Patents by Inventor Anurag P. Mairal
Anurag P. Mairal 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: 7946431Abstract: An inorganic membrane suitable for ultrafiltration or nanofiltration, and methods for making and using the membrane. The membrane has a organic polymer deposited on the feed surface, but is not able to perform separations by solution-diffusion.Type: GrantFiled: July 9, 2010Date of Patent: May 24, 2011Assignee: Membrane Technology and Research, Inc.Inventors: Ingo Pinnau, Alvin Ng, Jennifer Ly, Anurag P Mairal
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Publication number: 20110100914Abstract: An inorganic membrane suitable for ultrafiltration or nanofiltration, and methods for making and using the membrane. The membrane has a organic polymer deposited on the feed surface, but is not able to perform separations by solution-diffusion.Type: ApplicationFiled: July 9, 2010Publication date: May 5, 2011Applicant: MEMBRANE TECHNOLOGY AND RESEARCH, INCInventors: Anurag P. Mairal, Jennifer Ly, Alvin Ng, Ingo Pinnau
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Patent number: 7732173Abstract: A process for producing and recovering light alcohols, particularly ethanol, alcohol mixtures containing ethanol, and ABE mixtures (alcohol mixtures containing acetone, butanol and ethanol), using a combination of steps including fermentation, first membrane separation, dephlegmation and dehydration by second membrane separation.Type: GrantFiled: July 28, 2006Date of Patent: June 8, 2010Assignee: Membrane Technology and Research, Inc.Inventors: Anurag P. Mairal, Alvin Ng, Richard W. Baker, Ivy Huang, Jennifer Ly
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Patent number: 7132008Abstract: A process and corresponding apparatus for dehydrating gas, especially natural gas. The process includes an absorption step and a membrane pervaporation step to regenerate the liquid sorbent.Type: GrantFiled: May 6, 2004Date of Patent: November 7, 2006Assignee: Membrane Technology & Research, Inc.Inventors: Johannes G Wijmans, Alvin Ng, Anurag P Mairal
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Patent number: 7018539Abstract: A process and apparatus for treating oily wastewater, such as bilge water or ballast water, generated on a ship. The process uses a combination of a centrifugal separation step and a membrane separation step, such as an ultrafiltration step. The membrane separation step uses a dense, non-porous filtration membrane. The process is able to remove both emulsified oil and dissolved oil from the wastewater to low levels.Type: GrantFiled: October 24, 2002Date of Patent: March 28, 2006Assignee: Membrane Technology and Research, Inc.Inventors: Anurag P. Mairal, Alvin Ng, Johannes G. Wijmans, Ingo Pinnau, Jennifer H. Ly
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Patent number: 6899743Abstract: A process for treating mixtures of organic components, including azeotropic mixtures. The process includes a gas- or liquid-phase membrane separation step in conjunction with a dephlegmation step to treat at least a portion of the permeate vapor from the pervaporation step. The process yields a membrane residue stream, a stream enriched in the more volatile component as the overhead stream from the dephlegmator and a condensate stream enriched in the less volatile component as a bottoms stream from the dephlegmator. Any of these may be the principal product of the process.Type: GrantFiled: June 11, 2003Date of Patent: May 31, 2005Assignee: Membrane Technology and Research, Inc.Inventors: Johannes G. Wijmans, Richard W. Baker, Anurag P. Mairal
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Patent number: 6846909Abstract: A membrane process for treating zein solutions to increase the zein concentration in the solution. The process uses a non-porous membrane that preferentially permeates the solvent and rejects the zein. Optionally, the process can be operated as a diafiltration process to yield a concentrate of high zein purity.Type: GrantFiled: May 14, 2003Date of Patent: January 25, 2005Assignee: Membrane Technology and Research, Inc.Inventors: Anurag P. Mairal, Alvin Ng, Johannes G. Wijmans
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Publication number: 20040230041Abstract: A membrane process for treating zein solutions to increase the zein concentration in the solution. The process uses a non-porous membrane that preferentially permeates the solvent and rejects the zein. Optionally, the process can be operated as a diafiltration process to yield a concentrate of high zein purity.Type: ApplicationFiled: May 14, 2003Publication date: November 18, 2004Applicant: Membrane Technology and Research, Inc.Inventors: Anurag P. Mairal, Alvin Ng, Johannes G. Wijmans
