Stone & Webster Engineering Corp.

Mobil Corporation

Richard H McCue, Jr

John L Pickering, Jr

Mark Whitney

Richard Barchas

David Chen

Edna B Hicks

Christopher Wallsgrove

The present invention provides an improved method for recovering high purity olefins from cracked gas effluents or other parafin/olefin gaseous mixtures by use of a chemical absorption process.

Chemical absorption process for recovering olefins from cracked gases

A process and system for providing cooling service (refrigerant) for a gas separation process wherein the refrigerant is obtained from the system process fluid and after serving as refrigerant is returned to the process side for separation into product.

Process based mixed refrigerants for ethylene plants

The present invention provides an improved process for selectively hydrogenating acetylenes in an olefin plant process stream by selectively hydrogenating the acetylenes downstream of a front end depropanizer and upstream of further separation zones such as a demethanizer and/or de-ethanizer.

Mixed phase front end C.sub.2 acetylene hydrogenation

A cryogenic technique for recovering ethene from a gaseous mixture containing methane, ethane, etc. Operating methods and apparatus are provided for passing the gas feed through a chilling train having a series of dephlegmator-type exchange units to condense liquid rich in ethene and ethane, while separating a major portion of methane and lighter gas. A multizone demethanizer removes condensed methane from the C.sub.2 fraction to provide multiple methane free liquid streams of varying ethene to ethane ratio at least one of which is essentially C.sub.3 free.

Cryogenic separation of gaseous mixtures

A cyrogenic technique for recovering ethene from a gaseous mixture containing methane, ethane, etc. Operating methods and apparatus are provided for passing the gas feed through a chilling train having a series of dephlegmator-type exchange units to condense liquid rich in ethene and ethane, while separating a major portion of methane and lighter gas. A multizone demethanizer removes condensed methane from the C.sub.2 fraction to provide a pure product economically.

Growing community of inventors

Houston, TX, United States of America

Richard H McCue, Jr