Fractional crystallization synthesis method for high-content skeleton iron ZSM-35 molecular sieve
A ZSM-35, chemical synthesis technology, applied in the direction of iron conglomerate crystalline aluminosilicate zeolite, crystalline aluminosilicate zeolite, etc., can solve the problems of complex synthesis method, low crystallinity, long crystallization time, etc. , to achieve the effect of simplifying the operating conditions, simplifying the synthesis process, and reducing the difficulty of production
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Embodiment 1
[0043] The first stage (I): Add 0.52ml of 1M NaOH solution and 0.44ml of 1M KOH solution to 2.02g of silica sol, add 5.50g of water after dissolving the silica sol by increasing heat; dissolve 0.08g of sodium aluminate in 5.00g of water, Add 0.51ml 1M NaOH solution and 0.43ml 1M KOH solution dropwise; slowly add sodium aluminate solution dropwise into the silicon source solution under stirring conditions to obtain a white colloid, then add 0.63ml FeCl 3 The solution was added to the white colloid, stirred for 2 hours, and finally 0.55ml of cyclohexylamine was added to obtain the initial gel. The material was placed in a stainless steel reactor lined with polytetrafluoroethylene, and crystallized at 220°C for 5 hours.
[0044] The first stage (II): In addition to adding FeCl 3 Solution, the remaining steps are the same as the first stage (I), and finally the material is placed in a stainless steel reactor lined with polytetrafluoroethylene, and crystallized at 220 ° C for 20 ho...
Embodiment 2
[0047] The first stage (I): Add 0.39ml 1M NaOH solution and 0.44ml 1M KOH solution dropwise to 2.02g silica sol, add 5.5g water after dissolving the silica sol by increasing heat; dissolve 0.11g sodium aluminate in 5.3g water, Add 0.38ml 1M NaOH solution and 0.43ml 1M KOH solution dropwise; slowly add the sodium aluminate solution dropwise into the silicon source solution under stirring conditions to obtain a white colloid, then add 0.16ml FeCl 3 The solution was added to the white colloid, stirred for 2 hours, and finally 0.55ml of cyclohexylamine was added to obtain an initial gel. The material was placed in a stainless steel reactor lined with polytetrafluoroethylene, and crystallized at 220°C for 4 hours.
[0048] The first stage (II): In addition to adding FeCl 3 Solution, the remaining steps are the same as the first stage (I), and finally the material is placed in a stainless steel reactor lined with polytetrafluoroethylene, and crystallized at 220 ° C for 22 hours.
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Embodiment 3
[0051] The first stage (I): Add 0.43ml 1M NaOH solution and 0.44ml 1M KOH solution dropwise to 2.02g silica sol, add 5.5g water after dissolving the silica sol by increasing heat; dissolve 0.10g sodium aluminate in 5.15g water, Add 0.43ml 1M NaOH solution and 0.43ml 1M KOH solution dropwise; slowly add the sodium aluminate solution dropwise into the silicon source solution under stirring conditions to obtain a white colloid, then add 0.32ml FeCl 3 The solution was added to the white colloid, stirred for 2 hours, and finally 0.55ml of cyclohexylamine was added to obtain an initial gel. The material was placed in a stainless steel reactor lined with polytetrafluoroethylene, and crystallized at 220°C for 6 hours.
[0052] The first stage (II): In addition to adding FeCl 3 Solution, the remaining steps are the same as the first stage (I), and finally the material is placed in a stainless steel reactor lined with polytetrafluoroethylene, and crystallized at 220 ° C for 18 hours.
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