公开(公告)号：US20230095681A1

公开(公告)日：2023-03-30

申请号：US17934099

申请日：2022-09-21

申请人： JAEWON INDUSTRIAL CO., LTD

发明人： Sung Won SHIM ,  Byung Ki SON ,  Hwan CHOI ,  Youn Soo SHIN ,  Hwa Yeong CHOI ,  Ho JEONG

IPC分类号： C07C67/56 ,  C07C67/54 ,  G03F7/16

摘要： Provided is a method for purifying an alkylene glycol monoalkyl ether carboxylic acid ester (AGAECE) for photoresist processing, wherein the method comprises the step of distillation after passing industrial AGAECE through a porous adsorbent impregnated with a basic material, and it is possible to obtain a semiconductor-grade high-purity AGAECE maintaining a low acid value and high purity according to the present invention.

公开(公告)号：US11597696B2

公开(公告)日：2023-03-07

申请号：US17268270

申请日：2018-09-25

申请人： Central Glass Company, Limited

发明人： Satoru Miyazawa ,  Yusuke Kuramoto ,  Asuka Sano ,  Ryo Nadano ,  Shinya Akiba ,  Makoto Kobayashi

IPC分类号： C07C67/54 ,  C07C67/62 ,  C08F20/24

摘要： The present invention is directed to a purification method for purifying a fluorine-containing polymerizable monomer of the formula (1), in which the fluorine-containing polymerizable monomer is purified by distillation in the coexistence of a phenolic compound A such as 6-tert-butyl-2,4-xylenol and a phenolic compound B such as 2,2′-methylene-bis(4-methyl-6-tert-butylphenol). By the combined use of the phenolic compound A and the phenolic compound B, it is possible to significantly suppress polymerization or oligomerization of the fluorine-containing polymerizable monomer even during industrial-production-scale distillation and efficiently purify the fluorine-containing polymerizable monomer by distillation.

公开(公告)号：US11560350B2

公开(公告)日：2023-01-24

申请号：US17754076

申请日：2020-09-15

申请人： Röhm GmbH

发明人： Florian Zschunke ,  Belaid Ait Aissa ,  Andreas Rühling ,  Gerhard Kölbl ,  Steffen Krill ,  Daniel Helmut König

IPC分类号： C07C67/39 ,  C07C67/54

摘要： A process for producing alkyl methacrylates, in particular methyl methacrylate (MMA), includes production of methacrolein (MAL) in a first reaction stage; direct oxidative esterification (DOE) of the methacrolein with an alcohol, preferably methanol, to afford an alkyl methacrylate in a second reaction stage; and workup of the alkyl methacrylate crude product from the second reaction stage. An optimized workup of the reactor output from the oxidative esterification of methacrolein involves minimizing the amount of employed water, the amount of employed acid, and/or the amount of aqueous waste streams, through an optimized recycling of the generated process water streams.

公开(公告)号：US20220388942A1

公开(公告)日：2022-12-08

申请号：US17754096

申请日：2020-09-10

申请人： Röhm GmbH

发明人： Steffen Krill ,  Daniel Helmut König ,  Belaid Ait Aissa

IPC分类号： C07C67/54 ,  C07C67/44 ,  C07C67/62 ,  C07C67/60

摘要： A novel process can be used for purifying methyl methacrylate (MMA) contaminated with low-boiling components by distillation, where the process involves producing MMA by oxidative esterification, and a crude product containing methyl propionate (MP), methyl isobutyrate (MIB), and methacrolein (MAL) as low-boiling components. The process is compatible with MMA produced from C2-based methacrolein containing the low-boiling components specified.

公开(公告)号：US11332428B2

公开(公告)日：2022-05-17

申请号：US16270143

申请日：2019-02-07

申请人： CARGILL, INCORPORATED

发明人： Timothy Walter Abraham ,  Ravi R. Gokarn

IPC分类号： C07C67/08 ,  C07C67/03 ,  C07C67/54

摘要： Methods and systems for producing alkyl hydroxyalkanoate from hydroxy carboxylic acid recovery bottoms. The methods generally comprise the steps of obtaining a hydroxy carboxylic acid recovery bottom, adding a mono-alcohol to the hydroxy carboxylic acid recovery bottom to obtain a first mixture, heating the first mixture in the presence of a catalyst to form a reaction product, distilling the reaction product, and recovering an alkyl hydroxyalkanoate fraction.

