6 results about "Hydrogenated terphenyls" patented technology

The invention discloses a method for recycling and reusing a light byproduct of biphenyl alcohol monochloride, and relates to the technical field of organic matter recycling, and the method comprises the following steps: firstly, adsorbing and purifying a fraction generated by rectifying 3-chloro-2-methyl biphenyl in a biphenyl alcohol synthesis process by using specifically prepared modified activated carbon; the modified activated carbon is prepared through deep activation, silicon dioxide network construction and stearoyl chloride hydrophobization treatment, impurities can be efficiently removed, and self hydrophobicity is stable. And carrying out catalytic hydrogenation on the purified material in a hydrogenation reactor under the action of the modified activated carbon supported ruthenium-palladium bimetallic catalyst. The reaction product is subjected to post-treatment and distillation, fractions are collected, and the high-value hydrogenated terphenyl heat-conducting oil can be recovered.

The utility model relates to the technical field of viscosity testing equipment, in particular to a hydrogenated terphenyl heat-conducting oil cleaning agent viscosity testing device which comprises an operating platform and a testing mechanism, the testing mechanism comprises a detection unit, a working assembly and a clamping unit, the detection unit is fixedly connected with the working table, the working assembly comprises a base, a driving part, a driving gear, a driven gear, a rotating rod, a rotating disc and an auxiliary part, the base is fixedly connected with the working table, the driving part is fixedly connected with the base, and the driving gear is fixedly connected with the driving part; the driven gear is meshed with the driving gear, the rotating rod is fixedly connected with the driven gear, the rotating disc is fixedly connected with the rotating rod, the auxiliary part is fixedly connected with the rotating disc, and the clamping unit is slidably connected with the rotating disc, so that continuous testing operation on the viscosity of the cleaning agent can be realized, and the operation efficiency of testing the viscosity of the cleaning agent is effectively improved.

The application provides a method for producing pyromellitic anhydride by a pyromellitic acid dehydration process and belongs to the technical field of organic compound synthesis. The method comprises the following steps: (1) dissolving pyromellitic acid in an organic solvent and heating and dehydrating; and (2) cooling and crystallizing and separating to obtain pyromellitic dianhydride. The organic solvent comprises diphenyl ether and hydrogenated terphenyl. The mixture of diphenyl ether and hydrogenated terphenyl is used in the application, the low-temperature operation window is expanded, and better PMDA yield and PMDA purity are obtained compared with the case of using diphenyl ether or hydrogenated terphenyl as the solvent, and the problems of easy formation of a viscous system, narrow temperature operation window and inconvenient operation during low-temperature crystallization in the prior art are solved.

A method, reaction system, multi-stage composite reactor, and resulting hydrogenated terphenyl are disclosed. The method includes feeding, reaction, and discharging. The reaction includes contacting the feed with a catalyst. The reaction comprises n stages in series, with catalysts in each stage loaded in a gradient manner, wherein n ≥ 3. The feed is divided into n groups and enters each of the n stages of the reaction. The feed includes raw materials and hydrogen, wherein the raw materials contain benzene. The system and method for producing hydrogenated terphenyl of this invention can produce hydrogenated terphenyl at different scales, can adapt to catalysts at different reaction temperatures, and ensures the same selectivity of hydrogenated terphenyl in each reactor.

The present application relates to the technical field of heat conducting oil, in particular to a hydrogenated terphenyl high-temperature heat conducting oil and a preparation process thereof.The solid acid catalyst is first applied to the alkylation reaction of cyclohexylbenzene and cyclohexene, and then a partial dehydrogenation reaction is carried out through a dehydrogenation catalyst; the dehydrogenation catalyst comprises HY molecular sieve modified by ammonium fluoride and cobalt-doped activated carbon formed by high-temperature carbonization of a chitosan-cobalt complex loaded on the surface of the HY molecular sieve.The prepared dehydrogenation catalyst can adapt to the fixed-bed continuous reaction process, the hydrogenated terphenyl high-temperature heat conducting oil prepared has stable quality, can meet the needs of industrialized continuous production, and has good industrial application prospect.

The application relates to the technical field of non-silicon heat-conducting paste processing, in particular to a non-silicon heat-conducting paste with ultra-low thermal resistance and high-temperature resistance and a preparation method thereof, which is prepared from the following raw materials in parts by weight: alkyl naphthalene 30-50 parts, alkyl benzene 5-15 parts, hydrogenated terphenyl 10-20 parts, polyether base oil 5-10 parts, superfine heat-conducting filler 60-80 parts, structure directing agent 4-8 parts, perfluoropolyether phosphate 0.5-1 part and antioxidant 1-3 parts. By adopting the above formula, a non-silicon compound oil phase system is constructed, the superfine heat-conducting filler, the structure directing agent and the perfluoropolyether phosphate are combined, high thermal conductivity, ultra-low thermal resistance and excellent interface adhesion are realized, the risk of silicon volatilization pollution is completely eliminated, high-temperature oxidation resistance and long-term reliability are improved, and the urgent needs of 5G, AI and other high-heat-density electronic equipment for non-silicon high-performance thermal interface materials are effectively met.