Pennwalt Corporation

Charles B Lindahl

James P King

Ronald E Davis

William V Hanks

Dayaldas T Meshri

Tariq Mahmood

Anhydrous ferric fluoride of 99.0% purity or greater, based upon F.sup.- analysis is afforded, as well as a process for its manufacture using anhydrous FeCl.sub.3 and liquid anhydrous HF, reacted in the substantial absence of O.sub.2, H.sub.2 O, or an oxidizing agent.

High purity anhydrous FeF.sub.3 and process for its manufacture

Method of preparing SbSbS.sub.4 product having a low level of free sulfur impurity, which includes mixing aqueous solutions of an alkali metal thioantimonate and a halide stabilized antimony trihalide to form a reaction mixture, while maintaining the reaction mixture at a pH of less than 7, to provide the SbSbS.sub.4 product having a low level of free sulfur impurity.

Antimony thioantimonate lubricant additive and preparation

Method of preparing alkali metal or ammonium thioantimonate and use of the thioantimonate in the preparation of SbSbS.sub.4, having a low level of free sulfur, and lubricants incorporating the SbSbS.sub.4 as an additive.

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Tulsa, OK, United States of America

Charles B Lindahl