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公开(公告)号：US10577305B1
公开(公告)日：2020-03-03
申请号：US16188930
申请日：2018-11-13
Applicant: Eastman Chemical Company
Inventor： Sumit Chakraborty , Steven J. Adams , Robert Thomas Hembre , Scott Donald Barnicki , David Alan Jenkins
Abstract: A process for making methyl esters in high yields. The process comprises contacting aliphatic or aromatic aldehydes and methanol with a homogeneous dimeric ruthenium catalyst, to catalyze the dehydrogenative coupling between aliphatic or aromatic aldehydes and methanol. The reaction is highly selective (
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公开(公告)号：US10544077B2
公开(公告)日：2020-01-28
申请号：US16043329
申请日：2018-07-24
Applicant: Eastman Chemical Company
Inventor： Scott Donald Barnicki , Robert Thomas Hembre , Sumit Chakraborty , Vickie Haygood Osborne , Michael Richard Laningham , Stijn Van de Vyver
Abstract: Disclosed is a process for recovering formic acid from a formate ester that allows for recovery of a formic acid product comprising greater than 75 wt. % formic acid. Disclosed is also a process for producing formic acid by carbonylating a carrier alcohol, hydrolyzing the formate ester of the carrier alcohol, and recovering a formic acid product comprising greater than 70 wt. % formic acid. Discloses are carrier alcohols that enable more favorable hydrolysis equilibriums and/or distillation sequences.
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公开(公告)号：US10266466B2
公开(公告)日：2019-04-23
申请号：US16043317
申请日：2018-07-24
Applicant: Eastman Chemical Company
Inventor： Sumit Chakraborty , Vikram Seshadri , Steven J. Adams , Robert Thomas Hembre , Scott Donald Barnicki
IPC: C07C29/00 , C07F15/00 , B01J31/00 , C07C29/128 , B01J31/24 , C07F15/02 , B01J31/18 , B01J31/20 , C07C29/147 , B01J31/02
Abstract: Iron-based homogeneous catalysts, supported by pincer ligands, are employed in the transfer hydrogenation of esters using C2-C12 alcohols as sacrificial hydrogen donors to produce corresponding alcohols from the esters. No external H2 pressure is required. The reaction can be carried out under ambient pressure.
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4.发明申请公开(公告)号：US20190039978A1
公开(公告)日：2019-02-07
申请号：US16043320
申请日：2018-07-24
Applicant: Eastman Chemical Company
Inventor： Sumit Chakraborty , Robert Thomas Hembre
IPC: C07C29/128 , C07F15/02 , B01J31/24
Abstract: A transfer hydrogenation process for forming vicinal diols by hydrogenating 1,2-dioxygenated organic compounds using alcohols as the reducing agent instead of the traditional H2 gas. The transfer hydrogenation is carried out under milder conditions of temperature and pressure than is typical for ester hydrogenation with H2. The milder conditions of operation provide benefits, such as lower operating and capital costs for industrial scale production as well as savings in product purification due to the avoidance of by-products from exposure of reaction mixtures and products to high temperatures.
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公开(公告)号：US10829429B2
公开(公告)日：2020-11-10
申请号：US16188958
申请日：2018-11-13
Applicant: Eastman Chemical Company
Inventor： Sumit Chakraborty , Steven J. Adams , Robert Thomas Hembre , Scott Donald Barnicki , David Alan Jenkins
IPC: C07C67/03 , B01J27/232 , B01J31/02 , C07C69/708
Abstract: A process for the transesterification of methyl-2-ethylhexanoate with triethylene glycol to produce triethylene glycol di-2-ethylhexanoate is provided. In the process, methyl-2-ethylhexanoate is combined with triethylene glycol to form a first mixture. The first mixture is heated in the presence of a catalyst to form a second mixture comprising methanol and triethylene glycol di-2-ethylhexanoate. Methanol is separated from the second mixture to yield triethylene glycol di-2-ethylhexanoate. Na2CO3, Cs2CO3, K2CO3, Rb2CO3, sodium methoxide or titanium isopropoxide are suitable catalysts.
