Gasoline desulfurization catalyst and preparation method thereof and gasoline desulfurization method

Abstract

The invention provides a gasoline desulfurization catalyst, a preparation method of the gasoline desulfurization catalyst, and a gasoline desulfurization method. On the basis of the total weight of the gasoline desulfurization catalyst, the gasoline desulfurization catalyst comprises the following components: 10 to 30% of nickel oxide, 30 to 60% of zinc oxide, 0.1 to 5% of potassium oxide, 5 to 20% of SAPO-11 (Silicoaluminophosphate) molecular sieve and/or ZSM (Zeolite Socony Mobil) molecular sieve, and the balance of alumina. The preparation method of the gasoline desulfurization catalyst comprises the following steps of: mixing raw materials; forming; drying; and roasting for 0.5 to 4 hours at 400 to 600 DEG C, thus obtaining the gasoline desulfurization catalyst. The gasoline desulfurization method comprises the following step of: contacting sulfur-containing gasoline with the gasoline desulfurization catalyst at a critical hydrogen condition in which the weight space velocity is 2 to 8h<-1>, the temperature ranges from 350 to 500 DEG C, the pressure is 1 to 3MPa, and the molar ratio of hydrogen/sulfur-containing gasoline is 0.1 to 0.8, thus obtaining the gasoline with ultra-low sulfur content. The gasoline desulfurization catalyst provided by the invention is a catalyst with two functions, namely, proper hydrogenation activity and adsorption capacity.

Description

technical field [0001] The present invention relates to a gasoline desulfurization catalyst and its preparation method and gasoline desulfurization method, in particular to a gasoline deep desulfurization catalyst with dual functions of hydrogenation activity and adsorption capacity and its preparation method, and the method of using the gasoline desulfurization catalyst for gasoline desulfurization The method belongs to the technical field of gasoline desulfurization. Background technique [0002] In recent years, many countries in the world have made strict regulations on the sulfur content of motor gasoline through regulations, requiring the production and use of environmentally friendly ultra-low sulfur gasoline. Since 2008, Beijing has implemented the standard that the sulfur content of commercial gasoline is less than 50 μg / g. On January 1, 2010, my country has implemented the National III standard for gasoline quality, requiring the sulfur content of commercial gasoli...

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Problems solved by technology

CN101433821A, CN101434854A, CN101434862A, CN1261218C, CN1583972A, CN1583973A all disclose the method that contains zeolite desulfurizer cracking desulfurization under non-hydrogen condition, but the desulfurization rate of these methods can only generally reach 50-80% by weight, can not be used for producing low Oil products with high sulfur content, and the loss of gasoline liquid is relatively large

CN1407064A discloses a method for desulfurization using a nickel-based amorphous alloy adsorbent in a slurry bed. The desulfurization rate of this method can reach 60% by weight, but this type of adsorbent has poor regenerability and cannot be used for continuous regeneration

CN1406914A discloses the use of nickel-based amorphous alloy adsorbent to remove C in the slurry bed 6 -C 11 The method of sulfide in aromatic hydrocarbons can reduce the sulfur content to below 0.05μg/g, and its disadvantage is that the adsorbent has poor regenerability and cannot be used continuously.

CN1110931A, CN1151333A disclose the adsorbent that zinc oxide, silicon oxide, colloidal oxide and

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