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Preparation method of starch zeolite molecular sieve flocculating agent

A technology of zeolite molecular sieve and flocculant, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc., to achieve the effect of excellent performance and good application prospects

Inactive Publication Date: 2014-06-18
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report on the use of zeolite molecular sieve and starch adsorption or grafting

Method used

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  • Preparation method of starch zeolite molecular sieve flocculating agent
  • Preparation method of starch zeolite molecular sieve flocculating agent
  • Preparation method of starch zeolite molecular sieve flocculating agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Weigh 2.0 grams of tapioca starch into a 500mL beaker, add distilled water and stir to make a paste, then add boiling water while stirring, and finally heat to boiling, after cooling, centrifuge at 4500 rpm for 10 minutes, and take the supernatant solution to obtain tapioca starch solution.

[0025] (2) Put 30.0 g of hematilite powder and 90 ml of HCl solution with a concentration of 15% by mass in a 250 ml three-neck flask, and stir it electrically for 2 hours at 90°C, filter, and wash until Cl-free - , dried into acidified zeolite.

[0026] (3) Mix 8.0 grams of NaOH and 4.0 grams of NaAlO 2 Mix and add 192 ml of water to prepare a solution, add it to a three-necked bottle, then add 4.0 g of the acidified zeolite obtained in step (2), stir magnetically, and crystallize at a temperature of 90°C and for a crystallization time of 6 hours. The product is filtered, washed, After drying, A-type zeolite molecular sieves (Na 2 O·Al 2 o 3 2SiO2 2 4.5H 2 O).

[0027]...

Embodiment 2

[0033] (1) Weigh 5.0 grams of tapioca starch into a 500mL beaker, add distilled water and stir to make a paste, then add boiling water while stirring, and finally heat to boiling, after cooling, centrifuge at 4500 rpm for 10 minutes, and take the supernatant solution to obtain tapioca starch solution.

[0034] (2) Put 40.0 g of hematilite powder and 120 ml of HCl solution with a concentration of 15% by mass in a 250 mL three-necked flask, and stir it electrically for 1 hour at 80°C, filter, and wash until there is no Cl - , dried into acidified zeolite.

[0035] (3) Mix 10.0 g NaOH and 5.0 g NaAlO 2 Mix and add 240 ml of water to prepare a solution, add it to a three-necked bottle, then add 5.0 g of the acidified zeolite obtained in step (2), stir magnetically, and crystallize at a temperature of 100°C and a crystallization time of 7 hours. The product is filtered, washed, After drying, A-type zeolite molecular sieves (Na 2 O·Al 2 o 3 2SiO2 2 4.5H 2 O).

[0036] (4) Ta...

Embodiment 3

[0038] (1) Weigh 2.0 grams of tapioca starch into a 500mL beaker, add distilled water and stir to make a paste, then add boiling water while stirring, and finally heat to boiling, after cooling, centrifuge at 4500 rpm for 10 minutes, and take the supernatant solution to obtain tapioca starch solution.

[0039] (2) Put 30.0 g of hematilite powder and 90 ml of HCl solution with a concentration of 15% by mass in a 250 ml three-neck flask, and stir it electrically for 2 hours at 90°C, filter, and wash until Cl-free - , dried into acidified zeolite.

[0040] (3) Mix 8.0 grams of NaOH and 4.0 grams of NaAlO 2 Mix and add 192 ml of water to prepare a solution, add it to a three-necked bottle, then add 4.0 g of the acidified zeolite obtained in step (2), stir magnetically, and crystallize at a temperature of 90°C and for a crystallization time of 6 hours. The product is filtered, washed, After drying, A-type zeolite molecular sieves (Na 2 O·Al 2 o 3 2SiO2 2 4.5H 2 O).

[0041]...

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Abstract

The invention discloses a preparation method of a starch zeolite molecular sieve flocculating agent. The preparation method comprises the steps of (1) adding distilled water into 2.0-10.0g of cassava starch, heating until boiling, and centrifuging at the rotating speed of 4500r / min for 10min after cooling to obtain a cassava starch solution; (2) stirring 30.0-50.0g of epidesmine powder and 90-150ml of HCl solution with the mass percent concentration of 15% at the temperature of 70-90 DEG C for 1-3h, filtering, washing until no Cl<-> exists, and drying to form acidized zeolite; (3) mixing 6.0-10.0g of NaOH and 3.0-5.0g of NaAlO2, adding 144-240ml of water, adding 3.0-5.0g of acidized zeolite, stirring, crystallizing, filtering, washing and drying to obtain a zeolite A molecular sieve; (4) keeping 20mL of cassava starch solution and 2.5-3.5g of zeolite A molecular sieve at the temperature of 10-30 DEG C for 1-2h, centrifuging at the rotating speed of 4500r / min for 10min, and settling. The starch zeolite molecular sieve flocculating agent prepared by using the preparation method is favorable in performance, is nontoxic and harmless and has a broad spectrum effect; when the flocculating agent is used for purifying water, the water purification rate is up to 97.41%.

Description

technical field [0001] The invention belongs to the technical field of biological environmental protection, and relates to a preparation method of a starch zeolite molecular sieve flocculant. Background technique [0002] Inorganic flocculants, synthetic organic polymer flocculants and natural polymer flocculants are the three mainstream flocculants in the field of water treatment. However, after the inorganic flocculants are dissolved in water, the re-pollution caused by ion residues and the high cost of synthetic polymer flocculants and carcinogenicity limit the application of these two types of flocculants. Starch is a renewable natural polymer with low price, wide sources and non-toxic. It is one of the important development directions of natural polymer flocculants to introduce branched chains with more active groups on the main chain of starch by appropriate methods, which not only exerts its own advantages, but also makes it meet the requirements of flocculation. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56C02F1/52C08B31/00
Inventor 王秀丽马肖李子院陈南春朱中升张小虎
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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