Organic polymer flocculant and its prepn. and application in water treatment

A technology of organic polymer and flocculant, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc., to achieve ideal effect, easy storage and transportation, and simple production process

Inactive Publication Date: 2002-02-20
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, my country's research and development of organic polymer flocculants still needs to be strengthened.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Raw material and its dosage:

[0047] Ammonium dihydrogen phosphate 4.0kg

[0048] Formaldehyde 25.0kg

[0049] Dicyandiamide 9.0kg

[0050] Phosphorus trichloride 15.0kg

[0051] Additives (including NH 4 h 2 PO 4 , PVA, vinylidene urea, stearic acid) 2.0kg

[0052] Water 47.0kg

[0053] - polycondensation reaction

[0054] Slowly dissolve ammonium dihydrogen phosphate in a reactor containing formaldehyde and an appropriate amount of water, control the reaction temperature at 60°C, add dicyandiamide, and raise the reaction temperature to 90°C, and control the reaction time at 2.0 hours;

[0055] ——Hydrolysis reaction and esterification reaction

[0056] Lower the temperature of the above reaction solution to 60°C, add phosphorus trichloride dropwise, after the dropwise addition, raise the reaction temperature to 120°C, react for 4.0 hours, lower the material temperature to 80°C, and add 0.5kg NH 4 h 2 PO 4 , 0.5kg PVA, 0.5kg cyclic vinylidene urea...

Embodiment 2

[0058] Raw material and its dosage:

[0059] Ammonium dihydrogen phosphate 4.0kg

[0060] Formaldehyde 10.0kg

[0061] Acrolein 16.8kg

[0062] Dicyandiamide 19.0kg

[0063] Phosphorus trichloride 20.0kg

[0064] Additives (including NH 4 h 2 PO 4 , stearic acid) 2.2kg

[0065] Water 28.0kg

[0066] - polycondensation reaction

[0067] Slowly dissolve ammonium dihydrogen phosphate in a reactor containing formaldehyde, acrolein and an appropriate amount of water, control the reaction temperature at 50°C, add dicyandiamide, and raise the reaction temperature to 95°C, and control the reaction time at 1.5 hours .

[0068] ——Hydrolysis reaction and esterification reaction

[0069] Lower the temperature of the above reaction solution to 70°C, add phosphorus trichloride dropwise, after the dropwise addition, raise the reaction temperature to 100°C, react for 6.0 hours, lower the material temperature to 85°C, and add 1.2kg NH 4 h 2 PO 4 And 1.0kg stearic ac...

Embodiment 3

[0071] Raw material and its dosage:

[0072] Ammonium bisulfate 2.0kg

[0073] Ammonium chloride 3.0kg

[0074] Formaldehyde 20.0kg

[0075] Butyraldehyde 8.0kg

[0076] Dicyandiamide 16.0kg

[0077] Phosphorus trichloride 23.0kg

[0078] Additives (including NH 4 h 2 PO 4 , ethylene urea, stearic acid) 3.0kg

[0079] Water 25.0kg

[0080] - polycondensation reaction

[0081] Slowly dissolve ammonium bisulfate and ammonium chloride in a reactor containing formaldehyde, butyraldehyde and an appropriate amount of water, control the reaction temperature at 50°C, add dicyandiamide, and raise the reaction temperature to 60°C, the reaction time is controlled in 2.5 hours.

[0082] ——Hydrolysis reaction and esterification reaction

[0083] Lower the temperature of the above reaction solution to 50°C, add phosphorus trichloride dropwise, after the dropwise addition, raise the reaction temperature to 110°C, react for 5.0 hours, lower the material temperature...

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PUM

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Abstract

The present invention relates to preparation of organic polymer coagulant and its application in water treatment. Said method incldues condensation polymerization, inorganic ammonium salt is dissolved in a reactor containing aliphatic aldehyde and water, reaction temp. is 60-95 deg.C, reaction time is controlled at 0.5-3 hr., proceed hydrolysis and esterification, reduce the temp. of reaction liquid to 20-70 deg.C., and phosphorus trichloride, raise temp. to 90-120 deg.C, react for 2-9 hr., then reduce temp. of 45-85 deg.C, and additive, continue reaction 1-3 hr. cool to room temp. to obtain product. The invented product is ideal in waste water treatment, good in stability, non-toxic etc..

Description

technical field [0001] The invention relates to the field of chemical and chemical flocculants, in particular to an organic polymer flocculant, a preparation method thereof and an application in water treatment. Background technique [0002] Flocculants have been widely used in wastewater treatment. As far as the existing flocculants are concerned, they can be divided into two categories: inorganic flocculants and organic flocculants according to their chemical composition. Among the inorganic flocculants, inorganic polymer flocculants are dominant, such as polysulfuric ferric chloride, polyphosphoric ferric chloride, polyferric silicate, polyferric phosphate and other iron salts and polyferric aluminum chloride, polysilicon Aluminum salt flocculants such as aluminum sulfate and aluminum polyphosphate sulfate. Inorganic polymer flocculants are easy to obtain raw materials, easy to prepare, and cheap, but they are used in large amounts, settling slowly, and have a lot of sla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56C08G12/06
Inventor 刘明华叶莉
Owner FUZHOU UNIV
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