A kind of method for preparing hydrogenated terphenyl

Abstract

The invention discloses a method for preparing hydrogenated terphenyl. The method comprises the following steps: (1) synthesizing biphenyl; (2) rectifying for the first time; (3) rectifying for the second time; (4) hydrogenating. According to the method, an efficient and energy-saving pipe type reactor is utilized, so that the energy consumption can be greatly reduced and the conversion rate of a product is high. By technically improving the process, the conversion rate of the terphenyl can be greatly improved under the conditions of not influencing the service life of equipment and not increasing the energy consumption, and the conversion rate can be up to about 70%; the raw material problems of the hydrogenated terphenyl can be sufficiently solved so that the market requirements can be met relatively.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis and relates to a preparation method of hydrogenated terphenyl. Background technique [0002] The development of heat transfer oil has a history of more than 60 years abroad. The initial heat transfer oil was produced in the early 1930s and was Dowtherm developed by Dow Chemical Company of the United States. In the 1950s, the United States adopted a deep refining process to produce mineral oil-type heat transfer oil. Since the 1960s, Japan and Germany have launched ethylbiphenyl series and benzyltoluene series heat transfer oils with excellent performance respectively, and then other countries have launched similar products one after another. At the end of the 1970s, my country began to develop and produce synthetic heat transfer oil, but the level of industrialization was still low at that time, and it was not rationally developed, and the development was slow; in the 1970s, some forei...

AI Technical Summary

Problems solved by technology

At the end of the 1970s, my country began to develop and produce synthetic heat transfer oil, but the level of industrialization was still low at that time, and it was not rationally developed, and the development was slow; in the 1970s, some foreign manufacturers added various types of additive

At present, the total domestic production of hydrogenated terphenyls is about 10,000 tons, which is far from meeting market demand.

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