Preparation method for isodewaxing catalyst
A technology of isomerization dewaxing and catalyst, which is applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., to achieve the effects of high yield, low pour point and high metal dispersion
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Embodiment 1
[0026] (1) Synthesis of ZSM-22 molecular sieve
[0027] The ZSM-22 molecular sieve was synthesized according to the patent US4556477. ① 28.6g silica sol (30wt% SiO 2 ) and 29.8g deionized water are mixed evenly; ② 1g aluminum sulfate (17.2wt%Al 2 o 3 ), 2.3g of potassium hydroxide and 52.3g of deionized water were mixed evenly; ③Mix and stir the ① and ② solutions for 15min, then add 5g of hexamethylenediamine into the mixed solution and stir; ④Put the ③ solution into a stirring In a high-pressure reactor, heat to 160°C, stir and react for 72h; ⑤After washing and filtering, the filter cake is dried at 110°C for 10h to obtain SiO 2 / Al 2 o 3 ZSM-22 molecular sieve raw powder with a molar ratio of about 60.
[0028] (2) Molecular sieve modification:
[0029] ①Calcinate ZSM-22 raw powder at 600℃ for 6h; ②Use 0.3mol / L NH 4 NO 3 The aqueous solution performs ion exchange on the molecular sieve. The exchange conditions are: the mass ratio of solid to liquid is 1:10, the exc...
Embodiment 2
[0031] (1) Synthesis of ZSM-23
[0032] The synthesis of ZSM-23 is according to the disclosed method of U.S. Patent No. 4,076,842: 1. 3.3g sodium metaaluminate (43.1wt%Al 2 o 3 , 33.1 wt% Na 2 O and 24.7 wt% H 2 O), 30g deionized water and 0.34gNaOH (50wt% aqueous solution) are mixed, stirred evenly, then add 18.2g pyrrolidine and continue to stir; ② 164.8g silica sol (30% SiO 2 ,70%H 2 0) add the above solution and stir until a gel is formed; ③ put the above gel into an autoclave to heat and stir, and continuously crystallize at 180° C. for 7 days; ④ wash and filter the product until the filtrate is neutral, Dry the filter cake at 110°C for about 16 hours to obtain SiO 2 / Al 2 o 3 ZSM-23 molecular sieve raw powder with a molar ratio of about 60.
[0033] (2) Molecular sieve modification method According to the method of Example 1, H-ZSM-23 was obtained.
Embodiment 3
[0035] Synthesis of SAPO-11 molecular sieve is carried out according to patent CN103043683B: ① 2g hexadecyl triethoxy organosilicon quaternary ammonium salt is dissolved in 18g ethanol; ② 23.1g phosphoric acid (AR, 85%) is mixed with 72.0g deionized water in Mix well in a water bath at 38°C, add 15.2g of pseudoboehmite (Shandong aluminum powder, aluminum oxide content 67%), stir in a water bath at 38°C for 0.5h to obtain aluminum phosphate sol; then slowly add 11.2g of Propylamine (DPA, AR, 99%) continued to stir for 0.5h; added 6.3g tetraethyl orthosilicate (AR, 99%), continued to stir for 0.5h, then added 20g of ① solution, continued to stir for 2h; ④ put the above solution into high pressure In the reaction kettle, aged at 130°C for 2h, then heated to 190°C, and crystallized for 36h; ⑤The obtained crystals were washed and filtered and then dried at 120°C for 12h to obtain the original SAPO-11 molecular sieve powder; ⑥The original powder was heated at 600 Calcined at ℃ for 6...
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