Celanese Corporation

Florence, KY, United States

Celanese Corporation

Florence, KY, United States

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Patent
Celanese Corporation | Date: 2016-09-16

An aqueous carpet coating composition comprises: (A) at least one particulate filler material; and (B) a stabilized copolymer dispersion comprising: (a) a copolymer formed by emulsion polymerization of a monomer mixture comprising a vinyl ester of an alkanoic acid having 1 to 18 carbon atoms and 1 to 25 pphm of ethylene, wherein the copolymer comprises particles having a weight average particle size, d_(w), of at least 200 nm as determined by Beckman Coulter LS 13320; (b) water; and (c) a stabilizing system comprising (i) 1 to 4 pphm of an emulsifier component consisting of at least one non-ionic surfactant and (ii) 0.5 to 4 pphm of at least one first polyvinyl alcohol component having a degree of hydrolysis greater than 92 mol %.


Patent
Celanese International Corporation | Date: 2016-12-06

A cellulose acetate lacquer composition comprises a film forming composition and a diluent. The film forming compositions comprise cellulose acetate, a plasticizer, a secondary film former, and at least one organic solvent. The lacquer compositions may be used in a method of providing a finish or protective cover on at least a portion of a substrate. The method comprises applying the lacquer composition to an inner or exterior surface of the substrate.


Patent
Celanese International Corporation | Date: 2017-03-08

A process is disclosed for producing ethanol, comprising contacting acetic acid and hydrogen in a reactor in the presence of a catalyst comprising a binder and a mixed oxide comprising cobalt and preferably tin, wherein the mixed oxide is present in an amount from 60 to 90 wt.%, based on the total weight of the catalyst.


Patent
Celanese International Corporation | Date: 2017-08-09

Process for producing acetic acid is disclosed in which the reaction medium is separated into a liquid recycle and a vapor product stream including acetic acid, methyl iodide, methyl acetate and water in a flash vessel. The vapor product stream is condensed into a liquid stream that is enriched in acetic acid and this liquid stream is further sent to the distillation columns to recover acetic acid. The process advantageously improves the capacity of the acetic acid production while reducing the amount of acetic acid that is recycled.


An apparatus for producing acetic acid comprising: (a) a reactor containing a homogeneous Group VIII metal catalyst for carbonylating methanol or its reactive derivatives in the presence of the Group VIII metal catalyst and methyl iodide promoter to produce a liquid reaction mixture including acetic acid, water, methyl acetate and methyl iodide; (b) a flash vessel adapted to receive a stream of the reaction mixture and flash the reaction mixture at a reduced pressure to produce a crude product vapor stream; and (c) a heat transfer system coupled to the reactor and the flash vessel operative to transfer heat from the reactor to the flash vessel so as to elevate the temperature of the crude product vapor stream as compared with the temperature of a like stream undergoing adiabatic flashing.


Patent
Celanese Corporation | Date: 2016-03-17

A process for producing acetic acid is disclosed in which the water concentration is controlled in the side stream between two columns. Controlling the water concentration by the liquid light phase recycle controls the hydrogen iodide concentration in the side stream to be less than 50 wppm.


Patent
Celanese Corporation | Date: 2016-04-04

A process for producing acetic acid is disclosed in which the methyl iodide concentration is maintained in the vapor product stream formed in a flashing step. The methyl iodide concentration in the vapor product stream ranges from 24 to less than 36 wt. % methyl iodide, based on the weight of the vapor product stream. In addition, the acetaldehyde concentration is maintained within the range from 0.005 to 1 wt. % in the vapor product stream. The vapor product stream is distilled in a first column to obtain an acetic acid product stream comprising acetic acid and up to 300 wppm hydrogen iodide and/or from 0.1 to 6 wt. % methyl iodide and an overhead stream comprising methyl iodide, water and methyl acetate.


A process is disclosed for producing ethanol, comprising contacting hydrogen and a feed stream comprising acetic acid in a reactor in the presence of a catalyst comprising a binder and a mixed oxide comprising a promoter metal and tin, and preferably also comprising cobalt. The promoter metal is selected from the group consisting of rhenium, ruthenium, rhodium, palladium, osmium, iridium, platinum, and combinations thereof. The feed stream may comprises pure acetic acid or may comprise a mixture of 50 to 95 wt. % acetic acid and 5 to 50 wt. % ethyl acetate.


Patent
Celanese Corporation | Date: 2016-09-20

Anti-fog compositions comprising a primary film having opposing major planar surfaces and a central coplanar region disposed between the opposing major planar surfaces and comprising cellulose acetate and a plasticizer. The cellulose acetate may have a degree of substitution less than 2.6. The plasticizer may be selected from the group consisting of 1,2,3-triacetoxypropane (triacetin), tributyl citrate, triethyl citrate, triphenyl phosphate, tris(clorisopropyl)phosphate, dimethyl phthalate, diethyl phthalate, bornan-2-one, PEG-DGE, PPG-DGE, tributyl phosphate, and combinations thereof. The primary film has a thickness greater than 90 microns.


Patent
Celanese Corporation | Date: 2016-09-22

An agricultural spray pre-mix composition, comprising from 0.01 wt % to 40 wt % of an agricultural spray adjuvant comprising a vinyl ester-based or vinyl acrylate-based polymer dispersion and greater than 15 wt % of a plasticizer and from 1 wt % to 50 wt % of a water conditioning agent.

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