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Production method of linear alkylbenzene

A technology of linear alkylbenzene and production method, applied in chemical instruments and methods, addition of unsaturated hydrocarbons and saturated hydrocarbons to hydrocarbon production, including molecular sieve catalysts, etc. and product selectivity, etc., to achieve the effect of improving reaction activity and product selectivity, long catalyst life, reducing reaction temperature and reaction pressure

Pending Publication Date: 2022-01-11
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, some problems still exist in the existing solid acid catalysts, which cannot take into account the service life, reaction temperature and pressure, activity and product selectivity at the same time

Method used

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  • Production method of linear alkylbenzene
  • Production method of linear alkylbenzene
  • Production method of linear alkylbenzene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Add 1.25g of sodium hydroxide into 150g of deionized water, stir to dissolve. Add 5.5g of sodium metaaluminate and stir to dissolve. Stirring was continued vigorously for 1 h. Slowly add 50g of tetraethylammonium hydroxide solution and continue to stir vigorously for 1h. Slowly add 100g of silica sol, and continue to stir vigorously for 2h to obtain a crystallized gel. The crystallized gel was crystallized at 160° C. for 24 hours, and cooled to 140° C. to continue crystallization for 12 hours. The crystallized product is washed, filtered and dried to obtain the beta zeolite molecular sieve. After calcination at 550°C for 6 hours to remove the template agent, ammonium exchange with 1mol / L ammonium nitrate solution at 80°C for 2 hours, and calcination at 550°C for 4 hours to obtain H-type β zeolite molecular sieve.

[0049] Among them, the XRD spectrum of the H-type beta zeolite molecular sieve is shown in figure 1 , SEM image see figure 2 . Depend on figure 1 an...

Embodiment 2

[0054] Add 1.57g of potassium hydroxide into 200g of deionized water, stir to dissolve. Add 16.5g of aluminum sulfate and stir to dissolve. Stirring was continued vigorously for 1 h. Slowly add 21.5g of tetraethylammonium bromide and continue to stir vigorously for 1h. Slowly add 45g of white carbon black and continue to stir vigorously for 3h to obtain a crystallized gel. The crystallized gel was crystallized at 170°C for 12h, and cooled to 125°C for 24h. The crystallized product is washed, filtered and dried to obtain the beta zeolite molecular sieve. After calcination at 550°C for 6 hours to remove the template agent, ammonium exchange with 1mol / L ammonium nitrate solution at 80°C for 2 hours, and calcination at 550°C for 4 hours to obtain H-type β zeolite molecular sieve.

[0055] Among them, the XRD spectrum of the H-type beta zeolite molecular sieve is shown in image 3 , SEM image see Figure 4 . Depend on image 3 and Figure 4 It can be seen that the H-type b...

Embodiment 3

[0060] Take 2 g of the finished catalyst product prepared in Example 1, put it into a fixed-bed reactor, and feed the mixture of benzene and 1-decene. The reaction conditions are: benzene-ene ratio 12, reaction temperature 137°C, reaction pressure 5.0MPa, mass space velocity 4.0.

[0061] The reaction result is: after 200 hours of reaction, the conversion rate of 1-decene is 99.23%, the selectivity of 2-alkylbenzene is 49%, and the selectivity of 2-alkylbenzene and 3-alkylbenzene is 63%.

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Abstract

The invention relates to a production method of linear alkylbenzene. In the method, benzene and long-chain olefin are subjected to an alkylation reaction under the catalysis of a solid acid catalyst, and the solid acid catalyst comprises the following components in percentage by mass: 10-95% of a low-agglomeration-degree microcrystalline zeolite molecular sieve with a BEA topological structure and 5-90% of an inorganic oxide binder. The low-agglomeration-degree microcrystalline zeolite molecular sieve with the BEA topological structure is a beta zeolite molecular sieve, an XRD spectrogram of the low-agglomeration-degree microcrystalline zeolite molecular sieve has strong diffraction peaks at 2theta angles of 6.98 + / -0.5, 7.74 + / -0.5, 21.92 + / -0.5 and 22.11 + / -0.4 which are obviously widened, and the full width at half maximum is (0.60-0.71) degrees, (0.20-0.24) degrees, (0.33-0.41) degrees and (0.34-0.45) degrees respectively; the structure crystallite size is 10-50 nm, and the agglomerated particle size is 50-300 nm.

Description

technical field [0001] The invention relates to a production method of alkylbenzene, in particular to a production method of linear alkylbenzene. Background technique [0002] Alkylation is a very important type of reaction in petrochemical industry. The commonly used catalysts can be divided into L acid catalysts and B acid catalysts. L acid catalyst with anhydrous AlCl 3 As the main representative, it has the advantages of low price, good catalytic activity, and mature technology. However, in the production process, it is accompanied by a large amount of aluminum-containing waste liquid and too many side reactions. At present, this catalyst has been basically eliminated by the market. B acid catalyst with HF, H 2 SO 4 and H 3 PO 4 to represent. At present, the industrial production of linear alkylbenzene (LAB) mainly uses HF catalyst, and the production technology is monopolized by UOP Company of the United States, with a market share of more than 90%. It has the cha...

Claims

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Application Information

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IPC IPC(8): C07C15/107C07C2/58C07C2/62B01J29/70
CPCC07C2/58C07C2/62B01J29/7007B01J2229/40C07C2529/70C07C15/107
Inventor 崔岩李梦晨任思帅韩明汉王晓化郭成玉刘其武沈宜泓于宏悦沈雨歌迟克彬李发永
Owner PETROCHINA CO LTD
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