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High-strength spherical glucomannan tannin composite absorption material and preparation method thereof

A technology for polysaccharide tannins and adsorption materials, which is applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve problems such as complex process and secondary pollution, and achieve simple process, less pollution and cost low effect

Inactive Publication Date: 2012-10-03
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional method is mature and stable, and can be industrially applied to the treatment of a large amount of heavy metal wastewater, but its main disadvantage is that the process is relatively complicated and prone to secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: Swell 20 parts of glucomannan in a 50% methanol dispersant with 5 parts of sodium hydroxide dissolved in a proportion by weight, control the temperature at 20°C, carry out a deacetylation reaction for 3 hours, filter, wash away the dispersant and excess base, dried at 50°C for 12 hours to obtain deacetylglucomannan; disperse 20 parts of deacetylglucomannan in 150 parts of aqueous solution in which 20 parts of tannin was dissolved, perform adsorption reaction for 3 hours, filter and wash , to obtain deacetylglucomannan adsorption tannin material; disperse 20 parts of deacetylglucomannan adsorption tannin material in 200 parts of petroleum ether, add 5 parts of sodium hydroxide and 10 parts of epichlorohydrin, Control the temperature at 35°C, carry out cross-linking reaction under mechanical stirring for 24 hours, filter and wash, and dry at 50°C for 12 hours to obtain a high-strength spherical glucomannan tannin composite adsorption material.

Embodiment 2

[0022] Example 2: Swell 50 parts of glucomannan in a dispersant of 50% butanol and 50% methyl ethyl ketone dissolved in 35 parts of calcium hydroxide according to the proportion by weight, control the temperature at 30°C, carry out deacetylation reaction for 2 hours, and filter , wash away the dispersant and excess alkali, dry at a temperature of 55°C for 10 hours to obtain deacetylglucomannan; disperse 50 parts of deacetylglucomannan in 200 parts of aqueous solution in which 50 parts of tannins are dissolved, Adsorption reaction for 10 hours, filtered and washed to obtain deacetylglucomannan adsorption tannin material; 50 parts of deacetylglucomannan adsorption tannin material were dispersed in 200 parts of 50% butanol plus 50% butanone Add 35 parts of calcium hydroxide and 50 parts of formaldehyde, control the temperature at 90°C, carry out the crosslinking reaction under mechanical stirring for 4 hours, filter and wash, and dry at 80°C for 10 hours to obtain high-strength ...

Embodiment 3

[0023] Example 3: Swell 30 parts of glucomannan in a dispersant of 30% acetone and 40% chloroform with 15 parts of potassium hydroxide dissolved in a proportion by weight, control the temperature at 40°C, carry out deacetylation reaction for 1.5 hours, filter, wash Remove the dispersant and excess alkali, dry at 60°C for 9 hours to obtain deacetylglucomannan; disperse 30 parts of deacetylglucomannan in 180 parts of aqueous solution in which 30 parts of tannin is dissolved, and the adsorption reaction 9 hours, filter and wash to obtain deacetylglucomannan adsorption tannin material; disperse 30 parts of deacetylglucomannan adsorption tannin material in 150 parts of 30% acetone plus 40% chloroform, add 15 parts of hydrogen Potassium oxide and 30 parts of phosphorus oxychloride, temperature controlled at 40°C, cross-linking reaction under mechanical stirring for 18 hours, filtered and washed, dried at 70°C for 10 hours, and high-strength spherical glucomannan tannin composite ad...

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Abstract

The invention discloses high-strength spherical glucomannan tannin composite absorption material and a preparation method of the composite absorption material. The preparation method comprises the following steps: swelling glucomannan into alkaline mixed solvents of dispersing agents, controlling the temperature within the scope of 20-50 DEG C, carrying out deacetylation reaction for 1-3 hours, filtering and washing the dispersing agent and the excessive alkaline and drying for 5-12 hours at the temperature of 50-70 DEG C to obtain deacetyled glucomannan; dispersing the deacetyled glucomannanin tannin-containing aqueous solution, carrying out absorption reaction for 3-12 hours and filtering and washing to obtain deacetyled glucomannan tannin absorption material; dispersing the deacetyledglucomannan tannin absorption material into the 20-100 percent of dispersing agents, adding alkaline and the cross-linking agent, carrying out cross-linking reaction for 3-24 hours under the mechanical agitation, filtering and washing and drying for 5-12 hours at the temperature of 50-90 DEG C to prepare the high-strength spherical glucomannan tannin composite absorption material.

Description

technical field [0001] The invention relates to a high-strength spherical glucomannan-tannin composite adsorption material and a preparation method thereof. Background technique [0002] Heavy metal wastewater mainly comes from mining, mineral processing, smelting, electroplating, chemical industry, machinery, tanning and nuclear industries. The heavy metal-containing wastewater produced by these industries not only poses a threat to aquatic organisms after being discharged into natural water bodies, but may also be continuously enriched through sedimentation, adsorption and food chains, destroying the ecological environment, and ultimately endangering human health. [0003] With the advancement of science and technology and the strengthening of people's awareness of environmental protection, heavy metal wastewater treatment technology has been developed by leaps and bounds. According to the order of time, heavy metal wastewater treatment technologies can be divided into tw...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F1/62C02F101/20
Inventor 罗学刚刘锋林晓艳
Owner SOUTHWEAT UNIV OF SCI & TECH
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