Betz Laboratories, Inc.

Philip S Davis

Robert L Jones

Lewis Volgenau

Ian D Morrison

Larry W Becker

Gerald D Hansen

Elizabeth G Varney

The present invention relates to a method for treating an aqueous medium containing magnesium sulfite tri-hydrate under precipitating conditions which method comprises adding to the medium an effective amount for the purpose of a sulfur-containing lignin.

Sulfur-containing lignins as magnesium sulfite tri-hydrate dispersants

The present disclosure is directed to oligomeric phosphonic acid derivatives which possess excellent chlorine resistance and acceptable calcium tolerance and which, at substoichiometric amounts, inhibit the formation of scale in aqueous mediums. Additionally, the oligomers have been found to be quite active as dispersants for particulate matter contained in an aqueous medium.

Deposit control through the use of oligomeric phosphonic acid derivatives

A composition is disclosed for use in dispersing magnesium sulfite tri-hydrate in an aqueous medium which composition comprises, in combination, an oligomer and a copolymer of a 1-olefin and an unsaturated anhydride.

Compositions for treating aqueous mediums containing magnesium sulfite

A method is disclosed for treating an aqueous medium containing magnesium sulfite tri-hydrate under precipitating conditions comprising adding in combination to the aqueous medium an effective amount for the purpose of an oligomer and a sulfur-containing lignin.

Method for treating aqueous mediums

A method is disclosed for treating an aqueous medium containing magnesium sulfite tri-hydrate under precipitating conditions comprising adding in combination to the aqueous medium an effective amount for the purpose of an oligomer and a copolymer of a 1-olefin and an unsaturated anhydride.

Method for treating aqueous mediums containing magnesium sulfite

The present invention is directed to pulp bleaching processes, and in particular compositions for use in the bleaching process to enhance the efficiency of the process. It was discovered that if a low molecular weight water soluble polymer of acrylic acid, or water soluble salt thereof was added either alone or together with a carboxymethyl cellulose to the bleaching solution, that less bleaching solution was required.

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Furlong, PA, United States of America

Philip S Davis