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

Preparation method of potassium ferrate

A technology of potassium ferrate and iron sulfate, applied in chemical instruments and methods, iron compounds, inorganic chemistry, etc., to achieve the effects of reducing production costs, low prices, and avoiding decomposition

Pending Publication Date: 2021-11-02
SHAANXI RES DESIGN INST OF PETROLEUM CHEM IND
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the requirement for high temperature is a safety and energy issue

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
  • Preparation method of potassium ferrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A preparation method of potassium ferrate, comprising the following steps:

[0033] (1) Use ferrous sulfate to prepare ferric sulfate: Add 30g of ferrous sulfate crystals into 250mL of deionized water, after dissolving, add concentrated sulfuric acid dropwise to the system until the pH of the system is 1, then add 2.5g of hydrogen peroxide, filter, and dry. get ferric sulfate;

[0034] (2) Preparation of potassium ferrate: Take 21g of ferric sulfate and add it to 40g, 4mol / L potassium hydroxide aqueous solution, mix and stir, and add 100gKHO to it under the condition of ice water bath 2 , stirred, and when the solution was purple, filter it immediately; then add 40 g of saturated potassium hydroxide solution to the filtrate in batches, continue to mix and stir in the ice-water bath, and precipitate a purple-black precipitate, filter, and vacuum-dry at 60°C until constant Weight, that is, to obtain potassium ferrate;

[0035] In this example, 16.8 g of potassium ferrat...

Embodiment 2

[0037] A preparation method of potassium ferrate, comprising the following steps:

[0038] (1) Prepare ferric sulfate by using ferrous sulfate: Add 30g of ferrous sulfate crystals into 250mL of deionized water, after dissolving, add concentrated sulfuric acid dropwise to it until the pH of the system is 1.5, then add 2.5g of hydrogen peroxide, filter, and dry. get ferric sulfate;

[0039] (2) Preparation of potassium ferrate: Take 21g of ferric sulfate and add it to 60g, 4mol / L potassium hydroxide aqueous solution, mix and stir, and add 80g KHO to it under the condition of ice water bath 2 , stirred, and when the solution was purple, filter it immediately; then add 60 g of saturated potassium hydroxide solution to the filtrate in batches, continue to mix and stir in the ice-water bath, and precipitate a purple-black precipitate, filter, and vacuum-dry at 60°C until constant Weight, that is, to obtain potassium ferrate;

[0040] In this example, 14.6 g of potassium ferrate wa...

Embodiment 3

[0042] A preparation method of potassium ferrate, comprising the following steps:

[0043] (1) Use ferrous sulfate to prepare ferric sulfate: Add 30 g of ferrous sulfate crystals into 250 mL of deionized water, dissolve, add concentrated sulfuric acid dropwise to the system until the pH of the system is 0.5, then add 2.5 g of hydrogen peroxide, filter, and dry , to obtain ferric sulfate;

[0044] (2) Preparation of potassium ferrate: Take 21g of ferric sulfate and add it to 60g, 3mol / L potassium hydroxide aqueous solution, mix and stir, and add 90g KHO to it under the condition of ice-water bath 2 , stirred, and when the solution was purple, filter it immediately; then add 60 g of saturated potassium hydroxide solution to the filtrate in batches, continue to mix and stir in the ice-water bath, and precipitate a purple-black precipitate, filter, and vacuum-dry at 70°C until constant Weight, that is, to obtain potassium ferrate;

[0045] In this example, 17.2 g of potassium fe...

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 preparation method of potassium ferrate. The preparation method comprises the following steps: (1) preparing ferric sulfate; (2) preparing potassium ferrate: adding ferric sulfate into a potassium hydroxide aqueous solution, mixing and stirring, adding KHO2 into the solution under the condition of ice-water bath, stirring, and immediately filtering when the solution is purple; and then adding a saturated potassium hydroxide solution into the filtrate in batches, continuously mixing and stirring in the ice-water bath, separating out purple black precipitate, filtering and drying to obtain the potassium ferrate. According to the method for preparing the potassium ferrate, the raw materials are low in price, the production cost is reduced, the hydroxyl free radicals are adopted as the oxidizing agent, use of chlorine (Cl2) and hypochlorite (ClO-) is effectively avoided, and meanwhile decomposition of the potassium ferrate at the high temperature can be avoided.

Description

technical field [0001] The invention belongs to the technical field of preparation of chemical water treatment agents, and in particular relates to a preparation method of potassium ferrate. Background technique [0002] Potassium ferrate is a strong oxidizing agent, and its oxidation-reduction potential is as follows: [0003] 3e - +8H + +FeO 4 2- → Fe 3+ +4H 2 O E0=2.20V [0004] 3e - +4H 2 O+FeO 4 2- → Fe 3+ +8OH - E0=0.72V [0005] It can react with a variety of inorganic or organic; it can be used as an important and selective oxidant for synthetic organic research and can oxidize / remove various organic compounds. [0006] Due to FeO 4 2- +H 2 O → Fe 3+ +O 2 , Potassium ferrate destroys many pollutants in the aqueous medium, and the final iron product is iron ions forming hydroxide oligomers, which can flocculate and settle to remove suspended particles. Ferrate has the advantage of being "environmentally safe" because its iron product is just an ir...

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): C01G49/00
CPCC01G49/0081
Inventor 张瑞张晨晖雷立宋扬扬刘军
Owner SHAANXI RES DESIGN INST OF PETROLEUM CHEM IND