Title: Method for preparation of an improved K-A type zeolite and for separation by adsorption polar and non-polar molecules

Abstract: A novel type of zeolite is obtained by replacing ion-exchangeable active cations in A-type zeolite with potassium ions and divalent cations at 33.3 to 83.3% and 16.7 to 66.7%, respectively to combine into the total of 100%. This zeolite is effective for separation of a mixture consisting of non-polar molecules and polar molecules having the adsorption effective cross-section less than 5 A. For instance, monosilane and phosphine, both of which are adsorbed by the conventional Ca--A type zeolite, can be separated by the novel K--A type zeolite which adsorbs phosphine.

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Inventors: Yatsurugi, Yoshifumi (7-B, AN)
Kuratomi, Tatsuo (4-CHO, ME, US)
Takaishi, Tetsuo

Application Number: 467123
Filing Date: 1974-05-06
Publication_date: 1976-09-28
Assignee:
Primary Class(es): 95/116 95/117, 95/139, 95/144, 95/902
Other Classes:
US Patent Ref:

3785122

Jan, 1974

Vatsudual et al.

55/75.

Other Refs:
Primary Examiner: Adee, John
Assistant Examiner:
Attorney: Munz; Otto John