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Work starting method for coal tar hydrotreatment technique

A technology for hydrotreating and coal tar, which is applied in tar processing, petroleum industry, refining hydrocarbon oil, etc., and can solve problems not involved in the start-up of devices

Active Publication Date: 2008-03-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

No device start-up technology is involved in this process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] This example is a method for starting the plant after hydrotreating the heavy fraction of coal tar at -1 , then the reaction temperature was raised to 230°C at 10°C / h, constant temperature vulcanization for 8h, and then the reaction temperature was raised to 360°C at 10°C / h, constant temperature vulcanization for 8 hours, and then the 300 Coked diesel oil at -350°C is pumped into the reactor with a space velocity of 1.2h -1 , the volume ratio of hydrogen to oil is 1000, run at a constant temperature for 200 hours, and finally adjust the temperature to the reaction temperature to feed coal tar raw materials. The device starts normally and runs smoothly.

Embodiment 2

[0018] This example is a method for starting up the device after hydrotreating the whole fraction of coal tar by using a fixed bed. The specific operation process is: after the reactor bed of the device is heated to 150°C, the aviation kerosene containing 1.5v% carbon disulfide is pumped to the reactor with a space velocity of 1.0h -1 , then raise the reaction temperature to 230°C at 10°C / h, vulcanize at constant temperature for 8 hours, then raise the reaction temperature to 360°C at 10°C / h, vulcanize at constant temperature for 8 hours, and then directly add polyoxyethylene ether containing 3wt% fatty alcohol The 350-500 ℃ catalytic back refining pump is sent into the reactor with a space velocity of 1.0h -1 , the volume ratio of hydrogen to oil is 1500, run at a constant temperature for 300 hours, and finally adjust the temperature to the reaction temperature to feed coal tar raw materials. The device starts normally and runs smoothly.

Embodiment 3

[0020] This example is a method for starting up the device after hydrotreating coal tar distillate oil at -1 , then raise the reaction temperature to 230°C at 10°C / h, vulcanize at constant temperature for 8 hours, then raise the reaction temperature to 360°C at 10°C / h, vulcanize at constant temperature for 8 hours, then adjust the temperature to the reaction temperature, and then The 350-400 ℃ coking wax oil pump of 4wt% alkylphenol polyoxyethylene ether is sent into the reactor, and the space velocity is 1.0h -1 , the volume ratio of hydrogen to oil is 1000, run at a constant temperature for 100 hours, and finally pump the coal tar raw material into the reactor device. The device starts normally and runs smoothly.

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PUM

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Abstract

The present invention discloses the start-up method of coal tar hydrogenating treatment process includes the first vulcanizing or activating the catalyst, the subsequent pumping fraction oil containing polar matter into the reaction system and final pumping coal tar material into the reactor to start operation. The method is favorable to the normal start-up and smooth operation of the coal tar hydrogenating treatment apparatus and can prolong the service life of the catalyst.

Description

technical field [0001] The invention relates to a start-up method of a coal tar treatment process, in particular to a start-up method of a coal tar heavy fraction or whole fraction hydrogenation treatment process. Background technique [0002] Coal tar is a by-product of coal coking, carbonization and gasification processes. Coal tar is different from natural petroleum, with complex composition, high content of aromatics, colloids and asphaltenes, and impurities such as sulfur, nitrogen, oxygen and metals, among which the oxygen content is relatively high, generally 2wt%-9wt%, and the oxygen-containing substances are mainly Oxygen-containing complex heterocyclic hydrocarbons or aromatic derivatives. At present, coal tar is mostly used as boiler fuel, which has poor economy and serious environmental pollution. With the shortage of crude oil supply and rising prices, as well as the increasingly stringent requirements of environmental protection regulations and the increasing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10C1/00C10G45/00
Inventor 贾丽杨涛葛海龙李鹤鸣贾永忠刘建锟
Owner CHINA PETROLEUM & CHEM CORP
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