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Composite adsorbent and preparation method and application thereof

A composite adsorption and mixed liquid technology, which is applied in chemical instruments and methods, and other chemical processes, can solve the problems that it is difficult to meet the requirements of plant insulating oil acid value and dielectric loss factor index, large amount of adsorbent, complex process, etc. Achieve the effects of simple use method, simple operation and simple preparation method

Pending Publication Date: 2020-06-02
岳阳金瀚高新技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the production process of vegetable insulating oil, the acid value and dielectric loss factor of vegetable oil are usually reduced by alkali refining method, acid clay adsorption refining method, activated alumina method, etc., but the above methods are complicated in process, large in amount of adsorbent, and poor in effect , it is difficult to meet the requirements of vegetable insulating oil in terms of acid value and dielectric loss factor

Method used

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Examples

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Comparison scheme
Effect test

Embodiment 1

[0024] The adsorbent of this embodiment is composed of the following components by mass: 50 parts of basic alumina, 50 parts of clay and 1 part of lanthanum hydroxide; wherein, the particle size of basic alumina is 100 mesh, and the particle size of basic alumina is 100 mesh. The pH of the suspension is 10; the clay is activated bentonite, and the specific activation operation is as follows: immerse the bentonite in dilute sulfuric acid with a mass fraction of 8% for activation, rinse with water until the pH of the lotion is 3.8, and heat at 150°C White clay is obtained after drying.

[0025] The preparation method of present embodiment adsorbent, comprises the following steps:

[0026] (1) Get 100 grams of basic alumina, 100 grams of activated clay and 2 grams of lanthanum hydroxide, add them to the aqueous solution to obtain a mixed solution;

[0027] (2) Adjust the pH value of the mixed solution to 8.0 with ammonia water, filter after the precipitation is complete, and dry...

Embodiment 2

[0031] The adsorbent of this embodiment is composed of the following components by mass: 50 parts of basic alumina, 60 parts of clay and 1.25 parts of lanthanum hydroxide; wherein, the particle size of basic alumina is 200 mesh, and the particle size of basic alumina is 200 mesh. The pH of the suspension is 10; the clay is activated bentonite, and the specific activation operation is as follows: soak the bentonite in dilute sulfuric acid with a mass fraction of 15% for activation, then rinse with water until the pH of the lotion is 4, 180 ° C White clay is obtained after drying.

[0032] The preparation method of present embodiment adsorbent, comprises the following steps:

[0033] (1) Get 100 grams of basic alumina, 120 grams of activated clay and 2.5 grams of lanthanum hydroxide, and add them to the aqueous solution to obtain a mixed solution;

[0034] (2) Adjust the pH value of the mixed solution to 8.2 with ammonia water, filter after the precipitation is complete, and dr...

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Abstract

The invention discloses a composite adsorbent and a preparation method and application thereof. The composite adsorbent comprises the following components in parts by mass: 40-66.6 parts of aluminum oxide, 33.3-60 parts of carclazyte and 0.1-5 parts of lanthanum hydroxide. The preparation method of the composite adsorbent comprises the following steps: (1) preparing raw materials, and adding aluminum oxide, carclazyte and lanthanum hydroxide into a solvent to obtain a mixed solution; and (2) controlling the pH value of the mixed solution to be 7.5-8.5, and carrying out filtering after the reaction is completed to obtain filter residues, namely, the composite adsorbent. The composite adsorbent can be applied to impurity removal and adsorption processes of vegetable insulating oil, has the advantages of strong adsorption capacity and stable chemical properties, and can significantly reduce the acid value and dielectric loss factor of the vegetable insulating oil.

Description

technical field [0001] The invention relates to the field of oil processing, in particular to a composite adsorbent and its preparation method and application. Background technique [0002] Mineral insulating oil is widely used in oil-immersed power transformers, which can play the role of insulation, heat dissipation and cooling, and arc extinguishing. However, due to the defects of low safety, poor degradability and non-renewability of mineral insulating oil, the development of new liquid insulating medium has become a research hotspot and has a good development prospect. Vegetable insulating oil is prepared from natural oil crops by pressing or extracting, refining and other processes. Its physical, chemical and electrical insulation properties are good, and it can meet the requirements of electric power oil. The biodegradation rate is as high as more than 97%, and it will not cause environmental pollution to soil and water sources; the source of raw materials is extensi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/30
CPCB01J20/06B01J20/08B01J20/12
Inventor 罗运柏杨钦彭长根葛文托
Owner 岳阳金瀚高新技术股份有限公司
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