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What are the production processes of magnesium hydroxide?

2020-04-03 09:37:30
Times

The methods of magnesium hydroxide include ammonia method caustic soda method, the ammonia method is the main method. Due to the high content of ammonia nitrogen in the production of wastewater the ammonia method, it causes great environmental pollution. At the same time, due to the volatile irritating smell of ammonia, which results in a poor working environment for the workers, this method is limited in the expansion of production. Therefore, the use of low-cost lime brine as raw materials to study a new process for preparing magnesium hydroxide.


At present, the resources in the brine, especially the abundant magnesium, are used, causing a large amount of resource loss. In addition, the bittern produced in the production of sea salt also contains a large amount of magnesium. This causes a large amount of magnesium to be discharged into the salt lake sea salt in the form of waste liquid every year, which wastes resources pollutes the environment. my country's bitter brine water resources rank first in the world, but it has been effectively developed utilized. The utilization of magnesium resources in brine is an important issue in the comprehensive utilization of bittern halogenated resources. Among them, using brine as raw material to prepare magnesium hydroxide is an effective way.


Magnesium hydroxide is a weak base. Compared with stronger alkaline materials such as lime, caustic soda soda ash, it has the advantages of large buffering capacity, large activity, strong adsorption capacity, non-corrosive, safe reliable, non-toxic harmless. . Magnesium hydroxide has strong adsorption, high activity, good fluidity of slurry-like products, easy to transport, store, easy to use adjust. It is widely used in environmental protection abroad can be used as a neutralizing agent for industrial acid-containing wastewater. Removal of heavy metals in mine emissions, flue gas desulfurization agent, acid rain treatment pH adjuster. After special treatment, magnesium hydroxide is also an inorganic non-toxic flame retardant, with multiple performances such as flame retardant, dripping resistance filling. The research development production of magnesium hydroxide are very active, its application fields are constantly expanding, with broad market prospects.



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