What are the preparation methods of active magnesium oxide?

Chemical reaction process:In this method,ammonium carbonate solution is added to brine,heated and precipitated to produce basic magnesium carbonate precipitate.Then,active magnesium oxide is finally produced through filtration,washing,drying,and calcination decomposition.

 

                     There are various methods for preparing active magnesium oxide,including brine ammonium carbonate method,dolomite carbonization method,and brine ammonia method.These methods each have their own characteristics and application scenarios,which can meet different industrial needs.The following will provide a detailed introduction to several main preparation methods of active magnesium oxide:

Brine ammonium carbonate method

                     Chemical reaction process:In this method,ammonium carbonate solution is added to brine,heated and precipitated to produce basic magnesium carbonate precipitate.Then,active magnesium oxide is finally produced through filtration,washing,drying,and calcination decomposition.

                     Advantages:This method has the advantages of easy availability of raw materials and easy control of reactions,making it suitable for large-scale production.

                     Application:Mainly used in applications that require high-purity active magnesium oxide,such as the production of electronic components and high-performance ceramics.

Dolomite carbonization method

                     Process flow:After calcining dolomite(xMgCO3·yCaCO3)or magnesite(MgCO3),it is digested with water to produce magnesium hydroxide(Mg(OH)2)and calcium hydroxide(Ca(OH)2).Then carbonize with CO2 to obtain magnesium bicarbonate and by-product calcium carbonate.After removing calcium carbonate through treatment,the mother liquor is pyrolyzed to obtain basic magnesium carbonate,which is then calcined at 800℃for 1-2 hours to produce activated magnesium oxide.

                     Advantages:Natural mineral dolomite can be used as raw material,with low cost and suitable for industrial scale production.

                     Application:Widely used as a filler and reinforcing agent for materials such as rubber,plastic,and paint.

Brine ammonia method

                     Process description:Magnesium hydroxide precipitate is generated by introducing ammonia gas into the brine.Then,the magnesium hydroxide is filtered,washed,broken(crushed),dried,and finally transferred to a rotary calcination furnace for calcination,controlled at 500℃for 2 hours,to produce active magnesium oxide.

                     Advantages:This method can effectively control the particle size and morphology of magnesium hydroxide,which helps to improve the activity of the final product.

                     Application:Commonly used in the fields of medicine and environmental protection,such as as as antacids and adsorbents for harmful gases.

Magnesite calcination method

                     Preparation steps:Magnesite(mainly composed of MgCO3)is directly calcined to generate magnesium oxide and carbon dioxide.By controlling the calcination temperature and time,highly active magnesium oxide can be produced.

                     Advantages:Easy to operate,suitable for industrial applications that do not require particularly high activity.

                     Application:Widely used in building materials,refractory materials,and metallurgical industries.

Serpentine acid leaching method

                     Extraction process:Serpentine contains abundant silicon magnesium minerals.Magnesium is extracted by acid leaching,and then activated magnesium oxide is prepared through precipitation,filtration,drying,and calcination steps.

                     Advantages:It can effectively extract high-purity magnesium oxide from low-grade ores.

                     Application:Mainly used for producing high-purity magnesium oxide and special magnesium oxide materials.

Nanotechnology synthesis method

                     Technical Introduction:Using nanotechnology,magnesium oxide with nanoscale particle size is synthesized by controlling chemical reaction conditions.This method can obtain magnesium oxide with a large specific surface area and extremely high activity.

                     Advantages:The product has extremely high chemical activity and physical adsorption capacity,suitable for cutting-edge technology fields.

                     Application:Mainly used in the manufacturing of catalysts,high-end electronic materials,and new composite materials.

External heating rotary kiln method

                     Production process:Under external heating conditions,the raw materials are calcined in a rotary kiln to generate active magnesium oxide.This method can be continuously produced with high efficiency.

                     Advantages:Good production continuity,high degree of automation,suitable for large-scale production.

                     Application:Widely used for magnesium oxide demand in industrial and agricultural fields.

                     In summary,as an important inorganic material,the various preparation methods of activated magnesium oxide not only demonstrate rich chemical and physical technologies,but also provide broad application fields.Activated magnesium oxide plays an irreplaceable role in industrial production and environmental governance.Continuing to explore new preparation techniques and improve existing processes will further promote the application prospects and technological progress of this material.