Novel organic sulfur hydrogenation catalyst carrier and preparation method thereof

Abstract

The invention relates to a novel organic sulfur hydrogenation catalyst carrier. A preparation method of the carrier comprises steps that: a neutralization material, pseudoboehmite (gamma-alumina), an adhesive, a hole expansion agent and a metal additive are mixed; the mixture is subject to knead-molding, drying, and roasting, such that a finished product is obtained. The method is characterized in that the neutralization material is prepared through steps that: pseudoboehmite is soaked by using an alkaline solution, and is neutralized by using an acid solution; and the pseudoboehmite is subject to washing and press-filtrating, such that the neutralization material is obtained. Therefore, impurity content in the pores is greatly reduced, such that the loading of active components is promoted. A catalyst prepared by using the carrier is suitable to be used in hydrogenation catalyzing of organic sulfur in natural gas, coke oven gas, exhaust gas, and the like. Organic sulfur is converted into inorganic sulfides; and the sulfides are removed with the cooperation of an inorganic sulfur desulfurizing agent.

Description

technical field [0001] The invention relates to a catalyst carrier for organic sulfur hydrogenation, belonging to the field of desulfurizers. Background technique [0002] Gases such as coke oven gas, natural gas, petroleum-associated gas, and refinery waste gas contain a large amount of organic sulfur compounds, including carbonyl sulfide, sulfide, mercaptan, and thiophene. Harmful, and when these gases continue to be used in industrial production, organosulfur compounds will deactivate the catalyst used in industrial reactions, affect the catalytic performance of the catalyst, resulting in a decline in industrial yield, for example, when using coke oven gas to produce methanol , the general methanol synthesis catalyst requires the total sulfur content of coke oven gas to be less than 0.1ppm, and even more advanced methanol synthesis catalysts require the total sulfur content of coke oven gas to be less than 0.05ppm, otherwise the catalyst will Furnace gas will be deactiva...

AI Technical Summary

Problems solved by technology

In the prior art, the Chinese patent document CN101797508A discloses a coke oven gas organic sulfur hydrogenation catalyst, which uses γ-Al2O3 as a carrier, and is impregnated The organic sulfur hydrogenation catalyst was prepared by loading the oxides of the active components iron, molybdenum and cobalt on the catalyst support; this technology uses γ-Al2O3 As a carrier, due to the large pore volume and loose structure of γ-Al2O3, γ-Al2O3 The strength and compression resistance of the carrier are low. Under actual working conditions, the catalyst is easily crushed due to pressure, which affects the service life of the catalyst. In order to maintain normal production, the catalyst needs to be replaced frequently, which increases the cost of production

[0004] In order to enhance the strength and compression resistance of the catalyst, Chinese patent CN101450327B discloses an alumina carrier that can be used for organosulfur hydrogenation catalysts. The carrier is passed through alumina ( or pseudo-boehmite) mixed with binders and pore-forming agents, and obtained through granulation, drying, tablet molding, and roasting, so that the combination of alumina (or pseudo-boehmite) and additives can improve The strength and compression resistance of the carrier are improved, and the strength and compression resistance of the hydrodesulfurization catalyst are correspondingly improved; However, the surface of alumina (or pseudoboehmite) has a large amount of impurities such as Cl ions and SO4 ions adsorbed on the surface of alumina (or pseudoboehmite), which occupy the The adsorption sites on the surface of pseudo-boehmite) reduce the adsorption amount of active components, thereby reducing the amount of active components loaded on the carrier, which reduces the catalytic performance of the catalyst, reduces the efficiency of catalytic hydrodesulfurization reaction, and reduces the production efficiency