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Preparation method and application of hierarchical pore SAPO-11 molecular sieve and long-chain alkane isomerization catalyst

A technology of SAPO-11 and molecular sieves, applied in molecular sieve catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of SAPO-11 molecular sieves with large grain size, complicated preparation process and low isomerization activity, etc. Achieve the effects of improving mass transfer performance, reducing diffusion resistance, increasing activity and selectivity

Active Publication Date: 2021-03-23
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the present inventors have found that some hierarchically porous SAPO-11 molecular sieve-based alkane isomerization catalysts prepared by existing methods have deficiencies such as complex preparation process, large SAPO-11 molecular sieve crystal grains, low isomerization activity and poor selectivity.

Method used

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  • Preparation method and application of hierarchical pore SAPO-11 molecular sieve and long-chain alkane isomerization catalyst
  • Preparation method and application of hierarchical pore SAPO-11 molecular sieve and long-chain alkane isomerization catalyst
  • Preparation method and application of hierarchical pore SAPO-11 molecular sieve and long-chain alkane isomerization catalyst

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0045] A preparation method for a long-chain alkane isomerization catalyst, comprising the steps of:

[0046] (1) Add 1250g of water, 85g of methanol, 20.0g of PMMA with a particle size of 10-30μm, and 10.0g of C 16-2-16 Gemini surfactant ethylene-bis(hexadecyldimethylammonium chloride) and 238g pseudoboehmite (Al 2 o 3 Content 72%, mass percentage) and mix uniformly; then mix 387.5g phosphoric acid (85%, mass percentage) and 400g water and drop in the aforementioned emulsion, dropwise add and stir 4h; Then dropwise add templating agent di-n-propylamine 170.0g, stir 2h, then dropwise add 101g of silica sol (SiO 2 Content 30%, mass percentage), stirred for 4 hours, loaded into a kettle, crystallized at 200°C for 48 hours, then centrifuged, washed, dried overnight at 120°C, and calcined at 550°C for 24 hours to obtain a multi-order porous SAPO-11 molecular sieve.

[0047] (2) Take by weighing 140 g of the multi-stage porous SAPO-11 molecular sieve and 60 g of pseudo-boehmite ...

no. 2 example

[0050] A preparation method for a long-chain alkane isomerization catalyst, comprising the steps of:

[0051] (1) Add 1250g of water, 75g of ethanol, 30.0g of PMMA with a particle size of 5-30μm, and 2.5g of C 12-3-12 The Gemini surfactant propylene-bis(dodecyldimethylammonium chloride) and 238g pseudoboehmite (Al 2 o 3 Content 72%, mass percentage) and mix uniformly; then mix 387.5g phosphoric acid (85%, mass percentage) and 400g water and drop in the aforementioned emulsion, dropwise add and stir 4h; Then dropwise add templating agent di-n-propylamine 170.0g, stir 4h, then dropwise add 101g of silica sol (SiO 2 Content 30%, mass percentage), stirred for 2 hours, loaded into a kettle, crystallized at 200°C for 48 hours, then centrifuged, washed, dried overnight at 120°C, and calcined at 600°C for 24 hours to obtain a multi-order porous SAPO-11 molecular sieve.

[0052] (2) Take by weighing 140 g of the multi-stage porous SAPO-11 molecular sieve prepared in the present embo...

no. 3 example

[0055] A preparation method for a long-chain alkane isomerization catalyst, comprising the steps of:

[0056] (1) Add 1250g of water, 80g of propanol, 15.0g of PMMA with a particle size of 5-20μm, and 2.0g of C 14-2-14 Gemini surfactant ethylene-bis(tetradecyldimethylammonium chloride) and 238g pseudoboehmite (Al 2 o 3 Content 72%, mass percentage) and mix uniformly; then mix 387.5g phosphoric acid (85%, mass percentage) and 400g water and drop in the aforementioned emulsion, dropwise add and stir 4h; Then dropwise add templating agent di-n-propylamine 170.0g, stir 4h, then dropwise add 101g of silica sol (SiO 2 content 30%, mass percentage), stirred for 4 hours, loaded into a kettle, crystallized at 200°C for 48 hours, then centrifuged, washed, dried overnight at 120°C, and calcined at 550°C for 24 hours to obtain a multi-order porous SAPO-11 molecular sieve.

[0057] (2) Take by weighing 140g of the multi-stage porous SAPO-11 molecular sieve prepared in the present embodi...

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Abstract

The invention relates to the technical field of alkane isomerization catalysts, in particular to a preparation method and application of a hierarchical pore SAPO-11 molecular sieve and a long-chain alkane isomerization catalyst. The preparation method comprises the following steps: adding water, low-carbon alcohol, a Gemini surfactant and an organic pore-forming agent into a reaction kettle; thenadding phosphoric acid, a template agent and silica sol, conducting stirring, then putting the stirred material into a kettle for crystallization, washing, drying and roasting a crystallization product, then adding a binder and a molding aid for extrusion molding, loading a certain amount of active components on a carrier obtained by extrusion molding, and conducting drying and roasting to obtainthe long-chain alkane isomerization catalyst. In the preparation process, the low-carbon alcohol, the Gemini surfactant and the organic pore-forming agent are introduced to obtain the hierarchical pore SAPO-11 molecular sieve with small particle size, and the alkane isomerization catalyst prepared by taking the hierarchical pore SAPO-11 molecular sieve as the carrier is developed in pore passage and excellent in mass transfer performance, and has good isomerization activity and selectivity when being used for isomerization of long-chain alkane.

Description

technical field [0001] The invention relates to the technical field of alkane isomerization catalysts, in particular to a preparation method and application of a multi-level porous SAPO-11 molecular sieve and a long-chain alkane isomerization catalyst. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] With the development of industrial modernization and the improvement of people's living standards, motor vehicles and construction machinery in northern my country need to use a large amount of -20# and -35# diesel every year, and the market has a relatively large demand for low freezing point diesel. The long-chain n-paraffin components in diesel oil are the main reason for t...

Claims

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Application Information

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IPC IPC(8): B01J29/85C10G45/62
CPCB01J29/85C10G45/62B01J2229/186C10G2300/1081Y02P30/40Y02P30/20
Inventor 赵雷赵婉宇李淼周希刚
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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