Propylene-containing composition
OwnerCornelis Van Egmond, Nicolas Coute +1inventors
InventorsCornelis Van Egmond, Nicolas Coute, Jaimes Sher
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Abstract
The present invention provides a new propylene-containing compositions, which preferably are suitable for polymerization disposition. The propylene-containing compositions include propylene, propane, dimethyl ether and one or more of ethylene, ethane, methanol, acetylene, methyl acetylene, propadiene, C4+ hydrocarbons and water. The propylene-containing composition can be derived from an oxygenate to olefin reaction system without expending resources on propane/propylene separation.
Claims131
A propylene-containing composition, comprising:
- (a) at least 95 volume percent propylene;
- (b) at least 0.5 volume percent propane;
- (c) at least 10 vppm ethane;
- (d) at least 1 vppm ethylene;
- and
- (e) from 0.5 to 2 vppm dimethyl ether.
A propylene-containing composition, comprising:
- (a) at least 95 volume percent propylene;
- (b) from 0.5 to about 5 volume percent propane;
- (c) at least 0.02 vppm C4+ hydrocarbons;
- (d) at least 0.01 vppm methanol;
- and
- (e) from 0.5 vppm to 2 vppm dimethyl ether.
A propylene-containing composition, comprising:
- (a) at least 95 volume percent propylene;
- (b) from 0.5 to about 5 volume percent propane;
- (c) at least 10 vppm ethane;
- (d) at least 0.05 vppm acetylene;
- and
- (e) from 0.5 to 2 vppm dimethyl ether.
A propylene-containing composition, comprising:
- (a) at least 95 volume percent propylene;
- (b) from 0.5 to about 5 volume percent propane;
- (c) at least 10 vppm ethane;
- (d) at least 0.02 vppm C4+ hydrocarbons;
- and
- (e) from 0.5 to 2 vppm dimethyl ether.
A propylene-containing composition, comprising:
- (a) at least 95 volume percent propylene;
- (b) from 0.5 to about 5 volume percent propane;
- (c) at least 0.01 vppm water;
- (d) at least 0.01 vppm methanol;
- and
- (e) from 0.5 to 2 vppm dimethyl ether.
A propylene-containing composition, wherein the composition is formed by a process comprising the steps of:
- (a) contacting an oxygenate with a molecular sieve catalyst in a reactor under conditions effective to form an effluent stream comprising propylene, propane, ethylene, dimethyl ether and ethane;
- (b) separating the effluent stream in a first separation unit into a first fraction and a second fraction, wherein the first fraction contains a majority of the ethane, ethylene and propylene, and wherein the second fraction contains a majority of the dimethyl ether;
- and
- (c) separating at least a portion of the first fraction into a third fraction and the propylene-containing composition, wherein the third fraction contains a majority of the ethylene and ethane present in the at least a portion of the first fraction, and wherein the propylene-containing composition comprises at least 95 volume percent propylene, at least 0.5 volume percent propane, at least 10 vppm ethane, at least 1 vppm ethylene, and from 0.5 to 2 vppm dimethyl ether.
A propylene-containing composition, wherein the composition is formed by a process comprising the steps of:
- (a) contacting an oxygenate with a molecular sieve catalyst in a reactor under conditions effective to form an effluent stream comprising propylene, propane, ethylene, DME and ethane;
- (b) separating the effluent stream in a first separation unit into a first fraction and a second fraction, wherein the first fraction contains a majority of the ethane and ethylene, and wherein the second fraction contains a majority of the DME, propane and propylene;
- and
- (c) separating at least a portion of the second fraction into the propylene-containing composition and a third fraction wherein the propylene-containing composition comprises at least 95 volume percent propylene, at least 0.5 volume percent propane, at least 10 vppm ethane, at least 1 vppm ethylene, and from 0.5 to 2 vppm DME, and wherein the third fraction contains a majority of the propane and DME present in the second fraction.
Dependencies are inferred from the claim text.