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Publication number: 20040206242Abstract: A process and corresponding apparatus for dehydrating gas, especially natural gas. The process includes an absorption step and a membrane pervaporation step to regenerate the liquid sorbent.Type: ApplicationFiled: May 6, 2004Publication date: October 21, 2004Applicant: Membrane Technology and Research, Inc.Inventors: Johannes G. Wijmans, Alvin Ng, Anurag P. Mairal
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Patent number: 6789288Abstract: A process and corresponding apparatus for dehydrating gas, especially natural gas. The process includes an absorption step and a membrane pervaporation step to regenerate the liquid sorbent.Type: GrantFiled: October 25, 2002Date of Patent: September 14, 2004Assignee: Membrane Technology and Research, Inc.Inventors: Johannes G. Wijmans, Alvin Ng, Anurag P. Mairal
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Patent number: 6755975Abstract: A process for treating liquids containing organic compounds and water. The process includes a pervaporation step in conjunction with a dephlegmation step to treat at least a portion of the permeate vapor from the pervaporation step. The process yields a membrane residue stream, a stream enriched in the more volatile component (usually the organic) as the overhead stream from the dephlegmator and a condensate stream enriched in the less volatile component (usually the water) as a bottoms stream from the dephlegmator. Any of these may be the principal product of the process. The membrane separation step may also be performed in the vapor phase, or by membrane distillation.Type: GrantFiled: June 12, 2002Date of Patent: June 29, 2004Assignees: Membrane Technology and Research, Inc., The United States of America as represented by the Environmental Protection AgencyInventors: Leland M. Vane, Anurag P. Mairal, Alvin Ng, Franklin R. Alvarez, Richard W. Baker
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Publication number: 20040079228Abstract: A process and corresponding apparatus for dehydrating gas, especially natural gas. The process includes an absorption step and a membrane pervaporation step to regenerate the liquid sorbent.Type: ApplicationFiled: October 25, 2002Publication date: April 29, 2004Applicant: Membrane Technology and Research, Inc.Inventors: Johannes G. Wijmans, Alvin Ng, Anurag P. Mairal
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Publication number: 20040079706Abstract: A process and apparatus for treating oily wastewater, such as bilge water or ballast water, generated on a ship. The process uses a combination of a centrifugal separation step and a membrane separation step, such as an ultrafiltration step. The membrane separation step uses a dense, non-porous filtration membrane. The process is able to remove both emulsified oil and dissolved oil from the wastewater to low levels.Type: ApplicationFiled: October 24, 2002Publication date: April 29, 2004Applicant: Membrane Technology and Research, Inc.Inventors: Anurag P. Mairal, Alvin Ng, Johannes G. Wijmans, Ingo Pinnau, Jennifer H. Ly
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Publication number: 20040000521Abstract: A process for treating liquids containing organic compounds and water. The process includes a pervaporation step in conjunction with a dephlegmation step to treat at least a portion of the permeate vapor from the pervaporation step. The process yields a membrane residue stream, a stream enriched in the more volatile component (usually the organic) as the overhead stream from the dephlegmator and a condensate stream enriched in the less volatile component (usually the water) as a bottoms stream from the dephlegmator. Any of these may be the principal product of the process. The membrane separation step may also be performed in the vapor phase, or by membrane distillation.Type: ApplicationFiled: June 12, 2002Publication date: January 1, 2004Applicants: Membrane Technology and Research, Inc., United States Environmental Protection AgencyInventors: Leland M. Vane, Anurag P. Mairal, Alvin Ng, Franklin R. Alvarez, Richard W. Baker
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Publication number: 20030233934Abstract: A process for treating mixtures of organic components, including azeotropic mixtures. The process includes a gas- or liquid-phase membrane separation step in conjunction with a dephlegmation step to treat at least a portion of the permeate vapor from the pervaporation step. The process yields a membrane residue stream, a stream enriched in the more volatile component as the overhead stream from the dephlegmator and a condensate stream enriched in the less volatile component as a bottoms stream from the dephlegmator. Any of these may be the principal product of the process.Type: ApplicationFiled: June 11, 2003Publication date: December 25, 2003Applicant: Membrane Technology and Research, Inc.Inventors: Johannes G. Wijmans, Richard W. Baker, Anurag P. Mairal