Alkylation process with recycle of hydrogen and recovery of hydrogen chloride
First Claim
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1. An alkylation process, comprising:
- a. alkylating a reactant in an alkylation reactor (300) in the presence of an alkylation catalyst comprising an ionic liquid catalyst;
b. regenerating a used catalyst (70) comprising the ionic liquid catalyst and a chloride, from the alkylation reactor (300), in a hydrogenation reactor (100) to produce a regenerated catalyst effluent (10);
c. separating at least a portion of the regenerated catalyst effluent (10), using a hydrocarbon extraction solvent (25) comprising;
i. an alkylate gasoline comprising branched isoparaffins,ii. the reactant for the alkylating comprising an isomerized olefin comprising isobutylene, oriii. mixtures thereof,into a gas fraction comprising a hydrogen gas (20), a light hydrocarbon fraction comprising a hydrogen chloride (30), and a regenerated ionic liquid catalyst stream;
d. recycling at least a part of the gas fraction comprising the hydrogen gas (20) to the hydrogenation reactor (100); and
e. recovering at least an amount of the light hydrocarbon fraction comprising the hydrogen chloride (30) and recycling the at least an amount of the light hydrocarbon fraction to the alkylation reactor (300);
wherein the gas fraction comprising the hydrogen gas (20) has a lower level of hydrogen chloride that is from 72 to 99 wt % lower than a level of hydrogen chloride in the regenerated catalyst effluent (10).
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Abstract
We provide processes, and process units for practicing the processes, comprising
- a. regenerating a used catalyst comprising an ionic liquid catalyst and a chloride, from an alkylation reactor, in a hydrogenation reactor to produce a regenerated catalyst effluent;
- b. separating at least a portion of the regenerated catalyst effluent into a gas fraction comprising a hydrogen gas and into a light hydrocarbon fraction comprising a hydrogen chloride;
- c. recycling at least a part of the gas fraction comprising the hydrogen gas to the hydrogenation reactor; and
- d. recovering at least an amount of the light hydrocarbon fraction comprising the hydrogen chloride and recycling the at least the amount of the light hydrocarbon fraction to the alkylation reactor. The alkylation process units comprise a hydrogenation reactor, a fractionation unit, and connections for transmitting the gas fraction to the hydrogenation reactor and for transmitting the light hydrocarbon fraction to the alkylation reactor.
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22 Claims
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1. An alkylation process, comprising:
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a. alkylating a reactant in an alkylation reactor (300) in the presence of an alkylation catalyst comprising an ionic liquid catalyst; b. regenerating a used catalyst (70) comprising the ionic liquid catalyst and a chloride, from the alkylation reactor (300), in a hydrogenation reactor (100) to produce a regenerated catalyst effluent (10); c. separating at least a portion of the regenerated catalyst effluent (10), using a hydrocarbon extraction solvent (25) comprising; i. an alkylate gasoline comprising branched isoparaffins, ii. the reactant for the alkylating comprising an isomerized olefin comprising isobutylene, or iii. mixtures thereof, into a gas fraction comprising a hydrogen gas (20), a light hydrocarbon fraction comprising a hydrogen chloride (30), and a regenerated ionic liquid catalyst stream; d. recycling at least a part of the gas fraction comprising the hydrogen gas (20) to the hydrogenation reactor (100); and e. recovering at least an amount of the light hydrocarbon fraction comprising the hydrogen chloride (30) and recycling the at least an amount of the light hydrocarbon fraction to the alkylation reactor (300); wherein the gas fraction comprising the hydrogen gas (20) has a lower level of hydrogen chloride that is from 72 to 99 wt % lower than a level of hydrogen chloride in the regenerated catalyst effluent (10). - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20, 21, 22)
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2. An alkylation process, comprising:
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a. alkylating a reactant in an alkylation reactor (300) in the presence of an alkylation catalyst comprising an ionic liquid catalyst; b. regenerating a used catalyst (70) comprising the ionic liquid catalyst and a chloride, from the alkylation reactor (300), in a hydrogenation reactor (100) to produce a regenerated catalyst effluent (10); c. mixing a hydrocarbon extraction solvent (25) comprising; i. an alkylate gasoline comprising branched isoparaffins, ii. the reactant for the alkylating comprising an isomerized olefin comprising isobutylene, or iii. mixtures thereof, with the regenerated catalyst effluent (10) to make a mixture; d. separating at least a portion of the mixture into a gas fraction comprising a hydrogen gas (20) and into a light hydrocarbon fraction comprising a hydrogen chloride (30), the hydrocarbon extraction solvent (25), and a regenerated ionic liquid catalyst; e. recycling at least a part of the gas fraction comprising the hydrogen gas (20) to the hydrogenation reactor (100); f. recycling the regenerated ionic liquid catalyst to the alkylation reactor (300); and g. recovering at least an amount of the light hydrocarbon fraction comprising the hydrogen chloride (30) and recycling the at least an amount of the light hydrocarbon fraction to the alkylation reactor (300); wherein the gas fraction comprising the hydrogen gas (20) has a lower level of hydrogen chloride that is from 72 to 99 wt % lower than a level of hydrogen chloride in the regenerated catalyst effluent (10).
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3. An alkylation process, comprising:
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a. alkylating a reactant in an alkylation reactor (300) in the presence of an alkylation catalyst comprising an ionic liquid catalyst; b. regenerating a used catalyst (70) comprising the ionic liquid catalyst and a chloride, from the alkylation reactor (300), in a hydrogenation reactor (100) to produce a regenerated catalyst effluent (10); c. separating at least a portion of the regenerated catalyst effluent (10) into an offgas (50) comprising a hydrogen gas and into a separated liquid (85); d. mixing a hydrocarbon extraction solvent (25) comprising; i. an alkylate gasoline comprising branched isoparaffins, ii. the reactant for the alkylating comprising an isomerized olefin comprising isobutylene, or iii. mixtures thereof, with the offgas (50) to make a mixture; e. separating the mixture into a gas fraction comprising the hydrogen gas (20) and into a light hydrocarbon fraction comprising a hydrogen chloride (30); f. recycling at least a part of the gas fraction comprising the hydrogen gas (20) to the hydrogenation reactor (100); g. further separating the separated liquid (85), in a presence of a conjunct polymer extraction solvent (55), into an extracted conjunct polymer naphtha (45) and a regenerated ionic liquid catalyst stream (60); and h. recovering at least an amount of the light hydrocarbon fraction comprising the hydrogen chloride and recycling the at least an amount of the light hydrocarbon fraction to the alkylation reactor (300); wherein the gas fraction comprising the hydrogen gas (20) has a lower level of hydrogen chloride that is from 72 to 99 wt % lower than a level of hydrogen chloride in the offgas (50). - View Dependent Claims (19)
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Specification