公开(公告)号：US09434706B2

公开(公告)日：2016-09-06

申请号：US14150174

申请日：2014-01-08

Applicant: MITSUBISHI CHEMICAL CORPORATION

Inventor： Yusuke Izawa ,  Masaru Utsunomiya ,  Norikazu Konishi ,  Kouta Tanaka ,  Takayuki Suzuki ,  Shinichirou Matsuzono

IPC: C07C31/20 ,  C07D307/08 ,  C07C29/94 ,  C08G63/183 ,  C08G63/78 ,  C07D307/02 ,  C08K5/20

CPC classification number: C07C29/94 ,  C07D307/08 ,  C08G63/183 ,  C08G63/78 ,  C08K5/20 ,  C07C31/207

Abstract: 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.

Abstract translation: 具有高热稳定性，1,4-丁二醇浓度为99.00重量％以上且99.99重量％以下的1,4-丁二醇（1,4BG）组合物和2-吡咯烷酮或N 甲基吡咯烷酮，其转化为氮原子，为1.0至25重量ppm。

公开(公告)号：US12215191B2

公开(公告)日：2025-02-04

申请号：US17453190

申请日：2021-11-02

Applicant: Mitsubishi Chemical Corporation

Inventor： Ryo Yamashita ,  Yusuke Izawa ,  Masaru Utsunomiya

IPC: C08G65/26 ,  C08G18/48 ,  C08G65/20 ,  C08G65/30 ,  C08K5/17 ,  C08K5/20 ,  C09D175/04 ,  D01F6/70 ,  D01F6/86 ,  D06N3/14

Abstract: A polyalkylene ether glycol composition containing a nitrogen-containing compound. The nitrogen-containing compound constitutes 0.2 to 40 mass ppm of the polyalkylene ether glycol in terms of nitrogen atoms, and the nitrogen-containing compound has a boiling point in a range of −40° C. to 120° C. at atmospheric pressure. An elastic stretchable fiber, a polyurethane, a synthetic leather, or a thermoplastic elastomer containing the polyalkylene ether glycol composition.

公开(公告)号：US10144687B2

公开(公告)日：2018-12-04

申请号：US14147885

申请日：2014-01-06

Applicant: MITSUBISHI CHEMICAL CORPORATION

Inventor： Yusuke Izawa ,  Masaru Utsunomiya ,  Kouta Tanaka ,  Norikazu Konishi

IPC: C07C29/80 ,  C07C29/88

Abstract: 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° C. or more in the presence of an amine to obtain purified 1,4-butanediol.

公开(公告)号：US20180319757A1

公开(公告)日：2018-11-08

申请号：US16031501

申请日：2018-07-10

Applicant: Mitsubishi Chemical Corporation

Inventor： Yusuke Izawa ,  Hideto Tsuji ,  Yosuke Suzuki

IPC: C07D307/36 ,  C07D307/48 ,  B01J23/58 ,  C07B61/00

CPC classification number: C07D307/36 ,  B01J23/58 ,  C07B61/00 ,  C07D307/48

Abstract: The present invention is aimed to provide an industrially advantageous method for producing a furan compound, in which a furan compound can be efficiently obtained in a high selectivity from a furfural compound. The present invention is concerned with a method for producing a furan compound including feeding, as a raw material, a furfural composition containing a furfural compound into a reactor and subjecting to a decarbonylation reaction in the presence of a catalyst to obtain a furan compound as a product, wherein a furfural dimer concentration in the furfural composition is 1,000 ppm by weight or less, and a peroxide value in the furfural composition is 0.01 mEq/kg or more and 1.0 mEq/kg or less.

公开(公告)号：US10065938B2

公开(公告)日：2018-09-04

申请号：US15190244

申请日：2016-06-23

Applicant: MITSUBISHI CHEMICAL CORPORATION

Inventor： Yusuke Izawa ,  Masaru Utsunomiya ,  Norikazu Konishi ,  Kouta Tanaka

IPC: C07D307/20 ,  C07C29/17 ,  B01J21/08 ,  B01J23/44 ,  B01J23/755 ,  B01J23/86 ,  B01J35/00 ,  B01J35/02 ,  C07C45/62 ,  C07C45/86 ,  C07C29/94

CPC classification number: C07D307/20 ,  B01J21/08 ,  B01J23/44 ,  B01J23/755 ,  B01J23/866 ,  B01J35/0006 ,  B01J35/02 ,  C07C29/172 ,  C07C29/94 ,  C07C45/62 ,  C07C45/86 ,  C07C31/207

Abstract: 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.

公开(公告)号：US20160355491A1

公开(公告)日：2016-12-08

申请号：US15239232

申请日：2016-08-17

Applicant: MITSUBISHI CHEMICAL CORPORATION

Inventor： Shohei Taniguchi ,  Yusuke Izawa ,  Masaru Utsunomiya

IPC: C07D307/33

CPC classification number: C07D307/33

Abstract: An object of the present invention is to provide high-purity gamma-butyrolactone (GBL) capable of preventing occurrence of reaction other than the object at the time of use, which reaction is caused due to a high acidity of GBL, and the present invention relates to a gamma-butyrolactone composition containing gamma-butyrolactone and a nitrogen-containing compound, wherein a content of the gamma-butyrolactone is 99.0% by mass or more, and a total content of the nitrogen-containing compound is 0.1 ppm by mass to 1,000 ppm by mass as converted to a nitrogen atom.

Abstract translation: 本发明的目的是提供能够防止在使用时发生除了目的物之外的反应的高纯度γ-丁内酯（GBL），该反应是由于GBL的高酸度而引起的，本发明 涉及含有γ-丁内酯和含氮化合物的γ-丁内酯组合物，其中γ-丁内酯的含量为99.0质量％以上，含氮化合物的总含量为0.1质量ppm〜 1000质量ppm转化为氮原子。