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Formula and preparation method of cationic polymer

A cationic polymer and formula technology, which is applied in textile industry wastewater treatment, flocculation/sedimentation water/sewage treatment, etc., can solve the problems of high price, achieve low raw material cost, convenient storage and transportation, and excellent flocculation and decolorization effect Effect

Inactive Publication Date: 2010-09-01
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the performance of the above products is excellent, because the cationic raw materials used are all fine chemical products, the price is very expensive

Method used

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  • Formula and preparation method of cationic polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Example 1: Preparation of Cationic Polymers Using Formaldehyde, Dimethylamine, Diethylenetriamine and Acetone

[0066] The synthesis process is mainly divided into two steps. The first step is to add 10ml of water, 20ml of 37% formaldehyde aqueous solution, 11ml of acetone and 16ml of 33% dimethylamine aqueous solution to the three-necked flask, adjust the pH to about 2.0 with 13ml of 36% hydrochloric acid, and then react at 5°C for about 2 hours; then add the second A batch of 12ml of 37% formaldehyde solution was heated to 30°C for 30 minutes, 4g of sodium hydroxide was added to adjust the pH to 10, 2ml of diethylenetriamine was added, and the temperature was raised to 80°C to continue the reaction for 3 hours. The product was a reddish-brown liquid, which was miscible with water; Low molecular components such as unreacted monomers and inorganic salts are removed, and the purified product aqueous solution is odorless and tasteless. The solid content of the product a...

Embodiment 2

[0069] Example 2 : Preparation of cationic polymers using formaldehyde, acetone, ethylenediamine and triethylenetetramine

[0070] Add 20ml of water to the three-necked flask, then add 12ml of 37% formaldehyde solution, 10ml of acetone and 7.2ml of ethylenediamine, and adjust the pH to about 3.0 with 10ml of 36% concentrated hydrochloric acid, then react at room temperature for about 2 hours at 25°C; add the second batch of 10ml Formaldehyde, continue to react for 20 minutes, then add 3.5g of sodium hydroxide to adjust the pH to about 10, add 1.5ml of triethylenetetramine, raise the temperature to 60°C and continue to react for 3h, to end the reaction. The product is a reddish-brown solution. After dialysis and purification, the solid content of the product is 20.7%, and the cationic degree is 3.8mmol / g.

Embodiment 3

[0073] Example 3 : Preparation of cationic polymer by formaldehyde, acetone and diethylenetriamine

[0074] Add 40ml of water to the three-necked flask, then add 12ml of 37% formaldehyde solution, 11ml of acetone and 7.7ml of diethylenetriamine, and adjust the pH to 2.0 with 14ml of 36% concentrated hydrochloric acid, then react at 5°C for about 2.5h; then add the second batch 12ml of formaldehyde, continue to react for 15 minutes, add 2.2g of sodium hydroxide to adjust the pH to about 11, raise the temperature to 80°C for 2 hours, and end the reaction to form a reddish-brown liquid. After dialysis and purification, the product has a solid content of 24% and a cationic degree of 4.3mmol. / g.

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Abstract

The invention provides a formula and a preparation method of a cationic polymer. The raw material formula of the cationic polymer comprises the following components in part by weight: water 5-50, acetone 3-25, amine 5-30, aldehyde 5-40, alkaline regulator 3-12 and acidic regulator 5-20. In the method, a water soluble cationic polymer is prepared from aldehyde, acetone and amine by a nucleophilic addition reaction, an aldol condensation reaction and a Michael addition reaction in the presence of acid and alkali catalysts in turn and by a two-step feeding process. The method has the advantages that: the raw material cost is low, the synthesis process is simple and easy to implement; the preparation conditions are mild and safe; and the obtained product has high cation content and has high decolorizing and flocculating effects on anionic dye waste water.

Description

technical field [0001] The invention belongs to the field of surfactant preparation, and more specifically relates to a cationic polymer formulation and a preparation method thereof. Background technique [0002] Cationic polymer is an important functional polymer material, which has cationic properties in its macromolecular structure, so it has been widely used in many fields. Common application areas of cationic polymers include: as antistatic agent and bactericide in textile dyeing and finishing industry; as paper strengthening agent in paper industry; as flocculant in sewage treatment; as rust inhibitor and surface modification in materials science Agents, etc. [0003] Common cationic polymers mainly include two categories: monomer-polymerized cationic polymers and synthetic polymer-modified cationic polymers. Among them, the representative products that have been industrially produced are: 1) cationic polyacrylamide and its derivatives, which are mainly prepared by f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G12/00C02F1/56C02F103/30
Inventor 程贤甦方润
Owner FUZHOU UNIV
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