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Process for conversion of lower alkanes to aromatic hydrocarbons and ethylene

A technology for lower alkanes and aromatics, which is applied in the field of integration of lower alkanes to produce aromatics and ethylene, and can solve the problems of high investment and operating costs

Inactive Publication Date: 2011-08-17
SHELL INT RES MAATSCHAPPIJ BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The net result is that the capital expenditure and operating costs of this cracker complex are much higher than those of crackers that produce only ethylene from the main ethane feedstock

Method used

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  • Process for conversion of lower alkanes to aromatic hydrocarbons and ethylene
  • Process for conversion of lower alkanes to aromatic hydrocarbons and ethylene
  • Process for conversion of lower alkanes to aromatic hydrocarbons and ethylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] In containing 80wt% CBV 2314 ZSM-5 powder (SiO 2 :Al 2 o 3 Catalysts A and B with low Pt and Ga content were prepared on extrudate samples obtained from Zeolyst International) and 20 wt% alumina binder in a molar ratio of 23:1. These catalysts were prepared as described in US Provisional Application No. 61 / 029478, filed February 18, 2008, entitled "Process for the Conversion of Ethane to Aromatic Hydrocarbons." Extrudate samples were calcined in air at up to 650°C to remove residual moisture prior to use in catalyst preparation. The target metal loading for Catalyst A was 0.025 wt% Pt and 0.09 wt% Ga. The target metal loading for Catalyst B was 0.025 wt% Pt and 0.15 wt% Ga.

[0049] By first combining appropriate amounts of aqueous stock solutions of tetraammineplatinum nitrate and gallium(III) nitrate, diluting this mixture with deionized water to a volume just sufficient to fill the pores of the extrudate, and impregnating the extrudate with this solution at room ...

Embodiment 2

[0063] Additional performance testing was performed as described in Example 1 using fresh (not previously tested) feeds A and B described in Example 1, except that the feed consisted of 32.8 wt% ethane and 67.2 wt% propane. Table 2 presents the results of an on-line gas chromatographic analysis of a sample of the total product stream from these reactors 3 minutes after feed introduction. Under these conditions, over 99 wt% of the propane in the feed and over 20 wt% of the ethane in the feed were converted in all of these catalyst performance tests. The product stream contains benzene and higher aromatics as well as hydrogen and light hydrocarbons, including some ethane which can be recycled.

[0064] Table 2

[0065]

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Abstract

The present invention provides an integrated process for producing ethylene and aromatic hydrocarbons, specifically benzene, which comprises: (a) contacting a mixed lower alkane feed with an aromatic hydrocarbon conversion catalyst to produce a product mixture which is comprised of aromatic reaction products including benzene, unreacted ethane and non-aromatic products, (b) separating and recovering the benzene and any other aromatic reaction products, (c) separating and recovering the ethane, and (d) introducing the ethane into a cracker to produce ethylene.

Description

technical field [0001] The present invention relates to an integrated process for the production of aromatics and ethylene from lower alkanes. More specifically, the present invention relates to an integrated process for the production of benzene and ethylene from lower alkanes at lower capital and operating costs. Background technique [0002] Benzene and ethylene are two of the most important basic products in the modern petrochemical industry. Benzene is used to make key petrochemicals such as styrene, phenol, nylon and polyurethane. Ethylene is used to make other petrochemicals such as polyethylene, ethylene oxide, ethylene dichloride, and ethylbenzene. [0003] Generally, benzene and other aromatics are separated from aromatics-rich feedstock fractions (such as reformate produced by catalytic reforming processes and pyrolysis gasoline produced by naphtha cracking processes) with non-aromatics using solvent extraction methods. obtained by separation. However, in an e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C4/16C07C2/42C07C15/02C07C4/06C07C11/04
CPCC07C4/06C07C11/04C07C2/76C07C2529/42C07C15/02Y02P20/10
Inventor A·M·劳里泽A·M·迈德贾维卡
Owner SHELL INT RES MAATSCHAPPIJ BV