Basf Corporation

Thomas L Varner, Jr

Charles R Minns

Timothy W Blount

William C Hiatt

Thomas A Hoermann

Methods of removing contaminant metals from aqueous waste streams. A preferred method includes providing an aqueous waste stream containing a metal having a valence of at least one, such as zinc, lead, chromium, copper, iron, aluminum, manganese, cadmium, gold, silver, and mixtures of these metals. The waste stream is substantially free of calcium and magnesium. The process also includes forming a substantially insoluble precipitate of said metal by mixing with the waste stream fatty acids; zinc, potassium, and sodium salts of fatty acids; and mixtures of these materials. The metal precipitate is separated from the waste stream and the water that is subject to the removal process remains substantially free of calcium and magnesium throughout the entire process. The methods of the present invention are particularly effective for the removal of trace amounts of zinc from aqueous waste streams from polystyrene processes.

Removing metals from aqueous waste streams

A method for removing various stains from stained fixed items uses an aqueous cleaning composition having a pH of at least about 9.0 and composed of up to about 30 percent by total composition weight of a wetting agent containing 1 to about 5 carbon atoms; between about 3 and about 15 percent by total composition weight of a peroxyhydrate oxidizing agent; and a pH adjustment substance.

Removing stains from fixed items

An aqueous cleaning composition has a pH of at least about 9.0 and is composed of up to about 30 percent by total composition weight of a wetting agent containing 1 to about 5 carbon atoms; between about 3 and about 15 percent by total composition weight of a peroxyhydrate oxidizing agent; and a pH adjustment substance.

Method for removing coffee stains from carpet

An aqueous composition cleans and sanitizes carpets and the like. The composition contains (in percents by weight) from about 3 to about 15 percent peroxide, up to about 5% of volatile ammoniated substance, up to about 30% volatile wetting agent, and the balance water. The solution is substantially completely volatile so that it does not leave a soil harboring residue.

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Williamsburg, VA, United States of America

Thomas L Varner, Jr