Hydrogenation catalysts and its manufacturing method and use

Abstract

The invention relates to a hydrogenation catalyst; alumina powder with an average grain diameter of 25nm and alumina powder with an average grain diameter of 250 Mu m are selected as carriers of the catalyst; the mixing ratio of the nanometer alumina powder to the micron alumina powder is 1 : 8 to 12. The catalyst carries the elements of Mo, Co, Cr, K, Cu, P, B and F; wherein, the contents of the elements are: 5.0 percent to 18.0 percent of Mo, 1.5 percent to 3.0 percent of Co, 1.5 percent to 2.5 percent of Cr, 1.2 percent to 2.0 percent of K, 1.2 percent to 2.0 percent of Cu, 1.5 percent to 2.5 percent of P, 0.8 percent to 1.2 percent of B and 0.5 percent to 1.0 percent of F. The specific surface of the catalyst is 200m<2> / g to 450m<2> / g; the pore volume is 0.4ml / g to 0.75ml / g; the average aperture distribution is 20nm to 60nm; the crushing strength is 120N / cm<2> to 260N / cm<2>. When used in gasoline hydrofining, the catalyst of the invention can work under a normal hydrogenation operation condition without needing a special working situation; the operation condition is tempered; the technique is flexible; the adaptation to various oil products is good. The hydrogenation catalyst can carry out deep desulfurization on the oil products and has small effects on the octane number of the oil products. The invention discloses a preparation method for the catalyst.

Description

technical field [0001] The invention relates to an alumina carrier catalyst and a preparation method thereof, and also relates to a gasoline hydrogenation refining method. Background technique [0002] With the rapid development of my country's economy and the continuous deepening of sustainable development strategies, the technical specifications of my country's refined oil products for vehicles are constantly being upgraded. The standard greater than 35% (v / v) has fallen behind; the more stringent National III standard requires that the sulfur content in finished gasoline is not greater than 0.015%, and the National IV standard requires that the sulfur content in finished gasoline is not greater than 0.005%. [0003] The finished gasoline for vehicles in my country mainly comes from catalytic cracking units. According to reports, more than 90% of the sulfur content in finished gasoline comes from catalytic gasoline, and more than 70% of the olefins come from catalytic gasol...

AI Technical Summary

Problems solved by technology

[0012] The above technologies have their own advantages, but the disadvantage is that the loss of anti-knock index is relatively large during deep desulfurization, because the main raw material of the catalyst carrier is Al 2 o 3 , Al 2 o 3 The characteristics of the carrier itself lead to the saturation of olefins. In the process of catalyst design, the adjustment measures for the number of acid centers and acid strength of the carrier are not in place, which makes the catalyst selectivity not strong, resulting in the loss of antiknock index

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