|
Sulfonated alkali fusion production resorcinol extraction and distillation of the product purification process will produce a large number of high-concentration waste water and distillation residues. The high toxicity of effluents and waste, great harm to humans and the environment, to deal with them is very difficult. Therefore, in order to reduce environmental pollution, conserve water resources, efficient use of resources, this paper resorcinol wastewater treatment and waste utilization. Firstly, resorcinol wastewater as the research object, through the \This paper analyzes the resorcinol wastewater, where organic matter content is high, mainly containing resorcinol, phenol, alcohol and sodium, initial pH 3.0 ~ 4.0, CODcr10000-30000mg / L. complex extraction wastewater pretreatment process, the effects of different extractants extraction efficiency, identified with TBP as extractant, by pH, water ratio, the standing time and other single factor experiment the optimum extraction conditions, the CODcr removal rate 80.2%, can effectively reduce the phenol content in waste water; stripping experiments in order to 9% NaOH solution as stripping agent, oil-water ratio of 4:1, stirring time 50min, continuous stripping stripping ten times the average rate of more than 99%, can be recovery of useful substances in water, to achieve the reuse of the organic phase, reducing the waste of resources. Then, after extraction of waste as raw materials, through the \%. The paper also resorcinol waste as raw materials, such as using FTIR analysis were characterized by means of waste and the waste of resource recovery for a reasonable analysis. Studies have shown that a small amount of waste 3,4 '- dihydroxybiphenyl, resorcinol, and some small amount of polyhydroxy polymer isomer, the main component of 2,3', 4 - trihydroxy biphenyl, representing residues more than 30% of the total. This thesis also uses the highest bid and toxic waste instead of phenol, developed a water-soluble phenolic resin adhesive. Laboratory study on the adhesive synthetic conditions were explored through materials, reaction temperature, reaction time and a series of single-factor test to determine the optimal synthesis conditions. The results show that the laboratory synthetic adhesive free formaldehyde content of less than 0.5%, solid content of about 36%, adhesion performance. The adhesive is simple, less production process, low production costs, there are some economic benefits and environmental benefits.
|