Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Production method of macromolecular chelating agent for treating heavy metal ions in wastewater

A polymer chelating agent, heavy metal ion technology, applied in chemical instruments and methods, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. The problem of high cost is to achieve the effect of good flocculation and sedimentation, lower reaction temperature and lower energy consumption.

Active Publication Date: 2017-09-22
TAISHAN MEDICAL UNIV
View PDF3 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0028] The present invention solves the problems of unreasonable raw material proportioning, high reaction temperature, long reaction time, high product cost, increased yield but increased cost and other problems existing in the existing dithiocarbamic acid polyethyleneimine. Proportion, reaction temperature and time, etc. are studied in depth, and the existing process is optimized to provide a production method of a polymer chelating agent that can be used to remove various heavy metal ions in wastewater, so as to achieve the following invention objectives:

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
  • Production method of macromolecular chelating agent for treating heavy metal ions in wastewater
  • Production method of macromolecular chelating agent for treating heavy metal ions in wastewater
  • Production method of macromolecular chelating agent for treating heavy metal ions in wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Embodiment 1 A kind of production method that can be used for removing the polymer chelating agent of multiple heavy metal ions in waste water

[0058] The synthesis reaction of the polymer chelating agent is carried out in a 1500L enamel kettle.

[0059] The polymer chelating agent is polyethylenimine dithiocarbamate.

[0060] (1) Carbon disulfide high tank feeding

[0061] Use compressed air to press 98.5kg (1296mol) carbon disulfide from the storage tank to the carbon disulfide high level tank, and keep the height of the upper water layer of the carbon disulfide high level tank at 10-15mm.

[0062] (2) Synthetic kettle feeding

[0063] 630kg (35000mol) of deionized water, 190kg of industrial NaOH (the molar number of NaOH is 1425mol) solution with a mass concentration of 30% (the molar number of NaOH is 1425mol) was sequentially pumped into the synthesis kettle by vacuum, and 0.08kg of 4-dimethylaminopyridine (DMAP), 0.12kg1 -(3-Dimethylaminopropyl)-3-ethylcarbodi...

Embodiment 2

[0081] Embodiment 2 A kind of production method that can be used for removing the polymer chelating agent of multiple heavy metal ions in waste water

[0082] The synthesis reaction of the polymer chelating agent is carried out in a 1500L enamel kettle.

[0083] The polymer chelating agent is polyethylenimine dithiocarbamate.

[0084] (1) Carbon disulfide high tank feeding

[0085] Use compressed air to press 99.5kg (1309mol) carbon disulfide from the storage tank to the carbon disulfide header tank, and keep the height of the water layer at the upper part of the carbon disulfide header tank at 10-15mm.

[0086] (2) Synthetic kettle feeding

[0087] 640kg (35555mol) of deionized water, 200kg of industrial NaOH with a mass concentration of 30% (the molar number of NaOH is 1500mol) was sequentially pumped into the synthesis kettle by vacuum, and 0.10kg of 4-dimethylaminopyridine (DMAP), 0.14kg1 -(3-Dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC), start stirring, ...

Embodiment 3

[0103] Embodiment 3 A kind of production method that can be used for removing the polymer chelating agent of multiple heavy metal ions in waste water

[0104] The synthesis reaction of the polymer chelating agent is carried out in a 1500L enamel kettle.

[0105] The polymer chelating agent is polyethylenimine dithiocarbamate.

[0106] (1) Carbon disulfide high tank feeding

[0107] Use compressed air to press 100kg (1316mol) carbon disulfide from the storage tank to the carbon disulfide header tank, and keep the height of the water layer at the upper part of the carbon disulfide header tank at 10-15mm.

[0108] (2) Synthetic kettle feeding

[0109] 650kg (36111mol) of deionized water, 210kg of industrial NaOH with a mass concentration of 30% (the molar number of NaOH is 1575mol) were sequentially pumped into the synthesis kettle by vacuum, and 0.12kg of 4-dimethylaminopyridine (DMAP), 0.16kg1 -(3-Dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC), start stirring, ...

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

PropertyMeasurementUnit
viscosityaaaaaaaaaa
densityaaaaaaaaaa
removal efficiencyaaaaaaaaaa
Login to View More

Abstract

The invention provides a production method of a macromolecular chelating agent for treating heavy metal ions in wastewater. The production method comprises the steps of adding a material into a carbon disulfide overhead tank, adding a material into a synthesis kettle, feeding chilled salt water, dropwise adding carbon disulfide and adjusting the rotating speed. In the step of adding the material into the synthesis kettle, the material ratio is that the mole ratio of polyethyleneimine to NaOH is 1 to 0.6-0.8, and the mole ratio of polyethyleneimine to deionized water is 1 to 15-26. The chelating agent synthesized through the preparation method is brownish red transparent liquid, has the density of 1.08 to 1.13 g / ml at 25 DEG C, the pH value (in 10 percent of an aqueous solution) is 10.6 to 11.4 and the viscosity of 82 to 90 mPa.s at 25 DEG C, and is good in clearing effect on the heavy metal ions in the wastewater. The preparation method further has the advantages of short reaction time, low reaction temperature, low energy consumption, reasonable raw material proportioning, full reaction and obvious reduction of side effects.

Description

[0001] The present invention is a divisional application with application number 201510614775.2, application date: September 24, 2015, and title of the invention: "a production method of a polymer chelating agent that can be used to remove various heavy metal ions in wastewater". technical field [0002] The invention relates to a production method of a polymer chelating agent which can be used for removing various heavy metal ions in waste water, and belongs to the technical field of environmental protection. Background technique [0003] In today's increasingly serious environmental problems, heavy metal pollution in industrial wastewater pollution is particularly serious. On the one hand, heavy metal wastewater comes from a wide range of sources, including mine drainage, waste rock field leaching water, ore dressing plant tailings drainage, non-ferrous metal smelter dust removal drainage, Pickling water in non-ferrous metal processing plants, washing water in electroplatin...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/04C02F1/56C02F101/20
CPCC02F1/56C02F2101/20C08G73/0206
Inventor 杨荣华杨明晖张秀玲董峻豪郭学阳
Owner TAISHAN MEDICAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com