In terms of the process:
The main byproducts are sodium chloride and sodium glycolate. The CMC belongs to the natural cellulose modification. The Food and Agriculture Organization of the United Nations (FAO) and the World Health Organization (WHO) have officially called it a “modified cellulose”.
In terms of quality:
The main measures of CMC quality are substitution degree (DS) and purity.Generally, the properties of CMC are different in DS. Increasing the enhanced solubility and the better the transparency and stability of the solution. And its aqueous solution viscosity was maximum at pH from 6 to 9. In order to ensure its quality, in addition to selecting etherizer. Some factors must affect the substitution degree and purity, such as the dosage relationship between alkali and etherizer. Etherification time, system water content, temperature, pH value, solution concentration and salt, etc.
Analysis of the advantages of carboxymethylcellulose:
The development of sodium carboxymethyl cellulose is indeed unprecedented. Especially in recent years, the expansion of the application field and the reduction of the production cost make the manufacturing of carboxymethyl cellulose more and more popular, and this phenomenon will inevitably lead to the mix of products sold on the market. Then, how to determine the quality of sodium carboxymethylcellulose, we will analyze from some physical and chemical perspectives:
First of all, it can be distinguished from the temperature of its carbonization, the general sodium carboxymethyl cellulose carbonization temperature is 280-300℃. When this temperature is not reached, then this product has a problem. (General carbing) Secondly, by its discoloration temperature to distinguish, generally sodium carboxymethyl cellulose to a certain temperature will change color, this temperature range is 190-200℃.