Straight chain paraffin dehydrogenation catalyst carrier production process

Abstract

The invention relates to linear alkanes dehydrogenation catalyst carrier technics used in petrochemical industry. Its aperture distribution can be adjusted through producing macroporous alumina globule. Then add surface active agent in globule dropping process. Finally conduct hydrothermal treatment in supporter producing process. On base of self-research, globule dropping technics is designed by self to make product cost reduce remarkably. Using self produced macroporous alumina dropping globule, side pressure intensity of alumina globule can reach more than 20N per grain. Using self-researched macroporous gamma-Al2O3 with binocular construction, reaction performance of linear alkanes dehydrogenation catalyst can reach conversion>12-13 percent and selectivity>90 percent. Compared with international like products, its stability is better.

Description

[0001] Field: [0002] The invention belongs to a catalyst production process used in petrochemical plants, in particular to a straight-chain alkane dehydrogenation catalyst carrier production process. Background technique: [0003] Before the 1990s, dehydrogenation catalysts were monopolized by foreign companies, with an average annual price increase of more than 20%. In the early 1990s, domestic linear alkane dehydrogenation catalysts were put into the market, breaking the monopoly of foreign companies on this product, but the output was very small. At present, there are three alkylbenzene factories in China (Fushun Detergent Chemical Factory, Nanjing Alkylbenzene Factory, Nanjing Jintong Petrochemical Co., Ltd.), and the production capacity of alkylbenzene units has reached nearly 400,000 tons. The production capacity of benzene plant has reached 200,000 tons / year. The demand for linear alkane dehydrogenation catalyst is 70 tons / year. [0004] At present, there is only o...

AI Technical Summary

Problems solved by technology

[0004] At present, there is only one set of domestic linear alkane dehydrogenation catalyst carrier production equipment (Taiyuan Daily Chemical Institute), with a production capacity of 60 tons per year, and two catalyst production equipment (Nanjing Alkyl Benzene Plant and Fushun Petrochemical Company Petrochemical Plant No. 5 ), foreign dehydrogenation catalyst suppliers are mainly UOP, which only sells finished catalysts, not carriers, and the price of catalysts is high and the output is low

In addition, the strength of the existing carrier is low, ~10N / particle, which cannot meet the requirements of catalyst regeneration

[0005] The carrier produced by Taiyuan Daily Chemical is still insufficient, the particle size is uneven, the range is wide, the strength is low, and there is a lot of dust in the catalyst production process, resulting in a large loss of active component platinum

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