Hydroisomerization catalyst and preparation method thereof
A hydroisomerization and catalyst technology, which is applied in catalyst activation/preparation, physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, etc., can solve problems such as low activity, achieve simple operation, Effects of high hydrogenation activity, isomerization selectivity, and high activity stability
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preparation example Construction
[0020] According to the preparation method of the hydroisomerization catalyst provided by the present invention, the preparation method comprises the following steps:
[0021] (1) The water-soluble salt of the hydrogenation metal active component and the organic complexing agent are loaded on the carrier by the impregnation method, then dried and roasted to obtain a semi-finished catalyst, and the roasting conditions are such that the total amount of the semi-finished catalyst is used as a benchmark , the carbon content in the semi-finished catalyst is 0.03-0.5% by weight;
[0022] (2) using the solution containing the organic complexing agent as the impregnating liquid, the semi-finished catalyst obtained in step (1) is impregnated, then dried without roasting;
[0023] Wherein, the carrier contains inorganic heat-resistant oxides and mesoporous molecular sieves.
[0024] According to the present invention, preferably, the calcination condition in step (1) is such that the c...
Embodiment approach
[0060] According to a preferred embodiment of the present invention, the inorganic heat-resistant oxide is alumina, and more preferably the carrier is alumina and mesoporous molecular sieve (ie, alumina-mesoporous molecular sieve).
[0061] According to a preferred embodiment of the present invention, based on the total amount of the carrier, the content of the mesoporous molecular sieve in the carrier is 2-75% by weight, preferably 5-60% by weight.
[0062] According to a preferred embodiment of the present invention, the carrier is alumina and mesoporous molecular sieve, based on the total amount of the carrier, the content of mesoporous molecular sieve in the carrier is 2-75% by weight, preferably 5% by weight. -60% by weight, the content of alumina is 25-98% by weight, preferably 40-95% by weight.
[0063] In the present invention, the mesoporous molecular sieve refers to a zeolite molecular sieve with a ten-membered ring structure, preferably selected from SAPO-11, SAPO-3...
preparation example 1
[0073] Preparation of mesoporous molecular sieves: SAPO-11 molecular sieves were synthesized according to the method of Example 16 in US4440871. Weigh 230.6g of phosphoric acid (85% by weight), add 440.0g of distilled water, 144.0g of pseudoboehmite (dried rubber powder produced by the Catalyst Factory of Changling Refining and Chemical Company, 71% by weight on a dry basis), stir well to obtain the mixture P1 . Weigh 649.2 g of 40% by weight aqueous solution of hydroxytetra-n-butylamine and 26.0 g of fumed silica gel (92.8% by weight of silicon oxide content, 7.2% by weight of water content), and stir evenly to obtain a mixture P2. The mixtures P1 and P2 were mixed, and 102.0 g of di-n-propylamine was added with stirring to obtain a reaction mixture. The reaction mixture was put into a polytetrafluoroethylene-sealed reaction kettle, crystallized at 200°C for 24 hours, filtered, washed to neutral, and dried at 120°C to obtain SAPO-11 molecular sieve (net content 85.0% by weig...
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