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1. 发明授权

US11685706B2 Process for continuous acetic acid production 有权
公开(公告)号：US11685706B2
公开(公告)日：2023-06-27
申请号：US17021576
申请日：2020-09-15
申请人： CELANESE INTERNATIONAL CORPORATION INC.
发明人： Ronald D. Shaver
IPC分类号： C07C51/12 , C07C51/44 , C07C53/08 , B01J19/00
CPC分类号： C07C51/12 , B01J19/0006 , C07C51/44 , B01J2219/00162 , B01J2219/00164 , C07C53/08
摘要： A process for producing acetic acid that involves operating the flash vessel and first column at the lowest possible pressure for a given production rate is described. Low pressures are achieved by operating on a back pressure established by a vapor discharge from an absorbing system. This reduces the pressure differential to allow steady and efficient acetic acid production.

2. 发明公开

US20230174455A1 RECYCLED CONTENT TRIACETIN 审中-公开
公开(公告)号：US20230174455A1
公开(公告)日：2023-06-08
申请号：US18052270
申请日：2022-11-03
申请人： Eastman Chemical Company
发明人： Kenneth James Flint , Michael Neil Brown , Hannah Grace Moser , Evan Patrick Beaumier
IPC分类号： C07C67/12 , C10J3/84 , C07C29/151 , C07C67/08 , C07C51/56 , C07C51/12
CPC分类号： C07C67/12 , C10J3/84 , C07C29/1518 , C07C67/08 , C07C51/56 , C07C51/12 , C10J2300/0946 , C10J2300/1665
摘要： Recycled content triacetin (r-triacetin) is produced using a process and system that applies physical and/or credit-based recycled content from one or more feed materials to triacetin produced from the feed materials.

3. 发明授权

US11623907B2 Method for directly constructing highly optically active tetrasubstituted allenic acid compounds 有权
公开(公告)号：US11623907B2
公开(公告)日：2023-04-11
申请号：US17299082
申请日：2019-12-04
申请人： FUDAN UNIVERSITY
发明人： Shengming Ma , Weifeng Zheng , Hui Qian
IPC分类号： C07C51/12 , C07B53/00 , C07C51/14
摘要： The present invention discloses a method for directly constructing highly optically active tetrasubstituted allenic acid compounds, i.e., a one-step process for directly constructing highly optically active axially chiral tetrasubstituted allenic acid compounds by using tertiary propargyl alcohol, carbon monoxide and water as reactants in an organic solvent in the presence of palladium catalyst, chiral diphosphine ligand, monophosphine ligand and organic phosphoric acid. The method of the present invention has the following advantages: operations are simple, raw materials and reagents are readily available, the reaction conditions are mild, the substrate has high universality, the functional group has good compatibility, and the reaction has high enantioselectivity (90%˜>99% ee). The highly optically active allenic acid compounds obtained by the present invention can be used as an important intermediate to construct γ-butyrolactone compounds containing tetrasubstituted chiral quaternary carbon centers, tetrasubstituted allenic alcohol and other compounds.

4. 发明申请

US20220226768A1 TWO-STAGE OFFGAS SCRUBBING 有权
公开(公告)号：US20220226768A1
公开(公告)日：2022-07-21
申请号：US17560226
申请日：2021-12-22
申请人： Evonik Operations GmbH
发明人： Stephan Peitz , Guido Stochniol , Martin Oldemeyer , Matthias Böse
IPC分类号： B01D53/14 , C07C51/44 , C07C51/12
摘要： The invention provides a process for removing organic constituents from a gas stream in a two-stage scrubbing operation, in which scrubbing is performed firstly with an alcoholic scrubbing medium and then with an aqueous scrubbing medium. The laden scrubbing media obtained can be used in certain (chemical) processes.

5. 发明申请

US20220162344A1 POLYMERS, ARTICLES, AND CHEMICALS MADE FROM HIGH CONCENTRATED RECYCLE DERIVED SYNGAS 有权
公开(公告)号：US20220162344A1
公开(公告)日：2022-05-26
申请号：US17593861
申请日：2020-03-26
申请人： Eastman Chemical Company
发明人： William Lewis Trapp , Justin William Murphy , Nathan Mitchell West
IPC分类号： C08B3/06 , C01B3/36 , C08L1/12 , C08L1/14 , C10J3/46 , C10J3/78 , C07C29/151 , C07C51/12 , C07C67/08 , C07C51/09 , D01F2/28
摘要： High concentrations of recycle polymer are gasified in a partial oxidation gasifier to make a syngas useful to make a variety of chemicals and polymers, such as cellulose ester. Polymers such as cellulose esters can be made that are obtained from sustainable sources, recycle sources, and are biodegradable. Circularity in the manufacture of textiles and/or plastics made from the fibers of such cellulose esters can now be achieved. The process of making such a syngas from high concentrations of recycle polymer (e.g. textiles and/or plastics) includes campaigning for the production of syngas.

