1. In the batching of amorphous refractories, high-performance refined oxalic acid can improve the density and strength of green body, reduce water addition and porosity, and increase secondary production.

2. Refined oxalic acid has high water absorption, fast drying speed and regeneration. It belongs to the category of chemical alumina and is mainly used as water absorbent. Its raw materials and preparation methods are embodied differently according to different uses.

A large amount of moisture and humid gas will be absorbed by refined oxalic acid, keep the surrounding environment dry, maintain the good quality of some articles, while absorbing a large amount of water, its own properties remain unchanged, can be reused.

How to Analyse the Composition of Industrial Oxalic Acid Complexes

Industrial oxalic acid has a variety of ion composition. To verify the quality, concentration and composition of oxalic acid before use or experiment, the composition of its complexes can be measured by the following methods:

1. Determination of iron ions: After adding zinc powder to each solution and shaking with dilute sulfuric acid for several minutes, excessive zinc powder is removed by filtration and the filter paper is carried out in another conical bottle. Wash the original conical bottle and precipitate with dilute sulfuric acid solution, then titrate with potassium permanganate standard solution to the solution in light pink, half a minute without fading is the end point.

2. The determination of ionic charge is called industrial oxalic acid as solution. The molar conductivity is calculated by measuring its conductivity on a conductivity meter.

3. Determination of oxalate radical: accurately weigh potassium ferrite trioxalate green crystal in beaker, add dilute sulfuric acid, dilute to scale shake. Remove the industrial oxalic acid test solution in a conical bottle, add dilute sulfuric acid, and heat it for a few minutes. The potassium permanganate standard solution titrates to the solution in a light pink color, and the end point is half a minute without fading. After each titration, the solution is retained.