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Production method for 2-alkylanthracene

A production method and an alkylation technology, applied in the field of alkylation, can solve the problems of poor selectivity of 2-alkylanthracene, high content of double-substituted products and other by-products, and high cost, and achieve the effect of improving selectivity

Active Publication Date: 2019-04-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technology of producing 2-alkylanthraquinones by oxidation of 2-alkylanthracenes has the advantages of simple process flow and low environmental pollution, and is considered to be a green process technology. However, the current problem of this process is that no 2- Production Technology Report of Alkyl Anthracene
[0007] Compared with the existing anthracene alkylation technology, it is not difficult to find that when liquid acid catalyzes anthracene to react with alkylation reagents, the selectivity of 2-alkylanthracene is poor, and there are many double-substituted products of anthracene and other by-products. When ionic liquid is used as a catalytic system, the cost is high and the catalyst is difficult to recycle

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  • Production method for 2-alkylanthracene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] This example is used to illustrate the production method of 2-alkylanthracene provided by the present invention.

[0055] The alkylation reaction adopts 2-methyl-2-butene as an alkylation agent, mesitylene as an alkylation solvent, and anthracene as a reaction raw material.

[0056] Process reference figure 1 . In the raw material tank containing anthracene and alkylation solvent, the initial concentration of anthracene is 40% by weight, 575 g of anthracene and 1000 ml of mesitylene are added at one time, and the raw material liquid is prepared at a temperature of 165° C. The total molar ratio of anthracene is 2:1, and the total feed amount of 2-methyl-2-butene is 113g. After gasification, it enters the shell side of the membrane reactor, and the olefin consumption is monitored by a flow meter.

[0057]The inner diameter of the tube side of the membrane reactor is 30mm, and the total height is 0.8m. The loading amount of the catalyst is 283g, and the loading height i...

Embodiment 2

[0060] This example is used to illustrate the production method of 2-alkylanthracene provided by the present invention.

[0061] 2-Alkyl anthracene was produced in the same manner as in Example 1, except that the initial concentration of anthracene was 15% by weight, 153 g of anthracene was added at one time, 1000 ml of mesitylene, and a raw material solution was prepared at a temperature of 120° C. The total molar ratio of anthracene is 2:1, and the total feed amount of 2-methyl-2-butene is 30g.

[0062] The inner diameter of the tube side of the membrane reactor is 15mm, and the total height is 0.8m. The catalyst loading amount is 75g, the loading height is 0.62m, the height of the enhanced reaction zone accounts for 50% of the total catalyst loading height, and the height of the dispersed contact zone accounts for 50% of the total catalyst loading height.

[0063] Alkylation reaction conditions include: the temperature of the alkylation reaction is 120°C, the pressure is 0...

Embodiment 3

[0065] This example is used to illustrate the production method of 2-alkylanthracene provided by the present invention.

[0066] 2-Alkyl anthracene was produced in the same manner as in Example 1, except that the initial concentration of anthracene was 15% by weight, 153 g of anthracene was added at one time, 1000 ml of mesitylene, and a raw material solution was prepared at a temperature of 120° C. The total molar ratio of anthracene is 1.2:1, and the total feed amount of 2-methyl-2-butene is 50 g.

[0067] The inner diameter of the tube side of the membrane reactor is 20mm, the total height is 0.8m, the catalyst loading amount is 125g, and the loading height is 0.6m. 50%.

[0068] Alkylation reaction conditions include: the temperature of the alkylation reaction is 120°C, the pressure is 0.1MPa (tube side pressure), the pressure difference between the two sides of the separation medium in the dispersed contact zone in the lower part of the tube side is controlled at 0.15MPa...

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Abstract

The invention relates to the technical field of anthracene alkylation reactions, and discloses a production method for 2-alkylanthracene. The method includes the following steps: in the presence of acatalyst, a raw material liquid containing anthracene and an alkylation solvent is in contact with an alkylation reagent, an alkylation reaction is carried out, wherein the alkylation reaction is performed in a membrane reactor, the raw material liquid containing the anthracene and the alkylation solvent is sent to tube pass of the membrane reactor in a circulation flow manner, and the gasified alkylation reagent is sent into shell pass of the membrane reactor, enters the tube process by a separating medium having a part of tube wall that can penetrate alkylation reagent molecules, and is in contact with the raw material liquid and a catalyst bed layer disposed in the tube pass. The production method for the 2-alkylanthracene provided by the invention enables selectivity of the product the2-alkylanthracene to be significantly improved, at the same time, the alkylation solvent and the catalyst can be recycled and utilized, and the production method has good industrial application prospects.

Description

technical field [0001] The invention relates to an alkylation method, in particular to a method for catalyzing the reaction of anthracene and an alkylating agent to generate 2-alkylanthracene. Background technique [0002] Hydrogen peroxide is an important green basic chemical with a high degree of industrial relevance. Since 2008, my country has become the largest country in the production of hydrogen peroxide, and its consumption in 2015 has exceeded 10 million t / a ( at 27.5%). At present, the process technology for producing hydrogen peroxide at home and abroad is mainly the anthraquinone method. The 2-alkylanthraquinone in this process is used as the "carrier" of the process, which directly affects the quality and output of hydrogen peroxide. The phthalic anhydride method is the main method to produce 2-alkylanthraquinones, but this process has serious environmental pollution problems. To produce 1t of ethylanthraquinone, it needs to consume 1.76t of anhydrous AlCl 3 ...

Claims

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Application Information

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IPC IPC(8): C07C2/66C07C15/28
CPCC07C2/66C07C15/28Y02P20/584
Inventor 郑博费建奇宗保宁潘智勇朱振兴毛俊义唐晓津胡立峰
Owner CHINA PETROLEUM & CHEM CORP