Silicoaluminophosphate molecular sieve catalyst, preparation method, and use thereof

A silicoaluminophosphate, catalyst technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of high environmental protection pressure, environmental pollution, increased cost, etc., and achieve the effect of low cost and environmental friendliness

Active Publication Date: 2011-12-28
CHNA ENERGY INVESTMENT CORP LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the hydrothermal crystallization process of synthesizing molecular sieves, a large amount of crystallization raffinate will be produced. These crystallization raffinate cannot be directly discharged due to the harmful components of organic amines and phosphorus, and the treatment of these raffinate will consume more financial resources, manpower and resources. Material resources an

Method used

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  • Silicoaluminophosphate molecular sieve catalyst, preparation method, and use thereof
  • Silicoaluminophosphate molecular sieve catalyst, preparation method, and use thereof
  • Silicoaluminophosphate molecular sieve catalyst, preparation method, and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] With the 85% phosphoric acid of 443g, the pseudo-boehmite of 780g, the 40% silica sol of 171g, the triethylamine of 582g, the deionized water of 1784g, 400g kaolin according to figure 1 The process shown is carried out, wherein the aging conditions are: temperature: 25°C, time: 4 hours; the crystallization conditions are: temperature: 200°C, time: 48 hours; add 120g of dilute nitric acid (20%) to the obtained crystallization solution and mix , Mixed solution aging conditions: temperature: 25°C, time: 2 hours; after aging, the slurry is sprayed. Spray drying conditions: inlet temperature: 260°C, outlet temperature: 170°C. The obtained samples were roasted in a retort furnace, the roasting conditions: temperature: 550° C., time: 7 hours.

Embodiment 2

[0078] 400g of 85% phosphoric acid, 800g of pseudoboehmite, 180g of 40% silica sol, 600g of triethylamine, 2000g of deionized water, and 400g of kaolin according to figure 1 The process shown is carried out, wherein the aging conditions are: temperature: 25°C, time: 2 hours; crystallization conditions are: temperature: 200°C, time: 50 hours; add 150g of dilute nitric acid (20%) to the obtained crystallization solution and mix , Mixed solution aging conditions: temperature: 25°C, time: 2 hours; after aging, the slurry is sprayed. Spray drying: inlet temperature: 250°C, outlet temperature: 160°C. The obtained samples were calcined in a kettle furnace, the calcining conditions: temperature: 600° C., time: 6 hours.

Embodiment 3

[0080] 400g of 85% phosphoric acid, 850g of pseudoboehmite, 200g of 40% silica sol, 600g of triethylamine, 2000g of deionized water, and 400g of kaolin according to figure 1 The process shown is carried out, wherein the aging conditions are: temperature: 25°C, time: 2 hours; crystallization conditions are: temperature: 200°C, time: 50 hours; add 100g of dilute nitric acid (20%) to the obtained crystallization solution and mix , Mixed solution aging conditions: temperature: 25°C, time: 2 hours; after aging, the slurry is sprayed. Spray drying: inlet temperature: 250°C, outlet temperature: 160°C. The obtained samples were calcined in a kettle furnace, the calcining conditions: temperature: 600° C., time: 6 hours.

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PUM

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Abstract

The invention relates to a silicoaluminophosphate molecular sieve catalyst, a preparation method, and a use thereof. The invention relates to a preparation method for a silicoaluminophosphate molecular sieve catalyst. The method comprises the following steps: (a) preparing a mixed solution containing a template agent, silicon source, aluminum source, phosphorus source, and a matrix material; (b) optionally, aging the mixed solution; (c) carrying out crystallization for the optionally-aged mixed solution through a hydrothermal crystallization method; (d) optionally, mixing the crystallized mixed solution and a peptizing agent to form a uniform slurry; (e) carrying out a forming treatment for the crystallized mixed solution from the step (c) or the uniform slurry from the step (d) to obtainthe formed product; (f) baking the formed product to obtain the silicoaluminophosphate molecular sieve catalyst. The invention further relates to the silicoaluminophosphate molecular sieve catalyst prepared through the method, the use of the silicoaluminophosphate molecular sieve catalyst as a catalyst for preparation of methanol through olefin, and a method for preparing methanol through olefin.The method provided by the present invention has characteristics of environmental friendliness and low cost.

Description

technical field [0001] The invention provides a silicoaluminophosphate molecular sieve catalyst, especially a SAPO-34 molecular sieve catalyst, its preparation method and application. Background technique [0002] The new series of silicoaluminophosphate molecular sieves (US4440871, US 4499327)-SAPO-n molecular sieves researched and developed by United Carbide Corporation (UCC) in 1984 are based on organic amines as templates, hydrated alumina, phosphoric acid, silicon The sol is an aluminum source, a phosphorus source and a silicon source, and is obtained by first obtaining an organic amine / aluminum phosphate / silicon complex with a microporous phase by hydrothermal crystallization, and then removing the template (organic amine) by roasting. SAPO-34 molecular sieve is one of them, its structure is similar to chabazite, it has three-dimensional intersecting channels, the pore diameter is about 0.38nm, and it belongs to the cubic crystal system. Due to its suitable proton aci...

Claims

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Application Information

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IPC IPC(8): B01J29/85C07C11/04C07C11/06C07C1/20
CPCY02P20/52Y02P30/20Y02P30/40
Inventor 朱伟平岳国薛云鹏李飞李艺
Owner CHNA ENERGY INVESTMENT CORP LTD
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