Method for processing high-wax-content lubricant base oil
A lubricating oil base oil and content technology, which is applied in the direction of lubricating composition, hydrotreating process, base material, etc., can solve the problem of difficult isomerization of macromolecular macromolecular wax, low yield of reaction selective base oil, Low selectivity and other issues, to achieve the effect of low product pour point, high yield and simple overall process
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Embodiment 1
[0022] (1) Synthesis of ZSM-22 molecular sieve
[0023] 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; 3) 1) and 2) were mixed and stirred for 15 minutes, then 5g of hexamethylenediamine was added to the mixed solution and stirred; 4) 3) was mixed with Put it into a stirred high-pressure reactor, heat to 160°C, stir and react for 72h; 5) After 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.
[0024] (2) Molecular sieve modification:
[0025] 1) Roast ZSM-22 raw powder at 600°C for 6h; 2) Use 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 liqu...
Embodiment 2
[0027] (1) Synthesis of ZSM-23
[0028] The synthesis of ZSM-23 is according to the disclosed method of U.S. Patent US4076842: 1) 3.3g sodium metaaluminate (43.1wt%Al 2 o 3 , 33.1 wt% Na 2 O and 24.7 wt% H 2 0), 30g deionized water and 0.34gNaOH (50wt% aqueous solution) mix, stir well, 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) Heat and stir the above gel in an autoclave, and continuously crystallize it at 180°C for 7 days; 4) Wash and filter the product until the filtrate is medium properties, the filter cake was dried 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.
[0029] (2) Molecular sieve modification method According to the method of Example 1, H-ZSM-23 was obtained.
Embodiment 3
[0031] Composite molecular sieve ZM synthesis
[0032]Weigh 16g cetyltrimethylammonium bromide (CTAB), add 777g deionized water, stir until dissolved, then add 33.3g silica sol (30% SiO 2 , 70%H 2 O), 1.25g aluminum sulfate, 40g ZSM-23 molecular sieve powder, mix evenly, finally add a certain amount of NaOH to adjust the pH of the solution to 10-11, and continue to stir for 2h. The reaction liquid was put into a crystallization kettle, and crystallized at 120°C for 24 hours; the reaction product was cooled, washed, and dried to obtain a composite molecular sieve powder ZM. The mesoporous MCM-41 molecular sieve accounts for about 20 wt% of the composite molecular sieve.
[0033] Take 100g of composite molecular sieve ZM into a 2L beaker, add 1L of deionized water, and then add 24g of NH 4 NO 3 , stirred and heated to 90°C for 4 hours; then filtered, washed with water until neutral, dried at 120°C for 2 hours, and then calcined at 550°C for 4 hours to obtain H-ZM.
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