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公开(公告)号：US20240002324A1
公开(公告)日：2024-01-04
申请号：US18019147
申请日：2021-07-21
Applicant: EASTMAN CHEMICAL COMPANY
Inventor： DAMON RAY BILLODEAUX , KENNETH WAYNE HAMPTON, Jr. , CAREY DAN ASHCROFT
CPC classification number: C07C51/09 , C07C67/38 , B01J31/2409 , B01J31/2226 , B01J31/20 , B01J2531/004 , B01J2531/824 , B01J2531/821 , B01J2231/321
Abstract: Provided is a one-pot process for preparing propionic acid, which comprises (i) treating ethylene with a C1-C6 alkanol, water, and carbon monoxide in the presence of a catalyst system comprising the reaction product of (a) a Group 8 to 10 transition metal compound such as a palladium or ruthenium compound; and (b) an activating anion, at elevated temperature and pressure. The process also provides a facile, continuous process for the preparation of propionic acid via the alkoxycarbonylation of ethylene at elevated temperature and pressure followed by hydrolysis, in one reaction vessel.
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公开(公告)号：US20210380508A1
公开(公告)日：2021-12-09
申请号：US17290901
申请日：2019-10-31
Applicant: EASTMAN CHEMICAL COMPANY
Inventor： ROBERT JACKS SHARPE , SCOTT DONALD BARNICKI , MANIK LAL SAHA , KENNETH WAYNE HAMPTON, Jr. , DAMON RAY BILLODEAUX , ROBERT THOMAS HEMBRE
Abstract: An efficient process useful for the self-condensation of aliphatic aldehydes is provided, catalyzed by dialkylammonium carboxylate salts. In particular, the invention provides a facile method for the preparation of 2-ethyl hexenal via the self-condensation of butyraldehyde using various dialkylammonium carboxylates, e.g., diisopropylammonium acetate or dimethylammonium acetate, as catalyst. Additionally, residual nitrogen arising from the catalyst can be reduced to −100 ppm levels in the product via a simple washing procedure. The invention provides a process for preparing alkenals under conditions which limit the formation of undesired impurities and high-boiling oligomeric substances.
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公开(公告)号：US20220185759A1
公开(公告)日：2022-06-16
申请号：US17441726
申请日：2020-03-25
Applicant: EASTMAN CHEMICAL COMPANY
IPC: C07C51/09
Abstract: Processes are disclosed for preparing carboxylic acids from organic esters, the processes comprising contacting an ester with water in the presence of an acid catalyst and a homogenizing solvent at conditions effective to form a carboxylic acid. The homogenizing solvent is present in an amount sufficient to form a single-phase reaction mixture comprising the ester, water, and homogenizing solvent. The homogenizing solvent may be selected from acetonitrile, dimethyl sulfoxide, and 1,4-dioxane.
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