Patents Assigned to Celanese International Corporation
  • Patent number: 10961207
    Abstract: A process for producing acesulfame potassium, the process comprising the steps of providing a cyclizing agent composition comprising a cyclizing agent and a solvent and having an initial temperature, cooling the cyclizing agent composition to form a cooled cyclizing agent composition having a cooled temperature less than 35° C., reacting an acetoacetamide salt with the cyclizing agent in the cooled cyclizing agent composition to form a cyclic sulfur trioxide adduct composition comprising cyclic sulfur trioxide adduct; and, forming from the cyclic sulfur trioxide adduct in the cyclic sulfur trioxide adduct composition the finished acesulfame potassium composition comprising non-chlorinated acesulfame potassium and less than 39 wppm 5-chloro-acesulfame potassium. The cooled temperature is at least 2° C. less than the initial temperature.
    Type: Grant
    Filed: August 4, 2020
    Date of Patent: March 30, 2021
    Assignee: Celanese International Corporation
    Inventors: Christoph Mollenkopf, Peter Groer, Arvind Yadav
  • Patent number: 10954203
    Abstract: Compositions and processes for producing high purity acesulfame potassium are described. One process comprises the steps of providing a crude acesulfame potassium composition comprising acesulfame potassium and acetoacetamide, concentrating the crude acesulfame potassium composition to form a water stream and an intermediate acesulfame potassium composition comprising acesulfame potassium and less than 33 wppm acetoacetamide, and separating the intermediate acesulfame potassium composition to form the finished acesulfame potassium composition comprising acesulfame potassium and less than 33 wppm acetoacetamide. The concentrating step is conducted at a temperature below 90° C. and the separating step is conducted at a temperature at or below 35° C.
    Type: Grant
    Filed: August 4, 2020
    Date of Patent: March 23, 2021
    Assignee: Celanese International Corporation
    Inventors: Christoph Mollenkopf, Peter Groer, Arvind Yadav
  • Patent number: 10954204
    Abstract: Compositions and processes for producing high purity acesulfame potassium are described. One process comprises the steps of forming a cyclic sulfur trioxide adduct; hydrolyzing the cyclic sulfur trioxide adduct to form an acesulfame-H composition comprising acesulfame-H; neutralizing the acesulfame-H in the acesulfame-H composition to form a crude acesulfame potassium composition comprising acesulfame potassium and less than 2800 wppm acetoacetamide-N-sulfonic acid, wherein the neutralizing step is conducted or maintained at a pH at or below 11.0; and treating the crude acesulfame potassium composition to form the finished acesulfame potassium composition comprising acesulfame potassium and less than 37 wppm acetoacetamide-N-sulfonic acid.
    Type: Grant
    Filed: August 4, 2020
    Date of Patent: March 23, 2021
    Assignee: Celanese International Corporation
    Inventors: Christoph Mollenkopf, Peter Groer, Arvind Yadav
  • Patent number: 10899696
    Abstract: 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.
    Type: Grant
    Filed: April 23, 2020
    Date of Patent: January 26, 2021
    Assignee: CELANESE INTERNATIONAL CORPORATION
    Inventors: Ronald D. Shaver, Yaw-Hwa Liu, Mark O. Scates
  • Patent number: 10829428
    Abstract: A process for producing acetic acid is disclosed in which the methyl iodide concentration is maintained in the vapor product stream formed in a flashing step. The methyl iodide concentration in the vapor product stream ranges from 24 to less than 36 wt. % methyl iodide, based on the weight of the vapor product stream. In addition, the acetaldehyde concentration is maintained within the range from 0.005 to 1 wt. % in the vapor product stream. The vapor product stream is distilled in a first column to obtain an acetic acid product stream comprising acetic acid and up to 300 wppm hydrogen iodide and/or from 0.1 to 6 wt. % methyl iodide and an overhead stream comprising methyl iodide, water and methyl acetate.
    Type: Grant
    Filed: April 30, 2020
    Date of Patent: November 10, 2020
    Assignee: CELANESE INTERNATIONAL CORPORATION
    Inventors: Ronald D. Shaver, Yaw-Hwa Liu, Mark O. Scates
  • Patent number: 10807935
    Abstract: 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.
    Type: Grant
    Filed: November 2, 2018
    Date of Patent: October 20, 2020
    Assignee: CELANESE INTERNATIONAL CORPORATION
    Inventor: Ronald D. Shaver
  • Patent number: 10781191
    Abstract: Improved processes for producing high purity acesulfame potassium. In one embodiment, the process comprises the steps of contacting a solvent, e.g., dichloromethane, and a cyclizing agent, e.g., sulfur trioxide, to form a cyclizing agent composition and reacting an acetoacetamide salt with the cyclizing agent in the composition to form a cyclic sulfur trioxide adduct. The contact time is less than 60 minutes. The process also comprises forming from the cyclic sulfur trioxide adduct composition a finished acesulfame potassium composition comprising non-chlorinated, e.g., non-chlorinated, acesulfame potassium and less than 35 wppm 5-halo acesulfame potassium, preferably less than 5 wppm.
    Type: Grant
    Filed: November 15, 2019
    Date of Patent: September 22, 2020
    Assignee: Celanese International Corporation
    Inventors: Christoph Mollenkopf, Peter Groer, Arvind Yadav
  • Patent number: 10781190
    Abstract: A process for producing acesulfame potassium, the process comprising the steps of providing a cyclizing agent composition comprising a cyclizing agent and a solvent and having an initial temperature, cooling the cyclizing agent composition to form a cooled cyclizing agent composition having a cooled temperature less than 35° C., reacting an acetoacetamide salt with the cyclizing agent in the cooled cyclizing agent composition to form a cyclic sulfur trioxide adduct composition comprising cyclic sulfur trioxide adduct; and, forming from the cyclic sulfur trioxide adduct in the cyclic sulfur trioxide adduct composition the finished acesulfame potassium composition comprising non-chlorinated acesulfame potassium and less than 39 wppm 5-chloro-acesulfame potassium. The cooled temperature is at least 2° C. less than the initial temperature.
    Type: Grant
    Filed: November 15, 2019
    Date of Patent: September 22, 2020
    Assignee: Celanese International Corporation
    Inventors: Christoph Mollenkopf, Peter Groer, Arvind Yadav
  • Patent number: 10759770
    Abstract: Compositions and processes for producing high purity acesulfame potassium are described. One process comprises the steps of providing a crude acesulfame potassium composition comprising acesulfame potassium and acetoacetamide, concentrating the crude acesulfame potassium composition to form a water stream and an intermediate acesulfame potassium composition comprising acesulfame potassium and less than 33 wppm acetoacetamide, and separating the intermediate acesulfame potassium composition to form the finished acesulfame potassium composition comprising acesulfame potassium and less than 33 wppm acetoacetamide. The concentrating step is conducted at a temperature below 90° C. and the separating step is conducted at a temperature at or below 35° C.
    Type: Grant
    Filed: November 15, 2019
    Date of Patent: September 1, 2020
    Assignee: Celanese International Corporation
    Inventors: Christoph Mollenkopf, Peter Groer, Arvind Yadav
  • Patent number: 10759771
    Abstract: Compositions and processes for producing high purity acesulfame potassium are described. One process comprises the steps of forming a cyclic sulfur trioxide adduct; hydrolyzing the cyclic sulfur trioxide adduct to form an acesulfame-H composition comprising acesulfame-H; neutralizing the acesulfame-H in the acesulfame-H composition to form a crude acesulfame potassium composition comprising acesulfame potassium and less than 2800 wppm acetoacetamide-N-sulfonic acid, wherein the neutralizing step is conducted or maintained at a pH at or below 11.0; and treating the crude acesulfame potassium composition to form the finished acesulfame potassium composition comprising acesulfame potassium and less than 37 wppm acetoacetamide-N-sulfonic acid.
    Type: Grant
    Filed: November 15, 2019
    Date of Patent: September 1, 2020
    Assignee: Celanese International Corporation
    Inventors: Christoph Mollenkopf, Peter Groer, Arvind Yadav
  • Patent number: 10710952
    Abstract: A process for producing acetic acid is disclosed in which the methyl iodide concentration is maintained in the vapor product stream formed in a flashing step. The methyl iodide concentration in the vapor product stream ranges from 24 to less than 36 wt. % methyl iodide, based on the weight of the vapor product stream. In addition, the acetaldehyde concentration is maintained within the range from 0.005 to 1 wt. % in the vapor product stream. The vapor product stream is distilled in a first column to obtain an acetic acid product stream comprising acetic acid and up to 300 wppm hydrogen iodide and/or from 0.1 to 6 wt. % methyl iodide and an overhead stream comprising methyl iodide, water and methyl acetate.
    Type: Grant
    Filed: September 13, 2018
    Date of Patent: July 14, 2020
    Assignee: Celanese International Corporation
    Inventors: Ronald D. Shaver, Yaw-Hwa Liu, Mark O. Scates
  • Patent number: 10689319
    Abstract: 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.
    Type: Grant
    Filed: October 19, 2018
    Date of Patent: June 23, 2020
    Assignee: CELANESE INTERNATIONAL CORPORATION
    Inventors: Ronald D. Shaver, Yaw-Hwa Liu, Mark O. Scates
  • Patent number: 10662273
    Abstract: An aqueous copolymer dispersion is formed by emulsion polymerization of a monomer mixture comprising (a) 20 to 80 wt. % of one or more (meth)acrylic acid esters A, whose homopolymer(s) have a Tg>25° C. and at least one has a biorenewable carbon content of at least 50 wt. % of the total carbon content of the ester; (b) 19 to 79 wt. % of one or more (meth)acrylic acid esters B whose homopolymer(s) have a Tg<25° C.; (c) 0.5 to 10 wt. % of at least one monomer selected from unsaturated sulfonic, phosphoric and phosphonic acids, and unsaturated carboxylic acids, anhydrides and amides thereof; (d) up to 10% by weight of one or more functional monomers selected from hydrolysable silane compounds, epoxy-containing compounds, ureido-containing compounds and carbonyl-containing compounds, and (e) less than 5 wt. % of one or more further monomers, wherein the total percentages of comonomers (a) to (e) equals 100%.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: May 26, 2020
    Assignee: CELANESE INTERNATIONAL CORPORATION
    Inventors: Matthias Junk, Stephan Krieger, Thomas Fichtner
  • Patent number: 10654252
    Abstract: Multi-layer anti-fog compositions comprising an anti-fog layer and a protective layer. The anti-fog layer comprises cellulose acetate and a plasticizer and has opposing major planar surfaces. The protective layer has opposing major planar surfaces that are oriented substantially coplanar, at least in part, to the anti-fog layer that forms a multi-layered structure. The multi-layer anti-fog compositions further comprise one or more connectors, and at least one of the connectors extends through the multi-layered structure.
    Type: Grant
    Filed: May 18, 2017
    Date of Patent: May 19, 2020
    Assignee: CELANESE INTERNATIONAL CORPORATION
    Inventors: Kevin Parker, Joanna Marshall
  • Patent number: 10590095
    Abstract: Compositions and processes for producing high purity acesulfame potassium are described. One process comprises the steps of providing a crude acesulfame potassium composition comprising acesulfame potassium and acetoacetamide, concentrating the crude acesulfame potassium composition to form a water stream and an intermediate acesulfame potassium composition comprising acesulfame potassium and less than 33 wppm acetoacetamide, and separating the intermediate acesulfame potassium composition to form the finished acesulfame potassium composition comprising acesulfame potassium and less than 33 wppm acetoacetamide. The concentrating step is conducted at a temperature below 90° C. and the separating step is conducted at a temperature at or below 35° C.
    Type: Grant
    Filed: February 12, 2019
    Date of Patent: March 17, 2020
    Assignee: Celanese International Corporation
    Inventors: Christoph Mollenkopf, Peter Groer, Arvind Yadav
  • Patent number: 10590098
    Abstract: Improved processes for producing high purity acesulfame potassium. In one embodiment, the process comprises the steps of contacting a solvent, e.g., dichloromethane, and a cyclizing agent, e.g., sulfur trioxide, to form a cyclizing agent composition and reacting an acetoacetamide salt with the cyclizing agent in the composition to form a cyclic sulfur trioxide adduct. The contact time is less than 60 minutes. The process also comprises forming from the cyclic sulfur trioxide adduct composition a finished acesulfame potassium composition comprising non-chlorinated, e.g., non-chlorinated, acesulfame potassium and less than 35 wppm 5-halo acesulfame potassium, preferably less than 5 wppm.
    Type: Grant
    Filed: February 12, 2019
    Date of Patent: March 17, 2020
    Assignee: Celanese International Corporation
    Inventors: Christoph Mollenkopf, Peter Groer, Arvind Yadav
  • Patent number: 10590097
    Abstract: A process for producing acesulfame potassium, the process comprising the steps of providing a cyclizing agent composition comprising a cyclizing agent and a solvent and having an initial temperature, cooling the cyclizing agent composition to form a cooled cyclizing agent composition having a cooled temperature less than 35° C., reacting an acetoacetamide salt with the cyclizing agent in the cooled cyclizing agent composition to form a cyclic sulfur trioxide adduct composition comprising cyclic sulfur trioxide adduct; and, forming from the cyclic sulfur trioxide adduct in the cyclic sulfur trioxide adduct composition the finished acesulfame potassium composition comprising non-chlorinated acesulfame potassium and less than 39 wppm 5-chloro-acesulfame potassium. The cooled temperature is at least 2° C. less than the initial temperature.
    Type: Grant
    Filed: February 12, 2019
    Date of Patent: March 17, 2020
    Assignee: Celanese International Corporation
    Inventors: Christoph Mollenkopf, Peter Groer, Arvind Yadav
  • Patent number: 10526270
    Abstract: A process for producing acetic acid is disclosed in which the recycle ratio of the mass flow of the light liquid phase recycled to the reactor to the mass flow of the aqueous recycle stream recycled to the reactor is less than or equal to 2.
    Type: Grant
    Filed: October 2, 2015
    Date of Patent: January 7, 2020
    Assignee: CELANESE INTERNATIONAL CORPORATION
    Inventors: Ronald D. Shaver, Yaw-Hwa Liu, Mark O. Scates
  • Patent number: 10519089
    Abstract: A carbonylation process for producing acetic acid including: (a) carbonylating methanol or its reactive derivatives in the presence of a Group VIII metal catalyst and methyl iodide promoter to produce a liquid reaction mixture including acetic acid, water, methyl acetate and methyl iodide; (b) feeding the liquid reaction mixture at a feed temperature to a flash vessel which is maintained at a reduced pressure; (c) flashing the reaction mixture to produce a crude product vapor stream.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: December 31, 2019
    Assignee: Celanese International Corporation
    Inventor: Jeremy J. Patt
  • Patent number: 10301772
    Abstract: Disclosed are improved carpet products made using certain types of coating compositions to secure carpet fibers to a carpet backing or substrates and/or to secure one or more carpet scrims or other layers to carpet backing. The coating compositions, which can be in the form of either precoating or skip coating compositions, are made from latex binder emulsions based on interpolymers emulsion polymerized from vinyl esters, ethylene, and a multifunctional cross-linking co-monomer such as an unsaturated silane. Such emulsions are also stabilized with surfactant emulsifiers but are substantially free of protective colloid stabilizers. The multifunctional co-monomer alters interpolymer molecular weight, branching and/or flow properties such that films formed from such interpolymers exhibit relatively low elongation values.
    Type: Grant
    Filed: May 3, 2011
    Date of Patent: May 28, 2019
    Assignee: CELANESE INTERNATIONAL CORPORATION
    Inventors: David J. Lunsford, Rajeev Farwaha, Joerg Ludwig Schulte, Kerstin Gohr