Mixed refrigerant/expander process for the recovery of c_+ hydrocarbons
CA 2016282 C · Owner: Air Products And Chemicals, Inc. · Inventors: Rowles, Howard Charles; Ayres, Calvin Lynn
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is an energy efficient process for the recovery and purification of C3+ hydrocarbons from a high pressure natural gas or refinery/petrochemical feed gas containing C3+ hydrocarbons and light gases. In the process, the high pressure feed gas is initially cooled by heat exchange with a multi-component refrigerant fluid circulating in a closed-loop cycle thereby condensing a large portion of the C3+ hydrocarbons. The non-condensed remaining gas is work, expanded to an intermediate pressure thus providing refrigeration for condensing the remaining C3+ hydrocarbons. The condensed C3+ hydrocarbon liquid streams are combined and are further purified by distillation in an …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed May 8, 1990 and granted February 8, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 8, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 8, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.