Adsorbents for polyol purification

Details Adsorbents for polyol purification Adsorbents for polyol purification

1980-07-25

1981-10-20

Dees, Carl F.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252449, 252457, 423334, 423335, B01J 2010, B01J 2008, B01J 2004

Patent

active

042960002

ABSTRACT:
A new silica is formed by hydrothermally reacting an aqueous dispersion of silica and sodium hydroxide, under certain conditions, to form a partly polymerized silicate; spray drying the mixture to form spheres of polysilicate; reacting the spray dried polysilicate with sulfuric acid to form a synthetic silica; and then filtering, washing and drying the silica. This and other silicas having a BET surface area greater than 60 sq m/g, and oil absorption of 60-140 cc/100 g, and with at least 70% of the silica larger than 44 microns are useful as adsorbents in polyol purification.

REFERENCES:
patent: 1900859 (1933-03-01), Connolly et al.
patent: 2355388 (1944-08-01), Michael et al.
patent: 2726216 (1955-12-01), Kimberlin, Jr.
patent: 3095270 (1963-06-01), Kurach et al.
patent: 3879527 (1975-04-01), Bertorelli et al.
patent: 4230679 (1980-10-01), Mahler et al.

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