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Catalyst used for coal tar pitch hydrocracking lightening reaction

A coal tar pitch and hydrocracking technology, applied in physical/chemical process catalysts, hydrocarbon oil cracking, molecular sieve catalysts, etc., can solve the problems of low yield of light oil products, complicated processing operations, difficult control of cracked oil, etc. To achieve the effect of low raw material cost and manufacturing cost, high cracking efficiency, and improvement that cannot be effectively lightened

Inactive Publication Date: 2011-04-27
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, it can solve the problems of strict coal tar pitch pretreatment requirements and complicated treatment operations in the prior art; light weight, multi-condensed ring configuration is still maintained; secondary pollution is easy to occur; pyrolysis oil is difficult to control, and light oil products are collected The problem of low rate and unstable quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Dry a batch of 14-mesh alumina at 70-120°C for 5 hours. Weigh 10g of dried alumina and place it in a dry branch bottle. A separatory funnel is connected to the top of the branch bottle. The branch pipe of the branch bottle is connected to the vacuum pump, the sealing is checked, and the device is vacuumed. Measure 12ml of ammonium sulfide solution, place it in a separatory funnel, and seal the device again. Turn off the vacuum pump to maintain the vacuum in the branch bottle, slowly drop the ammonium sulfide solvent in the separatory funnel onto the alumina in the branch bottle, when the liquid in the separatory funnel is about to drop completely, turn the knob of the separatory funnel Adjust it to the maximum, so that liquid and air can quickly enter the branch bottle. Under the action of pressure difference, ammonium sulfide can be better loaded on the alumina carrier. Seal the branch bottle so that the solvent stays inside for 20 minutes, and pour out the excess in t...

Embodiment 2

[0029] Dry a batch of 14-mesh alumina-containing silica gel at 70-120 °C for 10 hours, weigh 10 g of the dried carrier and place it in a dry branch bottle, connect a separatory funnel and a vacuum pump, and check the tightness ,Vacuum. Measure 15ml of ammonium sulfide solution, place it in a separatory funnel, and seal the device again. According to the operation of Example 1, the loading of ammonium sulfide was completed, nitrogen gas was blown in, and the mixture was left to dry at 80-90° C. for 14 hours. Weigh 4.4g each of ferrous sulfate heptahydrate and nickel nitrate hexahydrate, dissolve in 12ml of weak acid solution, and do the second loading after completely dissolving. After being loaded, it was airtight and left to stand for 1 hour, poured out the excess liquid, and dried at 100° C. for 5 hours under the protection of nitrogen to obtain the coal tar pitch hydrocracking catalyst B.

Embodiment 3

[0031] Dry the 14-mesh alumina-containing silica gel at 120°C for 2 hours, weigh 10 g of the dried carrier and place it in a dry branch bottle, connect a separatory funnel and a vacuum pump, check the tightness, and evacuate. Weigh 2.5g of ammonium molybdate tetrahydrate, dissolve it in 10ml of distilled water, and after it is completely dissolved, vacuum load it on the carrier, pour out the excess liquid, let it dry at 90°C for 15 hours, and put it in a muffle furnace for roasting at 500°C After 1 hour, the coal tar pitch hydrocracking catalyst C was obtained.

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PUM

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Abstract

The invention relates to a catalyst used for coal tar pitch hydrocracking lightening reaction. The preparation method of the catalyst comprises the following steps: taking an inorganic porous material as a carrier; selecting at least one of alumina, silica gel containing alumina, MCM-41 (mobile crystalline material-41) and SBA-15 (santa barbara amorphous-15); loading one or two of metal elements Fe, Ni, Co and Mo of active components onto the carrier in the form of metallic oxide or metallic sulphide by adopting a vacuum immersion method, wherein the metallic oxide or metallic sulphide content of the active components is 1-20wt% of the catalyst; then drying for 1-14 hours under the conditions that nitrogen is used for protection, normal pressure is kept and the temperature is 70-120 DEG C; and then roasting at the temperature of 500 DEG C for 3 hours. The catalyst in the invention has the advantages of simple preparation process, high catalytic activity, less reaction coking and high cracked light oil yield, thus being especially applicable to hydrocracking lightening of heavy component and pitch in coal tar, and the catalyst in the invention can cause conversion per pass of coal bar pitch to reach more than 70%.

Description

technical field [0001] The invention relates to a catalyst for coal tar pitch hydrocracking and lightening reaction. Background technique [0002] my country produces about 6 million tons of coal tar resources every year. Coal tar pitch is the residue of coal tar distillation, accounting for about 60% of the total coal tar. Because coal tar pitch is a mixture with very complex composition and structure, the main component is aromatic hydrocarbons with up to seven condensed rings, high molecular weight, difficult to dissolve, high aromaticity, difficult to burn completely, and easy to cause environmental pollution. Although the utilization of asphalt has started well, it mainly stays in the production of low value-added products. The modified coal asphalt is widely used as artificial graphite electrodes for steelmaking and graphite anodes for aluminum smelting and other shaped carbon materials. Binders, and matrix precursors for carbon composites. In terms of high value-add...

Claims

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Application Information

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IPC IPC(8): B01J23/745B01J23/755B01J23/28B01J29/78C10G47/20C10G47/12
Inventor 李富娟朱志荣余兆祥
Owner TONGJI UNIV
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