Purification method of kieselguhr filler

A diatomaceous earth and drying technology, applied in chemical instruments and methods, silicon compounds, silicon oxide, etc., can solve the problems that have not been reported, cannot effectively remove impurities, and have poor effects

Inactive Publication Date: 2006-11-01
胡小钟 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing methods generally use acid boiling to remove impurities, but this method is very ineffective and cannot effectively remove impurities
Other relevant diatomite purification methods have not been reported in domestic and foreign literature

Method used

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  • Purification method of kieselguhr filler
  • Purification method of kieselguhr filler
  • Purification method of kieselguhr filler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] The method of the present invention is specifically described below in conjunction with embodiment:

[0026] (1), the diatomite filler is washed with sulfuric acid or hydrochloric acid, and washed with water after washing;

[0027] (2), after drying above-mentioned diatomite filler, wash with ethanol or acetone;

[0028] (3), volatilize and dry the diatomite filler after washing with ethanol or acetone;

[0029] (4) Burn the dried diatomite filler, the burning temperature is 750°C, and the burning time is 24 hours continuously.

[0030] (5) After burning, use a water bath to cool, and the cooling water temperature is below 10°C;

[0031] (6), carry out vacuum packing after removing powder with 100 mesh filter sieves.

[0032] The burning temperature is 550°C, 600°C, 700°C, 750°C, 800°C, and 850°C, and the burning time is 12 hours, 24 hours, 36 hours, and 48 hours. The test results prove that when the temperature is 550°C, 600°C, 700°C, and the time is shorter than 2...

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Abstract

The invention relates to a purification method of diatomite filler. It is to wash the diatomite filler with acid and organic solvent, and then burn it continuously for 12-48 hours at 550°C-850°C. It solves the problem that the existing diatomite filler cannot be reused due to impurities after use. The method of the invention can effectively remove the inorganic and organic impurities in the diatomite filler, so that the diatomite filler can generally be reused four times, greatly saving the use cost.

Description

technical field [0001] The invention relates to a method for purifying fillers, in particular to a method for purifying diatomite fillers. Background technique [0002] Matrix solid-phase dispersion technology is a commonly used sample pretreatment method in food safety analysis (pesticide residues, veterinary drug residues, and antibiotic residues in food). Diatomaceous earth is a key material for realizing this technology. Moisture and various interfering substances to separate the interfering substances from the target compounds (pesticide residues in food, veterinary drug residues, antibiotic residues). Because diatomaceous earth absorbs water and interfering substances, if it is not purified, it will lose its use value. Today, diatomaceous earth used in matrix solid phase dispersion technology is usually discarded after use and is generally considered a "single-use" material. Since the price of diatomite is relatively expensive, 5,000 yuan per kilogram, and most of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/113C01B33/36B01J20/14
Inventor 胡小钟余建新李晶黄鑫
Owner 胡小钟
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