Viscosity breaking method

A technology for visbreaking and vacuum residual oil, which is applied in cracking, non-catalytic thermal cracking, petroleum industry, etc., can solve problems such as large investment and operating costs, achieve good stability, high density, and improve visbreaking depth. Effect
CN101463267AActive Publication Date: 2009-06-24CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2009-06-24

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Abstract

The invention discloses a visbreaking method, comprising the steps of: under the condition of reduced pressure distillation, distilling the visbreaking raw materials under the reduced pressure to acquire a reduced distillate oil and vacuum residue having cutting temperature not less than 540 DEG C; subjecting visbreaking the reduced distillate oil under the condition of the visbreaking, mixing the product of the reduced distillate oil experiencing the visbreaking with the vacuum residue to acquire a mixed oil; visbreaking the mixed oil at the bottom of a visbreaking fractionating tower and acquiring gas, naphtha and visbreaking residue by means of fractionation; and causing the temperature of the reduced distillate oil for the visbreaking to be higher than that of the mixed oil for the visbreaking. By applying the visbreaking method provided by the invention, visbreaking conversion rate can be enhanced; meanwhile the visbreaking residue can be reduced in viscosity and is excellent in stability.
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Description

technical field

[0001] The invention relates to a visbreaking method. Background technique

[0002] Visbreaking is a mild thermal conversion process of heavy oil. Its main purpose is to reduce the viscosity and pour point of heavy oil, so that it can be mixed with less or no light oil to obtain qualified fuel oil, or to provide raw materials for further lightening of heavy oil. Visbreaking is still one of the important means of heavy oil processing due to its simple process, low investment and good benefits. The raw material for visbreaking is mainly vacuum residual oil, and topped crude oil, atmospheric residual oil and heavy crude oil can also be used as raw materials. The visbreaking products are mainly visbreaking gas, naphtha and residual oil, and the visbreaking residual oil can be further distilled under reduced pressure to obtain visbreaking vacuum distillate oil and visbreaking vacuum residual oil.

[0003] The visbreaking reaction temperature is usually between 3...

Claims

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