Catalyst for alkylation of toluene with methanol to produce paraxylene with coproduction of ethylene and application thereof

A technology of paraxylene and catalyst is applied in the field of catalysts for the co-production of ethylene from paraxylene with high selectivity by alkylation of toluene with methanol, which can solve the problem that the downstream application requirements of polyester cannot be met, the selectivity of PX and ethylene cannot have both, and the ethylene /The problem of low proportion of propylene

Inactive Publication Date: 2014-11-05
陕西煤化工技术工程中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] It can be seen from this that in the prior art, the co-production of low-carbon olefins (propylene + ethylene) is mainly based on the production of PX. The content of propylene in low-carbon olefins is too high, and the ratio of

Method used

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  • Catalyst for alkylation of toluene with methanol to produce paraxylene with coproduction of ethylene and application thereof
  • Catalyst for alkylation of toluene with methanol to produce paraxylene with coproduction of ethylene and application thereof

Examples

Experimental program
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Example Embodiment

[0022] Example 1

[0023] The demineralized water, the ZSM-5 molecular sieve, the matrix material and the binder are mixed and sprayed to form and then calcined to obtain the original powder of the fluidized bed catalyst. Then, the original powder of the catalyst is impregnated, dried and calcined with an aqueous solution of phosphorus-containing compound; and then impregnated with an alkoxy compound absolute ethanol solution, dried and calcined to obtain the catalyst. The weight percentage of ZSM-5 molecular sieve in the fluidized bed catalyst is 20%, and the SiO in the ZSM-5 molecular sieve 2 with Al 2 O 3 The molar ratio is 200:1; the weight percentage of the matrix material is 50%, and the matrix material is kaolin; the weight percentage of the binder is 5%, and the binder is silica sol; the weight percentage of phosphorus element is 10%, And the phosphorus-containing compound is phosphoric acid; the weight percentage of silicon element after immersion in anhydrous etha...

Example Embodiment

[0024] Example 2

[0025] The demineralized water, the ZSM-5 molecular sieve, the matrix material and the binder are mixed and sprayed to form and then calcined to obtain the original powder of the fluidized bed catalyst. Then, the original catalyst powder is impregnated, dried and calcined with an aqueous solution containing a lanthanum compound; and then impregnated with an alkoxy compound absolute ethanol solution, dried and calcined to obtain a catalyst. The weight percentage of ZSM-5 molecular sieve in the fluidized bed catalyst is 40%, and the SiO in the ZSM-5 molecular sieve 2 with Al 2 O 3 The molar ratio is 150:1; the weight percentage of the matrix material is 20%, and the matrix material is montmorillonite; the weight percentage of the binder is 25%, and the binder is silica sol; the weight percentage of lanthanum is 10% %, and the lanthanum-containing compound is lanthanum nitrate; the weight percentage of silicon after immersion in anhydrous ethanol solution of...

Example Embodiment

[0026] Example 3

[0027] The demineralized water, the ZSM-5 molecular sieve, the matrix material and the binder are mixed and sprayed to form and then calcined to obtain the original powder of the fluidized bed catalyst. Then adopt alkoxy compound absolute ethanol solution to impregnate, dry, roast; adopt magnesium compound aqueous solution to impregnate, dry, roast to obtain catalyst. The weight percentage of ZSM-5 molecular sieve in fluidized bed catalyst is 70%, and ZSM-5 molecular sieve Medium SiO 2 with Al 2 O 3 The molar ratio is 20:1; the weight percentage of the matrix material is 20%, and the matrix material is silicon oxide; the weight percentage of the binder is 5%, and the binder is a mixture of silica sol and aluminum sol; siloxane The weight percentage of silicon after the compound is impregnated with anhydrous ethanol solution is 0.01%, and the siloxane compound is phenylmethyl polysiloxane; the weight percentage of magnesium element is 4.99%, and the magnesiu...

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Abstract

The invention discloses a catalyst for alkylation of toluene with methanol to produce paraxylene with coproduction of ethylene and application thereof. The catalyst is prepared by modifying zeolite molecular sieve with alkaline earth metal, non-metallic or / and rare earth metal and modifying surface acidity and pore structure by a siloxane compound. The invention aims at the characteristics of the two raw materials paraxylene and ethylene for polyester production, and uses one catalyst for high selectivity production of paraxylene and ethylene at the same time; and the catalyst can be used for industrial shape selective alkylation of toluene with methanol to produce paraxylene, and further can be used in industrial production of polyester.

Description

technical field [0001] The invention belongs to the technical field of chemical catalysts, and relates to a catalyst for producing p-xylene and co-producing ethylene, in particular to a catalyst for producing p-xylene and co-producing ethylene with high selectivity through alkylation of toluene and methanol and its application. Background technique [0002] Polyethylene terephthalate, referred to as polyester (PET), was invented in 1944 and was first industrialized in the UK in 1949. Polyester has rapidly evolved into the most productive variety among synthetic fibers due to its excellent wearability and high strength. Before the 1970s, polyester had maintained a high-speed development trend in developed countries such as Europe and the United States; after the 1990s, the development focus of the polyester industry gradually shifted to Asia, and the polyester industry ushered in a new stage of development. After entering the 21st century, with the rapid development of chemi...

Claims

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Application Information

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IPC IPC(8): B01J29/40C07C2/86C07C1/20C07C11/04C07C11/06C07C15/08
CPCY02P20/52Y02P30/20Y02P30/40
Inventor 张世刚汪彩彩辛玉兵张军民闵小建刘建斌陈亚妮
Owner 陕西煤化工技术工程中心有限公司
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