Aromatic hydrocarbon liquid phase alkylation method

A technology for liquid-phase alkyl and aromatic hydrocarbons of aromatic hydrocarbons, applied in chemical instruments and methods, organic chemistry, hydrocarbons, etc., can solve problems such as poor stability and easy deactivation of catalysts, so as to improve stability and reduce olefin content Effect

Active Publication Date: 2014-01-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that there are problems in the prior art that the catalyst is easily deactivated and the stability is poor, and a new liquid-phase alkylation method for aromatic hydrocarbons is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] According to the method disclosed in Chinese patent ZL200610117871.7, organosilicon-containing zeolite was prepared: 3.0 g of alumina was dissolved in 450 g of water, 16.0 g of sodium hydroxide was added to dissolve it, and then hexamethyleneimine 34.7 g was added while stirring. gram, and then add 60 grams of solid silicon oxide and 5.9 grams of dimethyldiethoxysilane. After the reaction mixture was stirred evenly, it was put into a stainless steel reaction kettle, and crystallized at 145° C. for 70 hours while stirring. After taking out, it is filtered, washed and dried.

[0013] Take 50 grams of dried above-mentioned organosilicon zeolite samples, mix them well with 20 grams of alumina, add 5 (weight)% nitric acid, knead them, extrude them into strips of φ1.6×2 mm, and roast them at 550°C for 6 hours , to prepare the required catalyst.

[0014]

Embodiment 2

[0016] 600 grams of 40% silica sol, 38.9 grams of sodium aluminate (42% alumina content), 70.6 grams of 25% tetraethylammonium hydroxide (TEAOH), 5.0 grams of diethylamine (DEA), 168.0 grams of tetraethyl bromide Ammonium chloride (TEABr), 16.0 grams of sodium hydroxide, 136.0 grams of 25% ammonium hydroxide and 925.1 grams of water were mixed, and stirred evenly at room temperature. Then, it was transferred to a stainless steel autoclave with a crystallization temperature of 140° C. and reacted for 96 hours. After the reaction, the crystalline product was filtered, washed with deionized water, and dried. According to X-ray powder diffraction analysis, it is zeolite beta with BEA structure.

[0017] Take the above 50 grams of dried zeolite beta powder sample, and prepare a strip-shaped catalyst according to the same method as [Example 1].

[0018]

Embodiment 3

[0020] UZM-8 zeolite was prepared according to the method disclosed in USP6756030 B1, and prepared into a strip catalyst according to the method of [Example 1].

[0021]

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PUM

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Abstract

The invention relates to an aromatic hydrocarbon liquid phase alkylation method, for mainly solving the problem that a catalyst is easily inactivated and poor in stability in the prior art. According to the technical scheme, a mixture containing saturated alkane, aromatic hydrocarbon and olefin is taken as a raw material, silicon-aluminum crystal zeolite is taken as a catalyst, and the raw material comes into contact with the catalyst to react to generate an alkylation liquid containing alkylbenzene and polyalkylbenzene under the conditions that the reaction temperature is 100-210 DEG C, the reaction pressure is 1.5-5.0MPa, the mole ratio of aromatic hydrocarbon to olefin is 1:10 and the weight space velocity of olefin is 0.1-1.0 hour<-1>, wherein the saturated alkane is at least one of ethane, propane, n-butane, iso-butane, pentane, cyclopentane, methylcyclopentane, hexane or cyclohexane, and the content of the saturated alkane is 1-80% of the weight of the reaction mixture. Due to adoption of the technical scheme, the problem in the prior art is well solved. The aromatic hydrocarbon liquid phase alkylation method can be applied to industrial production of aromatic hydrocarbon liquid phase alkylation.

Description

technical field [0001] The invention relates to a method for liquid-phase alkylation of aromatic hydrocarbons. Background technique [0002] Alkylbenzene is an important class of organic chemical raw materials, and has a wide range of uses in industry, such as: ethylbenzene is mainly used in the production of styrene, and styrene is used in the manufacture of polystyrene to polymer materials on a large scale; Cumene is mainly used in the production of phenol and acetone; sec-butylbenzene is used in the production of phenol and methyl ethyl ketone; cyclohexylbenzene can be used as a raw material for the production of phenol and cyclohexanone, and alkylbenzenes with an alkyl chain length greater than carbon 6 are often used For the production of surfactants. The early production of alkylbenzene mainly used AlCl 3 , solid phosphoric acid method or HF as a catalyst. These catalysts are gradually being phased out due to pollution and corrosion problems. Since the 1990s, the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C2/66C07C15/073C07C15/02C07C15/085C07C13/28
CPCY02P20/52
Inventor 高焕新周斌魏一伦方华顾瑞芳季树芳姚晖
Owner CHINA PETROLEUM & CHEM CORP
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