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Preparation method of high-purity hydrogenated terphenyl heat conduction oil

A hydrogenated terphenyl and heat transfer oil technology, applied in chemical instruments and methods, heat exchange materials, distillation purification/separation, etc., can solve the problem of non-ideal components of pentaphenyl and pentaphenyl, Issues such as by-products of quaterphenyl and pentaphenyl were not raised, which achieved the effects of reducing energy consumption, improving purity, and avoiding pipeline blockage

Inactive Publication Date: 2020-04-17
江苏曼拓化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The application excludes the by-product biphenyl, but does not propose by-products such as quaterphenyl and pentaphenyl, nor does it provide a solution to the non-ideal components of pentphenyl and pentaphenyl

Method used

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  • Preparation method of high-purity hydrogenated terphenyl heat conduction oil
  • Preparation method of high-purity hydrogenated terphenyl heat conduction oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The preparation method of the high-purity hydrogenated terphenyl heat-conducting oil of the present embodiment comprises the following steps:

[0022] ① A vacuum distillation tower is connected behind the terphenyl hydrogenation reactor, and the feed port of the vacuum distillation tower is connected with the outlet port of the hydrogenation reactor.

[0023] ② Sampling the product after terphenyl hydrogenation reaction for gas chromatography analysis to determine the components and their content in the product.

[0024] In this example, after gas chromatography analysis, the contents of each component in the product after the terphenyl hydrogenation reaction are as follows: 32.7% of partially hydrogenated o-terphenyl, 31.5% of partially hydrogenated m-terphenyl, 20.3% of partially hydrogenated p-terphenyl, and 20.3% of partially hydrogenated Querphenyl isomer mixture 9.7%, partially hydrogenated pentphenyl isomer mixture 4.3%, unknown component 1.5%.

[0025] ③ Open t...

Embodiment 2

[0034] The rest of the preparation method of the high-purity hydrogenated terphenyl heat-conducting oil of the present embodiment is the same as that of Example 1, the difference being: 4. close the feed inlet valve after the loading is complete, open the tower top valve, The temperature of the vacuum distillation tower is raised to 283°C, and the material at the top of the tower enters the product storage tank after being cooled by a heat exchanger.

[0035] Sampling chromatographic analysis showed that the content of hydrogenated terphenyl was 93.6%.

Embodiment 3

[0037] All the other preparation methods of the high-purity hydrogenated terphenyl heat-conducting oil of the present embodiment are the same as in Example 1, the difference being: 4. close the feed inlet valve after the loading is complete, open the tower top valve, The temperature of the vacuum distillation tower is raised to 248°C, and the material at the top of the tower is cooled by a heat exchanger and then enters the product storage tank.

[0038] Sampling chromatographic analysis showed that the content of hydrogenated terphenyl was 93.5%.

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Abstract

The invention discloses a preparation method of a high-purity hydrogenated terphenyl heat conduction oil. The preparation method comprises the following steps: (1) connecting a reduced pressure distillation tower behind a terphenyl hydrogenation reaction kettle; (2) sampling a product obtained after the hydrogenation reaction of terphenyl, and carrying out chromatographic analysis to determine each component and the content thereof in the product; (3) vacuumizing the reduced pressure distillation tower, and self-sucking a material in a hydrogenation reaction kettle into the reduced pressure distillation tower; and (4) closing a feed port valve after charging is finished, opening a tower top valve, carrying out reduced pressure distillation to collect tower top materials, cooling the towertop materials through a heat exchanger, and feeding into a product storage tank. By adopting the method disclosed by the invention, the content of non-ideal components, namely hydrogenated tetraphenyland hydrogenated pentaphenyl, is reduced, the purity of hydrogenated terphenyl is improved, the heat conductivity coefficient is increased, and when the hydrogenated terphenyl is used as heat conduction oil, the heat transfer efficiency of the product is improved, the energy consumption is reduced, and the problems of pipeline blockage and equipment corrosion are avoided.

Description

technical field [0001] The invention relates to a preparation method of high-purity hydrogenated terphenyl heat-conducting oil. Background technique [0002] Hydrogenated terphenyl is a kind of heat-conducting oil with excellent performance. The main product of heat transfer oil above 300°C. Since the heat transfer oil is used in a long-term cycle at high temperature, it is required to have good thermal stability, good thermal conductivity (that is, high thermal conductivity and specific heat), low viscosity, good pumpability, low pour point, flash point and High ignition point, low toxicity, low corrosion, and low vapor pressure when used in liquid phase. [0003] At present, the production process of hydrogenated terphenyl is to use platinum oxide as a catalyst after the synthesis of terphenyl isomers, at a temperature of 250°C to 260°C, and a hydrogen pressure of 60 to 80kg / cm 2 Under the above conditions, hydrogenation of terphenyls is carried out on a hydrogenation u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C7/04C07C13/28C09K5/10
CPCC07C7/04C09K5/10C07C2601/16C07C13/28Y02P20/10
Inventor 杨雨飞杨轶林
Owner 江苏曼拓化学有限公司
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