Synthesis of trimethylolpropane organic acid ester and application in special oil

Abstract

The invention discloses a synthesis method of trimethylolpropane organic acid ester, which is characterized by comprising the following steps of: taking organic acid and organic alcohol as raw material, further adding proper amount of catalyst, reacting for 3-5 hours under normal pressure at 110-130 DEG C, thereby obtaining the trimethylolpropane organic acid ester; the organic acid is selected from any one of Oleic acid, lauric acid, octanoic acid, stearic acid and palmitic acid, the organic alcohol is trimethylolpropane, and molar ratio of organic acid to organic alcohol is 1:3; the catalyst is N-alkyl pyrrolidone group methyl phosphate ion liquid catalyst. In the synthesis method, the N-alkyl pyrrolidone group methyl phosphate ion liquid catalyst is selected for synthesizing the trimethylolpropane organic acid ester, the synthesis method has the characteristics of low reaction temperature, small dosage of catalyst, short reaction time, high esterification rate, and so on, and products produced by the synthesis method has small acid value.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to the synthesis of trimethylolpropane organic acid ester and its application in special oil. Background technique [0002] Trimethylolpropane trioleate (TMPTO) is abbreviated as TMPTO, which has excellent anti-wear properties of synthetic esters. It has excellent viscosity-temperature characteristics, good low-temperature characteristics, high-temperature stability, and low volatility, so it can meet Higher lubrication requirements, especially suitable for applications in the special oil industry. [0003] Trimethylolpropane organic acid ester has the characteristics of excellent lubricating performance, high viscosity index, good flame resistance, high biodegradation rate and low toxicity. It is a kind of green lubricating oil. It is widely used in steel pipe drawing oil, cutting oil and other metal processing fluids. Trimethylolpropane organic acid ester can also be used as an i...

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Problems solved by technology

[0004] The synthetic method of existing trimethylolpropane organic acid ester mainly contains direct esterification method and transesterification method, and these methods use protonic acid, metal oxide, inorganic salt catalyst etc. more, and synthetic method is either that reaction temperature is high, or reaction time is long , and low conversion rate, poor product quality, serious equipment corrosion, difficult post-reaction treatment, serious waste acid pollution, etc.

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