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Production of alumina solid acid catalyst fixed carried on aluminum muriate

A technology of solid acid catalyst and aluminum trichloride, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as pressure drop, achieve high stability, high oligomerization selectivity, Overcomes strong corrosive and extremely toxic effects

Inactive Publication Date: 2007-04-04
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is an obvious problem of pressure drop in the fixed bed reaction packed with fine particle catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Put 15ml spherical (diameter≤2mm) high-purity γ-Al 2 o3 (provided by Sinopec Changling Refinery and Chemical Plant Catalyst Branch Factory, wherein the total content of Na, Ca, Mg, Fe, Si and S components is lower than 0.05wt.%) into quartz material reaction tube I (inner diameter 20mm, length 30mm ) inside and outside with an electric heating furnace, and there is a N inside the tube 2 (purity 99.99wt.%). in N 2 γ-Al at a flow rate of 53.3ml / min and a temperature of 500°C 2 o 3 2h pretreatment. Add CCl at a flow rate of 2.66ml / h with a non-pulse metering pump 4 , at this time AlCl 3 The formation rate of is about 26.3 mmol / min.

[0045] Select a spherical d=1.0-1.65mm gamma-Al with a double-pore structure of mesopores and macropores 2 o 3 (provided by China Daily Chemical Industry Research Institute, wherein the total content of Na, Ca, Mg, Fe, Si and S components is lower than 0.05wt.%) as a carrier, its pore volume is 1.512cm 3 / g, specific surface area 122...

Embodiment 2

[0048] Add 6.44g of catalysts prepared in Example 1 to a volume 200ml autoclave with electromagnetic stirring, under the condition of reaction temperature 30°C and reaction pressure 1.0MPa, pass through 2ZB-1L10 double plunger micropump (Beijing satellite manufacturing plant) Put C 4 The raw material is fed into the high-pressure pump, and its volume flow rate is 20ml / h, C 4 The fractions are grouped into: i-C 4 ＝ : 24.5(m)%, t-C 4 ＝ : 15.98(m)%, n, c-C 4 ＝ : 29.4(m)%, n-C 4 0 +i-C 4 0 : 30.4(m)%). Isobutene undergoes continuous polymerization. The reacted material flows out of the reaction kettle through the porous metal filter installed in the kettle, and then is reduced to normal pressure through the YT-4 back pressure valve, and enters the gas-liquid separator for separation. The unreacted components (n-C 4 0 , i-C 4 0 , n-C 4 ＝ ,t-C 4 ＝ , c-C 4 ＝ with unreacted i-C 4 ＝ ) is separated in a gaseous state, and the polyisobutene product remains at the b...

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Abstract

An alumina carried AlCl3 solid acid catalyst with high activity, selectivity and stability for the oligomerizing reaction of isobutene on suspended bed is prepared through reaction between CCl4 and high-purity gamma-Al2O3 to generate AlCl3 vapor, reacting on the hydroxy groups on the surface of gamma-Al2O3 with both meso-porous and macroreticular structure, pulverizing and sieving by 10-400 meshes.

Description

technical field [0001] The invention belongs to the technical field of chemical industry and relates to a method for preparing aluminum trichloride immobilized on alumina solid acid catalyst. Background technique [0002] Aluminum trichloride is one of the important Friedel-Crafts catalysts widely used in the chemical industry and oil refining industry. It shows excellent catalytic performance for reactions such as alkylation, acylation, alkane isomerization, hydrocarbon cracking and polymerization. . However, due to its strong corrosiveness, extreme toxicity, difficulty in separating the same products, cumbersome post-treatment, and environmental pollution, its use is increasingly restricted. By immobilizing aluminum trichloride on γ-Al 2 o 3 On, and still maintain its excellent catalytic properties, making its application possible. Tracing back to the history of the development of aluminum trichloride immobilized catalysts, as early as during the Second World War, in o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/125B01J27/10B01J21/04
Inventor 蔡天锡贺民纪敏张有家李伯骥
Owner DALIAN UNIV OF TECH
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