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Preparation method of the B-Al-ZSM-11 zeolite catalyst and application thereof

A zeolite catalyst and zeolite technology are applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., to achieve the effects of slowing down further side reactions, improving diffusion performance, and simple synthesis process

Active Publication Date: 2014-10-15
CHAMBROAD CHEM IND RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few literatures on the synthesis of B-Al-ZSM-11 at present, and its use in methanol to propylene reaction has not been reported yet.

Method used

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  • Preparation method of the B-Al-ZSM-11 zeolite catalyst and application thereof
  • Preparation method of the B-Al-ZSM-11 zeolite catalyst and application thereof
  • Preparation method of the B-Al-ZSM-11 zeolite catalyst and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] At room temperature, 126.2g of tetrabutylammonium bromide and 439.2g of silica sol (30wt%) were dissolved in 100mL of water; under stirring, aqueous sodium hydroxide solution (16.4g of sodium hydroxide+200mL of water) was added dropwise, and stirred After 1 hour, add the aqueous solution of boric acid and sodium aluminate (54.4g boric acid + 0.3g sodium aluminate + 602ml water) and continue to stir for 1 hour, put it in a kettle, crystallize at 160°C for 3 days, filter, wash, and dry overnight at 100°C , B-Al-ZSM-11 was obtained after calcination at 540℃ for 6h. Raw materials used, in terms of molar ratio of pure substances, SiO in silicon source 2 : B in boron source 2 o 3 : Al in aluminum source 2 o 3 : TBA in the templating agent + : OH in alkali source - : Inorganic salt: H 2 O=1:0.2:0.00083:0.18:0.19:0:30.6.

[0031] figure 1 is the XRD pattern of the sample, it can be seen from the figure that the sample has a MEL structure;

[0032] figure 2 It is the...

Embodiment 2

[0034] At room temperature, 86g of tetrabutylammonium bromide and 330.4g of silica sol (30wt%) were dissolved in 400mL of water; under stirring, aqueous sodium hydroxide solution (10.6g of sodium hydroxide+200mL of water) was added dropwise thereto, and stirred for 3 hour, add the aqueous solution of boric acid and sodium aluminate (41.6g boric acid+0.48g aluminum sulfate+58g sodium chloride+500ml water) and continue to stir for 3 hours, put in a kettle, crystallize at 160°C for 3 days, filter, wash, 100 °C dried overnight, and then calcined at 580 °C for 1 h to obtain B-Al-ZSM-11. Raw materials used, in terms of molar ratio of pure substances, SiO in silicon source 2 : B in boron source 2 o 3 : Al in aluminum source 2 o 3 : TBA in the templating agent + : OH in alkali source - : Inorganic salt: H 2 O=1:0.2:0.00083:0.16:0.16:0.6:44.8.

Embodiment 3

[0036] At room temperature, 35.1g of tetrabutylammonium bromide and 131.8g of white carbon black were dissolved in 200mL of water; under stirring, aqueous sodium hydroxide solution (8.6g of sodium hydroxide + 100mL of water) was added dropwise thereto, and stirred for 2 hours, Add the aqueous solution of boric acid and sodium aluminate (2.1g sodium borate + 0.18g sodium aluminate + 95ml water) and continue to stir for 2 hours, put it in a kettle, crystallize at 160°C for 3 days, filter, wash, dry overnight at 100°C, 560 B-Al-ZSM-11 was obtained after calcination at ℃ for 3h. Raw materials used, in terms of molar ratio of pure substances, SiO in silicon source 2: B in boron source 2 o 3 : Al in aluminum source 2 o 3 : TBA in the templating agent + : OH in alkali source - : Inorganic salt: H 2 O=1:0.005:0.0005:0.05:0.1:0:10.

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Abstract

The invention provides a B-Al-ZSM-11 zeolite catalyst in the methanol to propylene reaction and a preparation method of the B-Al-ZSM-11 zeolite catalyst. In the invention, the method includes the following steps: a boron source, an aluminium source, a silicon source, an alkali source, an inorganic salt, a template and water are used as raw materials; the raw materials are subjected to crystallization, filtration, washing, drying and roasting; the ZSM-11 zeolite simultaneously containing boron, aluminium and silicon in the skeleton is synthesized by one step. The synthetic process is simple, the degree of crystallinity of the product is high, the content of skeleton boron and aluminium can be adjusted, and the acid strength of a molecular sieve can be effectively controlled; the B-Al-ZSM-11 zeolite synthesized by the method can be used for catalyzing the methanol to propylene reaction, and is higher in propylene selectivity and product P / E ratio (molar ratio of propylene to ethylene in the product) compared with B-Al-ZSM-5 or ZSM-11.

Description

technical field [0001] The invention belongs to the technical field of inorganic chemical synthesis, and relates to a silicon-boron-aluminum zeolite catalyst and a preparation method thereof, in particular to a B-Al-ZSM-11 zeolite catalyst used in methanol-to-propylene reaction and a preparation method thereof. Background technique [0002] As an important chemical raw material, propylene is widely used in the production process of polypropylene, propylene oxide, acrylonitrile and other chemical products. At present, propylene is mainly obtained from petroleum raw materials through steam cracking or catalytic cracking, and its price is affected by the price of petroleum. The continuous reduction of petroleum resource reserves and the increasing market demand for propylene make it necessary to develop a propylene production process that does not depend on petroleum. Methanol to propylene (MTP) technology has attracted more and more attention because it can use abundant coal ...

Claims

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Application Information

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IPC IPC(8): C01B39/36C01B39/10B01J29/40C07C11/06C07C1/20
CPCY02P20/52Y02P30/20Y02P30/40
Inventor 牟庆平郭新闻侯晓峰代成义栾波刘民张安峰姚刚
Owner CHAMBROAD CHEM IND RES INST CO LTD
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