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Method for preparing silicon dioxide from graphene oxide waste liquid

A technology of silica and graphene, which is applied in the fields of silica, silica, energy and wastewater treatment, etc., can solve problems such as difficult to produce economic benefits, low removal efficiency, and many impurities in silica, and achieve waste reuse , environmental protection, good stability

Active Publication Date: 2021-04-20
福建省三明正元化工有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, based on the method for preparing silicon dioxide in this patent, directly adding the waste liquid of graphene oxide to the aqueous solution of sodium silicate to prepare silicon dioxide will cause more impurities to be coated in the prepared silicon dioxide. Such as manganese compounds, so that the prepared silica has more impurities and poor quality, and it is difficult to produce economic benefits. Although there are many methods for removing metal ions, the common problems are low removal efficiency and separation after removal. Difficult, not suitable for many problems such as graphene oxide waste liquid removal

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  • Method for preparing silicon dioxide from graphene oxide waste liquid

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Embodiment 1

[0039] A kind of method that utilizes graphene oxide waste liquid to prepare silicon dioxide, first the waste liquid that prepares graphene oxide is collected and takes by weighing 500g of this waste liquid that prepares graphene oxide, contains potassium ion, manganese ion, Sulfate ion, hydrogen ion, take by weighing the organic chelating agent 5g that prepares according to above-mentioned method and join in this waste liquid, leave standstill 10 minutes after stirring, make this organic chelating agent fully chelate the manganese ion in waste liquid, Then add 8g sherwood oil, stir, leave standstill, now sherwood oil has fused the organic chelating agent that has chelated manganese ion, has formed organic layer, and all the other waste liquids are inorganic layer, utilize separatory funnel to remove organic layer then, The obtained inorganic layer is the first acidic solution. Compared with the original waste liquid, the first acidic solution has removed part of the manganese ...

Embodiment 2

[0042] A kind of method that utilizes graphene oxide waste liquid to prepare silicon dioxide, first the waste liquid that prepares graphene oxide is collected and takes by weighing 500g of this waste liquid that prepares graphene oxide, contains potassium ion, manganese ion, Sulfate ion, hydrogen ion, take by weighing the organic chelating agent 5g that prepares according to above-mentioned method and join in this waste liquid, leave standstill 10 minutes after stirring, make this organic chelating agent fully chelate the manganese ion in waste liquid, Then add 8g sherwood oil, stir, leave standstill, now sherwood oil has fused the organic chelating agent that has chelated manganese ion, has formed organic layer, and all the other waste liquids are inorganic layer, utilize separatory funnel to remove organic layer then, The obtained inorganic layer is the first acidic solution. Compared with the original waste liquid, the first acidic solution has removed part of the manganese ...

Embodiment 3

[0045] A kind of method that utilizes graphene oxide waste liquid to prepare silicon dioxide, first the waste liquid that prepares graphene oxide is collected and takes by weighing 500g of this waste liquid that prepares graphene oxide, contains potassium ion, manganese ion, Sulfate ion, hydrogen ion, take by weighing the organic chelating agent 5g that prepares according to above-mentioned method and join in this waste liquid, leave standstill 10 minutes after stirring, make this organic chelating agent fully chelate the manganese ion in waste liquid, Then add 8g sherwood oil, stir, leave standstill, now sherwood oil has fused the organic chelating agent that has chelated manganese ion, has formed organic layer, and all the other waste liquids are inorganic layer, utilize separatory funnel to remove organic layer then, The obtained inorganic layer is the first acidic solution. Compared with the original waste liquid, the first acidic solution has removed part of the manganese ...

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Abstract

The invention belongs to the technical field of methods for preparing silicon dioxide by using waste liquid, and discloses a method for preparing silicon dioxide by using graphene oxide waste liquid. The method comprises the following steps of: collecting waste liquid obtained after graphene oxide preparation; sequentially adding a first chelating agent and granular graphene obtained after hydrazine hydrate reduction of graphene oxide into the waste liquid, so as to remove manganese ions in the graphene waste liquid; removing the first chelating agent and graphene through extraction, filtration and other methods to obtain a second acidic solution; dropwise adding the second acidic solution into a prepared sodium silicate aqueous solution of which the pH value is adjusted by sulfuric acid, and performing aging to obtain a first precipitate; and finally, washing, filtering, drying and calcining the first precipitate to obtain silicon dioxide. According to the method disclosed by the invention, the reutilization of the graphene oxide waste liquid is realized, the environment is protected, and the quality of the prepared silicon dioxide product is relatively good.

Description

technical field [0001] The invention relates to the technical field of a method for preparing silicon dioxide by using waste liquid, in particular to a method for preparing silicon dioxide by using graphene oxide waste liquid. Background technique [0002] Graphene oxide is the oxide of graphene, which has more oxygen-containing functional groups and is easily soluble in water. It has a wide range of applications in polymer composite materials and inorganic composite materials. The preparation of graphene oxide is generally obtained by adding concentrated sulfuric acid, potassium permanganate, and hydrogen peroxide solution in proportion to flake graphite, and in the process of preparing graphene oxide, waste liquid will inevitably be produced. The ingredients contain potassium ions, manganese ions, hydrogen ions, and sulfate ions. [0003] The invention patent with the publication number CN105923628A discloses a wastewater treatment method in the graphene preparation proce...

Claims

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Application Information

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IPC IPC(8): C01B33/12
CPCY02W10/37
Inventor 曾土儿万火平张起森胡振超曾宪灿武智鹏陈登龙白欣
Owner 福建省三明正元化工有限公司
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