Eastman Chemical Company

Eastman-kodak Company

George G Mayfield

Phillip Michael Cook

Lanny Calvin Treece

Michael D Hamlin

Charles R Tomlinson

Joseph Robert Zoeller

Steven Leroy Cook

Victor H Agreda

Horace Lawrence Browning, Jr

Thomas L Yount

Elizabeth MacGowan West

A gum base comprising a crosslinked branched polyester gel prepared from the process comprising: a) providing a first pre-gel composition having carboxyl end groups; b) providing a second pre-gel composition having hydroxyl end groups; c) removing either or both of the first and second pre-gel compositions from their respective reactors; d) combining the first and second pre-gel compositions to form a mixture; and e) processing the mixture in an extruder, a continuous processor, or a container thereby providing a crosslinked branched polyester gel.

Crosslinked branched polyesters

Process for crosslinked branched polyesters

Disclosed is a process for the preparation of aliphatic carbonyl compounds selected from aliphatic carboxylic acids, alkyl esters of aliphatic carboxylic acids and anhydrides of aliphatic carboxylic acids by the carbonylation of olefins in the presence of a catalyst system comprising (1) a primary component selected from at least one Group 6 metal, i.e., chromium, molybdenum, and/or tungsten and (2) a secondary component selected from at least one of certain halides and tertiary and quaternary compounds of a Group 15 element, i.e., nitrogen, phosphorus and/or arsenic. The process constitutes and improvement over known processes since it can be carried out at moderate carbonylation conditions without the necessity of using an expensive noble metal catalyst, volatile, toxic materials such as nickel tetracarbonyl, formic acid or a formate ester.

Carbonylation of olefins

Disclosed is a process for preparation of a stream which is both selectively high in 2,6-diiodonaphthalene and also contains substantial quantities of diiodonaphthalene. First, naphthalene is oxyiodinated in the presence of a zeolite catalyst to produce a stream which is selectively high in 2-monoiodonaphthalene and the 2-monoiodonaphthalene is separated from the stream to produce a stream which is both selectively high in 2-monoiodonaphthalene and contains substantial quantities of 2-monoiodonaphthalene. Second, this stream is then oxyiodinated in the presence of a zeolite catalyst to produce a stream which is selectively high in 2,6-diiodonaphthalene and then 2,6-diiodonaphthalene is separated from the stream to produce the stream which is both selectively high in 2,6-diiodonaphthalene and contains substantial quantities of 2,6-diiodonaphthalene.

Oxyiodination process for manufacture of 2,6-diiodonaphthalene

A process for the liquid-phase oxyiodination of naphthalene which comprises (1) preparing a liquid-phase feed mixture of iodine and naphthalene and/or iodine, naphthalene and iodonaphthalenes, and (2) contacting the feed mixture with a zeolite catalyst in the presence of a gaseous source of oxygen to produce an iodinated naphthalene mixture and water, and (3) removing water from the iodinated naphthalene mixture.

Liquid-phase process for the oxyiodination of naphthalene

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Kingsport, TN, United States of America

George G Mayfield