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Linear alkyl benzene synthesis method

A technology of straight-chain alkylbenzene and synthesis method, which is applied in the addition of unsaturated hydrocarbons and saturated hydrocarbons to hydrocarbon production, organic chemistry, and bulk chemical production, etc. It can achieve the effect of high olefin conversion rate, avoiding frequent switching operations of device reaction and regeneration, and good activity stability.

Inactive Publication Date: 2013-06-05
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the solid acid alkylation process overcomes the shortcomings of the traditional hydrofluoric acid process, the current solid acid catalyst is prone to deactivation and has a short single-pass life, and the alkylation reaction and catalyst regeneration of the solid acid process require frequent switching

Method used

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  • Linear alkyl benzene synthesis method
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  • Linear alkyl benzene synthesis method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Solid superacid Ni / SO4 2- -SnO 2 Catalyst preparation.

[0020] A certain mass of SnCl 4 ·5H 2 O was dissolved in deionized water to prepare a solution with a mass fraction of 5%, and slowly added dropwise ammonia water with a mass fraction of 28% under rapid stirring to adjust the pH value of the solution to 8, and left to stand at room temperature for aging overnight. After suction filtration, the filter cake was subjected to 4% CH 3 COONH 4 The solution is washed until the pH value is equal to 7, and dried at 110°C to obtain the precursor Sn(OH) 4 ; Grind the precursor to a particle size of less than 110 mesh powder. Ni(NO3) 2 ·6H 2 O was dissolved in 3.0 mol / L sulfuric acid solution to prepare a sulfuric acid solution of nickel nitrate with a concentration of 0.5 mol / L. According to the ratio of liquid to solid ratio of 15mL / g, take 2g of Sn(OH) 4 , immersed in the above solution under stirring, so that Ni 2+ and SO4 2- Loaded on Sn(OH) 4 above, dried a...

Embodiment 2

[0022] Using solid super acid Ni / SO4 2- -SnO 2 The catalyst carries out the alkylation reaction of benzene and olefins.

[0023] The alkylation raw materials used are industrial benzene and industrial alkene mixed hydrocarbons (C10-C13), wherein the industrial alkene mixed hydrocarbons have a linear olefin content of 10.3% and a diene mass content of 0.4%.

[0024] Using a fixed-bed reaction device, 4.0 grams of the catalyst with a particle size of less than 110 mesh prepared in Example 1 was loaded into the reactor. After the catalyst was loaded into the reactor, it was first purged with nitrogen (60ml / min) at 160°C for 2 hours for catalyst activation treatment, then the reactor temperature was adjusted to 150°C and the pressure was adjusted to 3.0MPa. The molar ratio of substances is 20:1, and the mass space velocity is 1.0h -1 The alkylation reaction is carried out continuously under the conditions, and samples are taken regularly to measure the conversion rate of olefin...

Embodiment 3

[0028] The alkylation reaction between benzene and olefins was carried out under different temperature conditions.

[0029] The alkylation raw materials used are industrial benzene and industrial alkene mixed hydrocarbons (C10-C13), wherein the industrial alkene mixed hydrocarbons have a linear olefin content of 10.3% and a diene mass content of 0.4%.

[0030] Using a fixed-bed reaction device, 4.0 grams of the catalyst with a particle size of less than 110 mesh prepared in Example 1 was loaded into the reactor. After the catalyst was loaded into the reactor, it was first purged with nitrogen (60 ml / min) at 160° C. for 2 hours to carry out catalyst activation treatment. Then, at a pressure of 3.0 MPa, the ratio of benzene to olefins in the feed is 20:1, and the mass space velocity is 1.0 h -1 Continuous alkylation reactions at different temperatures were carried out under the same conditions, samples were taken regularly, and the olefin conversion rates at different reaction ...

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Abstract

The present invention relates to a linear alkyl benzene synthesis method, which comprises: adopting linear olefin containing 10-14 carbon atoms and benzene as raw materials, conveying into a reactor, and carrying out an alkylation reaction under a catalysis effect of a solid superacid Ni / SO42--SnO2 catalyst to obtain the linear alkyl benzene, wherein the reaction conditions comprise that: a temperature is 10-300 DEG C, a pressure is 0.1-10 MPa, an amount ratio of the benzene to the olefin material is 2-100:1, and a fed material total mass space velocity is 0.1-20 h<-1>. The synthesis method has the following characteristics that: the adopted reactor reaction is stably performed, and an olefin conversion rate is high.

Description

technical field [0001] The invention relates to a method for synthesizing straight-chain alkylbenzenes, in particular to a method for synthesizing straight-chain alkylbenzenes using solid acid as a catalyst. Background technique [0002] Linear alkylbenzene is the alkylation product of linear olefins and benzene under the action of a catalyst, and is the main raw material for synthetic detergents. The hydrofluoric acid-catalyzed alkylation process is widely used in industry to synthesize linear alkylbenzenes. Since hydrofluoric acid corrodes equipment and pollutes the environment, it has become an inevitable development trend to use non-corrosive and non-toxic solid acid catalysts to replace hydrofluoric acid catalysts, and to use environmentally friendly alkylation processes to synthesize linear alkylbenzenes. [0003] CN1072353A discloses the use of Y-type molecular sieve modified by alkaline earth metal calcium, strontium, barium, etc. and rare earth metal lanthanum, cer...

Claims

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Application Information

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IPC IPC(8): C07C2/70C07C15/107B01J27/053
CPCY02P20/52
Inventor 董平任杰邵伟金辉齐泮仑袁海宽西晓丽王桂芝马同庆赵光辉佟华芳秦丽华崔锡红贾云刚邵荣兰韩会君赵玉梅
Owner PETROCHINA CO LTD
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