Patents by Inventor Philip M. Colling
Philip M. Colling 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: 6410817Abstract: Ethylene is a commodity chemical used as a reactant in the production of vinyl acetate. Ethylene is relatively expensive thus making its recovery and re-use in the process encouraged. The present invention provides a method for the recovery of ethylene from the inert gas purge stream from the reactor loop in a vapor-phase process for making vinyl acetate. The method of the present invention includes the steps of contacting the inert gas purge stream containing ethylene with acetic acid in an absorption vessel; discharging a stream containing acetic acid and ethylene from one aspect of the absorption vessel; separating the ethylene from the acetic acid in the stream by contacting the stream with ethylene gas in a scrubber column; and recovering ethylene from a top portion of the scrubber column. The method may also include the step of recycling the recovered ethylene to the reactor loop for further use.Type: GrantFiled: June 29, 1999Date of Patent: June 25, 2002Assignee: Celanese International CorporationInventors: Philip M. Colling, Raul A. Hauser Luna
-
Publication number: 20020058849Abstract: Ethylene is a commodity chemical used as a reactant in the production of vinyl acetate. Ethylene is relatively expensive thus making its recovery and re-use in the process encouraged. The present invention provides a method for the recovery of ethylene from the inert gas purge stream from the reactor loop in a vapor-phase process for making vinyl acetate. The method of the present invention includes the steps of contacting the inert gas purge stream containing ethylene with acetic acid in an absorption vessel; discharging a stream containing acetic acid and ethylene from one aspect of the absorption vessel; separating the ethylene from the acetic acid in the stream by contacting the stream with ethylene gas in a scrubber column; and recovering ethylene from a top portion of the scrubber column. The method may also include the step of recycling the recovered ethylene to the reactor loop for further use.Type: ApplicationFiled: June 29, 1999Publication date: May 16, 2002Inventors: PHILIP M. COLLING, RAUL A. HAUSER LUNA
-
Patent number: 6274531Abstract: A catalyst for the production of vinyl acetate by reaction of ethylene, oxygen and acetic acid comprising a porous support on the porous surfaces of which is deposited catalytically effective amounts of metallic palladium and gold, and cupric acetate. Use of this catalyst results in a reaction having a relatively low selectivity to carbon dioxide.Type: GrantFiled: June 23, 1999Date of Patent: August 14, 2001Assignee: Celanese International CorporationInventors: Ioan Nicolau, Jerry A. Broussard, Philip M. Colling
-
Patent number: 6107514Abstract: Synthesying vinyl acetate utilizing a catalyst for the production of vinyl acetate by reaction of ethylene, oxygen and acetic acid comprising a porous support on the porous surfaces of which is deposited metallic copper in a zone surrounded by deposits of catalytically effective amounts of metallic palladium and gold, neither of which is substantially intermingled with said copper.Type: GrantFiled: June 28, 1999Date of Patent: August 22, 2000Assignee: Celanese International CorporationInventors: Ioan Nicolau, Adolfo Aguilo, Philip M. Colling
-
Patent number: 6072078Abstract: A catalyst for the production of vinyl acetate by reaction of ethylene, oxygen and acetic acid as reactants comprising a porous support on the porous surfaces of which is deposited catalytically effective amounts of metallic palladium and gold, copper as the free metal or cupric acetate, and a fourth metal selected from the group consisting of magnesium calcium, barium, and zirconium, as its oxide or mixture of oxide and free metal.Type: GrantFiled: December 12, 1997Date of Patent: June 6, 2000Assignee: Celanese International CorporationInventors: Ioan Nicolau, Philip M. Colling
-
Patent number: 6057260Abstract: A catalyst for the production of vinyl acetate by reaction of ethylene, oxygen and acetic acid as reactants comprising a porous support on the porous surfaces of which is deposited catalytically effective amounts of metallic palladium and gold, copper as the free metal or cupric acetate, and a fourth metal selected from the group consisting of magnesium calcium, barium, and zirconium, as its oxide or mixture of oxide and free metal.Type: GrantFiled: July 12, 1999Date of Patent: May 2, 2000Assignee: Celanese International CorporationInventors: Ioan Nicolau, Philip M. Colling
-
Patent number: 6034030Abstract: A method is provided to manufacture a palladium-gold catalyst by separately impregnating and fixing the palladium and gold and reducing the fixed solids to free metal on a suitable support useful for vinyl acetate manufacture from ethylene and acetic acid.Type: GrantFiled: February 20, 1998Date of Patent: March 7, 2000Assignee: Celanese International CorporationInventors: Ioan Nicolau, Philip M. Colling, Leland R. Johnson, Michael A. Loewenstein
-
Patent number: 6013834Abstract: A process for the production of vinyl acetate (VA) by reaction in the vapor phase of ethylene, oxygen and acetic acid as reactants, comprising passing at a temperature sufficient to initiate the reaction, a feed gas comprising said reactants and continuously or intermittently containing liquid acetic acid and/or non-volatile components, through a filter and distribution bed of inert material having throughout its volume substantial intercommunicating open spaces among the solid portions, and thence through a plurality of tubes each containing a bed of catalyst for the reaction, and withdrawing a product gas comprising VA. The filter and distribution bed acts to filter out the liquid acetic acid and/or non-volatile components and distribute more evenly the feed gas into the tubes.Type: GrantFiled: March 4, 1999Date of Patent: January 11, 2000Assignee: Celanese International CorporationInventor: Philip M. Colling
-
