Regeneration process of fixed and carried aluminium trichloride catalyst

A technology of aluminum trichloride and catalyst, which is applied in the field of regeneration of aluminum trichloride immobilized catalysts, and can solve problems such as poisoning

Inactive Publication Date: 2004-04-28
CHINA PETROCHEMICAL CORP +1
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to avoid exposure to moisture during the loading and u

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Regeneration process of fixed and carried aluminium trichloride catalyst
  • Regeneration process of fixed and carried aluminium trichloride catalyst
  • Regeneration process of fixed and carried aluminium trichloride catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A 40-80 mesh AlCl 3 The support of the immobilized catalyst is biporous γ-Al 2 o 3 , its specific surface area is 122.3m 2 / g, pore volume 1512.5mm 3 / g, average pore diameter φ792nm, pore distribution of φ6~20nm accounted for 30.1%, φ600~1400nm accounted for 43.3%, >φ1400nm accounted for 8.6%, surface-immobilized AlCl x (x=2.2) content 7.5wt%. Measure 15ml of the catalyst and fill it in a stainless steel fixed-bed reactor with an inner diameter of φ12mm and a length of 420mm. At T=30℃, P=0.1MPa, LHSV=2.0h -1 condition, with C 4 Mixed hydrocarbons (including n-C 4 0 +i-C 4 0 18.2wt%, -i-C 4 ＝ 27.7wt%, t-2-C 4 ＝ 8.1wt%, c-2-C 4 ＝ 2.9wt%, 1-C 4 ＝ 43.1wt%, H 2 O25ppm) as raw material for isobutylene polymerization. The initial activity was 94.1% conversion, 92.2% selectivity and 1311 average molecular weight. After 2000 hours of continuous operation, the conversion rate dropped to 57.2%, the selectivity rate was 88.1%, and the average molecular weight ...

Embodiment 2

[0043] The material in the secondary deactivated catalyst bed layer is housed in embodiment 1 is vented, with N 2 Blow for 10 minutes, and then pump the regenerant into the catalyst bed for circulation. The temperature of the catalyst bed is controlled at about 70°C, and the circulation time is 24 hours. Thereafter, the regeneration agent is emitted, and the N 2 Blow dry the residual regenerant in the catalyst bed. Restore the polymerization reaction conditions in Example 1, and compare with the procatalyst. The primary activity of the catalyst after secondary regeneration is 93.8% of isobutene conversion, 90.5% of selectivity and 1108 average molecular weight of the product. After continuous operation for 250 hours, the conversion rate of isobutene is 92.1%, the selectivity is 89.3% and the average molecular weight is 1092.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

When the catalyst making aluminium muriate fix-load on the surface of refractory oxides of gamma-Al2O3 and SiO2 is used to make isobutelene being in C4 mixed hydrocarbon implement selective oligomerization reaction and is inactivated because microwater residual in raw material is poisoned said invention uses alkane halide (CCl4, CHCl3, CH2Cl2, CH2Cl-CH2Cl) solution containing AlCl3 as regeneration agent, and adopts the processes of soaking, reflux distillation or regeneration agent circulation to make the catalyst obtain regeneration.

Description

technical field [0001] The invention relates to a regeneration method of an aluminum trichloride immobilized catalyst. Background technique [0002] Aluminum trichloride is one of the Friedel-Crafts catalysts widely used in chemical industry, pharmaceutical industry and oil refining industry. Due to its strong corrosiveness, troublesome separation and post-treatment of the same product, and environmental pollution, its use is increasingly restricted. It is very meaningful to turn it into an environmentally friendly solid acid catalyst through the immobilization of aluminum trichloride and still maintain its good catalytic properties. [0003] Patents USP 2,927,087 (1960), USP 3,248,343 (1966), USP 3,449,264 (1969) and USP 4,929,800 (1990) reported that γ-Al 2 o 3 , SiO 2 refractory oxide as a support, through AlCl 3 A method of immobilization by reacting with surface hydroxyl groups. AlCl prepared by the above method 3 The solid-supported catalyst exhibits excellent c...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B01J27/125B01J38/54
Inventor蔡天锡贺民王新平石先哲
OwnerCHINA PETROCHEMICAL CORP