The production methods of boric acid - Shanghai xin chemical industry

at present, the adoption of boric acid production methods can be divided into two step and step.

two-step process is after the pretreatment of mineral powder with soda ash, CO2 response, industrial borax was first, then with sulfuric acid or nitric acid solution of borax and boric acid by acidification in industry. Sulfuric acid method process due to the raw material price and production cost, the influence of such factors as has not adopted. In recent years, as the growth of the demand of sodium nitrate, nitric acid method technology rapid development, has become the mainstream of the two-step process.

one-step process with inorganic acid, such as sulfuric acid, hydrochloric acid, nitric acid for decomposition agent, the direct with boron minerals, such as boric magnesium ore, borax, hard reactions such as sodium calcium boron mine, quarry boron solution for making industrial process of boric acid. To use more is the present domestic sulfuric acid method. The process defect is: equipment corrosion is serious, the demand is higher, ore quality fit for processing low grade boron ore, low boron yield, product quality is not stable, mother liquor is relied on the utilization way, etc. The process and therefore is considered to be a selection process. However, because of sulfuric acid method has simple process, mature, and short process, less investment in equipment, easy operation etc. , the domestic is still mainly in this fashion. Other process methods, such as hydrochloric acid, nitric acid, producyion, sodium borate, ion exchange method and so on, more current is limited to the research category, industrial use almost didn't get.

in terms of one-step method, the present technological level is relatively low, hasn't completely solve many technical problems, the focal point is the yield, quality problems and the comprehensive utilization of mother liquor. Domestic processing boric magnesium ore preparing boric acid with sulfuric acid method of enterprise has more than 60, but really can completely solve the above problem is not much. Some research institutions has long-term commitment to boride production research and development of new processes, but either the product to be too futuristic, and disconnect near, medium-term market demand; Colour is too thick, or theory and production practice of distance is larger, ignored the reality of boron industry technical requirements, so that will not help boron industry in China's scientific and technological progress.

more borate advice can be appropriate of Shanghai xin chemical, we specialize in wholesale supply of domestic boric acid, import boric acid, looking forward to your visit.