Alkane hydroisomerization catalyst, its preparation method and application

A technology for hydroisomerization and catalyst, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, organic isomerization, etc. It can solve the problems of prolonging the process flow, increasing the difficulty of operation, and increasing the investment cost.

Inactive Publication Date: 2006-04-26
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But both processes have shortcomings. The former cannot effectively play the synergistic effect of the mixed molecular sieve...

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0030] 130 grams of 85% orthophosphoric acid were added to the mixture of 80 grams of pseudoboehmite (loss on ignition 32.5%), 30 grams of hydrogen ZSM-23 molecular sieve and 502 grams of water, stirred for 3 hours, then added 136 grams of di n-Propylamine, and finally 73.9 g of 30% silica sol was added. The molar composition of silicoaluminophosphate colloid is: Al 2 o 3 :P 2 o 5 : SiO 2 :R:H 2 O=1.0:1.0:0.6:2.4:56, the addition amount of ZSM-23 molecular sieve is in the silicoaluminophosphate colloid (Al 2 o 3 +P 2 o 5 +SiO2 2 ) 16% of the total weight. After stirring for 12 hours, it was transferred to a 1000 ml autoclave, and after sealing, the stirring speed was adjusted to 300 rpm, and the temperature was raised to 200° C. in 4 hours, and hydrothermal crystallization was carried out for 48 hours. After the crystallization was completed, the autoclave was placed in water for rapid cooling, the product was filtered and washed until the pH of the filtrate was neu...

Embodiment 2

[0032] 130 grams of 85% orthophosphoric acid were added to the mixture of 80 grams of pseudo-boehmite (loss on ignition 32.5%) and 502 grams of water, stirred for 3 hours, added 30 grams of hydrogen-type ZSM-22 molecular sieve former powder, stirred for 3 Hour, then add 136 grams of di-n-propylamine, and finally add 73.9 grams of 30% silica sol. The molar composition of silicoaluminophosphate colloid is: Al 2 o 3 :P 2 o 5 : SiO 2 :R:H 2 O=1.0:1.0:0.6:2.4:56, the addition amount of ZSM-22 molecular sieve is in the silicoaluminophosphate colloid (Al 2 o 3 +P 2 o 5 +SiO2 2 ) 16% of the total weight. After stirring for 12 hours, transfer it to a 1000 ml high-pressure reactor. After sealing, adjust the stirring speed to 300 rpm, start to heat up, and raise the temperature to 120°C in 4 hours, hydrothermal crystallization for 12 hours, and then heat up to 200°C in 4 hours. Thermal crystallization for 48 hours. After the crystallization was completed, the autoclave was pl...

Embodiment 3

[0034] 130 grams of 85% orthophosphoric acid were added to the mixture of 80 grams of pseudo-boehmite (loss on ignition 32.5%) and 502 grams of water, stirred for 3 hours, added 30 grams of hydrogen-type ZSM-5 molecular sieve former powder, stirred for 3 Hour, then add 136 grams of di-n-propylamine, and finally add 73.9 grams of 30% silica sol. The molar composition of silicoaluminophosphate colloid is: A1 2 o 3 :P 2 o 5 : SiO 2 :R:H 2 O=1.0:1.0:0.6:2.4:56, the addition amount of ZSM-5 molecular sieve is in the silicoaluminophosphate colloid (Al 2 o 3 +P 2 o 5 +SiO2 2 ) of 1% of the total weight. After stirring for 12 hours, transfer it to a 1000 ml high-pressure reactor. After sealing, adjust the stirring speed to 300 rpm, start to heat up, and raise the temperature to 120°C in 4 hours, hydrothermal crystallization for 12 hours, and then heat up to 200°C in 4 hours. Thermal crystallization for 48 hours. After the crystallization, the autoclave was placed in water ...

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PUM

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Abstract

The alkane hydroisomerization catalyst comprises: the composite molecular sieve formed by silica-alumina structure and silicoaluminophosphate structure both of ten-membered ring and composed of ZSM-22/SAPO-11, ZSM-23/SAPO-11, ZSM-5/SAPO-11, EU-1/SAPO-11, and NU-87/SAPO-11 composite sieves; and 0.05~5.0wt% one or two metal from Pt, Pd and Ir of VIII group noble metal. Compared with prior art, this catalyst has higher activity, selectivity, and yield.

Description

technical field [0001] The invention relates to a catalyst for alkane hydroisomerization. [0002] The present invention also relates to a method for preparing the above-mentioned catalyst. [0003] The invention also relates to the use of the catalysts described above. Background technique [0004] The isomerization reaction of n-alkanes is an important reaction in petroleum processing, such as the isomerization dewaxing process of lubricating oil and the isomerization pour point depressing process of diesel oil. [0005] N-paraffins are undesirable components in lube oil fractions, resulting in high pour points, low viscosity indices and poor low temperature properties. To improve these properties, it is necessary to remove all or part of the high melting point n-alkanes. At present, the commonly used dewaxing methods mainly include solvent dewaxing, catalytic dewaxing and isomeric dewaxing. [0006] Solvent dewaxing is to use the solubility of wax in solvent to remove...

Claims

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Application Information

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IPC IPC(8): B01J29/44B01J29/85B01J37/02C07B35/08
Inventor 王炳春田志坚胡胜徐竹生徐云鹏林励吾
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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