Hydrocatalyst for preparing fuel by hydrodealkylation of coal-tar pitch and preparation thereof

Abstract

The invention relates to hydrosenation catalyst for producing oil by converting heavy coal tar pitch into light coal tar pitch, which is characterized in that: 100 portions of macroporous alumina is immersed into 100 portions of solution which consists of 3.5 to 20.5 weight percent of nickel nitrate and 3.0 to 25.0 weight percent of molybdenum nitrate for 2 hours at a temperature of between 50 and 60 DEG C; the mixture stands and supernatant is poured out, and then the mixture is dried for 4 hours at a temperature of 120 DEG C, activated for 5 hours at a temperature of 480 DEG C, and then immersed into cupric nitrate solution, cobalt nitrate solution, silver nitrate solution, ferric nitrate solution or bismuth nitrate solution with a concentration between 1.1 and 12.0 weight percent; and the catalyst is prepared through immersion, drying and activation which are the same as the above. The content of the nickel oxide and the molybdenum oxide in the catalyst is respectively 1.2 to 11.2 weight percent and 1.1 to 15.4 weight percent of the weight of carrier, and the content of cupric oxide, cobalt oxide, silver oxide, ferric oxide or bismuth oxide is 1.1 to 7.8 weight percent of the weight of the carrier. The hydrogenation catalyst has good adaptability to various coal tar pitch raw materials, high hydrogenation degree, strong controllability, low operating cost, and high yield of the oil produced by converting the heavy coal tar pitch into the light coal tar pitch; and the overall oil yield of fuel can reach over 75 percent.

Description

technical field [0001] The invention relates to a coal tar pitch lightening oil production catalyst and a preparation method thereof, in particular to a macroporous nickel-molybdenum-based hydrogenation catalyst for coal tar pitch hydrogenation and cracking upgrading oil production. Background technique [0002] In the processing and utilization of coal tar, coal tar is usually firstly fractionated into light and heavy fractions, that is, it is divided into several narrow fractions such as light oil, phenol oil, naphthalene oil, washing oil, anthracene oil and so on by distillation. tar pitch. Then, after hydrofining or upgrading, different narrow fractions are separated and extracted to produce chemical products such as phenol, naphthalene, anthracene, and the remaining part of the processing and extraction is often blended into fuel oil for use. It can be seen that the processing of coal tar in the past was mainly concentrated in the production of chemical products. Howe...

AI Technical Summary

Problems solved by technology

The catalyst of the present invention solves the problem that the catalyst existing in the hydrogenation of coal tar pitch is not enough to hydrogenate coal tar pitch, and cannot carry out deep hydrogenation and molecular cracking to convert coal tar pitch into oil products