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Elf Atochem North America, Inc.

Atochem North America, Inc.

Elf Atochem N.a., Inc.

Thomas H Overgaard

Louis P Verduce

Gary S Smith

Robert Cordova

Marc T Budrick

Gregory J Cutting

A method is disclosed for the preparation of alkanesulfonamide containing low amounts of ammonium or alkylammonium-salt impurities wherein alkanesulfonamide is treated with a base to convert ammonium or alkylammonium-salt impurities to their corresponding base salts and to liberate neutral amine or ammonia.

Preparation of alkanesulfonamides with low residual ammonium impurities

Tertiary-butyldiethanolamine subject to color deterioration is purified and stabilized against color formation by vacuum distilling said amine at a pressure within the range of 1 to 50 mm.Hg (1-50 torr) in the absence of a reducing agent,

Process for preparing color-stable tertiary butyldiethanolamine

Off-color N-(C.sub.4 -C.sub.10)alkyl di(C.sub.2 -C.sub.3) alkanolamines purified and decolorized by vacuum distillation at a pressure within the range of 1 to 50 mm.Hg (1-50 torr) in the presence of water and or water-soluble metal borohydride whereby the distilled alkanolamine has a reduced APHA color rating which is maintained on storage.

Purification and decolorization of off-color alkyl alkanolamines

A method is disclosed to prepare a uniform, stable dispersion of an additive amount of a water-insoluble, high viscosity liquid polyalkylene glycol derivative in a substantially nonaqueous, water-soluble alkanolamine by combining under pressure a proportionate amount of the total polyglycol derivative to be added to the alkanolamine component, or mixture of alkanolamine and polyglycol derivative, subjecting the mixture to shear stress, and repeating the procedure until a uniform colloidal dispersion is obtained of the alkanolamine containing the desired additive amount of polyglycol derivative.

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Redford Township, MI, United States of America

Thomas H Overgaard