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Patent Agency Ranking
公开(公告)号：US20200148619A1
公开(公告)日：2020-05-14
申请号：US16188958
申请日：2018-11-13
Applicant: Eastman Chemical Company
Inventor： Sumit Chakraborty , Steven J. Adams , Robert Thomas Hembre , Scott Donald Barnicki , David Alan Jenkins
IPC: C07C67/03 , B01J31/02 , B01J27/232
Abstract: A process for the transesterification of methyl-2-ethylhexanoate with triethylene glycol to produce triethylene glycol di-2-ethylhexanoate is provided. In the process, methyl-2-ethylhexanoate is combined with triethylene glycol to form a first mixture. The first mixture is heated in the presence of a catalyst to form a second mixture comprising methanol and triethylene glycol di-2-ethylhexanoate. Methanol is separated from the second mixture to yield triethylene glycol di-2-ethylhexanoate. Na2CO3, Cs2CO3, K2CO3, Rb2CO3, sodium methoxide or titanium isopropoxide are suitable catalysts.
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公开(公告)号：US10590062B1
公开(公告)日：2020-03-17
申请号：US16188976
申请日：2018-11-13
Applicant: Eastman Chemical Company
Inventor： Sumit Chakraborty , Steven J. Adams , Robert Thomas Hembre , Leslie Sharon Depew
IPC: C07C67/39 , C07C67/44 , B01J31/22 , C07C69/003 , C07C69/013
Abstract: A process for making methyl esters in high yields is provided. The process comprises contacting aliphatic or aromatic aldehydes and methanol with an iron catalyst, to catalyze the dehydrogenative coupling between aliphatic or aromatic aldehydes and methanol. The reaction is highly selective (
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公开(公告)号：US10435349B2
公开(公告)日：2019-10-08
申请号：US16043308
申请日：2018-07-24
Applicant: Eastman Chemical Company
Inventor： Sumit Chakraborty , Steven J. Adams , Robert Thomas Hembre , Scott Donald Barnicki , Michael Richard Laningham , Gerarld Wayne Ollis , Randy Lynn Jennings
IPC: C07C69/013 , C07C69/003 , C07C67/00 , C07F17/00 , C07F15/00 , B01J31/24 , C07F15/02 , B01J31/18 , B01J31/20
Abstract: A process for preparing a variety of secondary and tertiary alkyl formate esters via the coupling of methanol and secondary (or tertiary) alcohols. Iron-based catalysts, supported by pincer ligands, are employed to produce these formate esters in high yields and unprecedentedly high selectivities (>99%). Remarkably, the coupling strategy is also applicable to bulkier tertiary alcohols, which afford corresponding tertiary formate esters in moderately high yields and high selectivities.
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公开(公告)号：US10011485B2
公开(公告)日：2018-07-03
申请号：US15440056
申请日：2017-02-23
Applicant: EASTMAN CHEMICAL COMPANY
Inventor： Scott Donald Barnicki , Robert Thomas Hembre , Elaine Beatrice MacKenzie , Joy Lynn Laningham , Michael Richard Laningham , Shane Kipley Kirk , Larry Wayne Blair , Sumit Chakraborty , Venkateswarlu Bhamidi , Guoxiong Hua , John Derek Woollins
IPC: C01B17/02 , C01B17/12 , C07D341/00
CPC classification number: C01B17/0253 , C01B17/0243 , C01B17/12 , C07D341/00
Abstract: The present invention relates to a method for the manufacture of cyclododecasulfur, a cyclic sulfur allotrope wherein the number of sulfur (S) atoms in the allotrope's homocyclic ring is 12. The method includes reacting a metallasulfur derivative with an oxidizing agent in a reaction zone to form a cyclododecasulfur-containing reaction mixture.
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公开(公告)号：US11827595B2
公开(公告)日：2023-11-28
申请号：US17309384
申请日：2019-11-12
Applicant: Eastman Chemical Company
Inventor： William Christopher Ketchie , Sumit Chakraborty , Leslie Sharon Depew
Abstract: A process for direct esterification of an alkyl aldehyde with an alkyl alcohol to produce an alkyl ester is disclosed. The process comprises reacting an alkyl aldehyde with an alkyl alcohol in the presence of an Au/TiOa catalyst, a base and an enal or oxygen to form an ester and an aldehyde. The process avoids liberation of water and avoids the step of oxidation of the alkyl aldehyde to an alkyl acid.
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