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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Problems solved by technology

At present, the industrial synthesis route of SAPO-34 is still the hydrothermal method, because other synthesis routes

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

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Example Embodiment

[0027] The invention discloses a preparation method of SAPO-34 molecular sieve. The molecular sieve is synthesized by solid-phase grinding. The molecular sieve is synthesized by solid-phase grinding. The molecular sieve includes the following steps: firstly grinding the reaction raw materials silicon source, aluminum source, template R1 and water for 10-20 minutes, and grind uniformly before loading The crystallization reaction is carried out in the reactor; after the crystallization is completed, it is cooled at room temperature, washed with deionized water to neutrality, and dried in the air at 80°C to obtain the original molecular sieve powder; the original molecular sieve powder is roasted in the air at 600°C for 4 hours, The final product is obtained; the addition amount of each reaction raw material should be such that the molar ratio of each component during the 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 tem...

Example Embodiment

[0033] Example 1: 11.53 g of phosphoric acid was slowly dropped into 3.89 g of tetraethylenepentamine, 30 mL of ethanol was added, stirred for 3 hours, and the ethanol was refluxed at 80° C. to obtain a light yellow solid. Then wash with ether and ethanol 3 to 4 times, and finally dry.

Example Embodiment

[0034] Example 2: 11.53g phosphoric acid was slowly dropped into 5.44g tetraethylenepentamine, 30mL ethanol was added, stirred for 3 hours, and ethanol refluxed at 80°C to obtain a light yellow solid. Then wash with ether and ethanol 3 to 4 times, and finally dry.

[0035] Synthesis of Diethylene Triamine 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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