What are the methods for dissolving hydroxypropyl methylcellulose (HPMC)?

Mix the HPMC powder thoroughly with a large quantity of other powdered substances using a mixer. Then, add water and dissolve the mixture. At this point, the HPMC will dissolve without clumping or aggregating, because in every tiny nook and cranny, there’s only a minuscule amount of HPMC powder, which will immediately dissolve upon contact with water.

Application of Polyacrylamide as a Ceramic Wastewater Coagulant and Flocculant

The ceramic wastewater coagulant and flocculant polyacrylamide appears as white granular powder. It has a molecular weight ranging from 6 million to 25 million and exhibits excellent water solubility—dissolving in water at any proportion without being soluble in organic solvents. Its effective pH range is from 7 to 14, and in neutral to alkaline media, it displays the characteristics of a high-molecular-weight polyelectrolyte.

How can we simply and intuitively determine the quality of hydroxypropyl methylcellulose (HPMC)?

When hydroxypropyl methylcellulose (HPMC) is added to water and forms a transparent colloid, observe its light transmittance. The higher the light transmittance, the better—indicating fewer insoluble particles in the solution. Vertical reactors generally exhibit superior light transmittance, while horizontal reactors tend to perform slightly worse. However, this does not necessarily mean that products from vertical reactors are of higher quality than those from horizontal reactors; many other factors also influence product quality.

Uses of Hydroxypropyl Methylcellulose (HPMC)

In putty, cellulose ether primarily serves to retain moisture, enhance adhesion, and provide lubrication, thereby preventing cracks and dehydration caused by rapid water loss. At the same time, it improves the putty’s adhesion, reduces sagging during application, and ensures a smoother, more successful construction process.

What are the applications of polyacrylamide (PAM) in water treatment?

The biopharmaceutical industry is a major polluter. The wastewater it discharges not only has high concentrations of organic pollutants but also contains various factors that inhibit microbial growth. By employing conventional wastewater treatment technologies, excellent treatment results can be achieved. The biopharmaceutical industry uses grains as raw materials and ferments specific medicinal microorganisms through cultivation.

Cationic polyacrylamide is used as a sludge dewatering agent.

The wastewater treatment process generates large amounts of sludge. First, it is essential to clearly identify the origin of the sludge, its physical properties, its composition, and its solid content. Wastewater from different industries has varying pH levels, resulting in sludges with distinct compositions, particle sizes, charge characteristics, and charge densities.