Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for producing composite sodium zinc carbonate from zinc salt-containing phenolic wastewater

A technology of salt phenol and zinc carbonate, which is applied in the field of zinc carbonate preparation under acidic conditions, and achieves the effects of small equipment investment, low cost and easy operation

Active Publication Date: 2019-09-13
SHANXI UNIV +1
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the acidity and sulfate characteristics of phenol-containing wastewater and the amphoteric properties of zinc salts, phenol-containing wastewater plus sodium carbonate precipitates zinc into Na 2 Zn 3 [CO 3 ] 4 ·3H 2 During the O process, by-products such as zinc carbonate, zinc hydroxide, and basic zinc carbonate will be formed

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
  • Method for producing composite sodium zinc carbonate from zinc salt-containing phenolic wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Zinc salt phenol wastewater (COD Cr 21000ppm, phenol content 7500ppm, zinc content 6%, pH 2) Add to 0.003mol / L PAMAM (G3.5 generation) aqueous solution, stir at room temperature for 30min; adjust the reaction temperature at 46°C, dropwise concentration is 15% sodium carbonate solution To the pH value of the solution is 6.7, stirred and reacted for 1 hour, filtered and separated to generate Na 2 Zn 3 [CO 3 ] 4 ·3H 2 O solid precipitated.

Embodiment 2

[0028] Zinc salt phenol wastewater (COD Cr 11000ppm, phenol content 9500ppm, zinc content 6.5%, pH 1) Add to 0.003mol / L PAMAM (G2.5 generation) aqueous solution, stir at room temperature for 30min; adjust the reaction temperature at 50℃, dropwise concentration is 18% sodium carbonate solution The pH value of the solution was 7, stirred and reacted for 1 hour, filtered and separated to generate Na 2 Zn 3 [CO 3 ] 4 ·3H 2 O solid precipitated.

Embodiment 3

[0030] Zinc salt phenol wastewater (COD Cr 32000ppm, phenol content 7500ppm, zinc content 4%, pH 1) Add to 0.003mol / L PAMAM (G2.5 generation) aqueous solution, stir at room temperature for 30min; adjust the reaction temperature at 50℃, dropwise concentration is 16% sodium carbonate solution The pH value of the solution was 7, stirred and reacted for 1 hour, filtered and separated to generate Na 2 Zn 3 [CO 3 ] 4 ·3H 2 O solid precipitated.

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 method for producing composite sodium zinc carbonate from zinc salt-containing phenolic wastewater and belongs to the technical field of zinc carbonate production under an acid condition. The method comprises the following steps: under coactions of nitrogen-oxygen containing functional groups in polyamidoamine macromolecules (PAMAM) and zinc ions in zinc salt-containing phenolic wastewater, accumulating and dispersing zinc species into a PAMAM nano cavity to form a zinc-PAMAM complexing solution, adding a sodium carbonate precipitant, and selectively generating Na2Zn3[CO3]4*3H2O precipitate through competitiveness of phenol in the wastewater and zinc in the zinc-PAMAM complexing solution upon sodium carbonate. The method had the characteristics of being environment-friendly, good in practicability, small in equipment investment, gentle in process condition, easy to operate and low in cost.

Description

technical field [0001] The invention relates to a method for producing composite zinc carbonate sodium salt from zinc-salt-containing phenol wastewater, and belongs to the technical field of zinc carbonate preparation under acidic conditions. The molecular formula of the compound zinc carbonate sodium salt is Na 2 Zn 3 [CO 3 ] 4 ·3H 2 O. Background technique [0002] Phenolphthalein is an important chemical widely used in medicine, chemical industry and other fields. At present, the industry uses zinc chloride to catalyze the reaction of phenol and phthalic anhydride in the presence of concentrated sulfuric acid, followed by washing and separation to synthesize it. However, a large amount of phenolic acidic wastewater containing zinc chloride will be formed in the phenolphthalein production process, which is very easy to cause environmental pollution. How to treat this wastewater is an urgent need for the phenolphthalein production industry. Na 2 Zn 3 [CO 3 ] 4 ·3...

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): C01G9/00
CPCC01G9/00C01G9/006C01P2002/72
Inventor 贾志奇王建生张卫民张伟波张鹏
Owner SHANXI UNIV