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Hydrocracking method for producing chemical materials to maximum with low cost

A technology of hydrocracking and chemical raw materials, which is applied in the field of hydrocarbon oil cracking, can solve the problems of limiting the effect of hydrocracking technology, and achieve the effect of low investment and operating costs and low hydrogen consumption

Active Publication Date: 2010-03-31
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0004] However, the existing hydrocracking technology is mostly used to produce high-quality vehicle (or aircraft) transportation fuel, and there are few related technologies for prolific chemical raw materials, thus limiting the hydrocracking technology to a certain extent The role in increasing the production of chemical raw materials

Method used

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  • Hydrocracking method for producing chemical materials to maximum with low cost

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Experimental program
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Effect test

Embodiment 1

[0046] Using high-sulfur and high-nitrogen heavy VGO as the raw material, the properties of the raw material are shown in Table 1. The raw material oil and hydrogen are mixed into the first reaction zone, and then contacted with the hydrofinishing catalyst and the hydrocracking catalyst in turn. After separation, the obtained hydrogen-rich gas I is compressed by a circulating hydrogen compressor and then returned to the first reaction zone, and the obtained liquid phase stream I enters a fractionation system to obtain liquefied gas, light naphtha fraction, heavy naphtha fraction, intermediate distillate and tail oil fraction; the obtained middle distillate is mixed with the hydrogen from the first-stage compression outlet of the new hydrogen compressor and enters the second reaction zone, where it is contacted with the hydrocracking catalyst to react, and the reaction product is separated from oil and gas, and the obtained rich The hydrogen gas II is returned to the inlet of th...

Embodiment 2

[0064] A hydrocracking test was carried out according to the catalyst and process flow provided by the present invention, using VGO that was heavier than that in Example 1 and had relatively poor properties as a raw material. The test results are listed in Table 7-Table 10.

[0065] As can be seen from the data in the table: the VGO raw material with poorer quality can be processed by the method provided by the present invention, and the middle distillate yield can be reduced under the conditions of one reverse inlet hydrogen partial pressure of 13.4MPa and three reverse inlet hydrogen partial pressures of 3.5MPa. Reduced to the lowest, it is 0; and the largest production is to obtain liquefied gas, light naphtha, heavy naphtha and tail oil products, and the total yield reaches 98.7% by weight.

[0066] Table 7 Example 2 Raw Oil Properties

[0067] project

Density (15℃ / 15℃), g / cm3

0.9323

Sulfur content, wt%

2.990

Nitrogen content...

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Abstract

The invention relates to a hydrocracking method for producing chemical materials to the maximum with low cost, comprising the following steps: mixing raw oil and hydrogen gas , entering a first reaction area, sequentially contacting with hydrofining catalyst and hydrocracking catalyst, reacting under the pressure of 6.0-16.0 MPa; carrying out oil-gas separation and fractionation on the reaction products thereof to obtain liquefied gas, light naphtha fractions, heavy naphtha fractions, middle fractions and tail oil fractions; mixing the middle fractions and the hydrogen gas and enteringa second reaction area, contacting with the hydrocracking catalyst under the pressure of 1.0-5.5 MPa to react; and carrying out oil-gas separation on the reaction products thereof and entering a fractionation system . By adopting the method, heavy raw materials such as vacuum gas oil, coking gas oil and the like are treated to obtain more than 98 weight percent chemical materials. In the invention, themiddle fractions are wholly converted into the chemical materials in the low pressure condition, and low hydrogen consumption, low investment cost and low operation cost are realized.

Description

technical field [0001] The invention belongs to a hydrocarbon oil cracking method for obtaining low-boiling fractions in the presence of hydrogen, more specifically, a hydrocracking method for producing chemical raw materials. Background technique [0002] For a long time, due to the low yield of crude oil and light oil in my country, insufficient sources of chemical raw materials have become an important factor restricting the growth of ethylene and aromatics production. In the future, the growth rate of demand for ethylene and aromatics in my country will be much higher than that of vehicle fuel and crude oil processing. Economic experts predict that my country's crude oil processing capacity will reach 300 million tons and 390 million tons in 2010 and 2020, respectively. If the current yield of chemical raw materials (mainly straight-run naphtha) accounts for about 10% of crude oil, domestic refineries will be able to provide 30 million tons and 39 million tons of chemical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G47/02
Inventor 董建伟胡志海蒋东红吴昊毛以朝龙湘云聂红
Owner CHINA PETROLEUM & CHEM CORP
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