Patent number: 5968869Abstract: A catalyst for the production of vinyl acetate by reaction of ethylene, oxygen and acetic acid comprising a porous support on the porous surfaces of which is deposited metallic copper in a zone surrounded by deposits of catalytically effective amounts of metallic palladium and gold, neither of which is substantially intermingled with said copper. Methods for preparing the catalyst and for synthesizing vinyl acetate utilizing the catalyst are also disclosed.Type: GrantFiled: June 3, 1997Date of Patent: October 19, 1999Assignee: Celanese International CorporationInventors: Ioan Nicolau, Adolfo Aguilo, Philip M. Colling
-
Patent number: 5948724Abstract: A catalyst for the production of vinyl acetate by reaction of ethylene, oxygen and acetic acid comprising a porous support on the porous surfaces of which is deposited catalytically effective amounts of metallic palladium and gold, and cupric acetate. Use of this catalyst results in a reaction having a relatively low selectivity to carbon dioxide.Type: GrantFiled: October 29, 1997Date of Patent: September 7, 1999Assignee: Celanese International CorporationInventors: Ioan Nicolau, Jerry A. Broussard, Philip M. Colling
-
Patent number: 5859287Abstract: A catalyst for the production of vinyl acetate by reaction of ethylene, oxygen and acetic acid as reactants comprising a porous support on the porous surfaces of which is deposited catalytically effective amounts of metallic palladium and gold and a third metal selected from the group consisting of magnesium calcium, barium, zirconium and cerium, as its oxide or mixture of oxide and metal, said catalyst having been prepared by either of two specified methods (A) or (B). Use of the catalyst results in a reaction of relatively high activity and/or low heavy ends selectivity.Type: GrantFiled: October 30, 1997Date of Patent: January 12, 1999Assignee: Celanese International CorporationInventors: Ioan Nicolau, Philip M. Colling
-
Patent number: 5854171Abstract: A catalyst particularly useful in the preparation of unsaturated esters such as the reaction of ethylene, oxygen and acetic acid in a vapor phase to form vinyl acetate. The catalyst comprises a honeycomb carrier coated with silica and containing palladium and gold throughout the silica coat. Such catalysts show reduced pressure drop and a high space time yield for vinyl acetate.Type: GrantFiled: September 19, 1997Date of Patent: December 29, 1998Assignee: Celanese International CorporationInventors: Ioan Nicolau, Philip M. Colling, Leland R. Johnson
-
Patent number: 5731457Abstract: A process is disclosed for the production of vinyl acetate by reaction of ethylene, oxygen and acetic acid as reactants comprising contacting said reactants and a non-halogen containing copper compound with a catalyst comprising a porous support on the porous surfaces of which is deposited catalytically effective amounts of metallic palladium, gold and copper. During the process to prepare vinyl acetate, a stream of alkali metal acetate is preferably passed over the catalyst. The process results in higher vinyl acetate selectivity and productivity due to lower CO.sub.2 selectivity during the life of the catalyst, and/or longer catalyst life.Type: GrantFiled: June 3, 1997Date of Patent: March 24, 1998Assignee: Hoechst Celanese CorporationInventors: Ioan Nicolau, Jerry A. Broussard, Philip M. Colling
-
Patent number: 5705679Abstract: A catalyst particularly useful in the preparation of unsaturated esters such as the reaction of ethylene, oxygen and acetic acid in a vapor phase to form vinyl acetate. The catalyst comprises a honeycomb carrier coated with silica and containing palladium and gold throughout the silica coat. Such catalysts show reduced pressure drop and a high space time yield for vinyl acetate.Type: GrantFiled: April 2, 1996Date of Patent: January 6, 1998Inventors: Ioan Nicolau, Philip M. Colling, Leland R. Johnson
-
Patent number: 5693586Abstract: This invention provides a supported palladium-gold catalyst for vinyl acetate production from ethylene, acetic acid and oxygen. All of the reactants employed in the catalyst preparation are potassium salt compounds which are essentially sodium-free. A preferred invention palladium-gold catalyst provides exceptional improvement of carbon dioxide selectivity in vinyl acetate production.Type: GrantFiled: June 28, 1996Date of Patent: December 2, 1997Assignee: Hoechst Celanese CorporationInventors: Ioan Nicolau, Philip M. Colling, Leland R. Johnson
-
Patent number: 5332710Abstract: A method of preparing a catalyst particularly useful in the reaction of ethylene, oxygen and acetic acid in the vapor phase to form vinyl acetate comprises impregnating a porous support with water soluble salts of palladium and gold, fixing the palladium and gold on the support as water insoluble compounds by immersing the impregnated support in a reactive solution and tumbling the impregnated support in the reactive solution for at least 1/2 hour to begin precipitation of the insoluble compounds and completing precipitation of the insoluble compounds on the support and reducing the insoluble compounds to free palladium and gold. The catalysts prepared in this manner have been shown to provide improvement with respect to reduced selectivity to CO.sub.2 during the vinyl acetate forming reaction.Type: GrantFiled: October 14, 1992Date of Patent: July 26, 1994Assignee: Hoechst Celanese CorporationInventors: Ioan Nicolau, Philip M. Colling, Leland R. Johnson
-
Patent number: 5314858Abstract: A method of preparing a catalyst particularly useful in the reaction of ethylene, oxygen and acetic acid in the vapor phase to form vinyl acetate comprises impregnating a porous support with water soluble salts of palladium and gold, fixing the palladium and gold on the support as water insoluble compounds by contacting the salt-impregnated support with a reactive solution in two separate fixing stages wherein the treated support is dried and allowed to stand prior to treatment in the second stage to precipitate the insoluble compounds on the support and reducing the insoluble compounds to free palladium and gold. The catalysts prepared in this manner have been shown to provide improvement with respect to reduced selectivity to CO.sub.2 during the vinyl acetate forming reaction.Type: GrantFiled: October 14, 1992Date of Patent: May 24, 1994Assignee: Hoechst Celanese CorporationInventor: Philip M. Colling