Regeneration method of silica gel bleaching sand for petroleum or animal and vegetable oil refining

A technology of animal and vegetable oils and decolorized sand, which is applied in the petroleum industry, separation methods, filter regeneration, etc., can solve the problems of destroying the structure of silica gel decolorized sand, poor quality, and deactivation of white clay, so as to improve the operating environment and reduce labor intensity , to solve the effect of emissions

Active Publication Date: 2015-03-25
烟台神洲能源科技有限公司
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Problems solved by technology

At present, there are mainly five regeneration methods of waste silica gel decolorizing sand: one is high-pressure pressing method, which contains 10% oil (weight ratio) after pressing, and silica gel decolorizing sand cannot be recycled.
The second is the alkaline water boiling method. This method can only recover 5-20% (mass ratio) oil, and the quality is not good. At the same time, the structure of the silica gel decolorizing sand is destroyed, and a large amount of waste water is generated.
The third kind of

Method used

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  • Regeneration method of silica gel bleaching sand for petroleum or animal and vegetable oil refining

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example 1

[0026] Example 1: One-time extraction: (1) Add 500ml of waste silica gel decolorizing sand to be processed into the extraction reaction kettle, and replace it with nitrogen for 3 times, then add 500ml of non-polar solvent SHD30 solvent oil into the extraction kettle at a temperature of 40 ℃, stirred for 15 minutes, after the stirring was completed, nitrogen pressure was filtered, and the pressure was controlled at 0.15Mpa. That is, 100 grams of waste silica gel decolorizing sand can extract 30 grams of oil), which is the first extraction; add 500 ml of mixed solution to the extraction reaction kettle, and the mixed solution is composed of 70% No. 120 solvent oil, 30% n-butyl acetate Ester, control the temperature at 40°C, stir for 40 minutes, the filtrate contains 7% oil, that is, 100 grams of waste silica gel decolorization sand can extract 7 grams of oil, the filtrate is dark red, filtered and dried, and the regeneration is completed.

example 2

[0027] Example 2: One-time extraction: (1) Add 600ml of waste silica gel decolorizing sand to be processed into the extraction reaction kettle, fill with nitrogen for 3 times, add 600ml of non-polar solvent 120 solvent oil into the extraction kettle, and the temperature is 40 ℃, stirred for 15 minutes, after the stirring was completed, nitrogen pressure was filtered, and the pressure was controlled at 0.15Mpa. That is, 100 grams of waste silica gel decolorizing sand can extract 25 grams of oil), which is the first extraction; add 600 ml of mixed solution to the extraction reaction kettle, and the mixed solution is composed of 70% SHD30 solvent oil, 30% n-butyl acetate Ester, control the temperature at 45°C, stir for 40 minutes, the filtrate contains 8% oil, that is, 100 grams of waste silica gel decolorization sand can extract 7 grams of oil, the filtrate color is dark red, filtered and dried, and the regeneration is completed.

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Abstract

The invention provides a regeneration method of silica gel bleaching sand for petroleum or animal and vegetable oil refining. The method comprises steps as follows: 1, primary extraction: (1) to-be-processed waste silica gel bleaching sand is added to an extraction reaction kettle, and the extraction reaction kettle is filled with nitrogen for replacement for three times; (2) a nonpolar solvent is added to the extraction kettle, the volume ratio of the silica gel bleaching sand to the nonpolar solvent is 1:1, and the mixture is stirred at the temperature of 30-60 DEG C for 10-20 min; (3) nitrogen pressure filtration is performed after stirring, the pressure is controlled to range from 0.1 Mpa to 0.2 Mpa, and the filtrate is an enrichment liquid; 2, secondary extraction and regeneration: (1) a mixed liquid of the nonpolar solvent and n-butyl acetate to the extraction reaction kettle, and the volume ratio of the mixed liquid to the waste silica gel bleaching sand is 1:1; (2) the mixture is stirred at the temperature of 30-60 DEG C for 30-60 min and dried after filtered, and regeneration is finished. With the adoption of the method, the silica gel bleaching sand for petroleum or animal and vegetable oil refining can be treated, and the waste silica gel bleaching sand can be regenerated.

Description

technical field [0001] The invention belongs to the technical field of petroleum refining, and in particular relates to a regeneration method of silica gel decolorizing sand used for refining petroleum or animal and vegetable oils. Background technique: [0002] In the processing and production of petroleum or animals and plants, in order to obtain ideal components, after pre-treatment, use silica gel decolorizing sand for subsequent supplementary refining, the purpose is to remove residual non-ideal components and improve product quality. Silica gel decolorizing sand loses activity after reaching saturation. While adsorbing non-ideal components, silica gel decolorizing sand also adsorbs about 35% of ideal components. If it is not treated, this is very detrimental to environmental protection and less oil consumption. At present, there are mainly five regeneration methods of waste silica gel decolorizing sand: one is the high-pressure pressing method, which contains 10% oil ...

Claims

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Application Information

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IPC IPC(8): B01J20/34B01J20/10
CPCB01J20/103B01J20/3475B01J20/3491B01J2220/42B01J2220/4806
Inventor 郭钢福
Owner 烟台神洲能源科技有限公司
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