Composite type coal tar hydrogenation catalyst and preparation method thereof

Abstract

The invention relates to a coal tar hydrogenation catalyst and a preparation method thereof. The catalyst consists of an active ingredient and a carrier. The active ingredient is one or more of molybdenum, nickel, cobalt or tungsten water-soluble salt. The carrier is coal gangue. The content of the active ingredient is 60-90 wt%, and the content of the carrier is 10-40 wt%. The catalysis to forming load of the active ingredient on the coal gangue carrier is effectively achieved through a negative pressure freeze-drying forming process, the coal tar hydrogenation catalyst is used in a coal tar suspended bed hydrocracking technological process and has good hydrogenation activity, the production rate of light oil reaches to more than 96%, the coal gangue is cheap and easily obtained and can be recycled and used repeatedly, and the preparing and using cost of the catalyst can be reduced remarkably.

Description

technical field [0001] The invention relates to a hydrogenation catalyst and a preparation method thereof, in particular to a hydrogenation catalyst for refining coal tar and a preparation method thereof, belonging to the technical field of chemical industry. Background technique [0002] Coal tar, also known as coal paste, is an important by-product of coal pyrolysis and carbonization process. It has tens of thousands of components, mainly containing aromatics such as benzene, toluene, xylene, naphthalene, anthracene, and aromatic oxygenates Phenolic compounds such as phenol), nitrogen-containing, sulfur-containing heterocyclic compounds and many other organic compounds. [0003] In the processing and utilization of coal tar, coal tar is usually fractionated into light and heavy fractions first, that is, it is divided into several narrow fractions such as light oil, phenol oil, naphthalene oil, wash oil, anthracene oil and tar by distillation. asphalt. Then, the raw mater...

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Problems solved by technology

[0007] The technical problem to be solved by this invention is that the coal tar catalyst in the prior art sprays the water-soluble salt of molybdenum, nickel, cobalt, and tungsten metal onto the surface of iron oxide ore or iron sulfide ore, so that the salts of the above-mentioned metals are easily Cover the active centers on the surface of iron oxide ore or iron sulfide ore, so that the catalytic activity of the above-mentioned iron oxide ore or iron sulfide ore cannot be exerted, and the cost of the above-mentioned ore is relatively high, thereby increasing the preparation cost of the catalyst as a whole , and then provide a low-cost, high catalytic activity coal tar hydrogenation catalyst

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