Organic refrigerating/heat conducting medium and preparation method thereof

Abstract

The invention relates to an organic refrigerating / heat conducting medium and a preparation method of the organic refrigerating / heat conducting medium and belongs to the technical field of organic material synthesis. The medium is prepared by taking propylene glycol, 1-butyl-3-methylimidazole fluoroform sulfonate and deionized water as a base solution and benzoic acid, adipic acid, triethanolamine, benzo triazole, organic phosphate and low molecular weight methacrylic acid / acrylic acid copolymer salt as a corrosion and scale inhibitor for heating, stirring and dissolution. The prepared organic refrigerating / heat conducting medium can keep a good flowing property at a low temperature and have a higher flash point and stable chemical properties at middle and high temperatures, has excellent corrosion and scale inhibition performance for multiple metals in a refrigerating / heat conducting system and effectively prevents electrochemical corrosion and hot corrosion. Reserve alkalinity is greater than 15mL, so that the medium has a stable PH (potential of hydrogen) value, and a long residual action of the performance of the medium is ensured; a heat conductivity coefficient of the medium is slightly better than that of heat conducting oil; and the medium can achieve normal operation in a temperature range of -50-150 DEG C. Raw material sources are direct and easy to obtain; operating requirements on equipment are low; and large-scale industrial production is easy to achieve.

Description

technical field [0001] The invention relates to the field of organic materials, in particular to an organic cold / heat conducting medium and a preparation method thereof. Background technique [0002] At present, the important heat transfer medium of heating oil furnace in industrial production is heat transfer oil. [0003] Heat transfer oil has the characteristics of high boiling point, high flash point, accurate temperature control, high temperature under low vapor pressure, good heat transfer effect, energy saving, convenient transportation and operation, etc., and has been widely used in various indirect heat transfer fields in recent years . Although heat transfer oil has many advantages, it also has many fatal disadvantages. (1) Easy to coke. After the coking phenomenon occurs, it not only hinders the flow of heat transfer oil, reduces heat transfer efficiency and increases fuel consumption, but also causes local overheating deformation of the pipeline and the possi...

AI Technical Summary

Problems solved by technology

After the coking phenomenon occurs, it not only hinders the flow of heat transfer oil, reduces heat transfer efficiency and increases fuel consumption, but also causes local overheating and deformation of the pipeline to cause explosion.

(2) Easy to corrode

The nitrogen sealing effect in the heat transfer oil system is not good. In the presence of oxygen, it is easy to oxidize into phytic acid and colloids to adhere to the oil pipeline. Risk of running leaks

Moreover, due to its complex composition, it is particularly difficult to add corrosion and scale inhibitors to solve its corrosion problems. At present, there is no successful case of adding corrosion inhibitors to heat transfer oil to solve its corrosion

(3) Frequent replacement

(4) The operating environment has very strict requirements on water content, and a small amount of water can bring great harm to the system operation

[0004] Conventional antifreezes such as ethylene glycol type and propylene glycol type can obtain a better freezing point, but the boiling point is generally below 110°C, and cannot be used as a heat transfer medium in the medium and high temperature range.

[0005] In addition to heat transfer oil, heat transfer media with low freezing point and high boiling point are rare in industrial applications