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

Comprehensive treatment method of graphene oxide waste acid

A comprehensive treatment, graphene technology, applied in the direction of magnesium sulfate, bisulphate preparation, etc., can solve the problems of low element utilization and low purity of magnesium sulfate

Pending Publication Date: 2022-03-11
山东金利特新材料有限责任公司
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved in the present invention is to provide a comprehensive treatment method for graphene oxide waste acid to solve the problems of low purity of magnesium sulfate produced in waste acid treatment and low utilization rate of elements in waste acid in view of the deficiencies of the prior art

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Take 1000 kg of graphene oxide waste acid (the mass fractions of sulfuric acid, potassium sulfate, and manganese sulfate are 10%, 1%, and 1%, respectively) to filter and remove impurities through sand filter, filter cloth, fiber, and filter membrane in sequence.

[0025] (2) Add magnesium oxide to the filtered waste sulfuric acid until the pH value is 3, and keep the reaction temperature at 10°C.

[0026] (3) Add a specified amount of KMnO to the reaction solution with a pH of 3 4 (KMnO 4 The molar ratio of manganese sulfate and manganese sulfate is 2:3) and mix well and continue to react for 1min to obtain MnO 2 precipitation mixture;

[0027] (4) Filter the above precipitation mixture, and obtain MnO after solid-liquid separation 2 precipitate and filtrate.

[0028] (5) Add magnesium oxide to the above filtrate until it fully reacts with sulfuric acid, and the reaction temperature is 10°C.

[0029] (6) Distill the mixture in (5) under reduced pressure (80°C, ...

Embodiment 2

[0032] (1) Take 1000 kg of graphene oxide waste acid (the mass fractions of sulfuric acid, potassium sulfate, and manganese sulfate are 50%, 2.1%, and 4%, respectively) to filter and remove impurities through sand filter, filter cloth, fiber, and filter membrane in sequence.

[0033] (2) Add magnesium oxide to the filtered waste sulfuric acid until the pH value is 5, and keep the reaction temperature at 50°C.

[0034] (3) Add a specified amount of KMnO to the reaction solution with a pH of 5 4 (KMnO 4 The molar ratio of manganese sulfate and manganese sulfate is 2:3) and then continue to react for 5 hours to obtain MnO 2 precipitation mixture.

[0035] (4) Filter the above precipitation mixture, and obtain MnO after solid-liquid separation 2 precipitate and filtrate.

[0036] (5) Add an equal stoichiometric amount of magnesium oxide to the above filtrate to fully react with the spent acid, and the reaction temperature is 50°C.

[0037] (6) Distill the mixture in (5) under...

Embodiment 3

[0040] (1) Take 1000 kg of graphene oxide waste acid (the mass fractions of sulfuric acid, potassium sulfate, and manganese sulfate are 85%, 4.3%, and 8%, respectively) to filter through sand filter, filter cloth, fiber, and filter membrane to remove impurities.

[0041] (2) Add magnesium oxide to the filtered waste sulfuric acid until the pH value is 7, and keep the reaction temperature at 90°C.

[0042] (3) Add a specified amount of KMnO to the reaction solution with a pH of 7 4 (KMnO 4 The molar ratio of manganese sulfate and manganese sulfate is 2:3) and then continue to react for 15 hours to obtain MnO 2 precipitation mixture.

[0043] (4) Filter the above precipitation mixture, and obtain MnO after solid-liquid separation 2 precipitate and filtrate.

[0044] (5) Add an equal stoichiometric amount of magnesium oxide to the above filtrate to fully react with the spent acid, and the reaction temperature is 90°C.

[0045] (6) Distill the mixture in (5) under reduced pre...

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 relates to a comprehensive treatment method of graphene oxide waste acid and belongs to the field of wastewater treatment.The mode that magnesium oxide is added in two steps is adopted, magnesium oxide is added in the first batch to adjust the pH value of the waste acid to be proper, then potassium permanganate is added to convert manganese ions in the solution into manganese dioxide, filtration and separation are conducted, magnesium oxide is supplemented to react with sulfuric acid, and the waste acid is obtained; carrying out circulating concentration and crystallization until the molar mass ratio of Mg < 2 + > to K < + > in a separation solution is 1: 1, and separating to prepare a magnesium sulfate chemical product; according to the method, the purity of the obtained magnesium sulfate is guaranteed, the purity of the obtained magnesium sulfate can reach 99% or above, all-element recycling of the graphene waste acid is achieved, and no waste is discharged.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a comprehensive treatment method for graphene oxide waste acid. Background technique [0002] Graphene is an emerging material with extremely broad application prospects. At present, the main production process of graphene is redox method, that is, graphene oxide is first produced and then reduced to graphene. There are two commonly used production processes for graphene oxide: ① use potassium permanganate as a strong oxidant and intercalate with sulfuric acid; ② use potassium persulfate and phosphorus pentoxide to pre-oxidize graphite powder, and then use potassium permanganate It is a strong oxidizing agent and intercalated with sulfuric acid. The oxidation process will produce a large amount of waste sulfuric acid, a small amount of manganese ions and potassium ions, and trace amounts of heavy metals brought in by raw materials. [0003] In the prior art, the Chinese pate...

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): C01F5/40C01D5/12
CPCC01F5/40C01D5/12C01P2006/80
Inventor 刘太峥宋肖肖侯士峰王文文曹昂公维杰刘同浩李鹏飞
Owner 山东金利特新材料有限责任公司
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