Manufacturing method of polymeric ferric sulfate
I. Introduction
Polymeric ferric sulfate (PFS) is a kind of inorganic polymer flocculant, which is widely used in the fields of water treatment, chemical industry, papermaking, medicine, etc. It has excellent flocculation properties and can effectively remove pollutants such as suspended solids, colloids and pigments. It has excellent flocculation properties and can effectively remove pollutants such as suspended solids, colloids and pigments in water to improve water quality. In this paper, we will introduce the manufacturing method of polymeric ferric sulfate, aiming to promote its application in the field of raw materials for chemical production.
II. Materials and Methods
1. Materials
Ferrous sulfate, sulfuric acid, oxidizing agent and so on.
2. Equipment
Reactor, stirrer, metering pump, storage tank and so on.
3. Manufacturing method
(1) Acidification and oxidation method
Mix ferrous sulfate and sulfuric acid in a certain proportion, add oxidizing agent, and carry out oxidation reaction under suitable temperature and acidity to produce polymerized ferrous sulfate. The method is simple to operate, but the product quality is affected by the quality of raw materials, reaction temperature and acidity and other factors.
(2) Hydrolysis polymerization method
Ferrous sulfate is hydrolyzed into ferrous hydroxide, and then oxidizing agent is added to carry out oxidation polymerization reaction to produce polymerized ferric sulfate. The product quality of this method is stable, but the operation is more complicated.
(3) Compound polymerization method
Add ferrous sulfate, sulfuric acid and oxidizing agent into the reactor according to a certain proportion, and carry out compound polymerization reaction under stirring to produce polymerized ferrous sulfate. This method combines the advantages of acidification and oxidation method and hydrolysis polymerization method, with stable product quality and simple operation.
Three, results and discussion
1. Product quality
Through different manufacturing methods, different mass fractions of polymerized ferric sulfate products can be obtained, and the general mass fraction is between 10% and 30%. The product quality is related to the quality of raw materials, reaction conditions and other factors.
2. Influence of reaction conditions on product quality
(1) Temperature: the reaction rate is accelerated when the temperature is increased, but too high a temperature will lead to decomposition of the product and affect product quality.
(2) Acidity: if the acidity is too low, the reaction rate will be slowed down and the molecular weight of the product will be lowered; if the acidity is too high, it will lead to the decomposition of the product and affect the product quality.
(3) Oxidizer type and dosage: different oxidizers have influence on product quality, and too much or too little dosage will affect product quality.
Four, Conclusion
Polymerized ferric sulfate, as an important inorganic polymer flocculant, has a wide range of application prospects in the field of raw materials for the production of chemicals. Different mass fractions of polymerized ferric sulfate products can be obtained by different manufacturing methods, and the reaction conditions have an important influence on the product quality. In the actual production, suitable manufacturing methods and operating conditions should be selected according to the specific situation to ensure product quality and production efficiency. At the same time, the attention to environmental protection and safety issues in the manufacturing process should be strengthened to promote the greening and sustainable development of the manufacture of polymeric ferric sulfate.
