US PATENT SUBCLASS 523 / 310
.~.~ Utilizing an ion exchanger or a solid sorptive material or semipermeable membrane

Current as of: June, 1999
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523 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {1}
1  DF  .~ PROCESSES OF PREPARING A DESIRED OR INTENTIONAL COMPOSITION OF AT LEAST ONE NONREACTANT MATERIAL AND AT LEAST ONE SOLID POLYMER OR SPECIFIED INTERMEDIATE CONDENSATION PRODUCT, OR PRODUCT THEREOF {71}
310.~.~ Utilizing an ion exchanger or a solid sorptive material or semipermeable membrane

DEFINITION

Classification: 523/310

Utilizing an ion exchanger or a solid sorptive material or semipermeable membrane:

(under subclass 1) Process of treating or forming an intentional or desired composition including a step of treating with an ion exchanger or solid sorptive material or semipermeable membrane.

(1) Note. Ion exchanger materials include, e.g., ion exchange organic polymers and other ion exchange materials such as synthetics and clays and modified clays.

(2) Note. The ion exchanger material must contain ionic groups exchangeable with other ionic groups.

(3) Note. Sorptive materials include molecular sieves such as zeolites which are a class of natural or manufactured hydrated silicates of aluminum and either sodium or calcium or both, of the type Na2O.Al2O3.nSiO2 - .xH2O, which will accept and retain molecules that are small and/or slender enough to pass through the pores, thus separating them from a mixture with larger or bulkier molecules.

(4) Note. When the ion exchanger material chemically reacts with the solid polymer or solid polymer-forming system, there must be other chemically inert ingredients ultimately present for the process to be classified herein.

SEE OR SEARCH CLASS

525, Synthetic Resins or Natural Rubbers, appropriate subclasses, for the reaction of an ion exchange material with a solid polymer or solid-polymer forming system when no NRM or DNRM is present.

528, Synthetic Resins or Natural Rubbers, 480+, for treatment of polymers with ion exchange or sorptive

material.

585, Chemistry of Hydrocarbon Compounds,

820, for purification of hydrocarbon liquids by sorption; and subclass 833 for purification by ion exchange.