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Medium and low temperature coal tar hydrorefining technology

A low-temperature coal tar and hydrotreating technology, applied in hydrotreating process, petroleum industry, refined hydrocarbon oil, etc., can solve the problems of cracking of aromatic hydrocarbons and affecting product income, etc.

Inactive Publication Date: 2016-12-14
锡山区绿春塑料制品厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process will crack a large amount of aromatics with high economic value, which will affect the product yield

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The catalyst was prepared by impregnation method, and the carrier was doped Co 2+ SAPO-5, Co 2+ The doping amount in SAPO-5 is controlled at 0.65% of the carrier mass. The active component molybdenum nitride MO 2 N, tungsten nitride W 2 N, molybdenum carbide Mo 2 The total content of C and tungsten carbide WC is 10% of the mass of the carrier, and their molar ratio is 1:0.4:0.3:0.8.

[0046] The catalyst is loaded into a fixed bed reactor, the reaction tube of the reactor is made of stainless steel with an inner diameter of 50mm, the catalyst bed is set to 3 layers, the temperature of the catalyst bed is measured by a UGU808 temperature control meter, and the raw material is medium and low temperature Coal tar was continuously transported by a double-plunger micropump manufactured by Beijing Satellite Manufacturing Plant. Hydrogen was supplied by a high-pressure gas cylinder and the flow rate was controlled by a Beijing Qixing Huachuang D07-11A / ZM gas mass flow mete...

Embodiment 2

[0051] The catalyst was prepared by impregnation method, and the carrier was doped Co 2+ SAPO-5, Co 2+ The doping amount in SAPO-5 is controlled at 0.7% of the carrier mass. The active component molybdenum nitride MO 2 N, tungsten nitride W 2 N, molybdenum carbide Mo 2 The total content of C and tungsten carbide WC is 10% of the mass of the carrier, and the molar ratio is 1:0.6:0.45):1.2.

[0052] All the other conditions are the same as in Example 1.

[0053] The final product was tested, the total sulfur content was reduced to 3ppm, and the loss rate of aromatics was less than 2%.

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Abstract

The invention discloses a medium and low temperature coal tar hydrorefining technology. According to the technology, a fixed bed reactor is adopted and filled with a hydrogen desulfurization and denitrification catalyst, and the catalyst comprises a carrier and an active component; the carrier is SAPO-5 obtained by doping heteroatoms Co2+ into a synthesis skeleton structure. The active component is a mixture of MO2N, W2N, Mo2C and WC. According to the reaction conditions of the fixed bed reactor, the reaction temperature is 300-420 DEG C, the hydrogen partial pressure is 13-15 MPa, the hydrogen to oil volume ratio is 800-1200, and the volume air speed is 0.3-0.8 h<-1>. The technology can lower the total sulfur content in medium and low temperature coal tar to 5 ppm or below, and arene cracking is lowered.

Description

technical field [0001] The invention relates to a medium-low temperature coal tar hydrodesulfurization refining process, in particular to a medium-low temperature coal tar hydrodesulfurization refining process using a specific catalyst. Background technique [0002] Coal tar is one of the products in the crude gas generated by pyrolysis of coal in the coking industry, and its output accounts for about 3% to 4% of the furnace coal. Its product is black viscous liquid under normal temperature and pressure. Coal tar is the main raw material of the coal chemical industry, with tens of thousands of components, mainly containing aromatics such as benzene, toluene, xylene, naphthalene, anthracene, and aromatic oxygen-containing compounds (such as phenolic compounds such as phenol), nitrogen, Sulfur-containing heterocyclic compounds and other organic substances can be divided into fractions with different boiling point ranges by fractional distillation. According to different coal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G45/12C10G67/14B01J29/85
CPCC10G45/12B01J29/85B01J2229/18C10G67/14C10G2300/202C10G2300/70
Inventor 朱忠良
Owner 锡山区绿春塑料制品厂