Patents by Inventor Albert C. Tsang
Albert C. Tsang 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).
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Patent number: 8252073Abstract: A novel tar-free gasification process and system is disclosed that involves the partial combustion of recycled dry solids and the drying of a slurry feedstock comprising carbonaceous material in two separate reactor zones in a two stage gasifier, thereby producing mixture products comprising synthesis gas. The synthesis gas produced from the high temperature first stage reaction zone is then quenched in the second stage reaction zone of the gasifier prior to introduction of a slurry feedstock. The temperature of the final syngas exiting the second stage reaction zone of the gasifier is thereby moderated to be in the range of about 350-900° F., which is below the temperature range at which tar is readily formed, depending upon the type of carbonaceous feedstock utilized.Type: GrantFiled: December 10, 2009Date of Patent: August 28, 2012Assignee: Phillips 66 CompanyInventors: Albert C. Tsang, David L. Breton
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Publication number: 20120065059Abstract: A catalyst comprising of NiO; Al2O3; and ZnO. The catalyst is capable of greater than 5% sulfur removal from a synthesis gas at a temperature range from 300° C. to 600° C.Type: ApplicationFiled: September 13, 2011Publication date: March 15, 2012Applicant: CONOCOPHILLIPS COMPANYInventors: Sourabh S. Pansare, Joe D. Allison, Steven E. Lusk, Albert C. Tsang
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Patent number: 8088188Abstract: A system and process for gasifying carbonaceous feedstock with staged slurry addition in order to prevent the formation of tar that causes deposition problems. Dry solid carbonaceous material is partially combusted, then pyrolyzed along with a first slurry stream comprising carbonaceous material in two separate reactor sections, thereby producing mixture products comprising synthesis gas. The second slurry stream comprising particulate carbonaceous material is fed to a drying unit downstream of a heat recovery zone along with the mixture product exiting the heat recovery zone The resulting final temperature of the second stage mixture products and dried particulate carbonaceous material is between 450° F. and 550° F., a temperature range that is typically not conducive to the emission of heavy molecular-weight tar species.Type: GrantFiled: April 1, 2011Date of Patent: January 3, 2012Assignee: ConocoPhillips CompanyInventors: David L. Breton, Albert C. Tsang, Max W. Thompson
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Publication number: 20110182778Abstract: A system and process for gasifying carbonaceous feedstock with staged slurry addition in order to prevent the formation of tar that causes deposition problems. Dry solid carbonaceous material is partially combusted, then pyrolysed along with a first slurry stream comprising carbonaceous material in two separate reactor sections, thereby producing mixture products comprising synthesis gas. The second slurry stream comprising particulate carbonaceous material is fed to a drying unit downstream of a heat recovery zone along with the mixture product exiting the heat recovery zone The resulting final temperature of the second stage mixture products and dried particulate carbonaceous material is between 450° F. and 550° F., a temperature range that is typically not conducive to the emission of heavy molecular-weight tar species.Type: ApplicationFiled: April 1, 2011Publication date: July 28, 2011Applicant: CONOCOPHILLIPS COMPANYInventors: David L. BRETON, Albert C. TSANG, Max W. THOMPSON
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Patent number: 7959829Abstract: A system and process for gasifying carbonaceous feedstock with staged slurry addition in order to prevent the formation of tar that causes deposition problems. Dry solid carbonaceous material is partially combusted, then pyrolyzed along with a first slurry stream comprising carbonaceous material in two separate reactor sections, thereby producing mixture products comprising synthesis gas. The second slurry stream comprising particulate carbonaceous material is fed to a drying unit downstream of a heat recovery zone along with the mixture product exiting the heat recovery zone. The resulting final temperature of the second stage mixture products and dried particulate carbonaceous material is between 450° F. and 550° F., a temperature range that is typically not conducive to the emission of heavy molecular-weight tar species.Type: GrantFiled: December 17, 2009Date of Patent: June 14, 2011Assignee: ConocoPhillips CompanyInventors: David L. Breton, Albert C. Tsang, Max W. Thompson
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Publication number: 20100181537Abstract: The current invention discloses a novel process and system to improve the quality of the slag product from a gasification process, thereby producing low-carbon marketable aggregate product. The inventive processes and systems employ a hindered-bed settler in conjunction with optional disengager and de-watering devices. A slag slurry stream from a gasification process is de-watered and the solids content is increased from less than 5% to greater than 30% via the de-waterer before being conveyed to a hindered-bed settler, wherein the carbon content is reduced from as much as 70% to less than 5%. Particles with a high carbon content are conveyed to a gravity settler, whereby they are concentrated and then recycled to the gasification reactor.Type: ApplicationFiled: January 5, 2010Publication date: July 22, 2010Applicant: CONOCOPHILLIPS COMPANYInventors: Albert C. TSANG, Max W. THOMPSON, Rick Quay HONAKER
