Olin Corporation

Other

John A Herbst

Robert J Fairbrother

Ellwood L Lines

Jan D Miller

Richard A Hagstrom

Milton E Wadsworth

John L Kolbe

Howard Wayne Hayden

An epoxidation method is described wherein an alkylene compound is reacted with a peroxidic compound, e.g., H.sub.2 O.sub.2, in the presence of an improved molybdenum catalyst which is prepared by a selective reaction involving an oxygen-containing molybdenum compound, an amine, and an alkylene glycol.

Catalytic epoxidation of alkylene compounds

A process for hydrometallurgically recovering copper from concentrates of chalcopyrite and other sulfide and mixed sulfide ores utilizes the pretreatment step of fine grinding of the concentrates coupled with subsequent leaching steps. As a pretreatment for the copper-containing concentrates, the concentrates are ground, preferrably with an attritor-type grinding device, to reduce the particle size of the copper bearing concentrate to one micron or less in size. The finely ground copper concentrate is then leached in an acidified ferric sulfate solution to recover the copper contained therein. Following the leching step, a solid-liquid separation is effected. Elemental sulfur may be recovered, and iron removal is achieved by crystallization of iron salts. Ferrous ion is then oxidized to ferric ion for recycling to the leaching step.

Acid ferric sulfate leaching of copper sulfide concentrates

Novel glycol soluble molybdenum catalysts and a method of preparing them are described. The catalysts, which are useful in epoxidation reactions, are prepared by reacting an oxygen-containing molybdenum compound, an amine, and an alkylene glycol, at elevated temperatures.

Novel glycol soluble molybdenum catalysts and method of preparation

A method of preparing molybdenum derivative compound catalysts for epoxidation reactions is described wherein an oxygen-containing molybdenum compound is reacted with an organic compound having vicinal hydroxyl groups in the presence of a hydrohalic acid selected from hydrofluoric acid, hydrochloric acid, hydrobromic acid and hydroiodic acid.

Method of preparing molybdenum derivative compound catalysts for

Novel molybdenum salt catalysts and a method of preparing them are described. The catalysts, which are useful in epoxidation reactions, are prepared by reacting an oxygen-containing molybdenum compound, hydrogen peroxide and an amine, and optionally water or an alkylene glycol, at elevated temperatures.

Molybdenum salt catalysts and methods of preparing them

This disclosure is directed to a positive and negative pressure operated control device for use as a breath control device. The device includes a plurality of micro switches which can be sequentially actuated or rendered responsive to a person blowing or sucking on an expandible chamber whereby the change in pressure effected thereby will actuate the respective switches accordingly.

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Madison, CT, United States of America

John A Herbst