsequent treatment of the oil |
| 303 | DF | .~.~ Plural treating stages |
| 304 | DF | .~.~ Processes including downward movement of particles |
| 305 | DF | .~.~ Solids rehabilitation |
| 306 | DF | .~.~ Composite or plural treating agents |
| 307 | DF | .~.~ Silicon or carbon containing treating agent |
| 308 | DF | FRACTIONATION |
| 309 | DF | .~ Deasphalting |
| 310 R | DF | .~ Adsorption |
| 310 Z | DF | .~.~ Zeolite adsorbent |
| 311 | DF | .~ Liquid extraction with solvents |
| 312 | DF | .~.~ With blending of separated fractions with each other or with feed |
| 313 | DF | .~.~ Extractive distillation |
| 314 | DF | .~.~ Plural stages with different oil miscible solvents |
| 315 | DF | .~.~.~ With recycle of product of later extraction to earlier extraction stage |
| 316 | DF | .~.~.~ Difference is mere change in proportions of solvents |
| 317 | DF | .~.~ Counter current multistage extraction |
| 318 | DF | .~.~ With recycle of oil |
| 319 | DF | .~.~ With pressure variation |
| 320 | DF | .~.~ With temperature gradient in extraction zone or between extraction zones |
| 321 | DF | .~.~ With solvent rehabilitation |
| 322 | DF | .~.~ Organic solvent containing |
| 323 | DF | .~.~.~ With added solvent or solvent modifier |
| 324 | DF | .~.~.~.~ Inorganic |
| 325 | DF | .~.~.~ Heterocyclic |
| 326 | DF | .~.~.~.~ Hetero-N-containing |
| 327 | DF | .~.~.~.~ Furfural and derivatives |
| 328 | DF | .~.~.~ Nonoxo carbonylic |
| 329 | DF | .~.~.~.~ Carboxylic esters |
| 330 | DF | .~.~.~ Nitrogen-containing solvent |
| 331 | DF | .~.~.~.~ Amino compound |
| 332 | DF | .~.~.~ Oxo compound containing |
| 333 | DF | .~.~.~ Oxy compound |
| 334 | DF | .~.~.~.~ Ethers |
| 335 | DF | .~.~.~.~ Aromatic |
| 336 | DF | .~.~.~ Halogen containing |
| 337 | DF | .~.~.~ Hydrocarbon |
| 338 | DF | .~.~ Liquid sulfur dioxide |
| 339 | DF | .~.~ Liquid-liquid contacting |
| 340 | DF | .~ Recovery of mineral oil from natural or converted gases |
| 341 | DF | .~.~ By absorption and vaporization |
| 342 | DF | .~.~.~ With fractional condensation prior to absorption |
| 343 | DF | .~.~.~ Indirect heat exchange between lean and rich absorbent |
| 344 | DF | .~.~.~ Plural absorption stages |
| 345 | DF | .~.~.~.~ At least one stage is under pressure |
| 346 | DF | .~.~.~ Absorption stage is under pressure |
| 347 | DF | .~ Distillation |
| 348 | DF | .~.~ With nonvapor compound added prior to or during vaporization |
| 349 | DF | .~.~ With nonvaporization treatment of liquid condensate or residue |
| 350 | DF | .~.~ Rectification |
| 351 | DF | .~.~.~ C1-C4 alkane removal |
| 352 | DF | .~.~.~ Flash vaporizaton |
| 353 | DF | .~.~.~ With heat recovery by indirect heat exchange |
| 354 | DF | .~.~.~ Plural or combined with additional distillation |
| 355 | DF | .~.~.~.~ With product recycle between distillation zones |
| 356 | DF | .~.~.~ With added gas or vapor (e.g., steam) |
| 357 | DF | .~.~.~ Vacuum or pressure |
| 358 | DF | .~.~.~ With liquid product recycle to rectification zone |
| 359 | DF | .~.~ Spraying |
| 360 | DF | .~.~ Filming |
| 361 | DF | .~.~ Flash vaporization |
| 362 | DF | .~.~ With added gas or vapor |
| 363 | DF | .~.~.~ Steam |
| 364 | DF | .~.~ Plural stages of vaporization |
| 365 | DF | .~.~.~ With heat recovery by indirect heat exchange |
| 366 | DF | .~.~ Vacuum or pressure |
| 367 | DF | .~.~ With agitation of distilland |
| 368 | DF | .~.~ Condensatin by direct heat exchange |
| 369 | DF | .~.~ Volatile treatment other than condensation |
| 370 | DF | MISCELLANEOUS |
| ****************************** | ||
| CROSS-REFERENCE ART COLLECTIONS | ||
| ****************************** | ||
| 950 | DF | PROCESSING OF "FISCHER-TROPSCH" CRUDE |
| 951 | DF | SOLID FEED TREATMENT WITH A GAS OTHER THAN AIR, HYDROGEN OR STEAM |
| 952 | DF | SOLID FEED TREATMENT UNDER SUPERCRITICAL CONDITIONS |
| ****************************** | ||
| DIGESTS | ||
| ****************************** | ||
| DIG 1 | DD | Automatic control |
| DIG 2 | DD | Molecular sieve |