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US 12,258,302 B2Granted
Ionic liquid alkylation of isobutane with ethylene to produce alkylate
AssigneeChevron U.S.A. Inc.
InventorsBong-Kyu Chang, Hye-Kyung Cho Timken, Huping Luo
Life of this patent
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Abstract
A process for producing high octane alkylate is provided. The process involves reacting isobutane and ethylene using an ionic liquid catalyst. Reaction conditions can be chosen to assist in attaining, or to optimize, desirable alkylate yields and/or properties.
Claims14
An alkylate having a research octane number (RON) of 93 or more, comprising:
- (i) at least 70 wt. % C6 paraffins, wherein the C6 paraffins comprise isomers of dimethylbutane (DMB) and methylpentane (MP) and a molar ratio of DMB to MP is at least 7:1;
- (ii) 1 wt. % to 30 wt. % C8 paraffins;
- and
- (iii) less than 20 wt. % C9+ paraffins.
1 more element
An alkylate having a research octane number (RON) of 93 or more, prepared by a process comprising:
- passing an isobutane feed and an ethylene feed to an alkylation reactor, wherein the alkylation reactor contains an ionic liquid catalyst, the ionic liquid comprising an organic cation and a halometallate anion, for reacting the isobutane and ethylene to generate an alkylate having a research octane number (RON) of 93 or more;
- wherein the alkylation reactor is operated at reaction conditions including a temperature of from 30° C. to 100° C., a pressure of from 300 psig to 700 psig (2068 kPa to 4826 kPa), an overall paraffin to olefin molar ratio from 2 to 20, and a residence time of from 5 minutes to 1 hour;
- and
- collecting an alkylate comprising at least 70 wt. % C6 parafins, from 1 wt. % to 30 wt. % C8paraffin, and less than 20 wt. % C9+ paraffin.
1 more element
Dependencies are inferred from the claim text.