Process for preparing high temperature heat transfer oil base oil by using C10 heavy aromatic residual oil

Abstract

The invention discloses process for preparing high temperature heat transfer oil base oil by using C10 heavy aromatic residual oil. The method comprises the following steps: leading C10 heavy aromatic raw material into a first rectification column, controlling the process condition of the first rectification column, extracting first aromatics solvent from the top of the first rectification column, extracting durene enrichment liquid from lateral lines, leading distillate from the bottom of the first rectification column into a second rectification column for continuing rectification, controlling the process condition of the second rectification column, extracting second aromatics solvent from the top of the second rectification column, extracting third aromatics solvent from lateral lines, leading the distillate from the bottom of the second rectification column into the third rectification column for continuing rectification, controlling the process condition of the third rectification column, extracting fourth aromatics solvent from the top of the third rectification column, and extracting high temperature heat transfer oil base oil from lateral lines, wherein the distillate from the bottom of the third rectification column is a small quantity of Kettle residual oil. Through the method provided by the invention, not only is the residual oil amount reduced from 25-30 percent of total quantity of the raw material to about 5 percent of total quantity of the raw material, more importantly, 80 percent of residual oil with low added value is processed to be residual oil with high added value, the utilization ratio of the C10 heavy aromatic residual oil is increased, enterprise revenue is increased, and novel technical support for comprehensive utilization of the C10 heavy aromatic is brought.

Description

technical field [0001] The present invention relates to the production field of heat conduction oil base oil, particularly relate to a kind of by C 10 Process for preparing high temperature heat transfer oil base oil from heavy aromatics residue. Background technique [0002] Heat transfer oil (Hot Oils) is a heat transfer medium, its standard name is organic heat carrier (GB 23971-2009), including heat transfer fluid (Heat Transfer Fluids), organic heat transfer medium (Organic Heat Transfer Carriers) , Heating Media and other organic media used for indirect heat transfer purposes. [0003] According to the composition and manufacturing process, heat transfer oil can be divided into synthetic heat transfer oil and mineral heat transfer oil. Synthetic heat transfer oil is usually composed of several isomers or mixtures with similar chemical properties. It is organically synthesized from chemical or petroleum as raw materials. Its main components are biphenyl, naphthalene, ...

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Problems solved by technology

[0006] Chinese patent 101885663A discloses a method for lightening and transalkylation of heavy aromatics, which solves the problem of low activity of catalysts for lightening heavy aromatics and transalkylation in the past; Chinese patent 1311059C invented a method for converting heavy aromatics A method for light aromatic products, converting heavy aromatics into reaction products containing xylene; Chinese patent 202337739U designed a set of C 10 The recovery process system of heavy aromatics realizes the effective separation of various high value-added substances after heavy aromatics are dealkylated by catalytic hydrogenation

[0007] However, at present, most processes still leave a lot of residual oil after comprehensive processing. Although the amount varies, most of them are about 25-30% of the total raw material. The residual oil is mainly mono-aromatic oil containing multiple methyl groups Cyclic or polyaromatic heavy aromatics, with high boiling point and stable chemical properties, are the main components of high-temperature heat transfer oil. At present, this part of residual oil is mainly used to produce rough products, such as plasticizers, or to produce heavy oil after treatment. High-quality fuel oil is not only cheap, it is not conducive to improving the efficiency of enterprises, but also causes a certain waste of resources

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