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Preparation method of SAPO-34 molecular sieve

A technology of SAPO-34 and molecular sieve, which is applied in the direction of molecular sieve characteristic silicoaluminophosphate, molecular sieve and alkali-exchanged phosphate, etc., can solve the problems of increased production cost and narrow synthesis range, and achieve improved utilization rate, huge industrial application prospects, The effect of increasing usage

Active Publication Date: 2016-12-07
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the industrial synthesis route of SAPO-34 is still the hydrothermal method, because other synthesis routes involve the use of organic solvents, which increases the production cost, and the applicable synthesis range is narrow

Method used

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  • Preparation method of SAPO-34 molecular sieve
  • Preparation method of SAPO-34 molecular sieve
  • Preparation method of SAPO-34 molecular sieve

Examples

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preparation example Construction

[0027] The invention discloses a preparation method of SAPO-34 molecular sieve. The molecular sieve is synthesized by solid-phase grinding, which includes the following steps: firstly, the reaction raw materials silicon source, aluminum source, template agent R1 and water are ground for 10-20 minutes, and then put into Carry out the crystallization reaction in the reaction kettle; after the crystallization is completed, cool at room temperature, wash with deionized water until neutral, and dry in the air at 80°C to obtain the original molecular sieve powder; roast the original molecular sieve powder in the air at 600°C for 4 hours, Obtain final product; The addition amount of each reaction raw material should make the molar ratio of each composition when crystallization reaction is: Al 2 o 3 : SiO 2 :H 2 O: R1 is 0.5~1.5:0.4~1.0:1.2~3.6:1.0~2.0, wherein the templating agent R1 is selected from tetraethylenepentamine phosphate TEPA·H 3 PO 4 , Diethylene triamine phosphate D...

Embodiment 1

[0033] Example 1: Slowly drop 11.53 g of phosphoric acid into 3.89 g of tetraethylenepentamine, add 30 mL of ethanol, stir for 3 hours, and reflux the ethanol at 80° C. to obtain a light yellow solid. Then wash with ether and ethanol 3 to 4 times, and finally dry it.

Embodiment 2

[0034] Example 2: Slowly drop 11.53 g of phosphoric acid into 5.44 g of tetraethylenepentamine, add 30 mL of ethanol, stir for 3 hours, and reflux the ethanol at 80° C. to obtain a light yellow solid. Then wash with ether and ethanol 3 to 4 times, and finally dry it.

[0035] Synthesis of Diethylenetriamine Phosphate DETA·H 3 PO 4 :

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Abstract

The invention relates to a preparation method of an SAPO-34 molecular sieve. A solid phase is ground and synthetized into the molecular sieve. The preparation method specifically comprises the following steps of (1) pouring a silicon resource, an aluminum source, a template and water into a mortar for grinding and mixing so as to obtain a mixture, and loading the uniformly ground mixture into a reaction kettle for a crystallization reaction; (2) after crystallization is completed, performing cooling, performing washing with ionized water until the washed mixture is neutral, and performing drying so as to obtain molecular sieve raw powder; and (3) roasting the molecular sieve raw powder in the air, so as to obtain products, wherein the silicon resource is white carbon black or silica gel ; the aluminum source is boehmite or aluminum hydroxide, and the template is one or more of tetraethylenepentamine phosphate TEPA.H3PO4. diethylenetriamine phosphate DETA.H3PO4 or diethylamine phosphate DEA.H3PO4.

Description

technical field [0001] The invention relates to a method for preparing molecular sieves, in particular to a method for synthesizing molecular sieves through solid-phase grinding. Background technique [0002] In the early 1880s, Wilson S.T. and Flanigen E.M. of Union Carbide Corporation (U.C.C) successfully synthesized aluminum phosphate molecular sieves and their derivatives series (AlPO 4 -n,SAPO 4 -n and MeAPO-n, etc.), among which SAPO-n series silicon phosphorus aluminum molecular sieves have certain ion exchange capacity and acidity, coupled with their diverse structures and unique properties, have been widely used in the field of catalytic industry. Phosphosilicate SAPO-34 molecular sieve is a molecular sieve with a chabazite-like structure composed of phosphorus, silicon, aluminum and oxygen. Due to its unique small pore structure and suitable acidity, it can be used in catalytic methane to light olefins ( MTO) reaction has better catalytic activity. At present, t...

Claims

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Application Information

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IPC IPC(8): C01B37/08C01B39/54
Inventor 盛娜孟祥举胡清勋肖丰收王久江王宝杰赵红娟赵晓争张莉熊晓云刘明霞高永福曹庚振侯凯军滕秋霞田爱珍
Owner PETROCHINA CO LTD
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