-
公开(公告)号：US10392337B2
公开(公告)日：2019-08-27
申请号：US15768027
申请日：2016-09-28
Applicant: Dow Global Technologies LLC
Inventor： Dennis W. Jewell , John G. Pendergast, Jr. , William G. Worley
Abstract: A process for purifying methyl methacrylate. The method comprises: (a) feeding a product mixture comprising methyl methacrylate, methanol, water and oligomers of methyl methacrylate to a divided section of a distillation column comprising a dividing wall; (b) removing an overhead stream and a bottoms stream from the distillation column, and removing a middle side draw stream from the distillation column; wherein the crude product enters the dividing wall distillation column in a divided section on an opposing side of the dividing wall from the middle side draw stream; and (c) removing an upper side draw stream from a point above the dividing wall and below the top of the distillation column, separating a portion of water from the upper side draw stream to produce a dewatered upper side draw stream and returning the dewatered upper side draw stream to the distillation column.
-
公开(公告)号：US10329399B2
公开(公告)日：2019-06-25
申请号：US15535801
申请日：2015-11-09
Applicant: DOW GLOBAL TECHNOLOGIES LLC
Inventor： John G. Pendergast, Jr. , Johnny W. Masey , Robert D. Swindoll , Yujun Liu
Abstract: Disclosed herein is a system for recovering olefins from a vent stream comprising an absorber; and a stripper; where the absorber and the stripper are in a recycle loop; and where the absorber is operative to treat a vent stream with a solvent to remove more than 99 wt % of a halogenated by-product contained in the vent stream and to recover 90 to 95 wt % of olefin molecules present in the vent stream; and where the stripper is operative to remove more than 99 wt % of the halogenated by-products present in the solvent; and where the solvent is recycled to the absorber.
-
公开(公告)号：US20180297930A1
公开(公告)日：2018-10-18
申请号：US15768027
申请日：2016-09-28
Applicant: Dow Global Technologies LLC
Inventor： Dennis W. Jewell , John G. Pendergast, Jr. , William G. Worley
CPC classification number: C07C67/54 , B01D3/06 , B01D3/14 , B01D3/141 , C07C51/44 , C07C51/445 , C07C57/04 , C07C69/54
Abstract: A process for purifying methyl methacrylate. The method comprises: (a) feeding a product mixture comprising methyl methacrylate, methanol, water and oligomers of methyl methacrylate to a divided section of a distillation column comprising a dividing wall; (b) removing an overhead stream and a bottoms stream from the distillation column, and removing a middle side draw stream from the distillation column; wherein the crude product enters the dividing wall distillation column in a divided section on an opposing side of the dividing wall from the middle side draw stream; and (c) removing an upper side draw stream from a point above the dividing wall and below the top of the distillation column, separating a portion of water from the upper side draw stream to produce a dewatered upper side draw stream and returning the dewatered upper side draw stream to the distillation column.
-
公开(公告)号：US09617200B2
公开(公告)日：2017-04-11
申请号：US14781627
申请日：2014-04-02
Applicant: Dow Global Technologies LLC , Rohm and Haas Company
Inventor： Bharati D. Chheda , John G. Pendergast, Jr. , Sivam Rangavajjula , Daniel M. Trauth
IPC: C07C209/00 , C07C209/62 , C07C209/44
CPC classification number: C07C209/62 , C07C209/44 , C07C211/07
Abstract: A method for producing an amine. The first step is contacting a cyanide, an acid, water and a substrate compound capable of generating a carbonium ion by reaction with the acid to generate a first reaction intermediate. The second step is contacting the first reaction intermediate with water to form a second reaction intermediate. The third step is removing cyanide present in the second reaction intermediate to a concentration less than 10 ppm. The fourth step is contacting the second reaction intermediate with an alkali metal hydroxide to form the amine.
-
公开(公告)号：US10920013B2
公开(公告)日：2021-02-16
申请号：US16326880
申请日：2017-09-17
Applicant: Dow Global Technologies LLC
Inventor： Nima N. Nikbin , Carlos M. Villa , Maria Jose Nieves Remacha , Irfan Khan , William H. Heath , John G. Pendergast, Jr. , Matthias Schaefer , Anna Forlin
Abstract: Alkylene oxides are polymerized in a tubular reactor. The alkylene oxide is continuously introduced into the tubular reactor through multiple introduction points located along the length of the tubular reactor. Monomer flow rates are increased along the length of the reactor to maintain a nearly constant concentration of unreacted alkylene oxide.