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Publication number: 20100155669Abstract: A novel tar-free gasification process and system is disclosed that involves the partial combustion of recycled dry solids and the drying of a slurry feedstock comprising carbonaceous material in two separate reactor zones in a two stage gasifier, thereby producing mixture products comprising synthesis gas. The synthesis gas produced from the high temperature first stage reaction zone is then quenched in the second stage reaction zone of the gasifier prior to introduction of a slurry feedstock. The temperature of the final syngas exiting the second stage reaction zone of the gasifier is thereby moderated to be in the range of about 350-900° F., which is below the temperature range at which tar is readily formed, depending upon the type of carbonaceous feedstock utilized.Type: ApplicationFiled: December 10, 2009Publication date: June 24, 2010Applicant: CONOCOPHILLIPS COMPANYInventors: Albert C. Tsang, David L. Breton
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Publication number: 20100148122Abstract: A system and process for gasifying carbonaceous feedstock with staged slurry addition in order to prevent the formation of tar that causes deposition problems. Dry solid carbonaceous material is partially combusted, then pyrolysed along with a first slurry stream comprising carbonaceous material in two separate reactor sections, thereby producing mixture products comprising synthesis gas. The second slurry stream comprising particulate carbonaceous material is fed to a drying unit downstream of a heat recovery zone along with the mixture product exiting the heat recovery zone. The resulting final temperature of the second stage mixture products and dried particulate carbonaceous material is between 450° F. and 550° F., a temperature range that is typically not conducive to the emission of heavy molecular-weight tar species.Type: ApplicationFiled: December 17, 2009Publication date: June 17, 2010Applicant: CONOCOPHILLIPS COMPANYInventors: David L. BRETON, Albert C. TSANG, Max W. THOMPSON
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Patent number: 7682424Abstract: A system employing a regenerable zinc-oxide based sorbent to remove one or more contaminants from an incoming gas stream. The contaminant-depleted gas stream can then be used for any subsequent application, while at least a portion of the contaminant-laden sorbent can be regenerated via a step-wise regeneration process. In one embodiment, sorbent regenerated via the step-wise regeneration process can comprise less sorbent-damaging compounds than traditional sorbents exposed to conventional regeneration processes.Type: GrantFiled: January 31, 2008Date of Patent: March 23, 2010Assignee: ConocoPhillips CompanyInventors: Roland Schmidt, Robert W. Morton, Joseph B. Cross, Edward L. Sughrue, II, Albert C. Tsang
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Publication number: 20100037518Abstract: The present invention relates to a system and process for gasifying feedstock such as carbonaceous materials. The invention includes partial combustion of dry solids and pyrolysis of carbonaceous material slurry in two separate reactor sections and produce mixture products comprising synthesis gas. The invention employs one or more catalytic or sorbent bed for removing tar from the synthesis gas. The inventive system and process allow a gasification to be carried out under higher slurry feeding rate and lower temperature with the provision to manage the tar being produced, therefore to increase the conversion efficiency of the overall gasification.Type: ApplicationFiled: August 15, 2008Publication date: February 18, 2010Applicant: CONOCOPHILLIPS COMPANYInventors: Albert C. TSANG, Chancelor L. WILLIAMS, Max W. THOMPSON, David L. BRETON
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Publication number: 20090193969Abstract: A system employing a regenerable zinc-oxide based sorbent to remove one or more contaminants from an incoming gas stream. The contaminant-depleted gas stream can then be used for any subsequent application, while at least a portion of the contaminant-laden sorbent can be regenerated via a step-wise regeneration process. In one embodiment, sorbent regenerated via the step-wise regeneration process can comprise less sorbent-damaging compounds than traditional sorbents exposed to conventional regeneration processes.Type: ApplicationFiled: January 31, 2008Publication date: August 6, 2009Applicant: CONOCOPHILLIPS COMPANYInventors: Roland Schmidt, Robert W. Morton, Joseph B. Cross, Edward L. Sughrue, II, Albert C. Tsang
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Patent number: 4556748Abstract: Prepare alkylene glycols by hydrolyzing alkylene carbonates under specific conditions, and a reactor specially designed therefor.Type: GrantFiled: October 31, 1983Date of Patent: December 3, 1985Assignee: The Dow Chemical CompanyInventors: Albert C. Tsang, Thomas L. Holland, Johnny W. Masey
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Patent number: 4537958Abstract: Non-gelling cellulose ethers are purified by mixing same with a dialdehyde under acidic conditions and under high agitation, forming a slurry of the treated cellulose ether, rapidly transferring the slurry to a filter and then dewatering said slurry.Type: GrantFiled: June 29, 1984Date of Patent: August 27, 1985Assignee: The Dow Chemical CompanyInventors: Carl P. Strange, Harold B. Martin, Jr., Albert C. Tsang
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Patent number: 4221727Abstract: In the manufacture of ethylene oxide by the partial oxidation of ethylene in the vapor phase, the effluent gases from the reaction are absorbed in water prior to separation and purification of the ethylene oxide. The present invention is the improvement in which ethylene carbonate is employed as the absorbing medium for the ethylene oxide.Type: GrantFiled: August 17, 1979Date of Patent: September 9, 1980Assignee: The Dow Chemical CompanyInventors: Albert C. Tsang, Oliver C. Ainsworth