Process for producing olefins
First Claim
1. A process for producing an olefins stream comprising:
- (a) providing a first vapor effluent stream from an oxygenate to olefin conversion reaction, said first vapor effluent stream comprising C2 and C3 olefins, C4 hydrocarbons, and C2 to C6 carbonyl compounds;
(b) adjusting the temperature and pressure of the first vapor effluent stream to produce a second vapor effluent stream having a pressure ranging from about 100 psig to about 350 psig (790 to 2514 kPa) and a temperature ranging from about 70°
F. to about 120°
F. (21 to 49°
C.), said second vapor effluent stream containing about 50 wt. % or more of the C4 hydrocarbons in the first vapor effluent stream;
(c) washing the second vapor effluent stream with a liquid alcohol-containing stream to produce a third vapor effluent stream; and
(d) washing the third vapor effluent stream with liquid water to provide a fourth vapor effluent stream, said fourth vapor effluent stream comprising about 1.0 wt. % or less C2 to C6 carbonyl compounds.
1 Assignment
0 Petitions
Accused Products
Abstract
A process is described for producing an olefins stream from a first vapor effluent stream from an oxygenate to olefin conversion reaction, said first vapor effluent stream comprising C2 and C3 olefins, C4 hydrocarbons, and C2 to C6 carbonyl compounds. In the process, the temperature and pressure of the first vapor effluent stream are adjusted to produce a second vapor effluent stream having a pressure ranging from about 100 psig to about 350 psig (790 to 2514 kPa) and a temperature ranging from about 70° F. to about 120° F. (21 to 49° C.), said second vapor effluent stream containing about 50 wt. % or more C4 hydrocarbons based upon the total weight of C4 hydrocarbons in the first vapor effluent stream. The second vapor effluent stream is then washed with a liquid alcohol-containing stream to produce a third vapor effluent stream, whereafter the third vapor effluent stream is washed with liquid water to provide a fourth vapor effluent stream comprising the C2 and C3 olefins and about 1.0 wt. % or less C2 to C6 carbonyl compounds.
-
Citations
85 Claims
-
1. A process for producing an olefins stream comprising:
-
(a) providing a first vapor effluent stream from an oxygenate to olefin conversion reaction, said first vapor effluent stream comprising C2 and C3 olefins, C4 hydrocarbons, and C2 to C6 carbonyl compounds;
(b) adjusting the temperature and pressure of the first vapor effluent stream to produce a second vapor effluent stream having a pressure ranging from about 100 psig to about 350 psig (790 to 2514 kPa) and a temperature ranging from about 70°
F. to about 120°
F. (21 to 49°
C.), said second vapor effluent stream containing about 50 wt. % or more of the C4 hydrocarbons in the first vapor effluent stream;
(c) washing the second vapor effluent stream with a liquid alcohol-containing stream to produce a third vapor effluent stream; and
(d) washing the third vapor effluent stream with liquid water to provide a fourth vapor effluent stream, said fourth vapor effluent stream comprising about 1.0 wt. % or less C2 to C6 carbonyl compounds. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59)
-
-
60. A process for producing olefins comprising:
-
(a) contacting an oxygenate feed with a molecular sieve catalyst to produce a vapor product stream comprising C2 and C3 olefins, C4 hydrocarbons, water and oxygenate compounds, including C2 to C6 carbonyl compounds;
(b) cooling said product stream to condense therefrom a liquid stream rich in water and oxygenate compounds and produce a first vapor effluent stream comprising C2 and C3 olefins, C4 hydrocarbons, and C2 to C6 carbonyl compounds;
(c) compressing said first vapor effluent stream to produce a second vapor effluent stream having a pressure ranging from about 100 psig to about 350 psig (790 to 2514 kPa) and a temperature ranging from about 70°
F. to about 120°
F. (21 to 49°
C.), said second vapor effluent stream containing about 50 wt. % or more of the C4 hydrocarbons in the first vapor effluent stream;
(d) washing the second vapor effluent stream with a liquid methanol-containing stream to produce a third vapor effluent stream and a liquid oxygenate-containing methanol stream; and
(e) washing the third vapor effluent stream with liquid water to produce a fourth vapor effluent stream and an oxygenate-containing water stream, said fourth vapor effluent stream comprising about 1.0 wt. % or less C2 to C6 carbonyl compounds. - View Dependent Claims (61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85)
-
Specification