Catalyst – solid sorbent – or support therefor: product or process – Zeolite or clay – including gallium analogs – And additional al or si containing component
Patent
1994-04-29
1996-05-07
Straub, Gary P.
Catalyst, solid sorbent, or support therefor: product or process
Zeolite or clay, including gallium analogs
And additional al or si containing component
B01J 2906
Patent
active
055146333
ABSTRACT:
A method for the production of a desiccant for HFC-32, HFC-152a and blended refrigerants containing HFC-32 and/or HFC-152a comprises immersing formed articles of 3A type zeolite having 20 to 60% in ion equivalent weight of its sodium ions exchanged for potassium ions in an aqueous solution of at least one member selected from the group consisting of sodium silicate and potassium silicate, thereby effecting deposition of SiO.sub.2 on the formed articles, removing the SiO.sub.2 -deposited formed articles from the aqueous solution, dehydrating the wet formed articles and subsequently activating the dehydrated formed articles. Also provided is a desiccant for HFC-32, HFC-152a and blended refrigerants containing HFC-32 and/or HFC-152a produced by this method.
REFERENCES:
patent: 2882243 (1959-04-01), Milton
patent: 3624003 (1971-11-01), Conde et al.
patent: 3679604 (1972-07-01), Lee et al.
patent: 4604372 (1986-08-01), Morishita et al.
Abe Masayuki
Adachi Shigeru
Hashimoto Masayuki
Noguchi Yoshitaka
Takashima Sueo
Dunn Jr. Thomas G.
Straub Gary P.
Union Showa K.K.
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