Chemical conversion process
AssigneeUop LLC
InventorsJeffrey M. O. Lewis, William H. Henstock
Life of this patent
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Abstract
A process for catalytically converting a feedstock into a product which comprises: (a) contacting the feedstock with a fluidized mass of solid particles comprising crystalline microporous three dimensional solid catalyst in a reaction zone at conditions effective to convert the feedstock into the product; (b) contacting the particles in the reaction zone with a first purge medium to reduce the amount of at least one of the feedstock and the product in contact with the particles; and (c) contacting the particles in the reaction zone with regeneration medium at conditions effective to improve at least one catalytic property of the catalyst, provided that steps (a), (b) and (c) are repeated periodically.
Claims28
A cyclic process for catalytically converting a feedstock containing one or more compounds selected from the group consisting of alcohols, halides, mercaptans, sulfides, amines, ethers and carbonyl compounds, said compounds having from 1 to about 4 carbon atoms per molecule, into a product containing light olefins in a fluidized bed reaction zone which comprises the sequential steps of:
- (a) contacting said feedstock with a fluidized mass of solid particles comprising crystalline microporous three-dimensional solid catalyst in said reaction zone at conditions effective to convert said feedstock into said product and to form carbonaceous deposit material on said catalyst;
- (b) discontinuing said feedstock contacting and then contacting said particles with a first purge medium within said reaction zone to reduce the amount of at least one of said feedstock and said product in contact with said particles;
- and
- (c) discontinuing said first purge contacting and then contacting said particles with regeneration medium within said reaction zone at conditions effective to remove at least a portion of said carbonaceous deposit material from said catalyst, provided that steps (a), (b) and (c) are repeated periodically.
A cyclic process for catalytically converting a feedstock containing one or more compounds selected from the group consisting of alcohols, halides, mercaptans, sulfides, amines, ethers and carbonyl compounds, said compounds having from 1 to about 4 carbon atoms per molecule, into a product containing light olefins in a fluidized bed reaction zone which comprises the sequential steps of:
- (a) contacting said feedstock with a fluidized mass of said particles comprising crystalline microporous silicoaluminophosphate (SAPO) molecular sieve catalyst having pores with an effective diameter less than about 5 .ANG. in said reaction zone at conditions effective to convert said feedstock into said product and to form a carbonaceous deposit material on said catalyst;
- (b) discontinuing said feedstock contacting and then contacting said particles with a first purge medium within said reaction zone to reduce the amount of at least one of said feedstock and said product in contact with said particles;
- and
- (c) discontinuing said first purge contacting and then contacting said particles with regeneration medium within said reaction zone at conditions effective to remove at least a portion of said carbonaceous deposit material from said catalyst, provided that steps (a), (b) and (c) are repeated periodically.
Dependencies are inferred from the claim text.