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Method for producing n-propylbenzene by using benzene and diisopropylbenzene

A technology of diisopropylbenzene and n-propylbenzene, which is applied in the field of producing n-propylbenzene, can solve the problems of cumbersome reaction steps and unsuitability for industrial production, and achieve the effects of simple process flow, low production cost and good technical effect

Inactive Publication Date: 2018-09-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This reaction step is loaded down with trivial details not suitable for industrial production

Method used

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  • Method for producing n-propylbenzene by using benzene and diisopropylbenzene
  • Method for producing n-propylbenzene by using benzene and diisopropylbenzene
  • Method for producing n-propylbenzene by using benzene and diisopropylbenzene

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Synthesis of ZSM-5 molecular sieves with MFI topology.

[0019] First prepare colloidal seeds, 710.3g H 2 O, 13.8g NaOH and 117.0g TPAOH (20% solution) solution are fully dissolved and mixed until uniform, and then 158.9g silicic acid is gradually added to the above solution under stirring, fully shaken at room temperature for 1h, and aged at 100°C 16h; 867.8g H 2 O, 8.8g NaOH and 10.3g sodium aluminate are fully mixed and dissolved, 113.1g silicic acid is gradually added to the above mixed solution under full stirring and shaken violently for 1h, and 50g of the prepared colloidal seed crystals are added to the above mixed solution Shake for 1 h, then transfer the material to a stainless steel reactor. After crystallization at 180°C for 40h, the crystalline product was filtered, washed and dried. The crystalline product obtained by XRD powder diffraction analysis is ZSM-5 molecular sieve, and its silicon-aluminum ratio is 12-13.5.

[0020] Take 50 g of dried powder ...

Embodiment 2

[0022] Synthesis of Y-type molecular sieves with FAU topology.

[0023] First prepare colloidal directing agent, 20.0g H 2 O, 4.0g NaOH and 2.1g sodium aluminate (20% solution) solution were fully dissolved and mixed until uniform, then 22.7g silicic acid was gradually added to the above solution under stirring, fully shaken at room temperature for 1h, and aged at room temperature overnight; 261.9g H 2 O, 0.28g NaOH and 20.6g sodium aluminate are fully mixed and dissolved, 284.8g silicic acid is gradually added to the above mixed solution under full stirring and shaken violently for 1h, and 50g of the prepared directing agent is added to the above mixed solution Shake in medium for 1h. The material was then transferred to a stainless steel reactor. After crystallization at 100°C for 10 h, the crystalline product was filtered, washed and dried. The crystalline product obtained by XRD powder diffraction analysis is Y-type molecular sieve.

[0024] Take 50 g of dried powder ...

Embodiment 3

[0026] Synthesis of Beta molecular sieves with BEA topology.

[0027] 600g 40 wt.% silica sol, 38.9g sodium aluminate (alumina content 42 wt.%), 70.6g 25wt.% tetraethylammonium hydroxide (TEAOH), 5.0g diethylamine (DEA), 168.0g Mix tetraethylammonium bromide (TEABr), 16.0g sodium hydroxide, 136.0g 25 wt.% ammonium hydroxide, and 925.1g water, and stir evenly at room temperature. Then transferred to a stainless steel autoclave, the crystallization temperature was 155°C, and reacted for 50 hours. After the reaction, the crystalline product was filtered, washed and dried. The crystalline product obtained by XRD powder diffraction analysis is Beta zeolite.

[0028] Take 50 g of dried powder sample, exchange 4 times with 1M ammonium nitrate, filter and dry. After that, fully mix with 20g alumina, and add 5wt% nitric acid to knead, extrude and form into The strips were dried at 120°C for 12 hours and calcined at 500°C for 6 hours to prepare the required catalyst.

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Abstract

The invention relates to a method for producing n-propylbenzene by using benzene and diisopropylbenzene. The method comprises the step of contacting benzene and diisopropylbenzene with a catalyst under the effective reaction condition to obtain the n-propylbenzene, and is characterized in that the effective reaction condition comprises that the temperature is at least more than 200 DEG C. The method can be applied to industrial production of the n-propylbenzene.

Description

technical field [0001] The invention relates to a method for producing n-propylbenzene from benzene and diisopropylbenzene. Background technique [0002] Propylbenzene is an important chemical product, which can be directly used as a solvent and an intermediate in the synthesis of other important chemical raw materials. There are two main isomers of propylbenzene, cumene and n-propylbenzene. Cumene is an important intermediate in the production of phenol, acetone and α-methylstyrene, and can also be used as an additive to increase the octane number of fuel oil, a raw material for synthetic fragrances and polymerization initiators, etc. N-propylbenzene can be used in textile dyes, printing, and acetate cellulose solvent. The latest use is to use it as a nucleating agent for synthesizing sorbitol-based polypropylene. The sorbitol nucleating agent is produced by aldol condensation reaction, and is synthesized by introducing propyl or allyl into the sorbitol molecule, and int...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C6/12C07C15/02B01J29/08B01J29/18B01J29/40B01J29/70
CPCB01J29/084B01J29/18B01J29/40B01J29/7007B01J29/7034C07C6/12C07C2529/08C07C2529/18C07C2529/40C07C2529/70C07C15/02
Inventor 王高伟高焕新魏一伦胥明尤陈佳顾瑞芳方华季树芳姚辉刘远林
Owner CHINA PETROLEUM & CHEM CORP
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