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Preparation method of SBA-16/MOR composite molecular sieve, catalyst and application in double branched chain isomerization

A technology of SBA-16 and composite molecular sieve, which is applied in the field of petroleum processing, and can solve the problems of small specific surface area, cracking, and low selectivity of double-branched isoparaffins

Active Publication Date: 2021-04-13
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] In order to solve the problem of low selectivity and severe cracking of double-branched isoparaffins caused by single microporous MOR molecular sieves in catalytic cracking (FCC) gasoline hydroisomerization due to narrow channels, small specific surface area and strong acidity, single mesoporous SBA- 16 molecular sieves have the restrictive problem of low yield of branched chain isomers due to weak acidity. The present invention provides a low-cost green Preparation method, and using the composite material as a carrier to load non-precious metals to prepare a sulfur-resistant double-branched isomerization catalyst

Method used

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  • Preparation method of SBA-16/MOR composite molecular sieve, catalyst and application in double branched chain isomerization
  • Preparation method of SBA-16/MOR composite molecular sieve, catalyst and application in double branched chain isomerization
  • Preparation method of SBA-16/MOR composite molecular sieve, catalyst and application in double branched chain isomerization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] Preparation of MOR nanocrystal precursor solution: Weigh 8g of activated diatomite, 1.8g of activated retort earth, and 4g of NaOH, 0.2g of seed crystal, dissolve in 60g of deionized water, and then age in a water bath at 80°C for 4h. The mixture was put into a stainless steel crystallization kettle lined with polytetrafluoroethylene, and the temperature was raised to 170° C. for static crystallization for 20 h. Cool to room temperature after crystallization, stir evenly and set aside.

[0086] Pre-hydrolysis of silicon-aluminum source: Add 5 g of the above-mentioned nanocrystalline precursor solution and 5 g of tetraethyl orthosilicate to 18 g of hydrochloric acid solution, adjust the pH value of the solution to 2, perform pre-hydrolysis at 60° C. for 5 h, and then let stand for 4 h.

[0087] Composite molecular sieve preparation: Slowly add the pre-hydrolysis solution to the template agent F127 solution (0.15g F127 dissolved in 42g 0.5M hydrochloric acid solution), 0....

Embodiment 2

[0091] This example provides a SBA-16 / MOR composite molecular sieve carrier material, the preparation steps are the same as in Example 1, only some parameters are adjusted, as follows:

[0092] Preparation of MOR nanocrystal precursor solution: Weigh 6.5g of activated diatomite, 4g of 600°C activated bauxite, and 7g of NaOH, dissolve 0.1g of seed crystal in 60g of deionized water, and then age in a water bath at 80°C for 4h. The mixture was put into a stainless steel crystallization kettle lined with polytetrafluoroethylene, heated to 170°C for static crystallization for 20 h. After the crystallization is completed, cool to room temperature, stir evenly and set aside.

[0093] Pre-hydrolysis of the silicon-aluminum source of the composite material: Add 5 g of the above-mentioned nanocrystalline precursor solution and 5 g of methyl orthosilicate to 20 g of hydrochloric acid solution, then adjust the pH value of the solution to 4, perform pre-hydrolysis at 60 ° C for 5 hours, an...

Embodiment 3

[0098] This example provides a SBA-16 / MOR composite molecular sieve carrier material, the preparation steps are the same as in Example 1, only some parameters are adjusted, as follows:

[0099] Preparation of MOR nanocrystal precursor solution: Weigh 7.2g of activated diatomite, 1.5g of bauxite activated at 600°C, 2.4g of rectorite, and 6g of NaOH, and dissolve 0.1g of seed crystal in 60g of deionized water. After aging in a water bath at 80°C for 4h, the mixture was put into a stainless steel crystallization kettle lined with polytetrafluoroethylene, and heated to 170°C for static crystallization for 24h. Cool to room temperature after crystallization, stir evenly and set aside.

[0100] Pre-hydrolysis of silicon-aluminum source of composite materials: Add 5 g of the above-mentioned nanocrystalline precursor solution and 4 g of methyl orthosilicate to 20 g of nitric acid solution, then adjust the pH value of the solution to 6, perform pre-hydrolysis at 60 ° C for 5 hours, and...

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Abstract

The invention relates to the field of petroleum processing, discloses a preparation method of a novel SBA-16 / MOR composite molecular sieve material and application in double branched chain isomerization for the first time, and in particular relates to a low-cost green preparation method of an SBA-16 / MOR composite molecular sieve material with suitable acidity and a three-dimensional stepped pore channel structure and a double-branched-chain isomerization catalyst prepared by loading non-noble metal on the SBA-16 / MOR composite molecular sieve material. The catalyst is applied to a catalytic cracking (FCC) gasoline hydroisomerization reaction. According to the catalyst, natural minerals are used as raw materials for green synthesis of an MOR molecular sieve nanocrystalline precursor solution without a template agent, and then an SBA-16 / MOR composite molecular sieve carrier is prepared through in-situ assembly by adopting a prehydrolysis method under low acidity, so that the production cost is greatly reduced, the equipment damage is relieved, and the pollutant emission is reduced. Therefore, the method provided by the invention has good economic and environmental benefits, and provides technical support for upgrading the quality of oil products in China.

Description

technical field [0001] The invention relates to the field of petroleum processing, in particular to a preparation method of a novel SBA-16 / MOR composite molecular sieve material and its application in double branched chain isomerization. Background technique [0002] Since 2019, my country has gradually implemented the strict national VIA gasoline emission standards across the country. This measure will further increase the requirements for oil quality upgrading technology. Catalytic cracking (FCC) gasoline has always been the most popular gasoline in my country. The main blending component of gasoline, but its olefin content is high. The main difficulty in upgrading the quality of oil products in my country is to reduce gasoline olefins while maintaining octane number. Isomerized oil has high octane number and low sulfur content, and does not contain olefins, aromatics, and benzene. Therefore, alkane isomerization technology has become a research hotspot in the field of prod...

Claims

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Application Information

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IPC IPC(8): B01J29/80B01J29/03B01J29/18B01J29/24B01J29/26B01J35/10C10G45/64
CPCB01J29/80B01J29/18B01J29/26B01J29/0308B01J29/0341B01J29/0333B01J29/24C10G45/64C10G2400/02B01J35/617B01J35/647
Inventor 岳源源康颖鲍晓军王廷海向永生常晓昕姚文君张永泽谢元李景锋高海波王高峰
Owner PETROCHINA CO LTD
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