The Harshaw Chemical Company

Gerald Dennis Burt

Anton Mudrak

John Slocum Ashman

A method of preparing esters and salts of esters of pentavalent antimony from hydrated metal antimonates is disclosed. The method comprises heating a mixture of a hydrated metal antimonate and an organic compound selected from the group consisting of

Method of preparing salts of esters of pentavalent antimony

Finely divided particulate inorganic antimony compounds which are surface modified with an organic titanium compound having the formula

Titanate treated antimony compounds

Finely divided particulate inorganic antimony compounds which are surface-modified with an organic zirconate having the formula

Zirconate treated antimony compounds

Organic dyes or dye intermediates are crystallizable in an aqueous medium in the presence of finely divided, solid polytetrafluoroethylene (hereinafter referred to as 'PTFE') resin particles. Crystals of desirable, very small size are precipitated more quickly than with conventional seeding. This process is particularly useful for crystallizing disperse dyes of two types:

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Shaker Heights, OH, United States of America

Gerald Dennis Burt