Method for compounding multistage hole mesh molecular sieves
A network molecule and synthesis method technology, applied in the direction of molecular sieve compounds, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of limited application, low hydrothermal stability, single mesoporous structure, etc., and achieve novel shape and shape The effect of high profile and profile hydrothermal stability
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[0016] The embodiment of the present invention provides a method for synthesizing a multi-stage mesh molecular sieve, comprising the steps of:
[0017] Add a certain amount of P123 into the dilute hydrochloric acid solution, add OP-10 and water in proportion, heat and stir in a water bath at a certain temperature, then add a certain amount of ethyl orthosilicate, continue stirring, and then add a certain amount of KF, Put it into a stainless steel reaction kettle, take it out and cool it after crystallization, filter it with suction, dry it to obtain a silicon-containing sample, and finally air roast it in a muffle furnace to obtain a white powder.
[0018] Among them, in this application document:
[0019] P123, Chinese name: polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer, chemical formula PEO-PPO-PEO;
[0020] OP-10, Chinese name: alkylphenol polyoxyethylene ether;
[0021] Tetraethyl orthosilicate (TEOS), molecular formula Si(OC 2 h 5 ) 4 ...
Embodiment approach
[0024] Preferably, as an implementable mode, the method includes:
[0025] Step S110, dissolving P123 in dilute hydrochloric acid to form a first solution, taking OP-10 and dissolving it in water to form a second solution, mixing the first solution and the second solution, and stirring magnetically in a water bath at 36.5°C-37.5°C for 85 -95 minutes, then add ethyl orthosilicate and potassium fluoride to form the third solution, the consumption ratio of P123, OP-10, ethyl orthosilicate and potassium fluoride should make the mol ratio in the third solution be: OP- 10:P123:KF:SiO 2 :HCl:H 2 O=0.0085:0.017:0.01:1:5.8:197.
[0026] According to the above molar ratios, the proportions of P123, hydrochloric acid and other raw materials can be accurately obtained through calculation, and there are many ways to realize them, which are not listed in the embodiments of the present invention.
[0027] Step S111, after continuing to stir the third solution for 5.8-6.2 hours, put it int...
Embodiment 2
[0029] More preferably, as a preferred embodiment, the method includes the steps of:
[0030] Step S210, weigh 1g of P123 and dissolve it in 30ml of 2mol / L hydrochloric acid to form a first solution, then weigh 0.055g of OP-10 and dissolve it in 7.5ml of water to form a second solution, mix the two After mixing, stir magnetically in a water bath at 37°C for 1.5 h, then add 2.43 ml of ethyl orthosilicate and 0.01 g of potassium fluoride to form a third solution.
[0031] Step S211, after continuing to stir the third solution for 6 hours, put it into a stainless steel reaction kettle lined with polytetrafluoroethylene, crystallize at 100°C for 24 hours, cool at room temperature, wash with distilled water, and suction filter, Drying and calcining in air at 550° C. for 6 hours to obtain a multi-level mesh molecular sieve.
[0032] Throughout this article, unless otherwise specified, g is the unit of mass in gram, ml is the unit of volume in milliliter, h is the unit of time in ho...
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