Preparation method for preparing paraxylene catalyst by virtue of alkylation of methanol

A xylene catalyst, alkylation technology, applied in physical/chemical process catalysts, chemical instruments and methods, organic compound/hydride/coordination complex catalysts, etc. Uniformity, poor catalyst stability and other problems, to achieve the effects of high catalytic activity and stability, shortened process route, and improved single-pass yield

Inactive Publication Date: 2018-03-20
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In industry, p-xylene is generally produced by separating aromatics from petroleum cracking products, disproportionating toluene, or transalkylating heavy aromatics. Because these methods produce a large amount of benzene by-product, and the economic value of benzene is low, it affects p-xylene to a certain extent. Econom

Method used

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  • Preparation method for preparing paraxylene catalyst by virtue of alkylation of methanol

Examples

Experimental program
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Example Embodiment

[0015] Example 1

[0016] A method for preparing a catalyst for preparing para-xylene by methanol alkylation includes the following steps:

[0017] Step 1. Pt(acac) with a total mass of 50mg 2 And Fe (acac) 2 And the precursor are put into a reactor with a volume of 20ml, the Pt (acac) 2 And Fe (acac) 2 The quantity ratio of the substance is 1:1;

[0018] Step 2. Put 20g of Cu-BTC nanoporous material into the reactor, then add 500μL of tetrahydrofuran into the reactor, close the reactor, and press into 150atm supercritical CO 2 In the reactor, heated to 60°C and kept for 2 hours, then slowly release the pressure to obtain the preparation of nanoporous material supported Pt and Fe precursors;

[0019] Step 3. Put the above precursor into the reaction kettle, add 1 mL of tetrahydrofuran borane, close the reaction kettle, and press in 150atm supercritical CO 2 In the reaction kettle, heat to 80°C and keep for 2 hours, the reaction is over, after natural cooling to room temperature, slowly...

Example Embodiment

[0026] Example 2

[0027] Step 1. Pt(acac) with a total mass of 30mg 2 Fe (acac) 2 And the precursor are put into a reactor with a volume of 20ml, the Pt (acac) 2 Fe (acac) 2 The quantity ratio of the substance is 1:1;

[0028] The remaining steps are the same as in Example 1.

Example Embodiment

[0029] Example 3

[0030] Step 1. Pt(acac) with a total mass of 15mg 2 Fe (acac) 2 And the precursor are put into a reactor with a volume of 20ml, the Pt (acac) 2 Fe (acac) 2 The quantity ratio of the substance is 1:1;

[0031] The remaining steps are the same as in Example 1.

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Abstract

The invention discloses a method for preparing a paraxylene catalyst by virtue of alkylation of methanol. The method adopts Pt(acac)2, Fe(acac)2, Cu-BTC, tetrahydrofuran, borane-tetrahydrofuran complex, Cu(NO3)2.3H2O and BTC as main raw materials, adopts a super-critical metal compound as a precursor under the effect of supercritical carbon dioxide serving as a fluid medium, adoptes a Cu-BTC porous material as a carrier, and adopts boranes as a reducing agent to react, thus obtaining a pours material loaded binary or multi-element nano alloy catalyst. By virtue of the alkylation reaction of the methanol, paraxylene is obtained, so that an isomeration step in the traditional process is omitted, the technological route is shortened, and the single-course yield of the paraxylene is greatly increased.

Description

technical field [0001] The invention relates to a fluidized bed catalyst for producing p-xylene with high selectivity in the alkylation of benzene and methanol and a preparation method thereof, belonging to the technical field of catalysts. Background technique [0002] P-xylene is an extremely important bulk chemical raw material, mainly used in the production of terephthalic acid and dimethyl terephthalate. Due to the rapid development of my country's polyester industry, the consumption of p-xylene has also increased rapidly. In industry, p-xylene is generally produced by separating aromatics from petroleum cracking products, disproportionating toluene, or transalkylating heavy aromatics. Because these methods produce a large amount of benzene by-product, and the economic value of benzene is low, it affects p-xylene to a certain extent. Economics of the toluene production process. The traditional method mostly adopts fixed bed technology, the bed temperature is not unifo...

Claims

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Application Information

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IPC IPC(8): B01J31/22B01J35/10C07C2/86C07C15/08
CPCB01J31/1691B01J31/2213B01J2531/0241B01J2531/16C07C2/864C07C15/08Y02P20/52Y02P20/54
Inventor 高光珍
Owner XUZHOU NORMAL UNIVERSITY
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