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公开(公告)号：US10597349B2
公开(公告)日：2020-03-24
申请号：US15776847
申请日：2016-12-07
Applicant: Rohm and Haas Company , Dow Global Technologies LLC
Inventor： William G. Worley , Stacy W. Hoy, IV
Abstract: A process for purifying methyl methacrylate by feeding a product mixture comprising methanol, methyl methacrylate and alkali metal salts thereof, methacrolein, water and heavy byproducts to a distillation column having at least 15 trays. The product mixture and a C6-C7 hydrocarbon enter the distillation column above the middle of the distillation column. An overhead stream comprising C6-C7 hydrocarbon, methacrolein, methanol, water and methyl methacrylate and a bottoms stream comprising water, methyl methacrylate and its alkali metal salt and heavy byproducts are removed from the column.
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公开(公告)号：US10144698B2
公开(公告)日：2018-12-04
申请号：US15521798
申请日：2015-10-02
Applicant: DOW GLOBAL TECHNOLOGIES LLC , ROHM AND HAAS COMPANY
Inventor： John G. Pendergast , William G. Worley , Stacy W. Hoy, IV , Jacob M. Crosthwaite
Abstract: A methanol/MMA azeotrope is broken or avoided by a method comprising the steps of (1) raising the pressure within a first vessel, e.g., a distillation column, that contains a methanol/MMA azeotrope, (2) collecting the azeotrope as a liquid, and then in a second, separate vessel, e.g., another distillation column, (3) raising the pressure sufficiently to allow for the breaking of or avoidance of the azeotrope and the recovery of the methanol.
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公开(公告)号：US10294190B2
公开(公告)日：2019-05-21
申请号：US15521421
申请日：2015-10-13
Applicant: Rohm and Haas Company
Inventor： Stacy W. Hoy, IV , Joy L. Mendoza , Mingyu Ye , Philippe P. Maillot
Abstract: Fouling of an MMA process is reduced by strategically removing an aqueous slip stream.
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公开(公告)号：US20180346403A1
公开(公告)日：2018-12-06
申请号：US15776850
申请日：2016-12-08
Applicant: Rohm and Haas Company , Dow Global Technologies LLC
Inventor： William G. Worley , Stacy W. Hoy, IV
Abstract: A process for purifying methyl methacrylate by (a) feeding a mixture comprising methyl methacrylate and its alkali salt into a distillation column above the middle along with a hydrocarbon; (b) removing a first overhead stream; (c) removing a first bottoms stream; (d) feeding the first overhead stream to a first water separator to produce (i) a first organic phase and (ii) a first aqueous phase which enters a methanol drying column which produces a second overhead stream and a second bottoms stream; (e) feeding the first bottoms stream to a second water separator to produce (i) a second aqueous phase which is fed to an MMA stripper column which produces a third overhead stream and a third bottoms stream, and (ii) a second organic phase; (f) combining the second organic phase and the second bottoms stream into a third water separator which produces a third organic phase which enters an MMA drying column which produces a fourth bottoms stream, and (g) feeding the fourth bottoms stream to an MMA product column
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公开(公告)号：US20170298000A1
公开(公告)日：2017-10-19
申请号：US15521421
申请日：2015-10-13
Applicant: Rohm and Haas Company
Inventor： Stacy W. Hoy, IV , Joy L. Mendoza , Mingyu Ye , Philippe P. Maillot
CPC classification number: C07C67/20 , B01D3/4294 , B01J19/1875 , B01J2219/0004 , C07C67/58 , C07C69/54
Abstract: Fouling of an MMA process is reduced by strategically removing an aqueous slip stream.
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Patent Agency Ranking
公开(公告)号：US09932291B2
公开(公告)日：2018-04-03
申请号：US15521440
申请日：2015-10-13
Applicant: Rohm and Haas Company
Inventor： Joy L. Mendoza , Philippe P. Maillot , Mingyu Ye , Stacy W. Hoy, IV
Abstract: Fouling of an MMA process is reduced by acidifying a stream comprising recycled components.
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公开(公告)号：US09765007B2
公开(公告)日：2017-09-19
申请号：US14917114
申请日：2014-09-18
Applicant: Rohm and Haas Company
Inventor： Stacy W. Hoy, IV , Dmitri A. Kraptchetov , Mark A. Silvano
CPC classification number: C07C45/83 , C07C45/505 , C07C45/61 , C07C45/65 , C07C45/80 , C07C45/82 , C07C67/44 , C07C47/22
Abstract: A process for preparing dry methacrolein, and a process for producing methyl methacrylate are disclosed.
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公开(公告)号：US20160229779A1
公开(公告)日：2016-08-11
申请号：US14917114
申请日：2014-09-18
Applicant: ROHM AND HAAS COMPANY
Inventor： Stacy W. Hoy, IV , Dmitri A. Kraptchetov , Mark A. Silvano
CPC classification number: C07C45/83 , C07C45/505 , C07C45/61 , C07C45/65 , C07C45/80 , C07C45/82 , C07C67/44 , C07C47/22
Abstract: A process for preparing dry methacrolein, and a process for producing methyl methacrylate are disclosed.
Abstract translation: 公开了一种制备干甲基丙烯醛的方法和一种生产甲基丙烯酸甲酯的方法。
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公开(公告)号：US20180346402A1
公开(公告)日：2018-12-06
申请号：US15776847
申请日：2016-12-07
Applicant: Rohm and Haas Company , Dow Global Technologies LLC
Inventor： William G. Worley , Stacy W. Hoy, IV
Abstract: A process for purifying methyl methacrylate by feeding a product mixture comprising methanol, methyl methacrylate and alkali metal salts thereof, methacrolein, water and heavy byproducts to a distillation column having at least 15 trays. The product mixture and a C6-C7 hydrocarbon enter the distillation column above the middle of the distillation column. An overhead stream comprising C6-C7 hydrocarbon, methacrolein, methanol, water and methyl methacrylate and a bottoms stream comprising water, methyl methacrylate and its alkali metal salt and heavy byproducts are removed from the column.
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公开(公告)号：US10059651B2
公开(公告)日：2018-08-28
申请号：US15522054
申请日：2015-10-07
Applicant: Dow Global Technologies LLC , Rohm and Haas Company
Inventor： John G. Pendergast, Jr. , Jacinto Lopez-Toledo , William G. Worley , Stacy W. Hoy, IV , Jacob M. Crosthwaite
Abstract: The azeotrope, or near azeotrope, of methanol and MMA is separated via extractive distillation using an extractive distillation solvent comprising cyclohexanone.
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