Method for preparing carbon-contained catalyst carrier

Abstract

The invention discloses a method for preparing a carbon-contained catalyst carrier, which comprises the following steps of: preparing a carbon-free porous inorganic refractory oxide carrier; soaking a precursor of carbon on the carbon-free inorganic refractory oxide carrier; introducing a metal auxiliary agent when preparing the carbon-free carrier and / or soaking the precursor of the carbon; then carrying out heat treatment on the porous inorganic refractory oxide carrier loaded with the precursor of the carbon and the metal auxiliary agent; decomposing the precursor of the carbon into carbon to obtain the carbon-contained catalyst carrier. In the preparation process of the catalyst carrier, by the promoting function of a few of metal auxiliary agents, the precursor of the carbon is decomposed, and the strict processing condition is prevented; the surface of the catalyst carrier is covered, the surface property of the catalyst carrier is adjusted, and the aim of improving the use performance of catalyst is achieved. Compared with a method for adding the precursor of the carbon in the molding process of the carrier, the method has the advantages of carrier strength improvement and utilization ratio improvement of carbon in the carrier, and greatly improves the hydrogenation processing activity of heavy mass distillate oil.

Description

technical field [0001] The invention relates to a preparation method of a carbon-containing catalyst support, in particular to a preparation method of a carbon-containing hydrogenation catalyst support. Background technique [0002] Most traditional hydrotreating catalysts use Al 2 o 3 As a carrier, but active Al 2 o 3 (such as γ-Al 2 o 3 ) has more Lewis acid centers, which can easily lead to coking of the catalyst, and γ-Al 2 o 3 There is a strong interaction between the carrier and the metal component, which makes it difficult for the metal component to transform into a highly active active phase. [0003] It is believed that the type II active phase is fully vulcanized and is stacked (stacked) MoS 2 Structure, Co-Mo-S active phase with high sulfur coordination, usually stacked (stacked) together by larger sheets, not connected to the carrier, each active center of type II active phase has high potential activity, hydrogenation of thiophene The activity of desulf...

AI Technical Summary

Problems solved by technology

However, the existing carbon coating method has a complicated preparation process and high cost, making it difficult to be industrialized on a large scale.