Hebei Messi Biology Co., Ltd. says that since the development of a suitable chrome tanning process for leather in 1858, about half of the publications on tanning chemistry and tanning technology have been devoted to the improvement of chromium utilization. There are four main methods, i.e. control of pH, selection of masking agent, control of time and temperature, and control of liquor pH control, not only by adding more neutralizing agents to raise the pH in the later stages of tanning, but also by incorporating more modern techniques such as the addition of magnesium oxide, a crystalline soluble alkalinizing agent used to control neutralization.
The chrome tanning process requires a gradual and continuous increase in pH during the tanning process. The slow solubility and basic properties of magnesium oxide make it an excellent pH control agent. Adding magnesium oxide to the treatment of head hides can well regulate the acidity and alkalinity, further loosen the fibers of the hides and create a suitable pH value for some tanning processes.
The magnesium oxide for leather tanning independently developed and produced by Hebei Messi Biology Co., Ltd. is very suitable for chrome tanning, as an automatic adjustment of salinity, which can replace part of the alkali to improve the salinity without excess, which in turn produces chrome powder precipitation on the surface. This high purity magnesium oxide has an alkaline powdery consistency. It is insoluble in water and soluble in slightly acidic solutions, so it can be added to the chrome tanning solution to slowly raise the pH value to the appropriate salinity.
Magnesium oxide in leather tanning can be gradual and slow increase in PH, without the shortcomings of the general salinity adjustment additives; it can promote uniform penetration of chrome powder, and will not make chrome tanned leather bead surface friction, promote smooth leather grain, chrome tanning uniformity and then make the dyeing uniformity, to avoid chrome spots. Magnesium oxide dosage is small, easy to use (can be directly put into the drum once), compared with the general alkali dosage is more economic value and safety, and save labor to add alkaline salts to improve the salinity.
In addition to its use in leather tanning, magnesium oxide is also used in a variety of other industries, including:
- Agriculture: MgO is used as a fertilizer to improve the soil’s pH and increase crop yields.
- Construction: MgO is used in the production of cement, bricks, and other building materials.
- Fireproofing: MgO is used as a fireproofing agent to prevent the spread of fire.
- Medical: MgO is used as an antacid and laxative.
Magnesium oxide is a versatile and useful compound with a wide range of applications. Its use in leather tanning is just one example of its many potential applications.