Active elementary selenium and its preparation method and use

A technology of elemental selenium and activity, applied in the direction of chemical instruments and methods, applications, selenium/tellurium compounds, etc., can solve problems such as narrow safety limits, achieve narrow particle size distribution, simple implementation method, and reduce the effect of dripping water loss

Inactive Publication Date: 2007-02-14
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the safe margin for selenium between optimal and toxic concentrations is very narrow

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) Place a commercially available 201×7 (717#) strongly basic type I anion exchange resin (this product is equivalent to Amberlite IRA-400 in the United States, Lewatit M500 in West Germany, and Diaion SA-10A in Japan) in 0.5 mol of 1 times the volume of the resin Soak in / L hydrochloric acid solution for 2 hours, drain the acid solution, rinse with water until neutral, then soak in 0.5mol / L sodium hydroxide solution that is 1 times the volume of the resin for 3 hours, drain the alkali solution and rinse with water until neutral;

[0020] 2) the resin of step 1) is packed in the exchange column, and the Na containing selenium is the anion exchange resin weight 0.1%. 2 SeO 3 , configured as a 0.1mol / L selenium salt aqueous solution, passed through the exchange column at a flow rate of 1mL / min, after the exchange was completed, then added 0.1mol / L potassium borohydride whose molar ratio was 2 times that of the selenium salt, and reacted at room temperature for 3 hours. W...

Embodiment 2

[0023] 1) Soak the commercially available D311 macroporous acrylic weak base anion exchange resin (this product is equivalent to the U.S.: Amberlite IRA-68; Germany: AP-49D318) in a 2 mol / L hydrochloric acid solution twice the volume of the resin for 5 hours, Drain the acid solution and rinse with water until neutral, then soak in 2mol / L sodium hydroxide solution twice the volume of the resin for 6 hours, drain the lye and rinse with water until neutral;

[0024] 2) the resin of step 1) is packed in the exchange column, and the K containing selenium is 1.0% of anion exchange resin weight 2 SeO 3 , configured as 1mol / L K 2 SeO 3 The aqueous solution passes through the exchange column at a flow rate of 10 mL / min. After the exchange is completed, 1 mol / L vitamin C with a molar ratio of 10 times the selenium salt is added, reacted at room temperature for 10 hours, and washed 5 times with water;

[0025] 3) drying the anion exchange resin loaded with elemental selenium obtained ...

Embodiment 3

[0027] 1) Place the commercially available D201 macroporous basic type I anion exchange resin (this product is equivalent to the United States: AmberliteIRA-900, West Germany: Lewatit MP-500, Japan: Diaion308) in 1.5 times the resin volume of 1mol / L hydrochloric acid Soak in the solution for 3 hours, drain the acid solution, rinse with water until neutral, then soak in 1mol / L sodium hydroxide solution 1.5 times the volume of the resin for 5 hours, drain the lye and rinse with water until neutral;

[0028] 2) the resin of step 1) is packed in the exchange column, and the Na containing selenium is the anion exchange resin weight 0.8%.2 SeO 4 , configured as 0.5mol / L Na 2 SeO 4 The aqueous solution passes through the exchange column at a flow rate of 5mL / min. After the exchange is completed, add a molar ratio of Na 2 SeO 4 5 times Na 2 S 2 o 3 , reacted at room temperature for 8 hours, washed 4 times with water;

[0029] 3) drying the anion exchange resin loaded with eleme...

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PUM

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Abstract

The present invention discloses one kind of active simple substance selenium product and its preparation process and use. The active simple substance selenium product is one kind of anion exchange resin with supported simple substance selenium in 0.1-1.0 wt%. During the preparation process in anion exchange resin as micro reactor, selenium salt is reduced with reductant into simple substance selenium. The prepared simple substance selenium product has small grain, narrow grain size distribution, homogeneous and stable dispersion, and is suitable for industrial production. In addition, the anion exchange resin is also one release controlling carrier with excellent selenium release controlling effect and can raise the simple substance selenium absorbing and utilizing rate greatly. With the features of low toxicity and high efficiency, the active simple substance selenium product may be used as selenium replenishing feed additive and may be used in preparing selenium replenisher for human body.

Description

technical field [0001] The invention relates to an active elemental selenium, its preparation method and application, in particular to an anion exchange resin loaded with elemental selenium, its preparation method and application. Background technique [0002] Selenium is an essential trace element for animals, and plays an important role in the growth and development, immune function and anti-oxidation of animals. Su Qi et al. (1985) showed that more than two-thirds of my country's areas belong to selenium-deficient areas, and the average selenium content in feed in these areas is lower than 0.05mg / kg, of which selenium Serious selenium deficiency areas with content less than 0.02mg / kg accounted for 29%. Supplementing dietary selenium is now a routine measure to prevent selenium deficiency in my country's aquaculture industry. However, the safe margin of selenium between the optimal concentration and the toxic concentration is very narrow. In the past forty years, the sea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B19/00A23K1/175A61K33/04A23K20/20
Inventor 胡彩虹徐勇夏枚生姚志通赵文艳张红梅
Owner ZHEJIANG UNIV
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