How to judge the quality of cellulose from the ash content of hydroxypropyl methylcellulose after combustion

First of all, we need to understand what is ash:

01. Ash content is also called burning residue, which can be simply understood as impurities in the product. It will be produced naturally during the production process. After the product comes out of the etherification reactor, it will enter the neutralization tank. In the neutralization tank, the pH value is first adjusted to be neutral, and then hot water is added for washing. The more hot water is added , Washing, the more times of washing, the lower the ash content, and vice versa.

02. The size of the ash is also reflected in the purity of the cellulose, the higher the purity, the less the ash after burning!

Next, let’s analyze the information we get through the burning process of hydroxypropyl methylcellulose.

First: The less ash content, the higher the quality

Determinants of the amount of ash residue:

(1) Quality of cellulose raw material (refined cotton): Generally, the better the quality of refined cotton, the whiter the cellulose produced, the better the ash content and water retention.

(2) The number of times of washing: there will be some dust and impurities in the raw materials, the more times of washing, the smaller the ash content of the finished product after burning.

(3) Adding small materials to the finished product will result in a large amount of ash after burning

(4) Failure to react well during the production process will also affect the ash content of cellulose

(5) In order to confuse everyone’s vision, some manufacturers will add combustion accelerant to it, and there will be almost no ash after burning. It burns fully, but the color after burning is still very different from that of pure powder.

Second: the length of burning time:

Cellulose with a good water retention rate will burn for a relatively long time, and vice versa for a low water retention rate.