Degussa Gmbh

Colgate Palmolive Company

Christopher R Proulx

William Chirash

Wilfried Eul

Gregg A Vickell

Jaganmay Chattopadhyay

Marioara V Ionila

Harold E Crosier

A process for the removal of thiosulphate from spent Stretford solution, The process comprises adjusting the spent Stretford solution to an acidic pH, preferably in the range of 1 to 3, and adding a peroxygen compound. The process allows the user to recycle spent Stretford solution in a cost effective manner by taking advantage of previously unknown buffering properties in the solution.

Removal of thiosulfate from Stretford solution with hydrogen peroxide

A method is disclosed for detoxifying an aqueous waste solution containing cyanide. The method involves adding a source of silicon oxide to the cyanide containing aqueous waste solution in a concentration of 0.001 to 10 g silicon dioxide/liter aqueous waste solution, at an alkaline pH and a temperature of from 10.degree. to 100.degree. C. Hydrogen peroxide or another peroxygen compound is added in a sufficient quantity to convert the aqueous waste solution containing cyanide to an aqueous solution containing environmentally less toxic materials.

Destruction of cyanide and other pollutants in aqueous solutions

A stable, high foaming, light duty liquid abrasive-containing dishwashing composition containing about 3% to 15% by weight of a water insoluble, particulate, low density abrasive suspended in an aqueous vehicle comprising at least one water-soluble, anionic sulfated or sulfonated detergent salt containing an alkyl group or alkenyl group having from 8 to 20 carbon atoms in the molecule, a betaine foam booster, about 1-3% by weight of a substantially completely hydrated colloidal clay as a stabilizing agent and, optionally, about 2% to 9% of a C.sub.2 -C.sub.3 alcohol is disclosed. The presence of the abrasive greatly improves the cleaning efficacy in removing baked-on and/or dried-on food residues without significant scratching when used full strength. Also, within the scope of the invention is a method of making liquid, abrasive-containing, dishwashing compositions which have improved stability against separation and are of low viscosity which comprises the steps of preparing a presheared clay/water mixture to substantially fully hydrate the clay suspending agent and adding said mixture to the remainder of the composition as the last ingredient with agitation sufficient to disperse the clay suspension without aeration of the resultant mixture and continuing such agitation while monitoring viscosity until a consistent minimum viscosity is attained after an initial increase to a viscosity maximum.

Light duty liquid dishwashing composition containing abrasive

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Piscataway, NJ, United States of America

Christopher R Proulx