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The preparation method of polyferric sulfate

A technology for polymerizing ferric sulfate and ferrous sulfate, which is applied in the fields of ferric sulfate, chemical instruments and methods, flocculation/sedimentation water/sewage treatment, etc., can solve the problems of long reaction time, large energy consumption, high temperature, etc. rate, the effect of shortening the reaction time, increasing the rate of occurrence

Active Publication Date: 2021-09-28
杭州金丰环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In industrial production, polyferric sulfate is generally oxidized by acid solution containing ferrous sulfate under the catalysis of sodium nitrite. The above process generally requires a long reaction time and high temperature, and consumes a lot of energy.

Method used

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  • The preparation method of polyferric sulfate
  • The preparation method of polyferric sulfate
  • The preparation method of polyferric sulfate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The preparation method of polyferric sulfate comprises the steps:

[0039] S1. Weigh ferrous sulfate, add water to dissolve it, add acid I, and stir well to obtain the first solution, wherein acid I is sulfuric acid, which is added while stirring to prevent splashing or overheating. The first solution is prepared After completion, in every kilogram of water, the amount of ferrous sulfate added is 0.6kg, and the ratio of the amount of substance of sulfuric acid to the amount of substance of ferrous ion is 0.2:1.

[0040] S2, put 10L of the first solution into the reactor, add catalyst and co-catalyst in advance in the reactor, wherein, the catalyst is sodium nitrite, and the ratio of the amount of substances between sodium nitrite and ferrous sulfate is 0.01:1, which helps The catalyst is porous ceramics, and the porous ceramics are set in the reactor in the form of four porous ceramic plates. The oxidant is introduced into the system. The oxidant is pure oxygen, corresp...

Embodiment 2～6

[0043] The difference between the preparation method of polyferric sulfate and Example 1 is that the palladium membrane is modified on the porous ceramic plate, and the mass ratio of the palladium membrane to the porous ceramic plate is 1:200, 1:400, 1:900, 1:1200, 1:2000. The palladium film is attached to the surface of the porous ceramic plate by vapor deposition, and the mass change of the porous ceramic plate before and after modifying the palladium film is determined by weighing method, and then the adhesion amount of the palladium film can be calculated. The adhesion amount of the palladium film can be adjusted by adjusting the parameters in the vapor deposition process.

[0044] Above-mentioned reaction relies on reactor such as figure 1 As shown, the kettle body 1 is included, the kettle body 1 is provided with an air inlet pipe 2, and the air inlet pipe 2 is provided with an air inlet pump 21 connected to an oxygen tank. The kettle body 1 is provided with a porous c...

Embodiment 7～9

[0046] The difference between the preparation method of polyferric sulfate and Example 4 is that the porosity of the porous ceramic plate is 50%, 70%, and 80% in sequence.

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Abstract

This application relates to the field of flocculant production, more specifically, it relates to the preparation method of polyferric sulfate, comprising the following steps: S1, mixing ferrous sulfate aqueous solution with acid I, heating and fully mixing to obtain the first solution; S2 . Add sodium nitrite and co-catalyst to the first solution in step S1, control the temperature to 50-60° C., and add an oxidizing agent to obtain the second solution after sufficient reaction; S3. Cool the second solution and filter it, Retain the filter residue; wherein, the co-catalyst includes porous ceramics, the oxidant includes oxygen, and the ratio of sodium nitrite to ferrous sulfate is (0.6-0.15):1. In this application, by using porous ceramics as cocatalysts, the microporous structure in porous ceramics can greatly increase the oxidation rate of ferrous ions, thereby increasing the synthesis rate of polyferric sulfate.

Description

technical field [0001] This application relates to the field of flocculant production, more specifically, it relates to the preparation method of polyferric sulfate. Background technique [0002] Polyferric sulfate is a commonly used flocculant and is widely used in the field of sewage treatment. [0003] In industrial production, polyferric sulfate is generally oxidized by acid solution containing ferrous sulfate under the catalysis of sodium nitrite. The above process generally requires a long reaction time and high temperature, and consumes a lot of energy. Contents of the invention [0004] In order to shorten the reaction time of polyferric sulfate production, the application provides a preparation method of polyferric sulfate. [0005] A kind of preparation method of polyferric sulfate provided by the application adopts the following technical scheme: [0006] The preparation method of polyferric sulfate comprises the steps: [0007] S1, mixing ferrous sulfate aqu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/14C02F1/52
CPCC01G49/14C01P2006/80C02F1/5245
Inventor 周益钧於东军杨建新曹玉富
Owner 杭州金丰环保科技有限公司