Prepn process of paraffin hydrofining catalyst

Abstract

The present invention relates to one kind of catalyst used in petroleum refining equipment and is especially the preparation process of one kind of paraffin hydrofining catalyst. The preparation process of the paraffin hydrofining catalyst includes modification with alumina, compounding of active component solution, soaking and forming. The catalyst prepared through the process has lower content of active component, low cost, high strength, optimized alumina pore distribution and high stability.

Description

Technical field: [0001] The present invention relates to a kind of catalyst used in petroleum refinery unit, specifically, it is the preparation method of paraffin hydrorefining catalyst. Background technique: [0002] my country has abundant paraffin resources, accounting for nearly 1 / 3 of the global paraffin production, ranking first in the world. my country's paraffin production was mainly based on the clay method and the sulfuric acid-clay method in the early days. Good, high yield, flexible operation and other advantages can be developed rapidly. Judging from the current situation of domestic catalysts, the total amount of active metals is relatively high, the shape of catalysts is mostly spherical, and the mechanical strength is low (see Table 1 for details). The large pressure drop and rapid rise have become the bottleneck restricting the production capacity of the device to reach the standard. At present, the process of catalyst preparation is to neutralize the alum...

AI Technical Summary

Problems solved by technology

Judging from the current situation of domestic catalysts, the total amount of active metals is relatively high, the shape of catalysts is mostly spherical, and the mechanical strength is low (see Table 1 for details). The pressure drop is large and rises quickly, which becomes the bottleneck restricting the production capacity of the device to meet the standard

The current process of catalyst preparation is to neutralize the gel with aluminum salt solution and precipitant, separate the prepared wet gel through mother liquor, wash and filter, shape, dry and roast to make a carrier, and the carrier is carried out with the active metal solution. Co-impregnation, followed by drying and roasting to obtain the finished catalyst, the control of the pore structure is only controlled by neutralization and gelling, and the pore size distribution is not concentrated, resulting in low catalyst activity and poor thermal stability, which cannot reach the quality of product export Require

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