E.i. Dupont De Nemours and Company

North Carolina State University

Bijan Amini

Donald J Dumas

George C Sonnichsen

Hou-min Chang

Hasan Jameel

John Robert Webster

Bruce A Evans

Junfu Song

Dingru Pan

Ronald A Fong

William John Bareford

Richard Edward Ernst

A process for treating a substrate, e.g., lignocellulosic pulp or cellulosic pulps, with a mixed peracid solution comprising percarboxylic acid and Caro's acid which results in a higher conversion rate of the active oxygen in the hydrogen peroxide in order to provide an inexpensive and effective delignification and/or bleaching solution and the process for making the mixed peracid solution.

Method of oxidatively treating a substrate with an equilibrium mixture

A process for treating a substrate, e.g., lignocellulosic pulp or cellulosic pulps with a mixed peracid solution comprising percarboxylic acid and Caro's acid which results in a higher conversion rate of the active oxygen in the hydrogen peroxide in order to provide an inexpensive and effective delignification and/or bleaching solution and the process for making the mixed peracid solution.

Process for preparing a bleaching liquor containing percarboxylic acid

An improved process for preparing phenyl esters of alkanoyloxyacetic acids in which phenyl chloroacetate is reacted with the salt of a carboxylic acid.

Process for preparing phenyl esters of substituted acids

An improved process for preparing alkanoyloxyacetyloxybenzenesulfonate salts in which phenyl esters of alkanoyloxyacetic acids (alkanoyloxyacetyloxybenzenes) are sulfonated to yield novel alkanoyloxyacetyloxybenzenesulfonic acids which, on neutralization, yield the corresponding alkanoyloxyacetyloxybenzenesulfonate salts.

Process for preparing benzenesulfonate salts

A stable, nonhygroscopic potassium monopersulfate composition comprising KHSO.sub.5, KHSO.sub.4 and K.sub.2 SO.sub.4 having a composition represented by a point within the closed curve of FGHIF of FIG. 1. A process for preparing a stable, nonhygroscopic potassium monopersulfate composition having the following formula:

Class of stable potassium monopersulfate compositions

Catalytic activity of a platinum group metal catalyst used in catalyzing the hydrogenation of a working solution of an alkylanthraquinone in a water-immiscible solvent in the manufacture of hydrogen peroxide, said catalyst having become at least partially inactivated, is regenerated by a process comprising contacting the catalyst in the presence of the working solution and in the absence of hydrogen with an oxidizing agent selected from the group consisting of an oxygen-containing gas and hydrogen peroxide. When the process of the invention is made an integral part of the cyclic anthraquinone process for producing hydrogen peroxide, there results an improvement in the latter process whereby the activity of the catalyst can be maintained at a high level.

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Moorestown, NJ, United States of America

Bijan Amini