E.i. Dupont De Nemours and Company

Invista North America S.a.r.l.

Sterling Diagnostic Imaging, Inc.

Inuista North America S.&agrave;.r.l.

Sterling Diagnsotic Imaging, Inc.

Ludovic Fodor

Rolf Thomas Weberg

Timothy D Weatherill

Richard Roy Jones

Bhagya Chandra Sutradhar

Dominic M Chan

Dennis S Donald

Bruce Edwin Murphree

John R Shock

Glenn M Russo

William R Pangratz

Julie C Bishop

David Paul Landray

Reinhold R Uger

James Marvin Rung

Bennett Haines Novak

Jules Charles Joseph Perilloux, Jr

A method for reducing the concentration of cyclohexenone in a cyclohexenone containing organic mixture is disclosed. The method includes contacting an organic mixture comprising cyclohexenone with an effective amount of at least one of sulfurous acid, a salt of sulfurous acid, an alkali hydroxide, or a mixture of two or more of these compounds.

Method for reducing cyclohexenone content of a cyclohexenone-containing organic mixture

Process for oxidizing cyclohexane in which oxygen is contacted with cyclohexane at a pre-selected feed rate in a first reaction zone and unconsumed oxygen is contacted with cyclohexane in a second reaction zone in which the cyclohexane feed rate is lower than the pre-selected feed rate.

Process for oxidation of cyclohexane

Disclosed herein is a process for reducing or substantially eliminating chromium in non-volatile residue obtained from a certain processes, and particularly from cyclohexane oxidation processes.

Process for reducing chromium in nonvolatile residue resulting from air oxidation of cyclohexane

Disclosed herein is a process for the production of a mixture of cyclohexanone and cyclohexanol by oxidation of cyclohexane and decomposition of cyclohexyl hydroperoxide.

Disclosed is a process for cyclohexyl hydroperoxide (CHHP) decomposition using in aqueous alkaline solution in presence of cobalt catalyst.

High yield cyclohexyl hydroperoxide decompostition process

An improved method of hardening a hydrophilic colloid is detailed. The hardening results in a stronger matrix and less water pickup. These and other advantages are obtained by hardening with a combination of at least one hardener chosen from Formula I either alone or in combination with at least one hardener chosen from Formula II: ##STR1## The substituents are defined.

Hardening of hydrophilic colloids with imidazolium and triazine

This invention is related to improved hardeners for proteinaceous materials. More specifically this invention is related to improved imidazolium hardeners for crosslinking a proteinaceous material for use in a photographic film. The improved hardeners are defined by the formula: ##STR1##

Imidazolium hardeners for hydrophilic colloids

An improved hardener and a photographic element comprising same defined by ##STR1## wherein: the substituent groups are as defined in the specification.

Imidazolium hardeners

Hardeners for hydrophilic colloid defined by the formula: ##STR1## The hardeners are for crosslinking proteinaceous materials for use in photographic films.

Imidazolium hardeners for hydrophilic colloid

An improved imidazolium hardener is described. These novel hardners are specifically advantageous for hardening, or crosslinking, a hydrophilic colloid in a photographic element. The advance in the art is realized in A hardening agent chosen from the set consisting of: ##STR1## wherein: Y.sup.1 represents an alkyl of 6-24 carbons, aryl of 6-24 carbons, aralkyl of 7 to 25 carbons, the atoms chosen from C, N, O, and S necessary to form a 5- or 6-membered ring, or --L.sup.1 CR.sup.13 CH.sub.2 ;

Photographic element hardened with imidazolium hardeners

A process of developing exposed silver halide elements comprises developing said element in a developer in the presence of a development accelerator compound as defined. The development accelerator compounds include pyridinium, or pyridinium and and imidazolium compounds. The process is applicable to standard and hydrazine-containing films and to hydroquinone and/or ascorbic acid-based developers. The development accelerator may be incorporated into the developer or into the silver halide emulsion.

Process for rapid access development of silver halide films using

An improved imidazolium hardener is described. These novel hardeners are specifically advantageous for hardening, or crosslinking, a hydrophilic colloid in a photographic element. The advance in the art is realized in A hardening agent chosen from the set consisting of: ##STR1##

Imidazolium hardeners for proteinaceous materials

A process for stabilizing aqueous solution of aryl hydrazides is described. These solutions may be made by the addition of a stabilizing amount of ascorbic acid, isoascorbic acid, erythorbic acid, tartaric acid, citric acid. glucose and a cyclodextrin, etc., or mixtures, for example. When aqueous solutions of aryl hydrazides containing these stabilizers/antioxidants are prepared, the solution will have a shelf life of up to 30 days compared to 1-3 hours of solutions without the stabilizer/antioxidant. The stabilized aryl hydrazide is useful in photographic silver halide emulsions, etc.

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Hendersonville, NC, United States of America

Ludovic Fodor