公开(公告)号：US20250025862A1

公开(公告)日：2025-01-23

申请号：US18714781

申请日：2022-11-29

Applicant: NIPPON KAYAKU KABUSHIKI KAISHA

Inventor： Tsukasa KAGAWA ,  Shigeki OKUMURA ,  Shogo YASUDA

IPC: B01J23/887 ,  B01J21/04 ,  B01J21/08 ,  B01J21/12 ,  B01J23/00 ,  B01J35/51 ,  B01J35/61 ,  B01J37/00 ,  B01J37/04 ,  B01J37/08 ,  C07C2/84 ,  C07C45/35 ,  C07C51/25

Abstract: The present invention relates to a catalyst in which a ratio (B/A) of a cumulative pore volume (B) in a pore diameter of 0.35 μm to 4.0 μm to a cumulative pore volume (A) in a pore diameter of 4.0 μm to 10.0 μm measured by mercury porosimetry is 2.5 to 15.0, and a cumulative specific surface area is less than 5 m2/g.

公开(公告)号：US20240424466A1

公开(公告)日：2024-12-26

申请号：US18570667

申请日：2022-05-25

Applicant: BASF SE

Inventor： Ulrich HAMMON ,  Christian RAITH ,  Hans-Juergen BASSLER

IPC: B01J19/00 ,  B01J8/06 ,  B01J19/24 ,  C07C51/25

Abstract: The present invention relates to a process for shutting-down a tubular reactor (1) for a catalytic gas phase reaction from a reaction temperature, wherein the tubular reactor (1) comprises a plurality of vertically arranged reaction tubes (2), an upper tube sheet (5) and a lower tube sheet (6) which each are connected to upper ends and lower ends of the reaction tubes (2) in a gas-tight manner, and a reactor shell (7) which encloses the plurality of reaction tubes (2) forming a liquid-tight heat transfer space (9), wherein, in operation mode, a substantially anhydrous liquefied salt melt (8) is circulated in the heat transfer space (9), characterized in that water (10) is added to the substantially anhydrous liquefied salt melt (8), obtaining a water-salt mixture (11), while cooling the tubular reactor (1) to a temperature below the solidification temperature of the substantially anhydrous liquefied salt melt (8), such that the water-salt mixture (11) is kept in a liquefied state during the whole cooling step of the tubular reactor (1).

公开(公告)号：US11964937B2

公开(公告)日：2024-04-23

申请号：US16959647

申请日：2019-01-17

Applicant: Shanghai Huayi New Material Co., Ltd.

Inventor： Xin Wen ,  Ge Luo ,  Xinlei Jin ,  Tonghao Wu ,  Yan Zhuang ,  Zhigang Qian ,  Xiaodong Chu

IPC: C07C51/25 ,  B01J21/06 ,  B01J21/18 ,  B01J27/199 ,  B01J35/00 ,  B01J35/06 ,  B01J37/00 ,  B01J37/04 ,  B01J37/08

CPC classification number: C07C51/252 ,  B01J21/063 ,  B01J21/18 ,  B01J27/199 ,  B01J35/0013 ,  B01J35/06 ,  B01J37/0009 ,  B01J37/04 ,  B01J37/088

Abstract: A (methyl)acrolein oxidation catalyst and a preparation method therefor-in which the catalyst has a composition represented by the following formula: x(Mo12PaCsbVcDeOf)+tC/yZ in which Mo12PaCSbVcDeOf is a heteropolyacid salt main catalyst; C is a nano carbon fiber additive, and Z is a carrier thermal conduction diluent; Mo, P, Cs, V, and O represent the elements of molybdenum, phosphorus, cesium, vanadium, and oxygen, respectively; D represents at least one element selected from the group consisting of copper, iron, magnesium, manganese, antimony, zinc, tungsten, silicon, nickel, and palladium; a, b, c, e, and f represent the atomic ratio of each element, a=0.1-3, b=0.01-3, c=0.01-5, e=0.01-2, and f being the atomic ratio of oxygen required to satisfy the valence of each of the described components; x and y represent the weights of the main catalyst and the carrier thermal conduction diluent Z, and y/x=11.1-50%; and t represents the weight of the nano carbon fiber, and t/x=3-10%.

公开(公告)号：US20230124059A1

公开(公告)日：2023-04-20

申请号：US17907721

申请日：2021-03-25

Applicant: Röhm GmbH

Inventor： Steffen KRILL ,  Jalyn Deng ,  Markus Maier

IPC: C07C51/25

Abstract: An improved process can be used for the production of methacrylates, in particular methacrylic acid and/or methyl methacrylate (MMA). Specific embodiments of this process can be used for the safe and efficient production of these products from C-4-based raw materials, in particular those based on isobutylene or tort-butanol as raw materials. With this novel process, it is possible to operate such processes for a longer period of time without any safety or cleaning related shutdowns. This makes it possible to carry out such processes as simple, economic, and environmentally friendly as possible.

公开(公告)号：US20220315517A1

公开(公告)日：2022-10-06

申请号：US17642248

申请日：2020-09-14

Applicant: DEMETA ,  UNIVERSITE DE RENNES 1

Inventor： CORENTIN BORDIER ,  VINCENT ESCANDE ,  CHRISTOPHE DARCEL ,  FRÉDÉRIC CAIJO

IPC: C07C51/25 ,  B01J31/02

Abstract: The present invention relates to a method for oxidative cleavage of a substrate consisting of at least one functionalised or non-functionalised linear olefin, in particular a mono- or polyunsaturated aliphatic carboxylic acid, or one of the esters thereof, or at least one non-functionalised cyclic olefin, using hydrogen peroxide, in the presence of a metal catalyst which consists of at least one onium halooxodiperoxometallate. It also relates to a novel catalyst consisting of a specific onium halooxodiperoxometallate which can be used, in particular, in said method.

