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

A technology of Jatropha japonica oil and nano-molecular sieve, which is applied in the fields of fat oil/fat refining, chemical instruments and methods, other chemical processes, etc., can solve the problems of cumbersome operation process, difficult to remove impurities, high acid value of vegetable oil, and simplify the deacidification operation. Process, color is clear and transparent, the effect of improving the deacidification efficiency

Pending Publication Date: 2021-10-29
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The preparation method of the alkaline nano-sieve that reduces the oil-soluble acidity of jatropha insulating oil, the specific steps include:

[0030] S1 pretreatment: use strong acid to pretreat the molecular sieve to enhance the adsorption capacity of the molecular sieve;

[0031] S11: Take 30g of 13X type molecular sieve and add appropriate amount of 6mol / L hydrochloric acid to impregnate for 2 hours;

[0032] S12: Calcining the hydrochloric acid-modified molecular sieve at a high temperature of 400° C. for 1 hour to obtain a highly active molecular sieve;

[0033] S2 preparation of modified molecular sieves: carrying out alkalization modification on molecular sieves to obtain alkaline nano-molecular sieves used in Jatropha deacidification process;

[0034] S21: Mix the highly active molecular sieve obtained in step S1 with 150g of CaO powder, then add 225ml of water and spread the water on the tray to control the thickness of the solution to be less than 0.5mm;

...

Embodiment 2

[0040] The preparation method of the alkaline nano-sieve that reduces the oil-soluble acidity of jatropha insulating oil, the specific steps include:

[0041] S1 pretreatment: use strong acid to pretreat the molecular sieve to enhance the adsorption capacity of the molecular sieve;

[0042] S11: Take 40g of 13X molecular sieve and add an appropriate amount of 6mol / L hydrochloric acid to impregnate for 2 hours;

[0043] S12: Calcining the hydrochloric acid-modified molecular sieve at a high temperature of 400° C. for 1 hour to obtain a highly active molecular sieve;

[0044] S2 preparation of modified molecular sieves: carrying out alkalization modification on molecular sieves to obtain alkaline nano-molecular sieves used in Jatropha deacidification process;

[0045] S21: Mix the highly active molecular sieve obtained in step S1 with 200g of CaO powder, then add 300ml of water and spread the water on the tray to control the thickness of the solution to be less than 0.5mm;

[...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B3/10B01J20/18B01J20/30
CPCC11B3/10B01J20/18
Inventor 沙洲黄正勇李剑罗尧王飞鹏陈伟根
Owner CHONGQING UNIV
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