Biological-polysaccharide-based decoloring flocculation agent and preparation method thereof

A technology of decolorizing flocculant and biological polysaccharide, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc. It can solve the problems that the molecular weight and structural properties are difficult to meet the actual needs, and achieve good social and economic benefits, no secondary pollution, and a wide market foreground effect

Active Publication Date: 2016-03-02
威海汉邦生物环保科技股份有限公司
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when these materials are used, their molecular weight and

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Biological-polysaccharide-based decoloring flocculation agent and preparation method thereof
  • Biological-polysaccharide-based decoloring flocculation agent and preparation method thereof
  • Biological-polysaccharide-based decoloring flocculation agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example 1

[0030] Prepare the dicyandiamide-formaldehyde polycondensate solution containing carbon-carbon double bonds at the ends: In a four-necked flask equipped with an electric stirrer, a thermometer, and a reflux condenser, sequentially add 63g dicyandiamide, 11.25g urea, and 53.25g acrylamide , 40.13g ammonium chloride, 81.08g 37% formaldehyde solution, the temperature of the water bath is controlled at 35-45℃, start stirring, add 11.25g ethylenediamine after completely dissolved, the reaction system begins to exothermic, stop heating, wait for the temperature of the reaction system When the temperature drops to 48°C, 40.54g of 37% formaldehyde solution is slowly added dropwise, then the temperature is raised to 66-68°C, the temperature is kept for 2h, the product is taken out and cooled.

[0031] Dilute the above product into a 50% aqueous solution, take 50g of the solution into a 500ml three-necked flask, and then add 170g of a 15% mass concentration of biopolysacch...

Example Embodiment

[0032] Example 2

[0033] Prepare the dicyandiamide-formaldehyde polycondensate solution containing carbon-carbon double bonds at the end: In a four-necked flask equipped with an electric stirrer, a thermometer, and a reflux condenser, add 69g dicyandiamide, 12.33g urea, and 58.32g acrylamide in sequence , 26.39g ammonium chloride, 100g 37% formaldehyde solution, the temperature of the water bath is controlled at 45-50 ℃, start stirring, when completely dissolved, add 12.33g ethylenediamine, the reaction system begins to exothermic, stop heating, wait until the temperature of the reaction system drops When it reaches 50°C, 66.67g of formaldehyde solution with a concentration of 37% is slowly added dropwise, and then the temperature is raised to 66-68°C, kept for 2h, taken out, and cooled to obtain the product.

[0034] Dilute the above product into a 50% aqueous solution, take 60g of the solution into a 500ml three-necked flask, and then add 100g of the biopolysaccharide solution w...

Example Embodiment

[0035] Example 3

[0036] Prepare the dicyandiamide-formaldehyde polycondensate solution containing carbon-carbon double bonds at the ends: In a four-necked flask equipped with an electric stirrer, a thermometer, and a reflux condenser, add 123.34g dicyandiamide, 15.42g urea, and 104.3g propylene. Amide, 1.47mol HCl, 100g 37% formaldehyde solution, the temperature of the water bath is controlled at 35-45℃, start stirring, add 15.42g ethylenediamine after completely dissolved, the reaction system begins to exothermic, stop heating, wait until the temperature of the reaction system drops When it reaches 48°C, 66.67g of formaldehyde solution with a concentration of 37% is slowly added dropwise, and then the temperature is raised to 66-68°C, kept for 2h, taken out, and cooled to obtain the product.

[0037] Dilute the above product into a 50% aqueous solution, add 20g of the solution into a 500ml three-necked flask, then add 125g of a biopolysaccharide solution with a mass concentratio...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The present invention relates to a biological-polysaccharide-based decoloring flocculation agent and a preparation method thereof, and a large-scale produced non-toxic and degradable biological polysaccharide with the ultra-high molecular weight of 2 to 30 million is used as a basic skeleton for grafting and copolymerizing with a dicyandiamide-formaldehyde cationic polycondensate with a terminal carbon-carbon double bond to prepare the ultra-high molecular weight biological-polysaccharide-based decoloring flocculation agent with both decoloring and flocculation functions. The product is suitable for processing printing and dyeing wastewater large in changes in water quality, has good acid and heat resistant properties, and can make the CODcr removal rate in the water more than 80%, and the decolorization rate more than 93%. Compared with acrylamide and natural high polymer material flocculation agents, the biological-polysaccharide-based decoloring flocculation agent has more extensive market prospects and good social and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of polysaccharide biological flocculant modification technology, in particular to a biological polysaccharide-based decolorizing flocculant and a preparation method thereof. Background technique [0002] At present, dicyandiamide-formaldehyde decolorizing flocculants and cationic polyacrylamide decolorizing flocculants are mostly used in the treatment of printing and dyeing wastewater. The formed flocs are small and the sedimentation speed is slow, while the latter is just the opposite of the former, with good flocculation performance but poor decolorization performance. [0003] In order to achieve the purpose of decolorization and flocculation at the same time, the prior art combines polyacrylamide flocculant with dicyandiamide-formaldehyde decolorant to prepare a new type of decolorizing flocculant. For example, patent CN103304744A reports a two-phase decolorization Preparation process of flocculant emul...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C02F1/56C08G81/00
Inventor 庄茅胡阳倪小朋谭伟龙王晓东管涛陈亚红
Owner 威海汉邦生物环保科技股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap