Patents by Inventor Yaw-Haw Liu
Yaw-Haw Liu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 10413840Abstract: A process directed to acetic acid production comprising providing a feed stream comprising methyl iodide, water, acetic acid, methyl acetate, and at least one PRC to a distillation column comprising a distillation zone and a bottom sump zone and distilling the feed stream at a pressure and a temperature sufficient to produce an overhead stream comprising methyl iodide and at least one PRC, and a residuum stream flowing from the bottom sump zone comprising water and greater than or equal to about 0.11 weight percent HI is disclosed herein.Type: GrantFiled: October 2, 2015Date of Patent: September 17, 2019Assignee: CELANESE INTERNATIONAL COPORATIONInventors: Mark O Scates, Ronald David Shaver, Yaw-Haw Liu
-
Publication number: 20180093198Abstract: A process directed to acetic acid production comprising providing a feed stream comprising methyl iodide, water, acetic acid, methyl acetate, and at least one PRC to a distillation column comprising a distillation zone and a bottom sump zone and distilling the feed stream at a pressure and a temperature sufficient to produce an overhead stream comprising methyl iodide and at least one PRC, and a residuum stream flowing from the bottom sump zone comprising water and greater than or equal to about 0.11 weight percent HI is disclosed herein.Type: ApplicationFiled: October 2, 2015Publication date: April 5, 2018Applicant: CELANESE INTERNATIONAL CORPORATIONInventors: Mark O Scates, RONALD DAVID SHAVER, YAW-HAW LIU
-
Patent number: 9561994Abstract: The disclosure is directed to a carbonylation process for producing acetic acid which includes separating a vapor product stream from a carbonylation reactor to produce a crude acid product comprising acetic acid comprising lithium cations and contacting the crude acetic acid product with a cationic exchanger in the acid form within a first treatment device to produce an intermediate acid product; and contacting the intermediate acetic acid product with a metal-exchanged ion exchange resin having acid cation exchange sites within a second treatment device to produce a purified acetic acid. Embodiments directed to operation of a treatment device comprising a plurality of sampling ports are also disclosed.Type: GrantFiled: October 2, 2015Date of Patent: February 7, 2017Assignee: CELANESE INTERNATIONAL CORPORATIONInventors: Ronald David Shaver, Yaw-Haw Liu, Mark O Scates, Sarah Lane Abrego
-
Patent number: 9512056Abstract: A process directed to acetic acid production comprising providing a feed stream comprising methyl iodide, water, acetic acid, methyl acetate, and at least one PRC to a distillation column comprising a distillation zone and a bottom sump zone and distilling the feed stream at a pressure and a temperature sufficient to produce an overhead stream comprising methyl iodide and at least one PRC, and a residuum stream flowing from the bottom sump zone comprising water and greater than or equal to about 0.11 weight percent HI is disclosed herein.Type: GrantFiled: May 28, 2015Date of Patent: December 6, 2016Assignee: CELANESE INTERNATIONAL CORPORATIONInventors: Mark O Scates, Ronald David Shaver, Yaw-Haw Liu
-
Patent number: 9505695Abstract: A process directed to acetic acid production comprising providing a feed stream comprising methyl iodide, water, acetic acid, methyl acetate, and at least one PRC to a distillation column comprising a distillation zone and a bottom sump zone and distilling the feed stream at a pressure and a temperature sufficient to produce an overhead stream comprising methyl iodide and at least one PRC, and a residuum stream flowing from the bottom sump zone comprising water and greater than or equal to about 0.11 weight percent HI is disclosed herein.Type: GrantFiled: October 2, 2015Date of Patent: November 29, 2016Assignee: CELANESE INTERNATIONAL CORPORATIONInventors: Mark O Scates, Ronald David Shaver, Yaw-Haw Liu
-
Patent number: 9505696Abstract: A process directed to acetic acid production comprising providing a feed stream having a first density comprising water, acetic acid, methyl acetate, at least one PRC, and greater than about 30 wt % methyl iodide to a distillation column comprising a distillation zone and a bottom sump zone; and distilling the feed stream at a pressure and a temperature sufficient to produce an overhead stream having a second density and comprising greater than about 40 wt % methyl iodide and at least one PRC; wherein a percent decrease between the first density and the second density is from 20% to 35%.Type: GrantFiled: October 2, 2015Date of Patent: November 29, 2016Assignee: Celanese International CorporationInventors: Mark O Scates, Ronald David Shaver, Yaw-Haw Liu
-
