Method for removing trace hydrocarbon out of aromatic hydrocarbon by utilizing HMCM-41 type mesoporous molecular sieve

A technology of HMCM-41 and mesoporous molecular sieve, which is applied in the field of removing olefins in aromatic hydrocarbons, can solve the problems of weak acidity and limited application prospects, and achieve the effects of small environmental impact, simple process flow, and low equipment investment and operating costs.

Active Publication Date: 2014-12-17
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of mesoporous molecular sieve has the disadvantage of weak acidity, and its application prospect is greatly limited.

Method used

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  • Method for removing trace hydrocarbon out of aromatic hydrocarbon by utilizing HMCM-41 type mesoporous molecular sieve
  • Method for removing trace hydrocarbon out of aromatic hydrocarbon by utilizing HMCM-41 type mesoporous molecular sieve
  • Method for removing trace hydrocarbon out of aromatic hydrocarbon by utilizing HMCM-41 type mesoporous molecular sieve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Synthesis of Al-HMCM-41 Mesoporous Molecular Sieve Catalyst

[0033] According to Al 2 o 3 : SiO 2 :CTMAB:NaOH:ETHA:H 2The raw material molar ratio of O is 1:10.0:1.4:2.4:8.67:140.0, weigh 4.86 grams of alumina monohydrate, and the calculated amount of silica sol, cetyltrimethylammonium bromide (CTMAB), hydroxide Sodium, ethanol (ETHA) and deionized water, stirred and mixed at 70°C for 5.0 hours, crystallized at 150°C and autogenous pressure for 24 hours, then filtered, washed with water, dried at 110°C for 3 hours, 550°C Roast for 5 hours to obtain the molecular sieve from which the template agent has been removed; 4 NO 3 , 1.0mol / L) ion-exchange the obtained molecular sieve at 85°C for 5 hours, then dry at 110°C for 3 hours and calcined at 550°C for 3 hours to obtain Al-HMCM-41 mesoporous molecular sieve catalyst powder; After the tablet is formed and ground, the catalyst is sieved with 20 to 40 mesh and recorded as CAT-1.

Embodiment 2

[0035] Synthesis of Cu-HMCM-41 Mesoporous Molecular Sieve Catalyst

[0036] According to Cu(NO 3 ) 2 : SiO 2 :CTMAB:NaOH:ETHA:H 2 The raw material molar ratio of O is 1:5.0:1.0:1.5:20.0:100.0, weigh 12.1 grams of copper nitrate, and the calculated amount of silica sol, cetyltrimethylammonium bromide (CTMAB), sodium hydroxide, Ethanol (ETHA) and distilled water were stirred and mixed at 60°C for 8.0 hours, crystallized at 180°C and autogenous pressure for 12 hours, then filtered, washed with water, dried at 100°C for 5 hours, and calcined at 500°C for 8 hours. Obtain the molecular sieve that removes the template agent; then according to the solid-liquid mass ratio of 1:30, use ammonium nitrate aqueous solution (NH 4 NO 3 , 0.7mol / L) the obtained molecular sieve was stirred at 90°C for 8 hours for ion exchange, then dried at 100°C for 3 hours and calcined at 500°C for 3 hours to obtain Cu-HMCM-41 mesoporous molecular sieve catalyst powder; After the tablet is formed and gr...

Embodiment 3

[0038] Synthesis of B-HMCM-41 Mesoporous Molecular Sieve Catalyst

[0039] According to H 3 BO 3 : SiO 2 :CTMAB:NaOH:H 2 The raw material molar ratio of O is 1:50.0:2.5:4.0:240.0, weigh 3.1 grams of boric acid, and the calculated amount of silica sol, cetyltrimethylammonium bromide (CTMAB), sodium hydroxide and deionized water , they were stirred and mixed at 90°C for 3.0 hours, crystallized at 120°C and autogenous pressure for 48 hours, then filtered, washed with water, dried at 120°C for 5 hours, and calcined at 600°C for 3 hours to obtain template-removing Molecular sieve; then according to the solid-liquid mass ratio of 1:20, ammonium nitrate aqueous solution (NH 4 NO 3 , 1.2mol / L) the obtained molecular sieve was stirred at 85°C for 8 hours for ion exchange, then dried at 120°C for 3 hours and calcined at 600°C for 3 hours to obtain B-HMCM-41 mesoporous molecular sieve catalyst powder; After the tablet is formed and ground, the catalyst is sieved with 20 to 40 mesh ...

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Abstract

The invention discloses a method for removing hydrocarbon out of aromatic hydrocarbon by utilizing an HMCM-41 type mesoporous molecular sieve. The method comprises the following steps of allowing aromatic hydrocarbon to contact and react with solid acid catalyst under conditions that the temperature is between 30 and 350 DEG C, the pressure is between 0.1 and 12MPa and the feeding mass space velocity is between 0.1 and 15 hour<-1> to obtain hydrocarbon removed aromatic hydrocarbon, wherein the hydrocarbon is reformed oil, reformed hydrocarbon or aromatic hydrocarbon generated by a steam cracking device. The method is simple in process flow, does not consume hydrogen, and is low in device investment and operation cost; the catalyst is good in activity stability, the device is stable and long in operation time, less hydrocarbon is lost, and operation of frequent switching between reaction and regeneration of the reactor can be avoided; and the catalyst is reproducible to avoid massive waste catalyst accumulation and bury, and has small influence on the environment.

Description

(1) Technical field [0001] The invention relates to a method for removing olefins in aromatic hydrocarbons by using HMCM-41 mesoporous molecular sieve, in particular to a method for removing trace olefins in aromatic hydrocarbons by using a solid acid catalyst for reaction. (2) Background technology [0002] Aromatics is an important basic raw material, and the petrochemical industry mainly uses naphtha catalytic reforming / aromatics extraction process to produce aromatics. The naphtha fraction is converted into reformed oil after catalytic reforming. The reformed oil is rich in aromatics and solvent oil fractions, and also contains a small amount of olefins. This part of olefins is active, and it is easy to form colloids, which affects the quality of aromatics products, and has adverse effects on some subsequent chemical processes, affecting the further processing and utilization of aromatics. Therefore, in order to obtain qualified chemical raw materials and ensure the smo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C7/148C07C15/02C07C15/04C07C15/06C07C15/08
Inventor 任杰袁海宽金辉
Owner ZHEJIANG UNIV OF TECH
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