12 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 invention discloses a method and a system for preparing hydrogenated terphenyl. The method comprises the following steps: (1) carrying out hydroalkylation reaction on reaction benzene and hydrogen; (2) the hydroalkylation product and the raw material benzene are subjected to normal pressure rectification together, a light component material flow, a benzene-containing material flow and a heavy component material flow are obtained, and the benzene-containing material flow partially or completely enters the step (1) to serve as the reaction benzene; (3) carrying out reduced pressure rectification on the heavy component material flow to obtain a material flow containing cyclohexylbenzene and hydrogenated terphenyl; and (4) mixing the cyclohexylbenzene-containing material flow with diisopropylbenzene, carrying out a transalkylation reaction to obtain a transalkylation product, and recycling the transalkylation product back to the normal-pressure rectification in the step (2). According to the method, hydroalkylation and transalkylation reaction are combined, and normal-pressure rectification and reduced-pressure rectification are combined, so that hydrogenated terphenyl is obtained; wherein a composite mode of the atmospheric tower and the vacuum tower greatly reduces the operation difficulty of the device and improves the separation efficiency.

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 application discloses a method and system for preparing hydrogenated terphenyl and the obtained hydrogenated terphenyl, and the method comprises the following steps: carrying out N-stage reactions by taking hydrogen and C6 components from a C6 removal tower as raw materials, wherein N is greater than or equal to 2, and the reaction product enters the C6 removal tower after the N-stage reactions are completed; wherein, fresh benzene is taken as the feed in the C6 removal tower, the C6 components are taken out from a side line, overhead materials are taken out, and a product containing hydrogenated terphenyl is taken out from a tower bottom. The application can realize the preparation of the hydrogenated terphenyl by taking cheap benzene and hydrogen as raw materials under the conditions that the temperature is 130-280 DEG C (preferably 150-220 DEG C) and the pressure is 0.5-2.5 MPaG (preferably 1.0-2.0 MPaG), thereby avoiding the high-temperature cracking operation of benzene.

The invention provides a method and a system for producing hydrogenated terphenyl. The method comprises the following steps: (1) carrying out hydroalkylation reaction on a benzene-containing raw material and hydrogen under the action of a catalyst to obtain a reaction product; and (2) carrying out C6 removal treatment on the reaction product to obtain a circulating C6 material flow containing benzene, methyl cyclopentane and cyclohexane and a material flow containing hydrogenated terphenyl, and carrying out heat exchange on the circulating C6 material flow and the reaction product in the step (1) after the circulating C6 material flow is cooled. According to the method and the system disclosed by the invention, heat removal and heating are realized at the same time in a self-heat-exchange manner of reactants such as circulating C6 material flow and reaction products, reaction heat is fully utilized, and the problem of high energy consumption in a hydrogenated terphenyl production process is well solved.

This invention relates to the field of heat transfer oils and discloses a hydrogenated terphenyl heat transfer oil and its preparation method. The hydrogenated terphenyl heat transfer oil contains cyclohexylbiphenyl, dicyclohexylbenzene, tercyclohexane, and dicyclohexylbenzene. Based on the total amount of the hydrogenated terphenyl heat transfer oil, the content of cyclohexylbiphenyl, dicyclohexylbenzene, tercyclohexane, and dicyclohexylbenzene is not less than 75% by weight, preferably not less than 80% by weight. This invention uses a solid acid catalyst to alkylate biphenyl with cyclohexene and / or cyclohexanol, followed by separation and partial hydrogenation using a hydrogenation catalyst. This results in a high yield of hydrogenated terphenyl, low energy consumption in the preparation process, and the ability to obtain a hydrogenated terphenyl heat transfer oil with a low pour point, which can replace traditional hydrogenated terphenyl products.

The tubular Fischer-Tropsch synthesis reactor comprises a first sealing head, a reactor shell and a second sealing head which are sequentially connected, a synthesis gas inlet is formed in the first sealing head, and a gas distributor communicated with the synthesis gas inlet is arranged in the first sealing head; a reaction product outlet is formed in the bottom of the second sealing head; a plurality of reaction tubes capable of being filled with a catalyst are arranged in the reactor shell; the reactor shell is provided with a first medium inlet and a first medium outlet which are connected with the first medium heat exchange system, and a second medium inlet and a second medium outlet which are connected with the second medium heat exchange system, and the first medium is air or nitrogen or steam or helium or argon; and / or the second medium is mineral oil or channel oil or hydrogenated terphenyl or silicon-based heat conduction oil or fused salt or ionic liquid. The reactor can meet accurate control of different temperature requirements in a pretreatment stage and a reaction stage, and can solve the problems of poor heat exchange effect, local overheating of a catalyst bed layer and non-uniform temperature distribution.

The application relates to the field of heat conducting oil, and discloses a hydrogenated terphenyl type high-temperature heat conducting oil and a preparation method thereof. The heat conducting oil contains dicyclohexylbenzene, cyclohexylbiphenyl and terphenyl, and the content of the cyclohexylbiphenyl in the heat conducting oil is not less than 40% by weight. In the application, the solid acid catalyst is used to perform an alkylation reaction on cyclohexylbenzene, cyclohexene and / or cyclohexanol, then the product is separated, and then the separated product is subjected to a partial dehydrogenation reaction through a dehydrogenation catalyst, so that the yield of the hydrogenated terphenyl is high, the preparation process is simple, the energy consumption is low, the stability is good, and the product meets the corresponding requirements in the national standard.

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.