From a chemical point of view, oxalic acid has a variety of molecular composition. In some industrial needs, in order to make the product tend to a stable state, it is necessary to control the molecular weight of the product.

1. To stop the growth of the chain, monocarboxylic acid or monoalkyl acid can be added to the polyester chain to seal the end in time.

2. Prevent the occurrence of low molecular weight chain segments, pay attention to increasing the average molecular weight of oxalic acid, in order to complete esterification, control the reaction conditions of polyester.

3. In order to add high molecular weight segments and prevent cross-linking between oxalic acid molecular chains, it is necessary to take part in the shaker properly, and to adopt higher temperature and longer reaction time in the process, so that the molecular weight of the reaction result is high and the strength after curing is high.

Oxalic acid has high molecular activity. It has activity. Proper inhibition of its molecular weight not only improves its curing effect, but also makes its molecule more stable and its properties remain unchanged for a long time.

What is the cooling and filtering process of oxalic acid?

1. Refined oxalic acid is cooled and filtered into the cooler. The bottom of the cooler is filled with polytetrafluoroethylene dilute filler. Hydrogen fluoride gas is filtered. The purified hydrogen fluoride gas is transformed into a critical state of gas-liquid phase by cooling, and a small amount of impurities are separated.

2. The impurity part is refluxed to the distillation kettle and filtered by cooling. The purified hydrogen fluoride gas can be re-purified into the absorption tower. The refined oxalic acid semi-finished product from the absorption tower is filtered into the filter, and the high purity product is obtained.

High quality refined oxalic acid not only reflects its characteristics, but also can be used for a long time. It is widely used in various industries. If you want to obtain high quality products, it can be obtained by cooling and filtering.