US PATENT SUBCLASS 528 / 500
.~.~.~ Steam stripping or steam distilling

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

Internet Version by PATENTEC © 1999      Terms of Use


528 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {23}
480  DF  .~ TREATING POLYMER CONTAINING MATERIAL OR TREATING A SOLID POLYMER OR A RESINIFIABLE INTERMEDIATE CONDENSATION PRODUCT {14}
499  DF  .~.~ Contacting with water {1}
500.~.~.~ Steam stripping or steam distilling

DEFINITION

Classification: 528/500

(under subclass 499) Process wherein the polymer or the polymer-containing material is separated by vaporizing and condensing at least a portion of the material, so as to isolate in the condensed liquid or in the unvaporized portion a comparatively pure compound, which compound was present in the original mixture and wherein the separation is effect by contacting the material to be separated with steam so as to reduce the partial vapor pressure of the component of the material desired to be recovered.

(1) Note. This subclass includes the addition of water which is converted to steam in the distillation device as well as the addition of steam to the distillation process.

SEE OR SEARCH CLASS

202, Distillation: Apparatus,

81+, for distillation apparatus utilized in steam stripping or distillation.

203, Distillation: Processes, Separatory,

95+, for separatory distillation processes including the addition of water or steam which are of general utility.