In today’s society, polymer synthesis technology is developing rapidly, and materials such as plastics, rubber, and synthetic fibers are widely used in daily life. However, all polymers have flaws. Because they are composed of chains of carbon and hydrogen atoms, the compounds are flammable, which can cause fires to spread quickly.
When a certain amount of flame retardant is added to a substance, the flame retardant performance of the material will be improved accordingly, but the mechanical properties or other properties of the material will often be affected, and sometimes it will cause inconvenience to processing. Therefore, in order to maintain the comprehensive performance of flame retardant composite materials, it is necessary to consider the comprehensive performance of flame retardants.
(1) Magnesium hydroxide has a high decomposition temperature and a higher ignition point than aluminum hydroxide, which increases the heating temperature of polymer materials;
(2) MgO generated after combustion and dehydration is a refractory material and an alkaline oxide that can absorb acid gas;
(3) Strong heat absorption capacity and high flame retardant efficiency;
(4) Low cost and easy to process in different polymer materials.
In recent years, magnesium hydroxide, as a green and environmentally friendly flame retardant, has been widely used.
Acid wastewater treatment
The neutralization reaction of magnesium hydroxide is slow, and the particles produced after the neutralization reaction are larger in size and settle quickly. Magnesium hydroxide can simplify operating procedures, reduce operating time, have good controllability, and reduce treatment costs in the treatment of acid wastewater.
Heavy metal removal
Due to the large specific surface area of magnesium hydroxide particles, it has strong adsorption capacity and can remove environmentally harmful heavy metal ions such as Ni2+, Cd2+, Mn2+, and other heavy metal elements such as Mo, Co, Fe, W and V from industrial wastewater. etc. can also be removed with magnesium hydroxide, light burned magnesium oxide or magnesium aluminum carbonate.
Flue gas desulfurization
There are currently nearly 20 relatively mature desulfurization technologies. Among them, the magnesium hydroxide desulfurization technology is economical and practical and has good development prospects in the future. The process advantages of magnesium hydroxide desulfurization mainly include high desulfurization efficiency, low investment costs, low operating costs, high comprehensive benefits, reliable operation and no secondary pollution.