公开(公告)号：US11319276B2

公开(公告)日：2022-05-03

申请号：US17268465

申请日：2019-08-15

申请人： EVONIK OPERATIONS GMBH

发明人： Marcel Treskow ,  Martin Glock ,  Günther Gräff ,  Thorben Schütz ,  Steffen Krill

IPC分类号： C07C67/26 ,  B01J27/132 ,  B01J27/138 ,  B01J31/02 ,  B01J31/22 ,  C07C67/54

摘要： The invention relates to a method for preparation of diesters from anhydrides of carboxylic acids.

公开(公告)号：US20220009872A1

公开(公告)日：2022-01-13

申请号：US17296083

申请日：2019-11-25

申请人： GS CALTEX CORPORATION

发明人： Kyoung Jun LEE ,  In Chang CHOI ,  Woo Young KIM

IPC分类号： C07C67/08 ,  C07C67/54

摘要： In methods for preparing an alkyl carboxylic acid ester according to embodiments of the present invention, a first reaction product is produced by reaction of a carboxylic acid stream and a first alcohol stream in a preliminary reactor. A second reaction product is produced by at least partially removing alcohol and water from the first reaction product. The second reaction product is esterified by reaction with a second alcohol stream in a main reactor. An alkyl carboxylic acid ester is recovered from the main reactor.

公开(公告)号：US20210395183A1

公开(公告)日：2021-12-23

申请号：US17418439

申请日：2019-12-26

申请人： NISSHIN PHARMA INC.

发明人： Ichiro GOTO ,  Masataka HARATA ,  Shingo NONAKA

IPC分类号： C07C69/587 ,  C07C67/54

摘要： Provided is a high-concentration and high-purity eicosapentaenoic acid-containing composition. A method for producing an eicosapentaenoic acid alkyl ester-containing composition, the method includes: (1) bringing a raw oil that contains an eicosapentaenoic acid alkyl ester into contact with an aqueous solution that contains a silver salt, and then collecting an aqueous layer; (2) adding an organic solvent to the aqueous layer, and then collecting an organic solvent layer; and (3) subjecting the organic solvent layer to vacuum distillation at a temperature of 180 to 188° C. and a tower top vacuum degree of 0.7 Pa or below, to recover the eicosapentaenoic acid alkyl ester from the organic solvent layer.

公开(公告)号：US11186535B2

公开(公告)日：2021-11-30

申请号：US16492852

申请日：2018-01-10

申请人： CJ CHEILJEDANG CORPORATION

发明人： Jieun Kim ,  Changyub Oh ,  Chang Suk Lee ,  Young Lyeol Yang

IPC分类号： C07C67/02 ,  B01J27/02 ,  C07C67/54 ,  C07C67/03 ,  C07C67/08 ,  C07C69/68

摘要： Provided is a method of efficiently preparing alkyl lactate from by-products which are generated during a process of converting lactic acid into lactide, or from poly(lactic acid) (PLA).

公开(公告)号：US11180700B2

公开(公告)日：2021-11-23

申请号：US16875480

申请日：2020-05-15

申请人： Wilmar Trading Pte Ltd.

发明人： Steven A. Cohen ,  Melvin L. Luetkens, Jr. ,  Chander Balakrishnan ,  Robert Snyder

IPC分类号： C10G3/00 ,  C10G45/00 ,  C10G45/58 ,  C10G50/00 ,  C10G65/04 ,  C10L1/02 ,  C10L1/08 ,  C11C3/00 ,  C07C67/03 ,  C07C67/54 ,  C07C6/04 ,  C07C51/09 ,  C07C2/86 ,  C11B3/00 ,  C11C1/08 ,  C10G69/02 ,  C10L1/04

摘要： Methods are provided for refining natural oil feedstocks. The methods comprise reacting the feedstock in the presence of a metathesis catalyst under conditions sufficient to form a metathesized product comprising olefins and esters. In certain embodiments, the methods further comprise separating the olefins from the esters in the metathesized product. In certain embodiments, the methods further comprise hydrogenating the olefins under conditions sufficient to form a fuel composition. In certain embodiments, the methods further comprise transesterifying the esters in the presence of an alcohol to form a transesterified product.