American Cyanamid Company

Cytec Technology Corporation

Peter J Strydom

Samuel S Wang

Donald Paul Spitzer

Morris E Lewellyn

Yun-Lung Fu

Edward E Miller

Michael C Davies

Keith P Williams

Alexander S Lambert

There are provided compositions and processes for enhancing the initial and long term shear strength and initial tip stability of process wastes. The process wastes are aqueous dispersions such as the slurry tailings from mining operations. The compositions are comprised of the process waste, cement and a water absorbent polymer which is a mixture of Mannich acrylamide polymers and dimethyldiallyammonium halide polymers.

Composition and process for increasing the shear strength of processing

A process is disclosed for reducing the turbidity of a Bayer process liquor containing a cationic polymer-humate complex comprising adding to said liquor a higher molecular weight, cationic polymer.

Removal of humate from bayer alumina liquors

A process of profile modifying permeable soils with an environmentally safe composition of a non-toxic water-soluble polymer, a redox couple of a water-soluble ferrous salt and a non-toxic, oxidizing agent which are mixed in water and pumped into a subterranean formation wherein ferrous ion is oxidized to ferric ion to gel the polymer making the subterranean formation impermeable.

Crosslinking water soluble polymers with iron to form gels for use in

Alkoxy and aryloxy isothiocyanates are produced by the reaction of a haloformate and an alkali or alkaline earth metal thiocyanate in the presence of water and a catalyst comprising a six membered mononuclear or ten membered fused polynuclear aromatic, heterocyclic compound having 1 or 2 nitrogen atoms as the only hetero atoms in the ring.

Novel process of alkoxy and aryloxy isothiocyanate preparation

Derivatives of alkoxy, aryloxy and alkene isothiocyanates are produced by the reaction of a haloformate, an alkali, alkaline earth metal, lead or ammonium thiocyanate and a compound having the formula R.sup.1 YH wherein R.sup.1 is alkyl, aryl or alkoxy, Y is oxygen, sulfur or NR.sup.2 and R.sup.2 is hydrogen or R.sup.1, in the presence of a solvent or water and a catalyst.

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Morristown, NJ, United States of America

Peter J Strydom