Combined processing method of heavy oil raw material

A technology of combined processing and raw materials, which is applied in the field of combined processing of heavy oil raw materials, can solve the problems of low yield of liquid products, achieve the effects of reducing the generation of moderate thermal conversion coke, optimizing oil agent contact, and improving efficiency

Active Publication Date: 2012-08-22
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for processing heavy oil raw materials that increases the yield of liquid products on the basis of the prior art. The technical problem to be solved is the low yield of liquid products when processing inferior heavy oil with high carbon residue

Method used

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Effect test

Embodiment 1

[0026] In this embodiment, raw material oil A is used as raw material, and its properties are shown in Table 1. The free radical terminator used was 2,6-di-tert-butyl-p-cresol, based on raw material oil A, and the addition amount was 300 μg / g. Feedstock oil A and 2,6-di-tert-butyl-p-cresol are added to the thermal conversion reactor to carry out the moderate thermal conversion reaction. The operating conditions are: the reaction temperature is 430°C, the residence time is 20min, and the reaction pressure (gauge pressure ) is 0.2MPa. After the raw material oil A undergoes mild thermal conversion, the distribution of the reaction products is shown in Table 2, and the properties of the raw material oil after the reaction are shown in Table 3.

[0027] It can be seen from Table 3 that the properties of the product after the mild thermal conversion of raw material oil A are greatly improved, and the kinematic viscosity at 100°C is changed from 926mm 2 / s reduced to 386mm 2 / s, t...

Embodiment 2

[0033] The raw material used in this embodiment is raw oil B, and its properties are shown in Table 1. The free radical terminator used is zinc dialkyldithiophosphate, based on the raw material oil B, and its addition amount is 300 μg / g. Feedstock oil B and zinc dialkyldithiophosphate are added to a thermal conversion reactor to undergo a mild thermal conversion reaction. The operating conditions are: reaction temperature 430°C, residence time 30min, reaction pressure (gauge pressure) 0.2MPa . The stream after the heat conversion is sent in the fluidized bed contact cracking reactor, contacts and reacts with the semi-synthetic silicon-alumina contact agent produced by spray drying technology, and the microreaction activity of the semi-synthetic silicon-alumina contact agent is 16.7 (according to the standard Measured by ASTM D3907-87), the particle size range is 45-150 μm, and the average particle size is 94 μm. Its operating conditions: the reaction temperature is 500°C, th...

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Abstract

A combined processing method of heavy oil raw materials. According to the invention, a proper amount of radical terminators are added into heavy oil raw materials, and the mixture is introduced into a thermal conversion reactor for mild thermal conversion; the material flow after thermal conversion enters a contact cracking reactor for a contact cracking reaction to obtain a oil gas product. After mild thermal conversion, the heavy raw oil with the added radical terminator has a decreased molecule size and reduced viscosity, and thus when the heavy oil enters the contact cracking reactor, better contact with contact agents is realized, and product distribution is improved. In addition, the addition of the radical terminator into the heavy oil raw materials increases the yield of liquid products of the mild thermal conversion, and reduces the coke yield.

Description

technical field [0001] The present invention relates to a combined process for non-catalytic thermal cracking and catalytic thermal cracking of hydrocarbon oils in the absence of hydrogen. Background technique [0002] With the rapid development of the world economy, the demand for light petroleum products has increased rapidly, while crude oil has become increasingly heavy and inferior. At the same time, environmental protection requirements have become increasingly stringent, posing new challenges to the petroleum processing industry. [0003] Processing heavy oil is the key to increasing the yield of light crude oil. In the heavy oil processing technology, there are two schemes of hydrogenation and decarbonization. Whether it is hydrogenation technology or decarbonization technology, the purpose is to change the proportion of carbon and hydrogen in heavy oil, so that the hydrocarbons are recombined, and the hydrogen content is lower. Heavy oil is processed into light pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G55/06
Inventor 于凯张书红李延军张美菊王子军
Owner CHINA PETROLEUM & CHEM CORP
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