A kind of preparation method of high temperature synthetic heat conduction oil

Abstract

The invention relates to a preparation method of high-temperature synthetic heat transfer oil, which comprises: putting naphthalene into an autoclave, adding 2.5%~3.8% catalyst, after gas replacement, raising the temperature to 150~300°C for stirring, feeding in hydrogen, and the pressure is 3.2~4.0Mpa, after the reaction, cool down, remove the catalyst, and rectify the separated tetralin; put the tetralin into the reaction kettle, add the solvent, then add 1%~5% acid catalyst, stir, and then drop Styrene, the molar ratio of styrene and tetrahydronaphthalene is 0.7~0.9:1, and the dropping temperature is 75~85℃. The water layer is separated by rectification to obtain finished products. The method provided by the invention has low raw materials, mild conditions, energy saving and consumption reduction, and is environmentally friendly. It is suitable for industrial mass production, effectively breaking the technical blockade of developed countries such as Europe and the United States on my country, and filling the domestic gap. .

Description

technical field [0001] The invention relates to the technical field of conductor heat flow, in particular to a preparation method of high-temperature synthetic heat-conducting oil. Background technique [0002] Heat transfer oil is an organic heat carrier, which is divided into synthetic type and mineral type. Mineral heat transfer oil is refined by adding additives to the distillate oil formed in the process of high temperature cracking or catalytic cracking of petroleum. The main component is hydrocarbon mixture; synthetic heat transfer oil is produced by chemical synthesis. Chemical structure and definite chemical name, the main feature is that the molecular structure contains aromatic hydrocarbon or cycloalkane structure, and most of them are bicyclic or tricyclic aromatic hydrocarbon compounds. [0003] Synthetic heat transfer oil has a wider temperature range and can be used at low, medium and high temperatures, while mineral heat transfer oil can only be used at low ...

AI Technical Summary

Problems solved by technology

At present, there are still many kinds of synthetic heat transfer oil that cannot be produced domestically and can only be imported. Dowtherm RP produced by Dow Chemical in the United States belongs to this category, which is 1,2,3,4-tetrahydro-1-(1 -Isomer mixture of -phenethyl)naphthalene and 1,2,3,4-tetrahydro-5-(1-phenethyl)naphthalene

It has the advantages of high operating temperature, low saturated steam pressure, and good thermal stability. At present, there is no domestic production, and customers can only rely on imports.

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