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

Sulfide heavy metal chelating agent and preparation method thereof

A heavy metal collector and sulfide technology, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problems of long synthesis route, low yield, low zinc removal rate, etc., and achieve convenient operation. , The effect of short settling time and not easy secondary pollution

Inactive Publication Date: 2012-07-04
南京正隆顺达高分子材料有限公司
View PDF2 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology describes a new compound that can trap heavy metallic elements (such as copper). These materials are useful because they work well together when combined with certain chemical reagents like calcium salt called tetraacelyltitanate. By adding this complex material into these contaminants, their properties become more effective than previously known methods.

Problems solved by technology

This technical problem addressed in this patents relates to improper handling or disposing of harmful substances like lead (PZ) due to their negative impact on human wellbeings worldwide. Current methods involve complex processes involving multiple stages, resulting in increased costs associated therewith.

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
  • Sulfide heavy metal chelating agent and preparation method thereof
  • Sulfide heavy metal chelating agent and preparation method thereof
  • Sulfide heavy metal chelating agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of sulfide heavy metal collector N 1 ,N 2 ,N 4 ,N 5 -Tetrakis(2-mercaptoethyl) 1,2,4,5-pyromelliticamide, the preparation method of which is as follows:

[0027] At 20°C, in a 150mL three-neck flask, dissolve mercaptoethylamine hydrochloride to pyromellitic anhydride at a molar ratio of 4.4, that is, dissolve 5.0 g of mercaptoethylamine hydrochloride and 2.18 g of pyromellitic anhydride in 75 mL of dimethylformaldehyde In the amide, react under stirring for 4 hours to obtain the heavy metal chelating collector N 1 ,N 2 ,N 4 ,N 5 -Tetrakis(2-mercaptoethyl) 1,2,4,5-pyromellitic tetracarboxamide (TMBTC for short), the reaction yield is 22.43%.

[0028] Infrared IR and nuclear magnetic NMR characterization results are as follows:

[0029] IR(KBr disk, cm -1 ): 3211.79 s(V N- H), 2542.12w( S-H ), 1677.28(V C=O), 1608 ss (δ in-plane bending N-H), 1417.85 m (V C=C), 1296.99ss (V C-N), 1296.99 m (V C-N), 1104.09 (V C-S), 678.42 {out-of-plane stretch C-H(Ar)}. ...

Embodiment 2

[0033] A kind of sulfide heavy metal collector N 1 ,N 2 ,N 4 ,N 5 -Tetrakis(2-mercaptoethyl) 1,2,4,5-pyromelliticamide, the preparation method of which is as follows:

[0034]At 5°C, in a 150mL three-neck flask, dissolve mercaptoethylamine hydrochloride to pyromellitic anhydride at a molar ratio of 4.8, namely 5.46 g of mercaptoethylamine hydrochloride and 2.18 g of pyromellitic anhydride in 75 mL of dimethylformaldehyde In the amide, react under stirring for 6 hours to obtain the heavy metal chelating collector N 1 ,N 2 ,N 4 ,N 5 -Tetrakis(2-mercaptoethyl) 1,2,4,5-pyromellitic tetracarboxamide (TMBTC for short), the reaction yield is 51.62%.

[0035]

Embodiment 3

[0037] A kind of sulfide heavy metal collector N 1 ,N 2 ,N 4 ,N 5 -Tetrakis(2-mercaptoethyl) 1,2,4,5-pyromelliticamide, the preparation method of which is as follows:

[0038] At -5°C, in a 150mL three-necked flask, dissolve mercaptoethylamine hydrochloride to pyromellitic anhydride at a molar ratio of 5.2, that is, 5.91 g of mercaptoethylamine hydrochloride and 2.18 g of pyromellitic anhydride are dissolved in 75 mL of dimethyl In formamide, react under stirring for 8 hours to obtain the heavy metal chelate collector N 1 ,N 2 ,N 4 ,N 5 -Tetrakis(2-mercaptoethyl) 1,2,4,5-pyromellitic tetracarboxamide (TMBTC for short), the reaction yield is 76.17%.

[0039]

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 invention discloses a sulfide heavy metal chelating agent N1,N2,N4,N5-tetra(2-sulfydrylethyl)1,2,4,5-pyromellitic formamide and a preparation method thereof. The preparation method of the chelating agent comprises the following steps of: dissolving certain mol ratios of mercaptoethylamine hydrochloride and pyromellitic formic anhydride into dimethylformamide (DMF) at a certain temperature; agitating to react for a period of time and filtering to obtain the N1,N2,N4,N5-tetra(2-sulfydrylethyl)1,2,4,5-pyromellitic formamide. The sulfide heavy metal chelating agent provided by the invention is used for treating industrial wastewater containing heavy metal ions and can effectively avoid the generation of hydrogen sulfide; the sulfide heavy metal chelating agent can be rapidly reacted with various heavy metal ions in the wastewater at a room temperature to generate water-dissoluble sulfide sediment; the sediment is large in grain size and compact in flocs, so that the deposition time is shortened, heavy metal can be recycled from residues, and secondary pollution is not easy to happen. The sulfide heavy metal chelating agent N1,N2,N4,N5-tetra(2-sulfydrylethyl)1,2,4,5-pyromellitic formamide and the preparation method thereof, provided by the invention, have the advantages of simple preparation process, convenience for use and good treatment effect.

Description

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

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
Owner 南京正隆顺达高分子材料有限公司
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