Technique to reduce the zeolite molecular sieve solubility in an

Details Technique to reduce the zeolite molecular sieve solubility in an Technique to reduce the zeolite molecular sieve solubility in an

1980-12-18

1982-06-08

Cintins, Ivars C.

Sugar, starch, and carbohydrates

Processes

Carbohydrate manufacture and refining

210673, 210679, 210691, C13D 314

Patent

active

043337694

ABSTRACT:
An improved adsorbent comprising a crystalline aluminosilicate, method of manufacture of the adsorbent and improved process for separating a component from a feed mixture comprising an aqueous solution of a mixture of different components, such as a mixture of saccharides. In the process the mixture is contacted with the adsorbent, which selectively adsorbs a component from the feed mixture. The adsorbed component is then recovered by contacting the adsorbent with a desorbent material such as water to effect the desorption of the adsorbed component from the adsorbent. There is an undesirable tendency for the silicon constituent of the crystalline aluminosilicate to dissolve in the aqueous system. The improvement to the adsorbent and process comprises the coating of the adsorbent with ethylcellulose which substantially reduces the undesirable dissolution. The adsorbent is manufactured by mixing together the uncoated precursor of the adsorbent with the organic polymer dissolved in a liquid organic solvent, and removing the solvent.

REFERENCES:
patent: 4014711 (1977-03-01), Odawara et al.
patent: 4248737 (1981-02-01), Kulprathipanja

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