31 results about "Hydrogenated terphenyls" patented technology

The invention discloses a bonding agent for stemming of a large-scale blast furnace, belonging to the technical field of stemming of a blast furnace. The bonding agent for stemming of the large-scale blast furnace comprises the following components in parts by mass: 40 to 50 parts of asphalt, 4 to 6 parts of hydrogenated terphenyl, 10 to 12 parts of organic silicon resin, 8 to 11 parts of furan resin and 11 to 15 parts of melamine formaldehyde resin, wherein the furan resin is furfuryl alcohol resin; the asphalt is petroleum asphalt, wherein the earth asphaltene in the petroleum asphalt is of 25 to 30%. According to the bonding agent disclosed by the invention, the organic silicon resin, the furan resin and the melamine formaldehyde resin are compounded to be served as the component of the curing agent, and moreover, the hydrogenated terphenyl is served as the synergist, thus high plasticity can be obtained, and low curing rate is ensured; reduction of the curing rate of the bonding agent is beneficial for improving the liquidity of the stemming at high temperature, therefore, the stemming is hardly blocked in a mud gun; if the bonding agent disclosed by the invention is added for preparing the stemming, the stemming has good performance on opening; and moreover, the bonding agent has resistance to scouring and eroding of high-temperature scrap iron in slag, and has no pollution to the environment.

The invention provides a method for preparing 2,7-dicarboxylic-3,6-naphthalenedicarboxylate. The method comprises the following steps: firstly, converting 2,7-dicarboxylic naphthalinum into 2,7-dicarboxylic potassium salt by alkalization; then adding a high-temperature heat medium of hydrogenated terphenyl, obtaining naphtholate; afterwards introducing carbon dioxide, reacting for 4 hours at the temperature of 300-330 DEG C and the pressure of 4-6MPa and obtaining a yellow solid product of the 2,7-dicarboxylic-3,6-naphthalenedicarboxylate by the post-treatment steps of dissolving, filtering, drying and the like. The invention has less synthesis steps, easy operation and low cost. Compared with the prior art, the yield is enhanced by more than 4 times.

The invention discloses a preparation method of a bonding agent for blast furnace stemming with good opening performance, belonging to the field of the blast furnace stemming. The preparation method comprises the following steps of: (1) weighing 40-50 parts of asphalt and 4-6 parts of hydrogenated terphenyl in parts by weight, adding the asphalt and the hydrogenated terphenyl in a reaction kettle in sequence, and agitating and mixing for 20 minutes at the temperature of 55-60 DEG C; and (2) weighing 10-12 parts of organic silicon resin, 8-11 parts of furan resin and 11-15 parts of melamine-formaldehyde resin in parts by weight, controlling the temperature rise rate of the reaction kettle in the step (1) to be 3-4 DEG C / min, adding the organic silicon resin, the furan resin and the melamine-formaldehyde resin in the reaction kettle in sequence after the temperature of the reaction kettle reaches 72-76 DEG C, and continuously agitating and mixing for 16 minutes. The preparation method disclosed by the invention is simple in machining process and low in production cost; and once the bonding agent prepared by the invention is added to make the stemming, the stemming is good in opening performance, is resistant to the scouring and corrosion of high-temperature slag iron, and does not generate pollution to the environment.

The invention provides a hydrogenated terphenyl type high-temperature nano heat conduction oil, its preparation method and application. The heat-conducting oil of the present invention includes hydrogenated terphenyl heat-conducting oil, nanoparticles, a drag reducer and a dispersant, the surface of the nanoparticles is coated with a dispersant to form modified nanoparticles, and the modified nanoparticles are dispersed in the heat-conducting oil A suspension type heat transfer oil is formed, and the nanoparticles are metals, metal oxides, non-metals and / or non-metal oxides. The heat conduction oil of the present invention has the advantages of good thermal stability, fast heat transfer speed, uniform heating and large energy storage in the heat transfer medium, the highest service temperature reaches 460°C, and the service life is more than 3 years.

A heat transfer fluid comprising about 20 to about 80% by weight terphenyls and from about 20 to about 80% by weight partially hydrogenated terphenyls, wherein preferably the terphenyls and partially hydrogenated terphenyls comprise a reclaimed product from a degraded heat transfer fluid initially comprised primarily of partially hydrogenated terphenyls.