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A kind of preparation method of cauliflower-shaped calcium sulfite particles

A calcium sulfite, cauliflower-like technology, applied in the direction of calcium/strontium/barium sulfite, etc., to achieve the effects of simple operation, great application value, and environmental protection of raw materials

Active Publication Date: 2017-11-28
GUANGXI UNIVERSITY OF TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports at home and abroad on the application of calcium sulfite with different shapes in the purification of sugar juice.

Method used

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  • A kind of preparation method of cauliflower-shaped calcium sulfite particles
  • A kind of preparation method of cauliflower-shaped calcium sulfite particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: In 100ml beaker, prepare the calcium chloride solution of 0.1mol / L and the sodium sulfite solution of 0.1mol / L with water respectively, calcium chloride solution and sodium sulfite solution are filtered with 0.45 μm filter membrane respectively, remove undissolved Impurities, collect the filtrate, then dissolve 0.038g of citric acid in 100ml of calcium chloride solution, and adjust the pH of the calcium chloride solution to 10 with 0.5mol / L sodium hydroxide solution to fully deprotonate it. Then sodium sulfite solution was slowly added to an equal volume of calcium chloride solution, and stirred slowly. Finally, the generated calcium sulfite precipitate was filtered, centrifuged, washed alternately with double distilled water and absolute ethanol three times, and fully dried at 60°C. The particle size distribution is 5~10μm, uniform distribution, cauliflower-like calcium sulfite particles.

Embodiment 2

[0014] Embodiment 2: prepare respectively the calcium chloride aqueous solution of 0.2mol / L and the sodium sulfite aqueous solution of 0.2mol / L in the 100ml beaker, filter with 0.45 μm filter membrane then, remove undissolved impurity, then get the lemon of 0.076g Dissolve the acid in 100ml of calcium chloride solution, and adjust the pH of the calcium chloride solution to 10 with 0.5mol / L sodium hydroxide solution to fully deprotonate it. Then sodium sulfite solution was slowly added to an equal volume of calcium chloride solution, and stirred slowly. Finally, the generated calcium sulfite precipitate was filtered, centrifuged, washed alternately with double distilled water and absolute ethanol three times, and fully dried at 60°C. The particle size distribution is 5~10μm, uniform distribution, cauliflower-like calcium sulfite particles.

Embodiment 3

[0015] Embodiment 3: prepare the calcium chloride solution of 0.3mol / L and the sodium sulfite solution of 0.3mol / L with water respectively in the 100ml beaker, filter with 0.45 μm filter membrane then, remove undissolved impurity, then get 0.11g of Dissolve citric acid in 100ml of calcium chloride solution, and adjust the pH of the calcium chloride solution to 10 with 0.5mol / L sodium hydroxide solution to fully deprotonate it. Then sodium sulfite solution was slowly added to an equal volume of calcium chloride solution, and stirred slowly. Finally, the generated calcium sulfite precipitate was filtered, centrifuged, washed alternately with double distilled water and absolute ethanol three times, and fully dried at 60°C. The particle size distribution is 5~10μm, uniform distribution, cauliflower-like calcium sulfite particles.

[0016] The water used to prepare the solutions in the various embodiments of the present invention is double distilled water.

[0017] In each embodi...

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Abstract

The invention relates to a preparation method of cauliflower-shaped calcium sulfite particles. Calcium chloride and sodium sulfite are used as raw materials to prepare a certain concentration of calcium chloride solution and sodium sulfite solution with water, and filter with a filter membrane and collect the filtrate. A certain amount of Add citric acid into the calcium chloride solution and adjust the pH=10 with sodium hydroxide solution, slowly add the sodium sulfite solution into the calcium chloride solution, stir while adding, and finally filter and centrifuge the generated calcium sulfite precipitate, and use two After alternately washing with sub-distilled water and water and ethanol, dry at 60°C to obtain cauliflower-like calcium sulfite. The product obtained by the invention has cauliflower-like appearance, 5-10 μm particle size, uniform distribution, simple preparation process, low cost, safe and non-toxic raw materials, and has great application value in the field of cleaning sugar cane juice.

Description

technical field [0001] The invention relates to a preparation method of cauliflower-like calcium sulfite particles, belonging to the field of inorganic chemical industry. Background technique [0002] Calcium sulfite is a white crystalline powder that contains 0.5 molecules of crystal water (CaSO 3 0.5H 2 O), heating at 360-390°C will lose crystallization water, and can be decomposed into calcium oxide and sulfur dioxide at 650°C, insoluble in water, used for calcium-plastic materials, cellulose products bleaching and dechlorination agents, food preservatives and fermentation Bactericides are widely used, especially in the sugar industry. It can be made by passing sulfur dioxide into milk of lime or reacting calcium chloride and sodium sulfite. [0003] The application of nascent calcium sulfite in the sugar industry is mainly reflected in the cleaning process of sugar cane juice. Calcium sulfite particles are formed by the reaction of lime and sulfur dioxide or calcium ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F11/48
CPCC01F11/48C01P2004/03C01P2004/30C01P2004/50C01P2004/61
Inventor 李利军向富友程昊李子日黄文艺李彦青
Owner GUANGXI UNIVERSITY OF TECHNOLOGY
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