Fischer-Tropsch synthesis wax hydrocracking catalyst, preparation method thereof, and Fischer-Tropsch synthesis wax hydrocracking method

Abstract

The invention belongs to the field of Fischer-Tropsch synthesis catalytic hydrocracking, and discloses a Fischer-Tropsch synthesis wax hydrocracking catalyst, a preparation method thereof, and a Fischer-Tropsch synthesis wax hydrocracking method. The preparation method of the Fischer-Tropsch synthesis wax hydrocracking catalyst comprises following steps: 1, amorphous silicon aluminium and a binderare subjected to mixing kneading, strip extrusion moulding, primary drying, and primary roasting to obtain a catalyst carrier; and 2, the catalyst carrier is immersed in a dipping solution containinghydrogenation active metal elements and a competitive adsorbent, and secondary drying and secondary roasting are carried out to obtain the Fischer-Tropsch synthesis wax hydrocracking catalyst, wherein the hydrogenation active metal elements contain at least one metal element selected from VIII family in the periodic table of elements, and at least one metal element selected from VIB family in theperiodic table of elements at the same time, and the volume amount of the dipping solution containing hydrogenation active metal elements accounts for 65 to 85% of the pile volume of the catalyst carrier. The hydrogenation active metal components of the catalyst are excellent in dispersibility, and intermediate fraction oil selectivity is high.

Description

technical field [0001] The invention relates to the field of Fischer-Tropsch synthesis catalytic hydrocracking, in particular to a preparation method of a Fischer-Tropsch synthesis wax hydrocracking catalyst, a Fischer-Tropsch synthesis wax hydrocracking catalyst prepared by the method, and the use of the Fischer-Tropsch synthesis wax for hydrogenation A method for hydrocracking Fischer-Tropsch synthesis wax with a cracking catalyst. Background technique [0002] Hydrocracking is an important oil processing method. It has good cracking selectivity and can flexibly adapt to changes in raw material and product requirements. Therefore, it is the most effective means for deep processing of Fischer-Tropsch synthesis product wax. The yield of Fischer-Tropsch wax in low-temperature Fischer-Tropsch synthesis is as high as 50% or more. Hydrocracking of Fischer-Tropsch wax is required for lightening to produce fractions such as jet fuel and diesel. The selectivity of middle distillat...

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Problems solved by technology

[0011] The purpose of the present invention is to provide a Fischer-Tropsch synthetic wax hydrocracking catalyst and a preparation method thereof and a cost-effective method for overcoming the problems of low selectivity of middle distillates, poor dispersion of hydrogenation active metals, and need for post-treatment after impregnation in the prior art. A method for hydrocracking of Tropsch synthesis wax, the Fischer-Tropsch synthesis wax hydrocracking catalyst prepared by the method has good dispersion of hydrogenation metal active components, and the Fischer-Tropsch synthesis wax hydrocracking catalyst of the present invention is used for Fischer-Tropsch synthesis hydrogenation Higher middle distillate selectivity when cracking

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