Patents by Inventor Alvin Ng

Alvin Ng 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).

  • Separation process using pervaporation and dephlegmation
    Patent number: 6755975
    Abstract: 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: Grant
    Filed: June 12, 2002
    Date of Patent: June 29, 2004
    Assignees: Membrane Technology and Research, Inc., The United States of America as represented by the Environmental Protection Agency
    Inventors: Leland M. Vane, Anurag P. Mairal, Alvin Ng, Franklin R. Alvarez, Richard W. Baker
  • Natural gas dehydration process and apparatus
    Publication number: 20040079228
    Abstract: 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: Application
    Filed: October 25, 2002
    Publication date: April 29, 2004
    Applicant: Membrane Technology and Research, Inc.
    Inventors: Johannes G. Wijmans, Alvin Ng, Anurag P. Mairal
  • Treatment of shipboard-generated oily wastewaters
    Publication number: 20040079706
    Abstract: 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: Application
    Filed: October 24, 2002
    Publication date: April 29, 2004
    Applicant: Membrane Technology and Research, Inc.
    Inventors: Anurag P. Mairal, Alvin Ng, Johannes G. Wijmans, Ingo Pinnau, Jennifer H. Ly
  • Separation process using pervaporation and dephlegmation
    Publication number: 20040000521
    Abstract: 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: Application
    Filed: June 12, 2002
    Publication date: January 1, 2004
    Applicants: Membrane Technology and Research, Inc., United States Environmental Protection Agency
    Inventors: Leland M. Vane, Anurag P. Mairal, Alvin Ng, Franklin R. Alvarez, Richard W. Baker