Supercharge Your Innovation With Domain-Expert AI Agents!

Isomerization catalyst and preparation method thereof

A catalyst and isomerization technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, organic isomerization, etc., can solve the problem of unfavorable long-term stable operation of catalysts, unfavorable industrial production and application, and influence on the crystal structure of molecular sieves, etc. problems, to achieve long-term stable operation, improve reaction efficiency and isomerization selectivity, and prevent carbon deposition and deactivation

Pending Publication Date: 2021-07-16
PETROCHINA CO LTD
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the above-mentioned method usually involves several times of exchange / modification, washing, drying, roasting and other processes on the hydrogen-type ferrierite molecular sieve, which easily introduces framework heteroatoms into the product, affects the crystal structure of the molecular sieve, and is not conducive to the growth of the catalyst. Periodic stable operation, and the preparation process of the above method is complicated, the material consumption and energy consumption are large, and the cost is high, which is not conducive to industrial production and application

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
  • Isomerization catalyst and preparation method thereof
  • Isomerization catalyst and preparation method thereof
  • Isomerization catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 1. Preparation of modified alumina

[0044] Take 1000 grams of pseudo-boehmite and place it in a beaker, add a solution (about 1000 mL) prepared by 37.6 grams of magnesium nitrate to it for equal volume impregnation, after aging at room temperature for 24 hours, dry at 100 ° C for 12 hours to obtain Modified alumina.

[0045] 2. Preparation of sodium molecular sieve

[0046] According to 1Al 2 o 3 : 29.6SiO2 2 : 7 cyclohexylamine: 600H 2 The feed ratio (molar ratio) of O, under stirring conditions, 4000 grams of deionized water, 293 grams of sodium hydroxide, and silica sol, sodium aluminate and cyclohexylamine according to the metering ratio are added in the autoclave, after stirring , synthesized by crystallization at 145°C for 72 hours; after the crystallization synthesis, the filtrate of the crystallization synthesis product was washed with deionized water to neutrality, and the filter cake was dried to obtain Na-type ZSM-35 molecular sieve, such as figure 1 w...

Embodiment 2

[0052] 1. Preparation of modified alumina

[0053] Take 1000 grams of pseudo-boehmite and place it in a beaker, add a solution (about 1000 mL) prepared by 52.8 grams of magnesium nitrate and 21.5 grams of potassium nitrate to it for equal volume impregnation, after aging at room temperature for 24 hours, dry at 100 ° C for 12 Hours, modified alumina was prepared.

[0054] 2. Preparation of sodium molecular sieve

[0055] According to 1Al 2 o 3 : 31.2SiO2 2 : 7.2 Ethylenediamine: 620H 2 The feed ratio (molar ratio) of O, under stirring condition, 4000 grams of deionized water, 293 grams of sodium hydroxide and silica sol, aluminum sulfate and ethylenediamine in metering ratio are added in the autoclave, after stirring, Crystallization synthesis at 165°C for 72 hours; after the crystallization synthesis, the filtrate of the crystallization synthesis product was washed with deionized water until neutral, and the filter cake was dried to obtain Na-type ZSM-35 molecular sieve....

Embodiment 3

[0060] 1. Preparation of modified alumina

[0061] Take 1000 grams of SB powder and place it in a beaker, add a solution (about 1000 mL) prepared by 54.4 grams of magnesium acetate to it for equal volume impregnation, after aging at room temperature for 24 hours, dry at 100 °C for 12 hours to obtain modified oxide aluminum.

[0062]2. Preparation of sodium molecular sieve

[0063] Sodium molecular sieves were prepared according to the method in Example 1.

[0064] 3. Preparation of isomerization catalyst

[0065] Adopt above-mentioned modified alumina and sodium type molecular sieve, prepare catalyst intermediate according to the method for embodiment 1;

[0066] Immerse the above catalyst intermediate in 1000mL of ammonium nitrate solution with a concentration of 1.0mol / L, and exchange it at 80°C for 2 hours; after the exchange, filter the exchange solution, and dry the exchanged catalyst intermediate; dry the dried The catalyst intermediate was submerged again in 1000 mL...

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

PropertyMeasurementUnit
Specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention provides an isomerization catalyst and a preparation method thereof. The preparation method of the isomerization catalyst comprises the following steps: modifying an aluminum oxide raw material with a metal element to obtain modified aluminum oxide, wherein the metal element is selected from at least one of the IA family and the IIA family of the periodic table of elements; mixing and molding the modified aluminum oxide and a sodium type molecular sieve to obtain a catalyst intermediate; and carrying out ammonium exchange on the catalyst intermediate to obtain the isomerization catalyst. The isomerization catalyst is low in preparation cost, high in activity stability and beneficial to industrial production and application.

Description

technical field [0001] The invention relates to a catalyst, in particular to an isomerization catalyst and a preparation method thereof. Background technique [0002] Isobutene is an important chemical raw material, mainly used to prepare butyl rubber, polyisobutylene, methacrylonitrile, antioxidant, tert-butylphenol, tert-butyl ether, etc. With the development and utilization of isobutene downstream products, through the separation of petroleum cracking The isobutene produced by the C4 fraction is far from meeting the demand. [0003] In addition, the light gasoline etherification process can react the carbon five active olefins in gasoline with methanol to generate methyl tert-amyl ether. This process can effectively reduce the olefin content in catalytic gasoline, increase the octane number of catalytic gasoline, and reduce steam At the same time, it can convert low-value methanol into high-value gasoline, thereby improving the economic benefits of refineries, so it has ...

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): B01J29/65B01J37/02B01J37/04B01J37/30B01J35/10C07B35/08
CPCB01J29/65B01J37/0201B01J37/04B01J37/30C07B35/08B01J2229/22B01J35/60
Inventor 徐亚荣樊金龙陈蓝天龚涛许磊贺春梅魏书梅
Owner PETROCHINA CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com