Chemistry of hydrocarbon compounds – Purification – separation – or recovery – By contact with solid sorbent
Patent
1998-05-21
2000-09-26
Griffin, Walter D.
Chemistry of hydrocarbon compounds
Purification, separation, or recovery
By contact with solid sorbent
585826, 585809, 585820, C07C 700, C07C 712
Patent
active
061245178
ABSTRACT:
Processes using heterogeneous adsorbents are disclosed for purification of relatively impure unsaturated hydrocarbons such as olefins, which are typically produced by thermal cracking of suitable hydrocarbon feedstocks, by passing a feed stream, containing acetylenic impurities, and, optionally, saturated hydrocarbon gases, through a particulate bed predominantly comprising a support material having high a surface area on which is dispersed at least one metallic element. Adsorption is carried out in an essentially dihydrogen-free atmosphere within the bed, effecting selective and reversible adsorption and/or complexing of the contained acetylenic contaminants with the adsorbent, thereby obtaining purified effluent which contains less than a predetermined level of the acetylenic impurities. Selective and reversible adsorption and/or complexing of the contained acetylenic impurities with the adsorbent is continued until levels of acetylenic impurities in the effluent stream increase to a predetermined level. Thereafter, the resulting bed of adsorbent is regenerated in the presence of a reducing gas containing dihydrogen to effect release of the contained acetylenic impurities from the adsorbent.
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Kaminsky Mark P.
Pei Shiyou
Whittaker Robert C.
Wilsak Richard A.
BP Amoco Corporation
Griffin Walter D.
Kanady Mary Jo
Nguyen Tam M.
Oliver Wallace L.
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