公开(公告)号：US20220305481A1

公开(公告)日：2022-09-29

申请号：US17831711

申请日：2022-06-03

Applicant: Mitsubishi Chemical Corporation

Inventor： Yuki Kato ,  Masahide Kondo

IPC: B01J37/03 ,  B01J37/04 ,  B01J35/02 ,  B01J27/199 ,  C07C51/25 ,  C07C67/08

Abstract: The present invention provides a production method which is capable of stably producing a catalyst that enables a production of methacrylic acid with high selectivity. A method of producing a catalyst used for a production of methacrylic acid includes (i) preparing a slurry A1 containing a heteropolyacid containing at least phosphorus and molybdenum or a salt of the heteropolyacid containing at least phosphorus and molybdenum, (ii) preparing a slurry A2 satisfying the following Formula (I) and Formula (II) using the slurry A1, (iii) mixing the slurry A2 and a raw material liquid B containing a cationic raw material to prepare a slurry C, and (iv) drying the slurry C, αA2/αA1≤0.95 (I), 2≤DA2≤50 (II), wherein, in Formula (I), αA1 represents a half-value width (μm) of a particle size distribution of the slurry A1, αA2 represents a half-value width (μm) of a particle size distribution of the slurry A2, and in Formula (II), DA2 represents a median diameter (μm) of the particle size distribution of the slurry A2.

公开(公告)号：US20220289658A1

公开(公告)日：2022-09-15

申请号：US17805074

申请日：2022-06-02

Applicant: Mitsubishi Chemical Corporation

Inventor： Yasushi OGAWA ,  Yoshimune ABE ,  Takuya NAKAMURA

IPC: C07C51/25 ,  C07C45/34 ,  B01J23/28 ,  B01J8/06

Abstract: A method for producing (meth)acrolein by vapor-phase catalytic oxidation of propylene or isobutylene in a multitubular reactor including a plurality of reaction tubes, the reaction tubes each including a reaction zone filled with a catalyst including molybdenum oxide and a cooling zone filled with an inert substance, wherein a temperature of a heat medium that flows outside the cooling zone is lower than a temperature of a heat medium that flows outside the reaction zone, and wherein the inert substance includes an inert substance having a major-axis length that is equal to or more than 1.7 times a major-axis length of the catalyst. A method for producing (meth)acrylic acid in which (meth)acrolein thus produced is converted to (meth)acrylic acid by vapor-phase catalytic oxidation.

公开(公告)号：US11406968B2

公开(公告)日：2022-08-09

申请号：US16303567

申请日：2017-05-24

Applicant: CATALISI INNOVATIVA PER IL RICICLO DEL CARBONIO E BIOPOLIMERI SRL ,  NOVAMONT S.P.A.

Inventor： Michele Aresta ,  Angela Dibenedetto ,  Daniele Cornacchia

IPC: B01J23/847 ,  B01J23/00 ,  B01J23/648 ,  B01J37/00 ,  B01J37/08 ,  C07C51/25 ,  C07C67/303 ,  C11C3/00

Abstract: This invention relates to the synthesis of new catalysts based on earth crust abundant mixed oxides that can produce cleavage of fatty acids (FA), FA methyl esters, or even lipids in a single step using oxygen as oxidant in solventless conditions.

公开(公告)号：US11033891B2

公开(公告)日：2021-06-15

申请号：US16256323

申请日：2019-01-24

Applicant: Mitsubishi Chemical Corporation

Inventor： Kazuharu Tazawa ,  Yoshimune Abe ,  Mitsunobu Ito

IPC: C07C51/25 ,  B01J35/02 ,  B01J23/843 ,  B01J37/00 ,  B01J23/00 ,  C07C57/04

Abstract: An object of the present invention is to provide a catalyst ensuring that in the case of causing gas-phase catalytic oxidation of an unsaturated aldehyde and an oxygen-containing gas with use of the catalyst to produce a corresponding unsaturated carboxylic acid, the pressure loss can be kept low and an unsaturated carboxylic acid can be produced with high selectivity. The present invention relates to a ring-shaped or columnar catalyst, which is used at the time of producing a corresponding unsaturated carboxylic acid by causing gas-phase catalytic oxidation of an unsaturated aldehyde and an oxygen-containing gas, wherein the outer peripheral edge part is inclined relative to the center line.

公开(公告)号：US10815182B2

公开(公告)日：2020-10-27

申请号：US16499887

申请日：2018-04-03

Applicant: Arkema France

Inventor： Michel Jean Fauconet ,  Serge Tretjak

IPC: C07C51/44 ,  B01D3/14 ,  B01D3/34 ,  B01D9/00 ,  C07C51/215 ,  C07C51/25 ,  C07C51/21

Abstract: The invention relates to the use of a column with a separating wall as a purification/finishing column in a (meth)acrylic acid recovery method based on the use of two distillation columns in the absence of external organic solvent. The method according to the invention improves the energy balance for the method while improving the technical quality of the (meth)acrylic acid recovered. The method according to the invention further produces polymer-grade (or glacial) (meth)acrylic acid compatible with the production of high-molecular weight acrylic acid polymers.