Biphenyl mixed type semi-synthetic organic heat carrier and preparation method and application thereof

The biphenyl-based semi-synthetic organic heat transfer fluid, formed by a mixture of biphenyl compounds, polyethylbenzene, and alkylnaphthalene, solves the problems of high difficulty and high cost in the preparation process of semi-synthetic organic heat transfer fluids in the prior art, and achieves improved stability and performance under high temperature conditions.

CN122168239APending Publication Date: 2026-06-09CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEMICAL CORP
Filing Date
2024-12-02
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing semi-synthetic organic heat transfer fluids require the addition of various functional additives during the preparation process, which leads to high control difficulty and high cost. Furthermore, their performance is poor under high temperature conditions, making it difficult to meet the requirements of industrial production.

Method used

Using a mixture of biphenyl compounds, polyethylbenzene and alkylnaphthalene as the base oil, and by adjusting their proportions, a semi-synthetic organic heat transfer fluid of biphenyl mixture is formed, avoiding the use of antioxidants, dispersants and detergents, and meeting the performance indicators of L-QC320 type products in GB23971-2009 "Organic Heat Transfer Fluids".

Benefits of technology

It achieves cost reduction, improved thermal stability and compatibility, and meets high-temperature performance requirements without the need for functional additives, making it suitable for industrial production.

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Abstract

This invention relates to the field of organic heat transfer fluid technology, providing a biphenyl-based semi-synthetic organic heat transfer fluid, its preparation method, and its applications. The biphenyl-based semi-synthetic organic heat transfer fluid comprises a biphenyl compound, polyethylbenzene, and an alkylnaphthalene, wherein the alkylnaphthalene includes ethylnaphthalene and / or propylnaphthalene; the content of polyethylbenzene in the biphenyl-based semi-synthetic organic heat transfer fluid is 20wt%–35wt%; the mass ratio of the biphenyl compound to the alkylnaphthalene is 1:(0.05–1). The biphenyl-based semi-synthetic organic heat transfer fluid provided by this invention has a simple composition, requires no functional additives, effectively reduces costs and the difficulty of controlling the product preparation process, and possesses a high auto-ignition point and closed-cup flash point, thus exhibiting better thermal stability. This ensures that all performance indicators fully meet the performance requirements of the L-QC320 type product in GB23971-2009, giving it strong market competitiveness.
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