US PATENT SUBCLASS 554 / 177
.~.~.~ Recovering from industrial waste materials (e.g., foots, textile treating liquors, spent sorbents, filter cake, sewage, sludge, soapstock, etc.)

Current as of: June, 1999
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554 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
1  DF  .~ Fatty compounds having an acid moiety which contains the carbonyl of a carboxylic acid, salt, ester, or amide group bonded directly to one end of an acyclic chain of at least seven (7) uninterrupted carbons, wherein any additional carbonyl in the acid moiety is (1) part of an aldehyde or ketone group, (2) bonded directly to a noncarbon atom which is between the additional carbonyl and the chain, or (3) attached indirectly to the chain via ionic bonding {23}
175  DF  .~.~ Purification, recovery, deodorizing, decolorizing or color stabilizing {14}
177.~.~.~ Recovering from industrial waste materials (e.g., foots, textile treating liquors, spent sorbents, filter cake, sewage, sludge, soapstock, etc.) {3}
178  DF  .~.~.~.~> Metal oxide, hydroxide, carbonate, or bicarbonate treating agent
179  DF  .~.~.~.~> Organic or inorganic acid or anhydride treating agent (e.g., carbon dioxide, sulfur dioxide, etc.)
180  DF  .~.~.~.~> Hydrocarbon or halohydrocarbon treating agent

DEFINITION

Classification: 554/177

(under subclass 175) Processes wherein waste materials, such

as foots, textile treating liquors, spent absorbents, filter cake, sewage, sludge, soapstock, or other industrial wastes are utilized as the source material.

SEE OR SEARCH THIS CLASS, SUBCLASS:

8, for the extraction of fatty compounds from garbage, fish offal, or slaughter-houses wastes.

SEE OR SEARCH CLASS

502, Catalyst, Solid Sorbent, or Support Therefor: Product or Process of Making,

20+, for processes directed to the recovery of spent sorbents.