Membrane Technology and Research, Inc

Douglas Gottschlich

Richard W Baker

Nicholas Patrick Wynn

Paul Su

Alvin Ng

Meijuan Zhou

Marc L Jacobs

Sylvie Thomas-Droz

Kaaeid A Lokhandwala

Matthias Wessling

Scott Segelke

Haiqing Lin

Thomas Hofmann

Shannon Goakey

Matthew Ringer

Gas separation processes are provided for separating dehydrogenation reaction products from a raw gas stream to recover hydrocarbons, specifically olefins, such as propylene and iso-butene, as well as unreacted feedstock. The processes employ a sequence of partial condensation steps, interspersed with membrane separation steps to raise the hydrocarbon dewpoint of the uncondensed gas, thereby avoiding the use of low-temperature or cryogenic conditions.

Membrane-based gas separation processes to separate dehydrogenation reaction products

Disclosed herein is a process for the production of hydrogen by autothermal reforming of natural gas, with simultaneous recovery of carbon dioxide using carbon dioxide-selective membrane separation. Residual gas from the hydrogen and carbon dioxide recovery is recycled back to the autothermal reformer.

Gas separation process for production of hydrogen by autothermal reforming of natural gas, with carbon dioxide recovery

Disclosed herein is a methanol production process that includes a membrane separation step or steps. Using the process of the invention, the efficiency of methanol production from syngas is increased by reducing the compression requirements of the process and/or improving the methanol product yield. As an additional advantage, the membrane separation step generates a hydrogen-rich stream which can be sent for other uses. An additional benefit is that the process of the invention may debottleneck existing methanol plants if more syngas or carbon dioxide is available, allowing for feed of imported carbon dioxide into the synthesis loop. This is a way of sequestering carbon dioxide.

Process for the production of methanol including one or more membrane separation steps

A process for treating a gas stream containing an organic component and a second gas. The process uses at least two compression stages, followed by membrane separation, with recirculation of the membrane permeate streams to different points in the compression train. The process provides particular benefits for separations characterized by modest membrane selectivity and a high concentration of the organic component in the remaining gas the compression steps.

Membrane gas separation process with compressor interstage recycle

A process and apparatus for vinyl acetate production. A membrane unit containing a membrane selectively permeable to ethylene over argon is used to recover ethylene from the argon purge stream.

Membrane process for argon purging from vinyl acetate reactors

A process and apparatus for manufacture of organic products, particularly chemical intermediates, by oxidation of organic feedstocks. A membrane unit containing a membrane selectively permeable to the organic over argon is used to recover the feedstock from the argon purge stream.

Membrane process and apparatus for argon purging from oxidation reactors

A process and apparatus for ethylene oxide production. A membrane unit containing a membrane selectively permeable to ethylene over argon is used to recover ethylene from the argon purge stream.

Membrane process for argon purging from ethylene oxide reactors

A process for treating a purge vent stream from a polymer manufacturing operation, the vent stream containing a polymer, such as ethylene or propylene, and a purge gas, such as nitrogen. The invention involves three separation steps: condensation, flash evaporation and membrane separation. The steps are integrated together in such a way as to provide a good separation between the components, and to avoid creation of secondary streams that need additional treatment.

Monomer recovery process

A process for separating two low-boiling components of a gas-phase mixture. The invention involves three separation steps: condensation, flash evaporation and membrane separation. The steps are integrated together in such a way as to provide a good separation between the components, and to avoid creation of secondary streams that need additional treatment. The invention is particularly useful for separation of low molecular weight organic compounds from other gases.

Separation process combining condensation, membrane separation and flash

A gas-separation method for controlling vapor emissions. The method employs a spiral-wound membrane module, adapted to provide one or more feed-side baffles in the feed channel. The method may be used to control vapor emissions from a volatile liquid, and is particularly useful to control fuel vapors emitted during fuel transfer operations.

Growing community of inventors

Mountain View, CA, United States of America

Douglas Gottschlich