Method for synthesizing ethylbenzene from benzene and ethanol

A technology for synthesizing ethylbenzene and ethanol, applied in chemical instruments and methods, condensation between hydrocarbons and non-hydrocarbons to produce hydrocarbons, carbon compound catalysts, etc., can solve the problems of high by-product xylene content and low ethylbenzene selectivity, etc. Achieve the effect of less product impurities, low xylene content and low raw material cost

Active Publication Date: 2020-05-29
YANCHANG ZHONGKE (DALIAN) ENERGY TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Patent CN 103664483 B provides a method for producing ethylbenzene by reacting benzene and ethanol, which mainly solves the problem of low selectivity of ethylbenzene in the prior art, and the molecular sieve used is MCM-22
[0005] Patent CN 103539622 B relates to a method for producing ethylbenzene by alkylation, which mainly solves the problem of high content of by-product xylene in the prior art, and the molecular sieve used is ZSM-5

Method used

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  • Method for synthesizing ethylbenzene from benzene and ethanol
  • Method for synthesizing ethylbenzene from benzene and ethanol
  • Method for synthesizing ethylbenzene from benzene and ethanol

Examples

Experimental program
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Effect test

Embodiment 1-8

[0069] The synthesis of embodiment 1-8 pure phase ZSM-11 molecular sieve

[0070] 1.4g sodium hydroxide is dissolved in 100g deionized water, and 50g silica sol (SiO 2 content 30%), 2.66g aluminum chloride and 2.33g aniline were mixed together and added to the above solution, crystallized at 180°C for 24h, after cooling, filtered, washed, and dried to obtain a pure phase ZSM-11 molecular sieve sample, which was recorded as sample 1#.

[0071] The operation steps are as above, and the type and ratio of raw materials and crystallization conditions are changed to obtain the ZSM-11 molecular sieve as follows.

[0072] ZSM-11 molecular sieves synthesized under different conditions in table 1

[0073]

[0074] The XRD diffraction pattern of sample 1# is as follows figure 1 As shown, it can be seen that sample 1# is a single peak at 2θ=45.12°, which is the main difference from ZSM-5 and other heterogeneous phases. It can be seen that sample 1# is a pure phase ZSM-11. figure 2...

Embodiment 9-17

[0077] The raw materials benzene and ethanol are mixed uniformly in the liquid state in advance according to the molar ratio of 6:1 (6 mol of benzene, 1 mol of ethanol, 7 mol in total), and enter into the pure phase ZSM-11 molecular sieve catalyst synthesized by the above examples after being heated and vaporized. Alkylation reactor, the catalyst is 2# sample, the dosage is 1g, the bed temperature of the alkylation reactor is 440°C, the pressure is 1.2MPa, and the total weight space velocity is 5 hours -1 . Change the corresponding operating conditions, wherein the amount of ethanol is 1mol, and the amount of catalyst is 1g, see Table 2 for details.

[0078] Table 2 Alkylation reaction data of benzene and ethanol

[0079]

[0080] As can be seen from Table 2, using pure phase ZSM-11 as a catalyst, ethanol instead of ethylene as a raw material and benzene to synthesize ethylbenzene, the raw material cost is low, and the conversion rate is high; the product ethylbenzene has ...

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Abstract

The invention discloses a method for synthesizing ethylbenzene, wherein the method comprises the steps: making a raw material containing benzene and ethanol contact with a catalyst in a reactor, and carrying out a reaction to obtain ethylbenzene, wherein the catalyst contains a pure-phase ZSM-11 molecular sieve. A pure-phase ZSM-11 molecular sieve is used as a catalyst, ethanol is used as an alkylation reagent to react with benzene to synthesize ethylbenzene, and the product ethylbenzene has few impurities and low xylene content and is easy to separate.

Description

technical field [0001] The application relates to a method for producing ethylbenzene by alkylation of ethanol and benzene, which belongs to the field of organic synthesis. Background technique [0002] Ethylbenzene is an important chemical raw material and an indispensable key raw material for the production of styrene. Most ethylbenzene manufacturers produce ethylbenzene for the production of styrene, and a small amount of it is used as a solvent, diluent, and diethylbenzene. More than 90% of ethylbenzene is used to produce styrene, and styrene is an important basic organic chemical raw material, mainly used in the field of polymer materials to prepare polystyrene and its copolymers, such as ABS, AS, styrene-butadiene rubber and Its unsaturated polyester, in addition, styrene as an organic reaction intermediate is also widely used in pharmaceuticals, coatings, pigments and textile industries. Along with the automobile industry, insulator industry, packaging industry and d...

Claims

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Application Information

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IPC IPC(8): C07C15/073C07C2/88
CPCC07C2/88C07C2529/40C07C15/073Y02P20/52
Inventor 裴仁彦赵文广夏春晖吕新新杨冬荣任晓光
Owner YANCHANG ZHONGKE (DALIAN) ENERGY TECH CO LTD
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