SEPARATION OF AQUEOUS SOLUTIONS CONTAINING BETA-NAPHTHOL

JLTTPS

Abstract

The processes of separation of aqueous solutions are among the most complex processes in chemical technology. The multicomponent nature of aqueous solutions formed in chemical technology does not allow the development of a universal separation technology. For a chemical enterprise, clean water is an important natural resource, the quality of which determines the quality of products. The deterioration of the environmental situation, in particular with the extracted natural water, has led to the creation of water treatment lines at enterprises, which leads to additional production costs. The organization of a technological line for the separation of wastewater generated during the production process at a chemical enterprise will allow organizing a partially closed cycle for the water used, which will reduce the cost of pumping and water treatment of produced water and reduce the amount of wastewater discharged. The paper considers the process of separation of filtrates formed during the production of pigments - aqueous solutions, one of the components of which is beta-naphthol. The process of reverse osmosis separation carried out in production is characterized by the phenomenon of “contamination” of the membrane surface, which entails a decrease in the productivity of the installation. In the study, the nature of the “contamination” of the membrane surface was studied, the possibility of nanofiltration preliminary separation of aqueous solutions containing beta-naphthol was considered, experimental studies were carried out on the nanofiltration separation of the filtrate from the production of scarlet G pigment at various parameters of the separated solution. The results obtained showed the effectiveness of the nanofiltration separation of the studied solutions for the purpose of preliminary preparation before the subsequent reverse osmosis separation.