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Process to alkylate aromatic with dilute stream comprising propylene and ethylene

A technology for the alkylation of aromatic compounds and ethylene, applied in the direction of hydrocarbons, hydrocarbons, organic chemical methods, etc.

Inactive Publication Date: 2000-08-30
EXXONMOBIL CHEM PAT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, none of these patents teaches or mentions a process for the selective production of cumene in the first step and ethylbenzene in the second step

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2-5

[0037] The procedure of Example 1 was repeated using zeolite beta as the catalyst. Reaction times and temperatures were varied and the results are shown in the table above. Example 6

Embodiment 6

[0038] A 300 cc stirred autoclave was charged with benzene (102.0 g, anhydrous) and LZY-84 zeolite (1.00 g, powdered UOP extrudate, dried at 200°C). The autoclave was purged with hydrogen, pressurized to 100 kPa, and heated to 130°C. Add enough ethylene to increase the total pressure by 100kPa. Propylene (1.8 g) was added to the autoclave, and additional hydrogen was added to bring the total pressure to 1467 kPa. After stirring for 30 minutes, the autoclave was rapidly cooled to 6°C and then slowly vented. Collect and analyze liquid contents. The cumene content was 2.61 wt% and the ethylbenzene content was 0.14 wt%. The unreacted propylene content was 0 wt%. Example 7

Embodiment 7

[0039] A 300 cc stirred autoclave was charged with benzene (102.9 g, anhydrous) and LZY-84 zeolite (1.09 g, powdered UOP extrudate, dried at 200°C). The autoclave was purged with hydrogen, pressurized to 100 kPa, and heated to 90°C. Add enough ethylene to increase the total pressure by 100kPa. Propylene (1.6 g) was added to the autoclave, and additional hydrogen was added to bring the total pressure to 1460 kPa. After stirring for 10 minutes, the autoclave was rapidly cooled to 6°C and then slowly vented. Collect and analyze liquid contents. The cumene content was 2.90 wt% and the ethylbenzene content was 0.02 wt%. The unreacted propylene content was 0.02 wt%.

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PUM

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Abstract

The present invention provides a method comprising (a) contacting a first reaction mixture comprising an aromatic and a dilute stream comprising ethylene and propylene with a large pore microporous solid acid catalyst, preferably a large pore zeolite catalyst, which is effective to promote alkylation of the aromatic under first conditions effective to maintain a liquid phase comprising the aromatic and effective to cause the propylene to alkylate said aromatic but substantially ineffective to cause the ethylene to alkylate said aromatic, forming propylated aromatic and a second dilute stream comprising ethylene but substantially depleted of propylene, and (b) recovering the propylated aromatic.

Description

field of invention [0001] The present invention relates to a process for the selective catalytic alkylation of an aromatic compound, preferably benzene, using a dilute stream comprising ethylene and propylene. Background of the invention [0002] Alkylated aromatics are the basis for the production of a variety of useful petrochemicals. For example, ethylbenzene, cumene, ethyltoluene, cumene (cymene), and other alkyl-substituted aromatic compounds are effective feedstocks for the production of various styrene and phenolic polymer materials. Alkyl substituted aromatics are also effective as high octane transportation fuels. The use of alkyl-substituted aromatic compounds as gasoline blending agents can increase the volume of the product and increase the octane number. The aromatic alkylation process also provides an economical means of reducing the benzene content of gasoline. [0003] The most prevalent processes for producing alkylated aromatics require the use of substa...

Claims

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Application Information

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IPC IPC(8): C07B61/00C07C2/66
CPCC07C2/66C07C2529/70C07C2529/08C07C2529/85C07C15/02
Inventor D·E·汉德里克森J·R·拉特纳J·P·里斯特斯
Owner EXXONMOBIL CHEM PAT INC