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High-temperature synthetic heat conducting oil

A heat-conducting oil and high-temperature technology, applied in the chemical industry, can solve problems such as low terphenyl yield, insufficient supply of terphenyl, complex hydrogenation process and equipment, etc., achieve simple process conditions, make up for insufficient raw material sources, and facilitate the reaction process The effect of control

Inactive Publication Date: 2019-03-12
JIANGSU ZHONGNENG CHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Hydrogenated terphenyl is currently a widely used high-temperature synthetic heat transfer oil, and it is the first choice for many heat transfer devices. It is obtained by partially hydrogenating a mixture of o-, m-, and p-terphenyls, and the raw material of hydrogenated terphenyls is The by-product of biphenyl is produced by the high-temperature condensation of benzene, and the yield of terphenyl is extremely low, so that the raw material terphenyl of hydrogenated terphenyl is seriously in short supply, and the hydrogenation process and equipment are complicated, so it is urgent to find a source of raw material Wide, simple preparation process, high yield heat transfer oil to replace the heat transfer oil of hydrogenated terphenyl

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Add 300g of biphenyl into the four-necked flask, heat and melt, add 15g of aluminosilicate catalyst after the biphenyl is melted, set the reaction temperature to 215°C, and when the reaction temperature is reached, start to pour the mixture into the reaction system at a rate of 1s / drop Cyclohexene was added dropwise. When cyclohexene was distilled off in the condensation reflux device connected with the four-necked flask, the dropwise addition of cyclohexene was stopped, and the reaction ended. The reaction solution is cooled, the catalyst is filtered, and transferred to a rectification kettle for rectification, the biphenyl and some light components in front are cut off, and the latter components are collected to obtain a cyclohexylbiphenyl composition. Gained product is carried out gas chromatographic analysis, and result is as follows table 1:

[0021] Table 1

[0022] components

[0023] Among them, polybiphenyls and partially hydrogenated polybiphenyls ...

Embodiment 2

[0025] The cyclohexylbiphenyl composition was obtained according to the method in Example 1, and its performance test and thermal stability test were carried out according to the standard of heat transfer oil. The test results are shown in Table 2 below:

[0026] Table 2

[0027]

[0028]

Embodiment 3

[0030] Obtain the cyclohexylbiphenyl composition according to the method in Example 1, mix it with commercially available hydrogenated terphenyl according to the mass ratio of 1:1, and perform performance test and thermal stability test on the mixed sample, the test results are as follows 3 shows:

[0031] table 3

[0032]

[0033]

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PUM

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Abstract

The invention discloses high-temperature synthetic heat conducting oil which is a cyclohexyl biphenyl composition or mixture of the cyclohexyl biphenyl composition and hydrogenated terphenyl which aremixed according to any proportions. The high-temperature synthetic heat conducting oil can replace industrially widely used hydrogenated terphenyl heat conducting oil. The cyclohexyl biphenyl composition has excellent heat stability, can be individually used as high-temperature heat conducting oil, runs in a 350 DEG C working environment for a long time and can also be mixed with the hydrogenatedterphenyl according to any proportions to prepare the heat conducting oil, and the shortcoming of raw material source shortage of industrial hydrogenated terphenyl is effectively overcome. Moreover,preparation raw materials of the cyclohexyl biphenyl composition are simple and easy to obtain, process conditions are simple, the reaction process is easily controlled, and catalysts can be recycled.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a high-temperature synthetic heat transfer oil. Background technique [0002] With the rapid development of my country's petrochemical fiber industry, the demand for high-temperature heating in new processes is increasing and the requirements are getting higher and higher, making more and more people in China realize the importance of heat transfer oil. In addition, my country's industrial technology is becoming more and more Maturity makes the field of application of heat transfer oil further expand. [0003] Heat transfer oil is divided into mineral oil and high temperature synthetic type. Mineral heat transfer oil is a by-product of petrochemical industry. It is processed and blended. It is essentially a mixture of long-chain alkanes and cycloalkanes. However, its thermal stability and anti-oxidation performance are not good, and it is generally necessary to add addi...

Claims

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Application Information

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IPC IPC(8): C09K5/10
CPCC09K5/10Y02P20/584
Inventor 王志钢
Owner JIANGSU ZHONGNENG CHEM TECH CO LTD
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