Method for preparing and using cracking catalyst for oil production by lightening coal-tar pitch

A technology of coal tar pitch and cracking catalyst, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc. It can solve the problems of easy coking and deactivation of catalysts, low oil yield, etc., and achieve considerable economic benefits , good oil quality and low operating costs

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 problems of low oil yield and easy coking and deactivation of the catalyst existing in the hydrogenation of coal tar pitch for the cracking and lightening of coal tar pitch

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The preparation of the third-stage cracking catalyst of the fixed-bed reactor for direct production of various types of fuel oil by lightening coal tar pitch: immerse 100 parts by weight of commercial USY zeolite with a silicon-aluminum ratio of 3 into 100 parts by weight of an aqueous solution of 2.8 wt% metal ferric nitrate , impregnated at 80°C for 2 hours, left to stand after impregnated and poured out the supernatant, dried at 120°C for 4 hours, and then activated at 500°C for 5 hours to obtain the cracking catalyst of the present invention. The measured metal iron oxide content is 1.2wt% of the modified zeolite weight,

[0021] The cracking catalyst obtained by the above method is used in the third-stage coal tar pitch lightening process to produce fuel oil: coal tar is used as a solvent and mixed with coal tar pitch in advance, and heated to 108 ° C and stirred to dissolve, and then filtered to remove insoluble solids After the impurity, the raw material of the r...

Embodiment 2

[0023] The preparation of the third-stage cracking catalyst of the fixed-bed reactor for direct production of various fuel oils from the lightening of coal tar pitch: immerse 100 parts of commercial ZSM-5 zeolite with a silicon-aluminum ratio of 50 into 100 parts of 9.5wt% aqueous solution of metal lanthanum nitrate, at 80 ℃ for 2 hours, after immersion, let stand and pour out the supernatant, dry at 120 ℃ for 4 hours, and then activate at 500 ℃ for 5 hours to obtain the cracking catalyst of the present invention. After determination, the metal lanthanum oxide content is 5.3wt% of the modified zeolite weight,

[0024] The cracking catalyst obtained by the above method is used in the third-stage coal tar pitch lightening process to produce fuel oil: coal tar is used as a solvent and mixed with coal tar pitch in advance, heated to 120°C, stirred and dissolved, and then filtered to remove insoluble solid impurities After being heated by heat exchange, it enters the first fixed-be...

Embodiment 3

[0026] The preparation of the third stage cracking catalyst of fixed bed reactor: with 100 parts by weight, the commodity MCM-22 zeolite that silicon-alumina ratio is 32 is immersed in 100 parts by weight concentration and is 20.8wt% metal molybdenum nitrate aqueous solution, soaks 2 hours in 80 ℃, After immersion, let stand and pour out the supernatant, dry at 120°C for 4 hours, and then activate at 500°C for 5 hours to obtain the cracking catalyst of the present invention. It is determined that the content of the metal molybdenum oxide is 11.1wt% of the weight of the modified zeolite.

[0027] The cracking catalyst obtained by the above method is used in the third-stage coal tar pitch lightening process to produce fuel oil: coal tar is used as a solvent and mixed with coal tar pitch in advance, heated to 143°C, stirred and dissolved, and then filtered to remove insoluble solid impurities After being heated by heat exchange, it enters the first fixed-bed reactor. At a tempera...

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PUM

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Abstract

Preparation and application of a coaltar pitch oil preparation cracking catalyst, relate to a cracking catalyst for coaltar pitch oil preparation, which is characterized by the following: immerging 100 portion zeolite into 100 portion metal nitrate aqueous solution with the concentration of 2.8 wt%-24.2 wt% for 2 hours at the temperature of 80 DEG C; standing after dipping, and then obtaining supernatant fluid; drying the supernatant fluid for 4 hours at 120 DEG C, and then activating for 5 hours at 500 DEG C. to get the cracking catalyst which metal oxide content is 1.2 wt%-20.0 wt% of the weight of the zeolite. While in use, the catalyst is filled into a third stage fixed-bed reactor for coaltar pitch oil preparation to ensure the pitch which has already been hydrogenation modified and refined in a second stage fixed-bed reactor to perform catalytic cracking reaction, under the conditions of 400-450 DEG C, 1.0-5.0 bar, hydrogen-oil ratio of 900 / 1-1500 / 1 and catalytic reaction space-velocity WHSV of 0.5-2.0 h<-1>, wherein, the total oil yield of fuel can reach 75%. The invention with flexible operation condition and low operating cost is applicable for preparing oil by catalytic cracking various coaltar pitch.

Description

technical field [0001] The invention relates to a preparation and application method of a coal tar pitch lightening oil production catalyst, in particular to a preparation method and a use method of a cracking 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, hydrofining or upgrading from different narrow fractions is used to produce phenol, naphthalene, anthracene and other chemical products through separation and extraction, and the remaining part of the processing and extraction is often mixed into fuel oil for use. In the past, the processing of coal tar 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): B01J29/08B01J29/40B01J29/80C10G47/16B01J37/02
Inventor 朱志荣吴倩余兆祥
Owner TONGJI UNIV
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