Mitsubishi Chemical Corporation

Genomatica, Inc.

Norikazu Konishi

Mark Joseph Burk

Takayuki Suzuki

Masaru Utsunomiya

Yusuke Izawa

Kouta Tanaka

Michael Japs

Shinichiro Matsuzono

Warren Clark

Toshiki Monden

Kota Tanaka

Shinichirou Matsuzono

Hiroki Shibata

Yuuichi Yayama

Yohei Nishino

Provided is an aromatic polycarbonate resin composition that exhibits an excellent surface hardness and strength as well as an excellent designability and lightfastness. The aromatic polycarbonate resin composition contains a carbonate structural unit (X) derived from an aromatic dihydroxy compound represented by a prescribed formula (1) and a carbonate structural unit (Y) derived from an aromatic dihydroxy compound represented by a prescribed formula (2) in a proportion of (X)/(Y)=10/90 to 40/60 as a molar ratio, wherein an amount of a cresolic hydroxy group derived from the aromatic dihydroxy compound represented by formula (1) is 60 to 160 ppm.

Aromatic polycarbonate resin composition

Provided is an aromatic polycarbonate resin that has not only high fluidity and thin-wall moldability but also excellent hue and transparency. The aromatic polycarbonate resin contains a structural unit derived from an aromatic dihydroxy compound and a carbonate-forming compound. A hydrolysate obtained by hydrolysis of the aromatic polycarbonate resin contains aromatic dihydroxy compounds represented by the following Formulae (2) and (3), and the content of the compound represented by Formula (2) is 250 ppm by mass or less with respect to that of the compound represented by Formula (3), wherein Rrepresents an alkyl group having 1 to 24 carbon atoms; Rand Reach independently represent a monovalent hydrocarbon group having 1 to 15 carbon atoms; and a and b each independently represent an integer of 0 to 4: 

Aromatic polycarbonate resin, method for producing same, and aromatic dihydroxy compound

An object of the present invention is to provide high-quality 1,4BG capable of working out to a raw material of PBT with good color tone, by efficiently removing and refining impurities mixed when producing a biomass-derived 1,4BG on an industrial scale and the present invention relates to a production method of refined 1,4BG, where a crude 1,4BG-containing solution is obtained from refined raw material 1,4BG obtained by removing bacterial cells, salt contents and water from the fermentation culture medium, through a step of removing high-boiling-point components and/or low-boiling-point components by distillation and/or a step of converting an unsaturated compound to a hydride and the target product is obtained as a side stream in a further distillation step.

Production method for 1,4-butanediol

A 1,4-butanediol-containing composition having a concentration of 1,4-butanediol of 99.00% by weight or more and not more than 99.99% by weight and containing 2-pyrrolidone or N-methylpyrrolidone in a concentration, as converted into a nitrogen atom, of from 1.0 to 25 ppm by weight and methods of use thereof.

1,4-butanediol-containing composition

At the time of producing a polyester by using a dicarboxylic acid component and a biomass-resource-derived diol as raw materials, a polyester is efficiently produced with good color tone, as the raw material diol derived from biomass resources, a diol in which the content of a cyclic carbonyl compound having a carbon atom number of 5 or 6 is from 0.01 to 12 ppm by mass, is used, and by controlling the content of a cyclic carbonyl compound having a carbon atom number of 5 or 6 in the raw material diol to fall in a prescribed range, the color tone of the polyester is improved.

Production methods of polyester and polyurethane

An object of the present invention is to provide an industrially advantageous production method of 1,4BG, ensuring that generation of THF in the crude 1,4BG can be also suppressed and at the same time, the concentration of 2-(4-hydroxybutoxy)-tetrahydrofuran can be reduced. The present invention relates to a method for producing 1,4-butanediol, comprising heating crude 1,4-butanediol containing from 0.01 to 0.5 wt % of 2-(4-hydroxybutoxy)-tetrahydrofuran and from 1 to 25 wt % of water at 80&#xb0; C. or more in the presence of an amine to obtain purified 1,4-butanediol.

Method for producing 1,4-butanediol

The present invention relates to a method for producing a hydride having a carbon number of 4, comprising contacting, in liquid phase, an unsaturated compound having a carbon number of 4 as a raw material with a solid catalyst obtained by loading a metal element belonging to Groups 9 to 11 of the long periodic table on a support, thereby performing hydrogenation to produce a corresponding hydride having a carbon number of 4, wherein hydrogenation is performed in the presence of, as a solvent, a 1,4-butanediol having a nitrogen component concentration of 1 ppm by weight to 1 wt % in terms of nitrogen atom.

Method for producing hydride using unsaturated compound having carbon number of 4 as raw material

The present invention is concerned with a method for producing tetrahydrofuran including carrying out a dehydration cyclization reaction of 1,4-butanediol in the presence of an acid catalyst having a pKa value of not more than 4 within a reactor, wherein a raw material liquid containing 1,4-butanediol to be provided for the reaction contains from 0.01 to 0.35% by weight of 2-(4-hydroxybutoxy)-tetrahydrofuran and 1 ppm by weight or more and not more than 1,000 ppm by weight of at least one of an amine and an amide in terms of a concentration as converted into a nitrogen atom.

Method for producing tetrahydrofuran

The present invention aims to provide a method for producing polybutylene terephthalate (PBT) with an excellent color using biomass-derived 1,4-butanediol (BG). The invention relates to a method for producing PBT comprising a step of subjecting a diol component containing raw material 1,4-BG having a nitrogen content of 0.01 to 50 ppm by mass and a dicarboxylic acid component to esterification or ester-exchange reaction, and a polycondensation reaction step for obtaining PBT from the reactant, wherein the content of gamma butyrolactone in the raw material 1,4-BG is 1 to 100 ppm by mass.

Method for producing polybutylene terephthalate

A 1,4-butanediol (1,4BG)-containing composition having high thermal stability, and having a concentration of 1,4-butanediol of 99.00% by weight or more and not more than 99.99% by weight and 2-pyrrolidone or N-methylpyrrolidone in a concentration, as converted into a nitrogen atom, of from 1.0 to 25 ppm by weight.

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Mie, Japan

Norikazu Konishi