Environment-friendly base oil for fully-enclosed refrigerator oil and preparation method thereof

Abstract

The invention discloses environment-friendly base oil for fully-enclosed refrigerator oil and a preparation method thereof. The basic oil is obtained by mixing hydrogenated base oil with an aromatic compound, wherein the 40-degree kinematic viscosity of the hydrogenated base oil is 20 to 100mm<2> / s, and the %C[A] is 0; the 40-degree kinematic viscosity of the aromatic compound is 10 to 200mm<2> / s and the %C[A] is 5% to 50%. A production process disclosed by the invention is environment-friendly and clean, and production of three wastes such as waste furfural and waste clay is avoided, so that the harm to the health of a human body and environment pollution are avoided; the obtained fully-enclosed refrigerator oil and a freon HCFC refrigerant have excellent compatibility, so that mechanical faults in a refrigeration cycle operation and influence on heat transfer efficiency caused by early separation of oil-agent can be avoided.

Description

technical field [0001] The invention relates to the field of petrochemical industry, in particular to an environment-friendly fully enclosed refrigerating machine oil base oil and a preparation method thereof. Background technique [0002] In recent years, the rapid development of the automobile and home appliance industries has led to the prosperity of the air-conditioning refrigerator compressor manufacturing industry, which in turn stimulated the growth of the demand for fully enclosed refrigeration oil. Fully enclosed refrigeration oil is a special lubricating oil for hermetic refrigeration compressors. The fully enclosed refrigerating machine oil is placed in the same sealed casing as the compressor and the motor, and plays the roles of lubrication, sealing, heat dissipation and electrical insulation during the operation of the compressor, so as to improve the mechanical efficiency and reliability of the compressor. The factors that ensure the normal operation of the c...

AI Technical Summary

Problems solved by technology

At present, there are two types of fully enclosed refrigeration oil production processes that use HCFC, HFC and HC as working fluids: the traditional combination process and the all-hydrogen combination process. "combined process or "atmospheric and vacuum distillation-medium pressure hydrofining-clay supplementary refining" combined process, the hermetic refrigerator oil produced by this traditional process contains a certain amount of aromatic compounds, but the disadvantage is that the solvent involved in the process will It is harmful to human health, and the waste solvent and waste white clay produced at the same time will pollute the environment; the second category is the all-hydrogen combination process of "atmospheric and vacuum distillation-hydrotreating-hydrogenation decondensation-hydrogenation supplementary refining" (see "high pressure Hydrogenation process to produce refrigerating machine oil", Xiong Chunzhu, etc.), this process is green and environmentally friendly, and will not produce waste pollutants to cause environmental pollution, but the fully enclosed refrigerating machine oil obtained is a highly refined non-aromatic oil product, which is similar to HCFC ( Such as R12, R22) refrigerants have poor compatibility, which will affect the heat transfer performance of the compressor and affect the normal operation of the refrigeration compressor

[0004] Chinese patent CN101684416A discloses a production method of base oil for air-conditioning refrigeration machine oil, which uses three-stage hydrogenation to produce fractions greater than 360 °C through a combined process of hydrogen decondensation and white clay supplementary refining to prepare Freon HCFC as the base oil. Refrigerant air conditioner refrigeration machine oil base oil, but the clay adsorption process involved in this method will produce a certain amount of waste clay, which will cause environmental pollution problems, and the adsorption process will reduce the yield of the target product

Mineral oil is properly combined with one or two or more refining means of desolventization, solvent extraction, hydrolysis, solvent dewaxing, contact dewaxing, hydrofining, sulfuric acid washing, and clay treatment; but the process involved in this invention is cumbersome , the solvent and sulfuric acid used in the solvent refining and sulfuric acid washing process are volatile and corrosive, which will increase the risk of safety production, human health hazards and environmental pollution

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