Eastman-kodak Company

Other

Eastman Chemical Company

Dale E Van Sickle

Robert Richard Dykstra

Jeffrey Scott Dupont

George Chester Zima

Garry L Myers

John C Morris

Jean Carroll Fleischer

Steven Leroy Cook

Glenn C Jones

Bruce L Gustafson

Gordon C Newland

Carl M Lentz

William D Nottingham

Brad William Overturf

Joseph S Bowers, Jr

Jeffrey J Siirola

Marvin A McCall

Ted R Walker, Jr

The invention relates to stabilized amido acid compositions. More particularly, the invention relates to compositions of amido acids, such as 6-nonanoylamidohexanoic acid, stabilized with antioxidants. The stabilized amido acid compositions are useful in the manufacture of bleach activators such as sodium nonanamidohexanoyloxybenzenesulfonate. Bleach activators made from the stabilized amido acids of the invention are capable of possessing improved coloration.

Stabilization of amido acids with antioxidants

Monoesters and macrocyclic diesters of 2,2,4-trimethyl-1,3-pentanediol and phthalic acid or a derivative thereof are described. Methods by which such monoesters and diesters may be prepared are also described. The mono- and diesters according to the invention are useful in the preparation of clear, hard thermoplastic polymers. The thermoplastic polymers are useful in coatings, inks, reinforced plastics and packaging materials.

Monoesters and macrocyclic diester of phthalic acid and synthesis thereof

A continuous process for the production of diacetate derivatives of aromatic compounds, comprising feeding at any convenient temperature an oxygen-containing gas and feedstock comprising a diisopropyl ring substituted aromatic compound and the recycled monoisopropyl-monoacetate derivative thereof, to an oxidizer operated, for example, at from about 10.degree. C. to about 150.degree. C. and oxygen partial pressures of from about 0.05 to 10 atmospheres to form an oxidizer product comprising the mono- and dihydroperoxides of the feedstock, feeding the oxidizer product to a rearrangement-esterification zone containing acetic anhydride at from about 0.degree. C. to 150.degree. C. to form an ester product comprising the diacetate and monoisopropyl-monoacetate derivatives of the feedstock, distilling the ester product to separate the diacetate and monoisopropyl-monoacetate derivatives, and recycling the monoisopropyl-monoacetate derivative back to the oxidizer.

Process for manufacturing aromatic diacetates

Disclosed is a process for making quinones by oxidation of dihydroxyaromatic compounds in the presence of oxygen using supported platinum catalysts.

Oxidation of dihydroxyaromatic compounds to quinones

Disclosed is a process for the oxidation of 4,4'-diisopropylbiphenyl which gives an excellent ratio of dihydroperoxide to monohydroperoxide and a low amount of other oxygenated compounds. The dihydroperoxide can be converted, by known procedures, to 4,4'-biphenyldiol or a diester thereof which are valuable monomers used in the manufacture of high performance polyesters. Certain of the disclosed compounds such as the dihydroperoxide, monohydroperoxides and diesters are new compositions of matter.

Diisopropylbiphenyl mono- and di-hydroperoxides, process for the

A process for the formation and recovery of dialkyl naphthalene-2,6-dicarboxylates from poly-(alkylene naphthalene-2,6-dicarboxylate) polyesters. Alcoholysis of poly(ethylene naphthalene-2,6-dicarboxylate) in the presence of a transesterification catalyst on cooling yields solid dialkyl naphthalene-2,6-dicarboxylate which may be collected by filtration and further purified by recrystallization from xylenes. Novel alkyl hydroxyalkyl naphthalene-2,6-dicarboxylate compounds may be isolated from the filtrate and either reconverted to polyester or further alcoholized to dialkyl naphthalene-2,6-dicarboxylate.

Recovery of dialkyl naphthalene-2,6-dicarboxylates from

Process is disclosed for the preparation of phenylhydroquinones by the alkylation of hydroquinone (or derivatives thereof) with the cyclohexyl moieties, cyclohexanol or cyclohexene (or derivatives thereof), followed by dehydrogenation of the intermediate cyclohexylhydroquinone.

Synthesis of phenylhydroquinones

Disclosed is a process for producing dimethyl or novel diphenyl derivatives of stilbenedicarboxylic acids from dimethyl toluates or diphenyl toluates and sulfur. The reaction requires an excess of toluate to sulfur of at least about 5:1. In addition hydrogen sulfide is removed from the reaction zone.

Process for the preparation of stilbenedicarboxylate derivatives

The preparation of 4,4'-dimethylstilbenedicarboxylate by acetylating 4,4'-bis(methoxycarbonyl)benzoin to give 4,4'-bis(methoxycarbonyl)benzoin acetate, selectively reducing 4,4'-bis(methoxycarbonyl)benzoin acetate with hydrogen to give 1,2-bis(4-methoxycarbonylphenyl)ethanol, and subjecting the 1,2-bis(4-methoxycarbonylphenyl)ethanol to either (1) dehydration or (2) acetylation to 1,2-bis(4-carbomethoxyphenyl)-1-acetoxy ethane followed by pyrolysis thereof to give the 4,4'-dimethylstilbenedicarboxylate. In this process, the new compounds 4,4'-bis(methoxycarbonyl)benzoin acetate, 1,2-bis(4-methoxycarbonylphenyl)ethanol, and 1,2-bis(4-carbomethoxyphenyl)-1-acetoxy ethane are produced and the novel preparations thereof are performed.

Preparation of dimethyl 4,4'-stilbenedicarboxylate and intermediates

The process for preparing 4-isopropylphenol (4-IPP) from 2-isopropylphenol (2-IPP) comprising contacting phenol with 2-IPP in the presence of a catalyst system selected from: (1) the combination of sulfuric acid on comminuted acid clay and a molecular sieve; and (2) trifluoromethane sulfonic acid (TFMSA); at a temperature of from about 90.degree. C. to about 250.degree. C., preferably from about 110.degree. C. to about 200.degree. C., wherein the initial mole ratio of phenol/2-IPP is from about 6 to about 2, preferably from about 4 to about 2.5, for a sufficient period to give a mole ratio of 4-IPP/2-IPP in the reaction system of from about 0.6 to about 1.5, and preferably from about 0.8 to about 1.2, without significant meta-isopropylphenol formation, i.e., less than about 10 mole %. In the isolation procedure, distillation separates the reaction mixture into phenol, 2-IPP, and 4-IPP.

Process for preparation of 4-isopropylphenol

Disclosed is a process and apparatus for the chlorination of diketene, by contacting the diketene in nebulized form with chlorine gas, which contacting can be in the absence of a solvent or diluent, in an essentially uncooled reaction zone of short residence time followed by a cooling zone wherein at least a portion of the heat of reaction is removed from the product without the need for refrigeration.

Growing community of inventors

Kingsport, TN, United States of America

Dale E Van Sickle