6. 发明授权

US11261149B2 Method for producing acetic acid 有权
公开(公告)号：US11261149B2
公开(公告)日：2022-03-01
申请号：US16482675
申请日：2018-07-02
申请人： DAICEL CORPORATION
发明人： Masahiko Shimizu
IPC分类号： C07C51/12 , C07C51/44 , B01D53/14 , C07C53/08 , C07C51/42
摘要： Provided is an acetic acid production method including an absorption step that enables efficient and energy-saving separation of methyl iodide in a downstream step, when provided, of separating methyl iodide from a solution after the absorption of methyl iodide. The acetic acid production method according to the present invention includes an absorption step in an acetic acid production process. In the absorption step, at least a portion of offgases formed in the process is fed to an absorption column, is brought into contact with an absorbent including an organic acid having a higher boiling point as compared with acetic acid to allow the absorbent to absorb an iodine compound from the offgas, and a gas having a lower iodine compound concentration as compared with the offgas, and a solution containing the absorbent and the iodine compound are thereby to be separated.

7. 发明授权

US11192873B2 Process for the preparation of unsaturated carboxylic acids by carbonylation of allyl alcohols and their acylation products 有权
公开(公告)号：US11192873B2
公开(公告)日：2021-12-07
申请号：US16487161
申请日：2018-02-13
申请人： BASF SE
发明人： Mathias Schelwies , Rocco Paciello , Ralf Pelzer , Wolfgang Siegel
IPC分类号： C07C51/12 , C07C57/02 , C07D307/92
摘要： The present invention relates to a process for carbonylating allyl alcohols at low temperature, low pressure and/or low catalyst loading. In an alternative embodiment, an acylation product of the allyl alcohol is used for the carbonylation. The present invention likewise relates to the preparation of conversion products of these carbonylation products and specifically of (−)-ambrox.

8. 发明申请

US20210108010A1 SYSTEMS AND PROCESSES FOR POLYACRYLIC ACID PRODUCTION 有权
公开(公告)号：US20210108010A1
公开(公告)日：2021-04-15
申请号：US17085525
申请日：2020-10-30
申请人： Novomer, Inc.
发明人： Sadesh H. Sookraj
IPC分类号： C08F20/06 , C07C51/377 , C07C51/12 , C07C51/14 , C07C51/145 , C07C57/04 , C07C59/01 , C08F2/01 , C08F2/18
摘要： Disclosed are systems and methods for the production of polyacrylic acid and superabsorbent polymers from ethylene oxidation to form ethylene oxide. Reacting the ethylene oxide with carbon monoxide to form to beta propiolactone (BPL) or polypropiolactone (PPL), or a combination thereof. An outlet configured to provide a carbonylation stream comprising the BPL or PPL, or a combination thereof and using one or more reactors to convert BPL to acrylic acid or to convert at least some of the BPL to PPL, and then to convert PPL to acrylic acid. An outlet configured to provide a PPL stream to a second reactor tm to convert at least some of the PPL to AA or a third reactor to convert at least some of the PPL to AA. The outlet configured to provide an AA stream to a fourth reactor to convert the AA to polyacrylic acid.

9. 发明授权

US10899696B2 Processes for purifying acetic acid and hydrating anhydride 有权
公开(公告)号：US10899696B2
公开(公告)日：2021-01-26
申请号：US16856748
申请日：2020-04-23
申请人： CELANESE INTERNATIONAL CORPORATION
发明人： Ronald D. Shaver , Yaw-Hwa Liu , Mark O. Scates
IPC分类号： C07C51/44 , C07C51/087 , C07C51/56 , C07C51/47 , C07C51/487 , C07C51/12
摘要： Processes for purifying acetic acid by distilling a process stream in a column in which acetic anhydride is formed in the lower portion of the column. The product stream withdrawn from the column comprises acetic acid, water at a concentration of no more than 0.2 wt. %, and acetic anhydride at a concentration of no more than 600 wppm. The process further comprises hydrating the acetic anhydride in the product stream to form a purified acetic acid product comprising acetic anhydride at a concentration of no more than 50 wppm.

10. 发明授权

US10781155B2 Method for producing acetic acid 有权
公开(公告)号：US10781155B2
公开(公告)日：2020-09-22
申请号：US16071337
申请日：2018-03-27
申请人： DAICEL CORPORATION
发明人： Masahiko Shimizu
IPC分类号： C07C51/12 , C07C51/44 , C07C53/08
摘要： Provided are a method and an acetic acid production method, each of which can effectively restrain or prevent local corrosion of an inner wall of a process unit and/or line and can lower a formic acid concentration in an acetic acid product. The method produces acetic acid by a process including (1) a reaction step and (A) a separation step. In the reaction step (1), methanol is carbonylated with carbon monoxide in the presence of a catalytic system, acetic acid, methyl acetate, and water, where the catalytic system includes a metal catalyst and methyl iodide. In the separation step (A), the reaction mixture resulting from the reaction step is separated, using at least one selected from evaporators and distillation columns, into a stream containing the catalyst, an acetic acid stream rich in acetic acid, and a stream rich in lower-boiling components as compared with the acetic acid stream. In this method, an oxygen concentration is controlled by at least one of (a) controlling the oxygen concentration in a gaseous phase in the process to less than 7 percent by volume, and (b) controlling the oxygen concentration in a liquid phase in the process to less than 7×10−5 g/g. In addition, a formic acid concentration in the liquid phase in the process is controlled to 500 ppm by mass or less. Thus, the formation of at least one of iodine and formic acid is restrained.

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