Hydrogenation cracking method to produce more raw material for making ethylene

A technology of hydrocracking and ethylene production, which is applied in the cracking field of hydrocarbon oil, which can solve the problem of low yield of tail oil and achieve the effect of low BMCI value

Active Publication Date: 2007-01-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because the invention uses a hydrocracking catalyst suitable for producing more middle distillate oil, its technical feature is to increase the production of low-point diesel oil, so the tail oil yield is low

Method used

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  • Hydrogenation cracking method to produce more raw material for making ethylene

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preparation example Construction

[0018] The preparation method of the hydrorefining catalyst is as follows: after uniformly mixing aluminum oxide, silicon oxide and a salt solution containing fluorine and / or phosphorus in required proportions, extruding, drying and roasting to make a carrier. Mix the salt solution of metal tungsten, molybdenum and nickel with a specific complexing solution according to a certain ratio, add the carrier into the mixed solution, soak for a certain period of time, then filter off the remaining solution, and obtain the finished catalyst after drying and activation .

[0019] The denitrification activity of the preferred hydrorefining catalyst is about 30% higher than that of the current advanced hydrodenitrification catalyst, or the reaction temperature can be lowered by 8-12°C when the same denitrification rate is achieved.

[0020] In order to ensure the long-term operation of the industrial device, a protective agent is loaded on the top of the hydrorefining catalyst. The prote...

Embodiment 1

[0040] Using VGO with nitrogen content as high as 2300μg / g as raw material A, a comparative test of denitrification activity of hydrofining catalyst was carried out. The denitrification effects of the refined catalyst D with high denitrification activity of the present invention and the comparative hydrotreating catalyst N are listed in Table 2.

[0041] As can be seen from Table 2: under the same reaction conditions, compared with the comparison hydrofinishing catalyst N, the refined oil nitrogen content of the hydrofinishing catalyst D of the present invention is significantly reduced, and the other reaction conditions are the same, and the reaction temperature is 360 ° C The relative hydrodenitrogenation activity of Refined Catalyst D is 26% and 27% higher than that of Comparative Hydrofinished Catalyst N at 380°C and 380°C respectively.

Embodiment 2

[0043] A VGO is used as the raw material B, the raw material oil and hydrogen enter the hydrotreating reactor, and react under the action of the hydrofining catalyst, and the reaction effluent enters the hydrocracking reactor without separation, and acts on the hydrocracking catalyst E The reaction is carried out under the following conditions, and the generated reaction effluent is cooled, separated and fractionated to obtain naphtha, diesel oil and tail oil. The test results are shown in Table 3. It can be seen from the data in Table 3 that when the preferred hydrocracking catalyst E of the present invention is used, the BMCI value of the tail oil is as low as 11.0.

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Abstract

The present invention relates to a hydrocracking method for producing high-grade raw material for making ethylene. It is characterized by that it adopts single-stage series-connected once-through process, the heated raw material and hydrogen gas are fed into hydrogenation treatment reactor, in the presence of optimized hydrofining catalyst they are reacted, the reaction effluent is not undergone the process of separation and is directly fed into hydrocracking reactor, in the presence of optimized hydrocracking catalyst they are reacted, the reaction effluent can be undergone the process of oil-gas separation so as to obtain hydrogen-rich gas and liquid, the hydrogen-rich gas can be circularly used after it is compressed, and the liquid can be fractionated so as to obtain naphtha fraction, diesel oil fraction and tail oil fraction.

Description

technical field [0001] The invention belongs to a kind of cracking of hydrocarbon oil for obtaining low-boiling fractions in the presence of hydrogen, more specifically, it is a hydrocracking method for producing high-quality ethylene raw materials. Background technique [0002] Ethylene is the basic raw material of petrochemical industry. With the development of national economy, my country's ethylene production capacity has increased rapidly, but it still cannot meet the demand for ethylene in the domestic market, and about half of it has to rely on imports. Steam cracking of hydrocarbons is the main means of producing ethylene. The sources of raw materials for steam cracking to produce ethylene are extensive. Light fraction raw materials include light hydrocarbons and naphtha, and heavy fraction raw materials include straight-run gas oil (AGO) and hydrocracking tail oil, etc., among which Light hydrocarbons and hydrocracking tail oil are ethyle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G47/12C07C11/04C07C4/06
Inventor 胡志海董建伟蒋东红熊震霖毛以朝聂红石亚华李大东
Owner CHINA PETROLEUM & CHEM CORP
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