US PATENT SUBCLASS 208 / 94
.~.~.~ Plural stages of distillation

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


208 /   HD   MINERAL OILS: PROCESSES AND PRODUCTS

46  DF  CHEMICAL CONVERSION OF HYDROCARBONS {11}
85  DF  .~ With preliminary treatment of feed {4}
92  DF  .~.~ Distillation {2}
94.~.~.~ Plural stages of distillation

DEFINITION

Classification: 208/94

(under subclass 92) Processes wherein the mineral oil to be converted is subjected to two or more successive distillation stages prior to conversion.

SEE OR SEARCH THIS CLASS, SUBCLASS:

354+, and 364+, for processes of distilling mineral oils in

plural stages wherein there is no conversion of the oil.