High-yield Me-SSZ-98 type molecular sieve material, catalyst and application
A technology of SSZ-98 and me-ssz-98 is applied in the field of high-yield Me-SSZ-98 molecular sieve catalyst and its synthesis, which can solve the problems of low yield and expensive template agent, and achieve the effect of reducing manufacturing cost.
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[0033] A kind of synthetic method of high yield Me-SSZ-98 type molecular sieve catalyst, it is characterized in that: described method comprises the following steps:
[0034] (1) 1,1-dimethylazacyclohexyl chloride is used as a reaction template, and the template is dissolved in deionized water according to a solid-to-liquid ratio of 10-50%, and stirred evenly;
[0035] (2) Use strong basic hydroxyl anion as the exchange resin, fill the exchange resin into the chromatographic column, add the solution prepared in step (1) into the chromatographic column, exchange 1-10 beds through the column, and obtain the filtered solution . The used exchange resin can be regenerated with strong alkali and recycled, which further reduces the production cost compared with the existing technology;
[0036] (3) Add silicon dioxide source dropwise to the filtered solution obtained in step (2) and stir evenly; the silicon dioxide silicon source includes but is not limited to orthosilicate, silica ...
Embodiment 1
[0046] Weigh 44.6g of 1,1-dimethylazacyclohexyl chloride and dissolve it in 90g of deionized water. After it is completely dissolved, transfer it to 300 ml of basic hydroxyl anion resin chromatography column and pass through 5 beds of the column, retain and filter solution. Add 74.5g of silica sol (LuDOX-40) dropwise to the above filtered solution and stir vigorously evenly, then add 1.62g of activated alumina, and continue stirring for 3h until the silicon source and aluminum source are completely dissolved. Weigh 6.2 g of KOH solution with a mass concentration of 45%, add it into the solution in which the silicon source and the aluminum source have been completely dissolved, and stir evenly to obtain a gel. Transfer the gel into an autogenous pressure reactor with a polytetrafluoroethylene liner, rotate and crystallize at 180°C for 8 hours, and perform a hydrothermal crystallization reaction. After the reaction, put the crystallization solution in a centrifuge to separate an...
Embodiment 2
[0049] Weigh 11.06g of 1,1-dimethylazacyclohexyl chloride and dissolve it in 44g of deionized water; after it is completely dissolved, transfer it to 100 milliliters of strong basic hydroxyl anion resin and put it in a chromatography column to pass through the column 4 beds, keep the filtered solution, add 1g Y-type zeolite (SiO 2 / Al 2 o 3 =30), stir evenly until the silicon source and the aluminum source are completely dissolved. Continue to add 4.4 g of NaOH solution with a mass concentration of 45%, and vigorously stir the gel until it is uniform. The gel was capped and placed in an autoclave reactor for a hydrothermal reaction at 200° C. for 6 h at a rotation speed of 30 rpm. After the reaction is finished, the above crystallization liquid is separated and filtered and washed until the filtered water is neutral, and the solid filter cake is dried at a constant temperature of 80°C for 24h, and calcined in a muffle furnace at 550°C for 4h to obtain SSZ-98 molecular siev...
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