公开(公告)号：US20140135511A1

公开(公告)日：2014-05-15

申请号：US14161081

申请日：2014-01-22

Applicant: Mitsubishi Chemical Corporation

Inventor： Yusuke IZAWA ,  Masaru UTSUNOMIYA ,  Norikazu KONISHI ,  Kouta TANAKA

IPC: C07D307/20 ,  C07C29/17

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.

Abstract translation: 本发明涉及碳原子数为4的氢化物的制造方法，其特征在于，以液相方式使碳原子数为4的不饱和化合物作为原料与通过将金属元素 在支撑体上的长周期表的第9至11组，由此进行氢化以产生碳数为4的相应的氢化物，其中氢化在作为溶剂存在下具有氮的1,4-丁二醇 组分浓度为1重量ppm至1重量％，以氮原子计。

公开(公告)号：US20190023674A1

公开(公告)日：2019-01-24

申请号：US16139574

申请日：2018-09-24

Applicant: Mitsubishi Chemical Corporation

Inventor： Yusuke IZAWA ,  Yosuke Suzuki ,  Masaru Utsunomiya

IPC: C07D307/50

Abstract: The present invention relates to a method for producing furfural, including: obtaining a sugar solution containing at least one of a monosaccharide having 5 carbon atoms and a polysaccharide containing the monosaccharide having 5 carbon atoms by carrying out a reaction with a specific resource as a raw material in the presence of a catalyst in a solvent; converting at least one of the monosaccharide and the polysaccharide containing the monosaccharide in the sugar solution into furfural by a dehydration reaction, so as to obtain a reaction solution; and separating the reaction solution into an organic layer and an aqueous layer, wherein an aromatic hydrocarbon solvent having a density of from 0.90 g/cm3 to 1.1 g/cm3 at 25° C. and under atmospheric pressure is used, and wherein the reaction solution is separated at a temperature higher than 90° C. and lower than 150° C.

公开(公告)号：US20170050943A1

公开(公告)日：2017-02-23

申请号：US15345838

申请日：2016-11-08

Applicant: MITSUBISHI CHEMICAL CORPORATION

Inventor： Yusuke IZAWA ,  Norikazu Konishi ,  Yosuke Suzuki

IPC: C07D307/36 ,  C07D307/48

CPC classification number: C07D307/36 ,  C07D307/48

Abstract: A problem is to provide an industrially advantageous method in which in purifying a furfural composition, the formation of a solid matter which have been unable to be controlled so far is stably reduced, and furfural is purified with high efficiency wherein the problem has been solved by a method for producing furfural including distilling a composition containing furfural by a distillation column to obtain furfural, wherein a concentration of a furfural dimer in a column bottom liquid of the distillation column is controlled to 20 ppm by mass to 5,000 ppm by mass.

Abstract translation: 问题在于提供一种工业上有利的方法，其中在糠醛组合物的纯化中稳定地减少迄今为止不能控制的固体物质的形成，并且糠醛以高效率纯化，其中问题已经通过 一种生产糠醛的方法，包括通过蒸馏塔蒸馏含有糠醛的组合物以获得糠醛，其中将蒸馏塔的塔底液体中的糠醛二聚体的浓度控制在20质量ppm至5,000质量ppm。

公开(公告)号：US20140121390A1

公开(公告)日：2014-05-01

申请号：US14147894

申请日：2014-01-06

Applicant: MITSUBISHI CHEMICAL CORPORATION

Inventor： Yusuke IZAWA ,  Masaru Utsunomiya ,  Eiji Hattori

IPC: C07D307/08

CPC classification number: C07D307/08

Abstract: The present invention relates to a method for producing tetrahydrofuran comprising: feeding raw material 1,4-butanediol containing gamma butyrolactone to a reaction tank, and performing a dehydration cyclization reaction in the presence of a homogeneous acid catalyst having a pKa of 4 or less and being dissolvable in 1,4-butanediol to produce tetrahydrofuran, wherein a gas containing tetrahydrofuran, gamma butyrolactone and water in the reaction tank is introduced into a heat exchanger and when obtaining a condensate from the outlet of the heat exchanger, the ratio of the concentration of gamma butyrolactone in the condensate based on the concentration of gamma butyrolactone in the raw material 1,4-butanediol is from 20 to 100%.

Abstract translation: 本发明涉及四氢呋喃的制造方法，其特征在于，将含有γ-丁内酯的原料1,4-丁二醇加入到反应槽中，在pKa为4以下的均相酸催化剂的存在下进行脱水环化反应，以及 可溶于1,4-丁二醇生产四氢呋喃，其中将反应罐中含有四氢呋喃，γ-丁内酯和水的气体引入热交换器，当从热交换器的出口获得冷凝物时，其浓度比 基于γ-丁内酯在原料1,4-丁二醇中浓度为20〜100％的缩合物中的γ-丁内酯。

公开(公告)号：US20140116872A1

公开(公告)日：2014-05-01

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

CPC classification number: C07C29/80 ,  C07C29/88 ,  C07C31/207

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.

Abstract translation: 本发明的目的是提供1,4BG的工业上有利的制备方法，确保粗制1,4BG中THF的产生也可以被抑制，同时2-（4-羟基丁氧基） 可以减少四氢呋喃。 本发明涉及生产1,4-丁二醇的方法，包括加热含有0.01至0.5重量％的2-（4-羟基丁氧基） - 四氢呋喃和1至25重量％的水的粗1,4-丁二醇， 80℃以上，得到纯化的1,4-丁二醇。