Method for catalytically preparing 2-ethyl anthraquinone by alkali desilicicated modified Hbeta molecular sieve

A technology of alkali desiliconization modification and β molecular sieve, which is applied in the direction of molecular sieve catalysts, chemical instruments and methods, and the preparation of organic compounds. Achieve the effect of convenient separation, high activity and simple operation

Active Publication Date: 2014-06-04
宜兴利荣达科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the technical problems of the present industrial production of 2-ethylanthraquinone using concentrated sulfuric acid catalysts to produce a large amount of acidic waste water

Method used

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  • Method for catalytically preparing 2-ethyl anthraquinone by alkali desilicicated modified Hbeta molecular sieve

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specific Embodiment approach 1

[0018] Specific embodiment one: In this embodiment, a method for catalytically preparing 2-ethylanthraquinone by modifying Hβ molecular sieve by alkali desiliconization is completed according to the following steps:

[0019] 1. Mix the original powder of zeolite beta molecular sieve and alkali solution evenly, and then treat it at a temperature of 30°C to 90°C for 0.5h to 6h, then filter, wash, then dry, and then roast to obtain the zeolite molecular sieve without the template agent, Then according to the solid-to-liquid mass ratio of zeolite molecular sieve removing template agent and ammonium nitrate aqueous solution is 1: (20-50), mix zeolite molecular sieve removing template agent and ammonium nitrate aqueous solution, and then under the condition of temperature 60℃~90℃ Stirring for 2h to 10h, and then roasting to obtain the alkali desiliconization modified Hβ zeolite molecular sieve catalyst;

[0020] 2. Mix 2-(4′-ethylbenzoyl)benzoic acid with the alkali desiliconization...

specific Embodiment approach 2

[0022] Embodiment 2: This embodiment differs from Embodiment 1 in that the ratio of silicon to aluminum in the raw powder of zeolite beta molecular sieve described in step 1 is 25-65. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0023] Embodiment 3: This embodiment differs from Embodiment 1 in that: in step 1, the alkali solution is sodium hydroxide solution with a concentration of 0.1 mol / L-2 mol / L. Others are the same as in the first embodiment.

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Abstract

The invention discloses a method for catalytically preparing 2-ethyl anthraquinone by an alkali desilicicated modified Hbeta molecular sieve, and relates to a method for preparing 2-ethyl anthraquinone by dehydration of 2-(4'-ethyl benzoyl) benzoic acid. The method provided by the invention aims to solve the technical problem that by adopting a concentrated sulfuric acid catalyst to industrially produce 2-ethyl anthraquinone in the prior art, a lot of acid wastewater is generated and the equipment is greatly corroded. The method comprises the following steps: I, preparing an alkali desilicicated modified Hbeta molecular sieve catalyst; and II, reacting to prepare 2-ethyl anthraquinone. The catalyst Hbeta molecular sieve used in the method is environment-friendly solid acid, the acidity and mesoporous dimension of which can be conveniently adjusted by changing conditions of alkali treatment. The process for preparing 2-ethyl anthraquinone belongs to a heterogeneous catalytic process which is simple to operate, and the catalyst after reaction can be conveniently separated, so that the alkali desilicicated modified Hbeta molecular sieve catalyst is high in activity, recyclable and free from any wastewater, so that the method is an environment-friendly method for preparing 2-ethyl anthraquinone.

Description

technical field [0001] The invention relates to a method for preparing 2-ethylanthraquinone by dehydrating 2-(4'-ethylbenzoyl)benzoic acid. Background technique [0002] 2-Ethylanthraquinone is an important dyestuff, pharmaceutical and pesticide intermediate. 2-Ethylanthraquinone can be used in the synthesis of disperse dyes, reactive dyes and acid dyes (C.I. Acid Green 25, C.I. Reactive Blue 19 and C.I. Disperse Red 60, etc.), and used in the printing and dyeing of synthetic fibers. In medicine, anthraquinone and its derivatives are mainly used in the production of antibacterial, antimalarial and antitumor drugs such as doxorubicin, mitoxantrone and aloe-emodin. In the chemical fertilizer industry, 2-ethylanthraquinone is used to produce desulfurization agent sodium anthraquinone disulfonate. In addition, 2-ethylanthraquinone can also be used as a hydrogen-carrying medium in the synthesis of hydrogen peroxide, and it is also used in the production of photosensitive compou...

Claims

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Application Information

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IPC IPC(8): C07C46/00C07C50/16B01J29/70
CPCB01J29/7007B01J2229/12C07C46/00C07C50/16
Inventor 吴伟华东雪肖林飞孙艳丽
Owner 宜兴利荣达科技有限公司
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