Study on Process Technology of Raw Material Water Pretreatment for Extracting Bromine

Abstract

In view of the characteristics of different bromine raw materials such as seawater, desalinated concentrated seawater, and cultured salt brine, the raw material liquid is carried out by examining physical and chemical indicators such as temperature, turbidity, pH, Br-, suspended solids, COD, residual chlorine and chemical components. Purification, acidification, oxidation and other pretreatment processes are studied to form a pretreatment process suitable for different bromine feedstocks. Satisfy the influent water quality requirements of different bromine extraction methods, form a mature pretreatment process, provide important support for the related vertical issues in the field of bromine and the application of horizontal development projects such as feasibility study and design, and help to achieve desalination projects and The scientific combination of bromine engineering.

Development of Robust Fluorinated SiO2/PVDF Composite Hollow Fiber Membrane for Bromine Resources Recovery from Brine via Membrane Distillation

“…Two phases are reacted in the tower to generate the bromine. Vapor that contains bromine is cooled and collected as a condensate from the upper exit from the contact tower. − Even though the whole process of steam-distillation is simple, significant energy consumption is needed to heat the bromide with high concentrations (>1000 ppm) to produce the bromine. − For the air-blowing-out method, multiple steps of acidification-oxidization, blowing-out, absorption, distillation, condensation, and purification are required to produce bromine. − Compared with the steam-distillation method, the air blowing-out method is applied more widely because it could treat bromide with lower concentrations; however, it still has other disadvantages of large equipment capital, high energy consumption, high footprint, and low resource utilization . Therefore, a new separation technology that can overcome all the above obstacles is urgently demanded to extract bromine from brines efficiently.…”