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

A technology of coal tar pitch and hydrogenation catalyst, which is applied in the direction of refining to remove heteroatoms, etc., can solve the problems of insufficient hydrogenation degree of coal tar pitch, and achieve considerable economic benefits, low operating costs, and mild conditions

Inactive Publication Date: 2008-11-12
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The preparation method of the macroporous nickel-molybdenum-based catalyst used in the second stage of the fixed-bed reactor used in the second stage of the fixed-bed reactor for direct production of various types of fuel oil by hydrocracking and lightening of coal tar pitch is as follows: First, measure 100 parts of the pore diameter range of 3nm-8nm, and the specific surface area is 300m 2 / g of commercially available macroporous alumina, then the macroporous alumina is immersed in 100 parts of mixed solutions that are composed of 3.5 wt% nickel nitrate and 50 parts of 3.0 wt% molybdenum nitrate solution. Immerse at 60°C for 2 hours, let stand after dipping and pour out the supernatant, dry at 120°C for 4 hours, then activate at 480°C for 5 hours, add 100 parts of the above activated alumina to the concentration of 2.5wt% copper nitrate solution, and finally use the same method and conditions to carry out the loading of the third metal element copper, that is, the alu...

Embodiment 2

[0022] The preparation method of the macroporous nickel-molybdenum-based catalyst used in the second stage of the fixed-bed reactor used in the second stage of the fixed-bed reactor for the direct production of various types of fuel oil by hydrocracking and lightening of coal tar pitch is as follows: first measure 100 parts of the pore diameter range of 4nm-9nm, and the specific surface area is 330m 2 / g commercial macroporous alumina, then add it to 100 parts by 50 parts concentration of 10.5wt% nickel nitrate and 50 parts concentration of 6.0wt% molybdenum nitrate solution, impregnate at 50°C for 2 hours, leave standstill after impregnation And pour out the supernatant, dry at 120°C for 4 hours, then activate at 480°C for 5 hours, add 100 parts of cobalt nitrate with a concentration of 8.5wt% to the above-mentioned activated alumina, and then carry out the third step in the same way and under the same conditions. The loading of a metal cobalt, that is, the alumina-supported m...

Embodiment 3

[0025] The preparation method of the macroporous nickel-molybdenum-based catalyst used in the second stage of the fixed-bed reactor used in the second stage of the fixed-bed reactor for the direct production of various types of fuel oil by hydrocracking and lightening of coal tar pitch is as follows: first measure 100 parts of the pore diameter range of 5nm-10nm, and the specific surface area is 360m 2 / g commercial macroporous alumina, then add it to 100 parts of a mixed solution consisting of 50 parts of 15.0wt% nickel nitrate and 50 parts of 10.0wt% molybdenum nitrate solution, and impregnate at 60°C for 2 hours. After standing still and pouring out the supernatant, dry at 120°C for 4 hours, then activate at 480°C for 5 hours, add 100 parts of silver nitrate solution with a concentration of 6.5wt% to the above alumina, and then use the same method and conditions Carry out the loading of the third metal element silver, that is, prepare the alumina-supported metal hydrogenati...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G45/08
Inventor 朱志荣余兆祥吴倩
Owner TONGJI UNIV
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