Preparation method of alkaline nano sieve for reducing oil-soluble acidity of jatropha curcas insulating oil

Abstract

The invention relates to a preparation method of an alkaline nano sieve for reducing oil-soluble acidity of jatropha curcas insulating oil. The method comprises the following specific steps: S1, pretreatment: pretreating a molecular sieve with strong acid to enhance the adsorption capacity of the molecular sieve; and S2, preparing a modified molecular sieve: carrying out alkalization modification on the molecular sieve to prepare an alkaline nano molecular sieve for a jatropha curcas deacidification process. The step S1 specifically comprises the following steps: S11, adding a proper amount of 6mol / L hydrochloric acid into the molecular sieve, and dipping for 2 hours; and S12, roasting the molecular sieve modified by hydrochloric acid at a high temperature of 400 DEG C for 1 hour to obtain the high-activity molecular sieve. The alkaline nano molecular sieve prepared by the method has strong adsorption capacity, can be used for removing acid through a physical process and a chemical process, can also be used for effectively removing impurities with small molecular weight of which the molecular radius is less than 10, and meanwhile, the molecular sieve has a large specific surface area and is in full contact with jatropha curcas oil, so that the reaction time is shortened, and the deacidification effect is good.

Description

technical field [0001] The invention relates to the technical field of acid-reducing treatment of plant insulating oil, in particular to a preparation method of an alkaline nano-sieve for reducing the oil-soluble acidity of jatropha insulating oil. Background technique [0002] As an important liquid insulating medium, insulating oil is widely used in electrical equipment such as transformers. Traditional mineral insulating oil has excellent physical and chemical properties, electrical insulation and cooling properties, and can play the role of insulation, heat dissipation and cooling, and arc extinguishing. It has been widely used in oil-immersed power transformers for nearly a hundred years. However, the ignition point of mineral insulating oil is low. In the case of transformer overheating or internal short circuit fault, fire or explosion accidents may occur, which cannot meet the requirements of high fire performance in mines, military facilities and high-rise buildings...

AI Technical Summary

Problems solved by technology

But this traditional alkali refining method has the following disadvantages: (1) time-consuming and labor-intensive, the operation process is very cumbersome, a certain high temperature needs to be maintained during the reaction process, and further washing and separation are required after the reaction is completed

(2) The strong alkali solution added will also lead to partial hydrolysis of triglycerides and loss of raw materials

There are also deficiencies in the method of using the prepared deacidifying agent to carry out vegetable oil deacidification: (1) the deacidification method is aimed at other vegetable oils, and the research on the deacidification effect of Jatropha is unknown

(2) The deacidification effect is better, but the acid value of the vegetable oil after deacidification is still high, and it is difficult to meet the industry standard of vegetable insulating oil

(3) It is difficult to remove other small molecular weight impurities in jatropha oil