-
Patent Agency Ranking
公开(公告)号：US20190202983A1
公开(公告)日：2019-07-04
申请号：US16326880
申请日：2017-09-17
Applicant: Dow Global Technologies LLC
Inventor： Nima N. Nikbin , Carlos M. Villa , Maria Jose Nieves Remacha , Irfan Khan , William H. Heath , John G. Pendergast, Jr. , Matthias Schaefer , Anna Forlin
CPC classification number: C08G65/2696 , B01J8/0221 , B01J8/0278 , B01J19/2415 , B01J19/242 , B01J19/243 , B01J19/244 , B01J19/2475 , B01J2208/00088 , B01J2208/00212 , B01J2208/0053 , B01J2219/00094 , B01J2219/00164 , B01J2219/182 , B01J2219/1923 , C08G65/2663
Abstract: Alkylene oxides are polymerized in a tubular reactor. The alkylene oxide is continuously introduced into the tubular reactor through multiple introduction points located along the length of the tubular reactor. Monomer flow rates are increased along the length of the reactor to maintain a nearly constant concentration of unreacted alkylene oxide.
-
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.
-
公开(公告)号：US20180046076A1
公开(公告)日：2018-02-15
申请号：US15559564
申请日：2016-02-25
Applicant: Dow Global Technologies LLC
Inventor： Christopher S. Letko , William H. Heath , Nathan Wilmot , Sven Claessens , William L. Heaner, IV , Adam C. Colson , Stephen W. King , John G. Pendergast, Jr.
CPC classification number: G03F7/0037 , B29C64/135 , B29K2033/04 , B29K2063/00 , B29K2075/00 , B29K2105/0002 , B33Y10/00 , B33Y70/00 , B33Y80/00 , C08F290/067 , C08G18/10 , C08G18/246 , C08G18/4866 , C08G18/672 , C08G18/673 , C08G18/7607 , C08G18/7671 , G03F7/031 , C08G18/48 , C08F222/1006
Abstract: A three-dimensional printing photocurable composition includes from 20 wt % to 70 wt % of an urethane acrylate component, from 20 wt % to 60 wt % of a multifunctional epoxide component, from 1 wt % to 15 wt % of a monomer component, and from 1 wt % to 8 wt % of a photoinitiator component, based on the total weight of the composition. The urethane acrylate component includes the capping reaction product of an acrylate and an isocyanate terminated prepolymer and the isocyanate-terminated prepolymer is the reaction product of a polyisocyanate and at least one polyol having a molecular weight of at least 3000 g/mol. The multifunctional epoxide component includes one or more multifunctional epoxides. The monomer component includes at least one of a multifunctional acrylate monomer and a multifunctional vinyl ether monomer.
-
公开(公告)号：US20170334829A1
公开(公告)日：2017-11-23
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.
-
公开(公告)号：US09403145B2
公开(公告)日：2016-08-02
申请号：US14642704
申请日：2015-03-09
Inventor： Ravindra S. Dixit , Hua Bai , Curtis D. Modtland , Robert A. Ware , John G. Pendergast, Jr. , Christopher P. Christenson , Deodatta Vinayak Shenai-Khatkhate , Artashes Amamchyan , Kenneth M. Crouch , Robert F. Polcari
CPC classification number: B01J19/2405 , B01J2219/00051 , B01J2219/24 , C07B61/00 , C07F5/00 , C07F5/003 , C07F7/003
Abstract: An apparatus for continuously manufacturing organometallic compounds is provided where the apparatus has a source of a first reactant stream wherein the first reactant comprises a metal; a source of a second reactant stream; a laminar flow contacting zone for cocurrently contacting the first reactant stream and the second reactant stream; a mixing zone comprising a turbulence-promoting device; and a heat transfer zone.
Abstract translation: 提供一种用于连续制造有机金属化合物的装置，其中装置具有第一反应物流源，其中第一反应物包含金属; 第二反应物流的来源; 用于使所述第一反应物流和所述第二反应物流并流接触的层流接触区; 混合区，包括湍流促进装置; 和传热区。
-
-
-
-
-
-
-
-
-
Search Results
10
records
(took 0.065 seconds)
