American Cyanamid Company

Morris E Lewellyn

Samuel S Wang

Eugene L Smith, Jr

Charles Dugan

Donald Paul Spitzer

Peter J Strydom

A process for the preparation of hydroxamated polymers of acrylamide is disclosed whereby the polymer is reacted with a hydroxylamine salt at pH of at least about 8.0.

Preparation of modified acrylamide polymers

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

A process for the preparation of N-allyl-O-alkyl thionocarbamates is disclosed which comprises reacting in an aqueous solvent and in the presence of a phase transfer catalyst a cyanide salt, sulfur and an allyl halide to form an allyl isothiocyanate and then reacting said allyl isothiocyanate in the presence of certain catalysts with an alcohol.

Process for the preparation of N-allyl-O-alkyl thionocarbamates

An improvement in the process for the preparation of N-allyl-O-alkyl thionocarbamates by the reaction of an allyl isothiocyanate with an alcohol is disclosed which comprises the use of a catalyst of the general formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, and R.sub.5 are individually selected from alkyl or aryl or a mixture thereof, M represents a metal from Group III B, IV B, or V B of the Periodic Table of the Elements, and n is the integer 0 or 1; provided that the sum of n.sub.1, n.sub.2, n.sub.3, n.sub.4, and n.sub.5 equals the valance of said metal M.

Modified tall oil pitch is blended with a metallurgical addition agent and briquetted, extruded, molded, pelletized, or tabletized into a unitary composition. The tall oil pitch is modified chemically to increase the molecular weight and improve the binding properties.

Addition agent composition

Mineral and coal concentrates are effectively dewatered by a process wherein there is employed a dewatering aid comprising of an N-substituted sulfosuccinamate. The process provides for mixing the dewatering aid to an aqueous slurry of the concentrate and thereafter subjecting the treated slurry to filtration.

Process for dewatering mineral and coal concentrates

Treatment of a slurry of a mineral concentrate with a flocculant followed by a combination of an anionic surfactant and a water-insoluble organic liquid provides reduced moisture content upon dewatering the thus-treated slurry.

Process for dewatering mineral concentrates

Mineral concentrates are dewatered by filtration employing as a dewatering aid the mixture of a hydrophobic alcohol and a nonionic surfactant for significantly lower residual water contents.

The mixture of a hydrophobic alcohol and a nonionic surfactant is an effective dewatering aid for mineral concentrates, significantly lowering the moisture content.

Dewatering aid composition

Fine coal is recovered with reduced ash content when a bis(alkyl)ester of a sulfosuccinic acid salt is employed as conditioning agent in froth flotation thereof.

Process for recovery of fine coal

A conditioning agent comprising a frother and a bis(alkyl)ester of a sulfosuccinic acid salt provides high coal recovery with reduced ash content.

Conditioning agent for froth flotation of fine coal

The use of a dialkylsulfosuccinic acid or salt thereof as a dewatering aid in the filtration of mineral concentrates provides reduced moisture content and substantial retention of the dewatering aid on the dewatered mineral concentrate when the alkyl groups of the dewatering aid contain 10 to 24 carbon atoms.

Sodium dialkyl sulfosuccinates as dewatering aids in the filtration of

A dewatering aid for mineral concentrates comprising an ethoxylated secondary alcohol, a dialkylsulfosuccinic acid or salt thereof, and a mono(ethoxylated alcohol) carboxylate ester of a sulfosuccinic acid or salt thereof provides improved dewatering with high aid retention on the dewatered concentrate.

Growing community of inventors

Stamford, CT, United States of America

Morris E Lewellyn