Preparation method of heavy alkylbenzene heat conduction oil

Abstract

The invention relates to a preparation method of heavy alkylbenzene heat conduction oil. A primary product obtained after primary hydrogenation or desulfurization treatment is carried out on a heavy alkylbenzene byproduct for producing linear alkylbenzene is taken as a raw material, and the method specifically comprises the following steps: S1, introducing the primary product into a reduced pressure distillation tower under the reduced pressure distillation conditions that the temperature is 300-330 DEG C and the pressure is 6.0-7.0 kPa; and S2, introducing the ideal components at the top of the reduced pressure distillation tower into a cooler for cooling to obtain an ideal product. The performance of the heavy alkylbenzene heat-conducting oil obtained under the reduced pressure distillation condition is superior to that of a product obtained at the normal pressure and the temperature of 430 DEG C, the heat transfer efficiency of the product is remarkably improved while the energy consumption is reduced, and the product performance of the heavy alkylbenzene heat-conducting oil is comprehensively improved.

Description

technical field [0001] The invention relates to the technical field of heavy alkylbenzene refining, in particular to a preparation method of heavy alkylbenzene heat transfer oil. Background technique [0002] Heavy alkylbenzene (HAB) is a by-product in the production of dodecylbenzene, accounting for about 10% of alkylbenzene. [0003] In addition to mono- and di-alkylbenzenes, heavy alkylbenzenes also contain diphenylalkanes, polyalkylbenzenes, polyphenylalkanes, dialkylindans and tetralins. [0004] Among many ingredients, the best ingredients for the thermal conductivity industry are mono- and di-alkylbenzenes, while diphenylalkanes, polyalkylbenzenes, polyphenylalkanes, and dialkylindenes are non-ideal components. In the process of industrial heat conduction, full and tetralin have low heat transfer efficiency and high energy consumption, and will continue to polymerize and coke under the condition of continuous use at high temperatures to form insoluble colloidal aspha...

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Problems solved by technology

[0004] Among many ingredients, the best ingredients for the thermal conductivity industry are mono- and di-alkylbenzenes, while diphenylalkanes, polyalkylbenzenes, polyphenylalkanes, and dialkylindenes are non-ideal components. In the process of industrial heat conduction, full and tetralin have low heat transfer efficiency and high energy consumption, and will continue to polymerize and coke under the condition of continuous use at high temperatures to form insoluble colloidal asphaltene, etc., which adhere to the surface of the heat exchanger and the inner wall of the equipment pipe, causing Decreased heat transfer efficiency, pipe blockage, equipment corrosion and perforation

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