Patent number: 9487464Abstract: The disclosure is directed to a carbonylation process for producing acetic acid which includes separating a vapor product stream from a carbonylation reactor to produce a crude acid product comprising acetic acid comprising lithium cations and contacting the crude acetic acid product with a cationic exchanger in the acid form within a first treatment device to produce an intermediate acid product; and contacting the intermediate acetic acid product with a metal-exchanged ion exchange resin having acid cation exchange sites within a second treatment device to produce a purified acetic acid. Embodiments directed to a treatment device comprising a plurality of sampling ports having a first open flow path and a second flow path comprising a porous element are disclosed.Type: GrantFiled: October 2, 2015Date of Patent: November 8, 2016Assignee: CELANESE INTERNATIONAL CORPORATIONInventors: Ronald David Shaver, Yaw-Haw Liu, Mark O Scates, Sarah Lane Abrego
-
Publication number: 20160221910Abstract: The disclosure is directed to a carbonylation process for producing acetic acid which includes separating a vapor product stream from a carbonylation reactor to produce a crude acid product comprising acetic acid comprising lithium cations and contacting the crude acetic acid product with a cationic exchanger in the acid form within a first treatment device to produce an intermediate acid product; and contacting the intermediate acetic acid product with a metal-exchanged ion exchange resin having acid cation exchange sites within a second treatment device to produce a purified acetic acid. Embodiments directed to operation of a treatment device comprising a plurality of sampling ports are also disclosed.Type: ApplicationFiled: October 2, 2015Publication date: August 4, 2016Applicant: CELANESE INTERNATIONAL CORPORATIONInventors: Ronald David SHAVER, Yaw-Haw LIU, Mark O SCATES, Sarah Lane ABREGO
-
Publication number: 20160221918Abstract: A process directed to acetic acid production comprising providing a feed stream comprising methyl iodide, water, acetic acid, methyl acetate, and at least one PRC to a distillation column comprising a distillation zone and a bottom sump zone and distilling the feed stream at a pressure and a temperature sufficient to produce an overhead stream comprising methyl iodide and at least one PRC, and a residuum stream flowing from the bottom sump zone comprising water and greater than or equal to about 0.11 weight percent HI is disclosed herein.Type: ApplicationFiled: October 2, 2015Publication date: August 4, 2016Applicant: CELANESE INTERNATIONAL CORPORATIONInventors: Mark O. Scates, Ronald David Shaver, Yaw-Haw Liu
-
Publication number: 20160221909Abstract: The disclosure is directed to a carbonylation process for producing acetic acid which includes separating a vapor product stream from a carbonylation reactor to produce a crude acid product comprising acetic acid comprising lithium cations and contacting the crude acetic acid product with a cationic exchanger in the acid form within a first treatment device to produce an intermediate acid product; and contacting the intermediate acetic acid product with a metal-exchanged ion exchange resin having acid cation exchange sites within a second treatment device to produce a purified acetic acid. Embodiments directed to a treatment device comprising a plurality of sampling ports having a first open flow path and a second flow path comprising a porous element are disclosed.Type: ApplicationFiled: October 2, 2015Publication date: August 4, 2016Applicant: CELANESE INTERNATIONAL CORPORATIONInventors: Ronald David SHAVER, Yaw-Haw LIU, Mark O SCATES, Sarah Lane ABREGO
-
Publication number: 20160221917Abstract: A process directed to acetic acid production comprising providing a feed stream comprising methyl iodide, water, acetic acid, methyl acetate, and at least one PRC to a distillation column comprising a distillation zone and a bottom sump zone and distilling the feed stream at a pressure and a temperature sufficient to produce an overhead stream comprising methyl iodide and at least one PRC, and a residuum stream flowing from the bottom sump zone comprising water and greater than or equal to about 0.11 weight percent HI is disclosed herein.Type: ApplicationFiled: May 28, 2015Publication date: August 4, 2016Applicant: CELANESE INTERNATIONAL CORPORATIONInventors: Mark O Scates, Ronald David Shaver, Yaw-Haw Liu
-
Publication number: 20160221919Abstract: A process directed to acetic acid production comprising providing a feed stream having a first density comprising water, acetic acid, methyl acetate, at least one PRC, and greater than about 30 wt % methyl iodide to a distillation column comprising a distillation zone and a bottom sump zone; and distilling the feed stream at a pressure and a temperature sufficient to produce an overhead stream having a second density and comprising greater than about 40 wt % methyl iodide and at least one PRC; wherein a percent decrease between the first density and the second density is from 20% to 35%.Type: ApplicationFiled: October 2, 2015Publication date: August 4, 2016Applicant: Celanese International CorporationInventors: Mark O. Scates, Ronald David Shaver, Yaw-Haw Liu
-
Patent number: 9302974Abstract: A process for producing acetic acid is disclosed in which the water concentration is controlled in the side stream between two columns. Controlling the water concentration by a recycle rate of the light liquid phase maintains the hydrogen iodide concentration in the side stream to be up to 50 wppm.Type: GrantFiled: July 1, 2015Date of Patent: April 5, 2016Assignee: CELANESE INTERNATIONAL CORPORATIONInventors: Ronald D. Shaver, Yaw-Haw Liu, Mark O. Scates