1. Filtration method, first of all, iron divalent is oxidized to insoluble trivalent iron, and then the sediments in industrial oxalic acid are removed by chemical precipitation to form sediments.

2. When iron impurities in industrial oxalic acid exist as colloids of organic compounds or in the form of colloids of ferric hydroxide, coagulants can be used. The purpose of using coagulants is to make colloids unstable and coagulate into larger particles, so as to remove them in industrial oxalic acid clarification and filtration process.

Industrial oxalic acid without impurities does not affect the effect of use. To remove the iron impurities, it is necessary to find out whether the iron element reacts with those substances, whether the substance reacts with iron oxalate or not, and then remove it by chemical reaction.

Do you know the grafting technology of oxalic acid?

1. Grafting technology of oxalic acid is to use special chemical reactions to react some functional groups on the high molecular weight chain with other compounds, thus introducing molecular weight or branched chains with special functional groups into the molecule, increasing molecular weight or locally changing the structure of the molecule, so as to enhance the molecule.

2. Polycondensation reaction is used. Under alkali catalysis, N is partly or totally alkylated. The structure of oxalic acid is like that of polyoxyene branched chains attached to the original polycondensation product molecules.

Grafting of oxalic acid is a molecular transfer technology. The transfer of the molecule inside oxalic acid to another molecule to form a new compound is helpful to enhance the performance of the reagent and make it develop rapidly in more fields.

What is the washing aid of oxalic acid?

1. Refined oxalic acid has its own washing-aid effect. The washing-aid principle of refined oxalic acid is that it can emulsify, disperse and sol fine organic and inorganic particles or fat droplets.

2. It is precisely these emulsifying effects that refined oxalic acid improves the suspension ability of dirt by mixing with detergent, prevents the deposition of dirt and improves the function of detergent.

The washing aid of refined oxalic acid can be embodied in cleaning, cleaning dirt, adding oxalic acid diluted by water on the basis of cleaning agent, which can achieve unexpected results. It can not only decontaminate effectively, but also brighten the area where it is located.