A kind of method for producing sapo molecular sieve

A molecular sieve and hydrothermal technology, applied in the direction of molecular sieve and alkali-exchanged phosphate, molecular sieve characteristic silicoaluminophosphate, etc., can solve the problems of difficult solid-liquid separation in the industrial production of SAPO molecular sieve, avoid clogging, improve separation speed, and treat volume increase effect

Active Publication Date: 2021-09-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies in the prior art, the present invention provides a production method that solves problems such as the difficulty of solid-liquid separation in the industrial production of SAPO molecular sieves. By adding an acidic solution to the crystallization mother liquor, the solid-liquid separation of the mother liquor is effectively realized.

Method used

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  • A kind of method for producing sapo molecular sieve

Examples

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Comparison scheme
Effect test

Embodiment 1

[0030] Weigh 500 g of industrially produced SAPO-11 molecular sieve crystallization solution, add 20 g of 30% phosphoric acid solution, mix and perform vacuum filtration at a rate of 40 g / min, and then wash with water for several times. The obtained solid is dried to obtain the raw powder of SAPO-11 molecular sieve. Characterized by XRD, the crystallinity is 98%.

Embodiment 2

[0032] Weigh 500 g of industrially produced SAPO-11 molecular sieve crystallization solution, add 20 g of 45% phosphoric acid solution, mix and perform vacuum filtration at a rate of 70 g / min, and then wash with water for several times. The obtained solid is dried to obtain the raw powder of SAPO-11 molecular sieve. Characterized by XRD, the crystallinity is 96%.

Embodiment 3

[0034] Weigh 500 g of industrially produced SAPO-11 molecular sieve crystallization solution, add 30 g of 55% phosphoric acid solution, mix and perform vacuum filtration at a rate of 75 g / min, and then wash with water for several times. The obtained solid is dried to obtain the original SAPO-11 molecular sieve powder. Characterized by XRD, the crystallinity is 96%.

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Abstract

The invention discloses a method for industrially producing SAPO molecular sieves, which comprises the following steps: mixing the synthesized SAPO molecular sieve crystallization liquid with an acidic solution, and then separating, washing and drying the obtained solid phase to obtain molecular sieve raw powder, wherein , the solvent includes phosphoric acid solution. The method provided by the invention has important value for improving industrial production efficiency.

Description

technical field [0001] The invention provides a production method of SAPO molecular sieves, in particular to a method for realizing effective solid-liquid separation of SAPO-11 molecular sieves from crystallization mother liquor by adding reagents. Background technique [0002] In 1982, Union Carbide Corporation of the United States successfully synthesized aluminum phosphate molecular sieve AIPO-n, which is composed of AlO2 and PO2 tetrahedrons alternately, and does not have B acidity because it has no exchangeable charges. Si atoms are introduced into the framework of aluminum phosphate molecular sieves to form silicoaluminophosphate SAPO-n molecular sieves. The framework is composed of Si, P, Al, and O elements, so that the original electrically neutral aluminum phosphate molecular sieves have exchangeable charges and form B acidic centers. Therefore, it can be widely used in various refining and chemical industries such as catalytic cracking, alkylation of branched aroma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/54C01B37/08
CPCC01B37/08C01B39/54C01P2002/72C01P2006/90
Inventor 刘艳惠任行涛栗同林杨光张利霞裴庆君
Owner CHINA PETROLEUM & CHEM CORP
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