Fumaric Acid Waste Water Recycling Use

Fumaric acid is kind of important chemical raw materials, our production of fumaric acid is about900000tons every year, per1ton of fumaric acid makes production about3.5tons waste water. Wastewater contains a certain number of bromide, ammonium sulfate, fumaric acid, maleic acid, etc. The biochemical of fumaric acid wastewater is poorer, treatment is difficult. This paper mainly studied the utilization of fumaric acid wastewater process. First using macroporous alkalescence anion resin adsorption fumaric acid and maleic acid, fumaric acid waste water using high performance liquid chromatography (HPLC) method to track detecting adsorption rate. Screening of a large adsorption capacity, resistance to strong acid, easy regeneration, low cost resins, respectively, from a variety of factors, which affect the adsorption effect of optimization selection, the system study of some factors such as pH, temperature, flow velocity, choose the best adsorption conditions. The optimum conditions for adsorption of fumaric acid wastewater for choose macroporous anion exchange resin D301-F type, adjust wastewater pH of2, temperature of40℃resin at this time of fumaric acid waste liquid adsorption rate was98.45%. One hundred g resin can process about800ml water, at this time of organic acids in fumaric acid waste water adsorption rate at about98.5%.After adsorption of fumaric acid wastewater treatment by electrolytic oxidation method to fumaric acid bromine in the wastewater by combining state transition for free, after the enrichment of bromide was isolated. Used in qualifying examination and test in production of organic glass cell, used in simulating industrial test design and participate in the production of electrolytic tank, a cation membrane separated into the cathode and anode, some of the factors affecting the electrolytic efficiency were studied systematically. Studied the way of the cathode and anode, electrolytic electrode, voltage, current, temperature, time, cation exchange membrane and supporting electrolyte, circulation rate and so on conditions on the influence of the electrolytic efficiency. Designed and produced for electrolytic fumaric acid waste water extract bromide complete sets of equipment, the preliminary research has obtained the ideal effect, optimize the best electrolytic conditions simulated industrial experiments for: electrodes, anode for titanium mesh plating iridium tantalum, cathode nickel plating and coating for316L stainless steel wire mesh, ruthenium, size of800*400. Current is34a, the voltage is5v, electrolytic time was90minutes, the experiment operating temperature control0-10℃, blow out with air blow out method free after electrolytic silver bromide, By sodium carbonate and urea mixture bromide absorption, complete reaction, sodium bromide, crystallization, sodium bromide products after solid-liquid separation, the calculation of Br2in waste water recovery rate is about80%.The study in order to achieve the recycling use of fumaric acid wastewater accumulated important technical parameters, which laid a foundation for its finally realize industrialization, new technology has good application prospects.