Titanium-silicon molecular screen with MWW structure and its synthesis and application
A technology of titanium-silicon molecular sieve and molecular sieve, which is applied in the application field and can solve the problems of no titanium-silicon molecular sieve
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Embodiment 1
[0055] In the first step, the molar ratio of TiO in the titanium source 2 : SiO in silicon source 2 : M in mineralizer 2 O: organic templating agent: H 2O is 0.03:1:0.5:0.56:43 to prepare a reaction mixture, which is hydrothermally crystallized at 150°C for 5 days, filtered, washed, and dried to obtain an intermediate crystalline material, and the titanium source is tetrabutyl titanate Esters, silicon source is silica gel, mineralizer is potassium carbonate, organic template is the mixture of TMAdaOH and hexamethyleneimine, the mol ratio of TMAdaOH and hexamethyleneimine is 1: 1.15; In the second step, The intermediate crystalline material obtained in the first step is mixed with a concentration of 2mol / l nitric acid solution in a weight ratio of 1:50, treated at 100°C for 20 hours, filtered, washed, and dried to obtain an acid-treated product; the third In the first step, the acid-treated product obtained in the second step was roasted at 550° C. for 8 hours to obtain the ...
Embodiment 2~8
[0059] Implementation process is except following difference, and all the other are all the same with embodiment 1:
[0060] In the first step, the molar ratio composition of reaction mixture:
Embodiment 2
[0061] Example 2 0.10TiO 2 :SiO2 2 :0.5M 2 O:0.6Organic template agent:43H 2 O, hydrothermal crystallization at 170°C for 10 days;
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