LDPE (low density polyethylene) grafting maleic anhydride waste water resourcelization recycling method

Abstract

The invention relates to an LDPE (low density polyethylene) grafting maleic anhydride waste water resourcelization recycling method which comprises the following steps: step 1, adopting LDPE grafting maleic anhydride waste water, adding solvent dimethyl benzene and LDPE powder in the waste water, and under the condition of backflow condensation, heating and stirring uniformly to obtain premixed liquid; step 2, adding MAH, surface-active agent and dispersing agent in the premixed liquid, heating and stirring uniformly to obtain reaction liquid; transfering the reaction liquid to a reaction vessel; step 3, heating and stirring the reaction liquid, then adding dimethyl benzene solution containing BPO in the reaction liquid, and heating continuously and stirring for reaction; step 4, stopping heating, stirring the reaction liquid, cooling and performing suction filtration to the reaction liquid to obtain solid, and washing and drying the solid to obtain powder; and step 5, adding acetone extractant into the powder, performing extraction in a soxhlet extractor, drying to constant weight, and then obtaining recycling reaction products. The method has the advantage that unreacted effective components in waste water can be fully utilized, so that the utilization ratio of raw materials and water resource can be improved.

Description

technical field [0001] The invention relates to a waste water recycling method grafted with low-density polyethylene with maleic anhydride, and belongs to the technical field of waste water recycling. Background technique [0002] Water is a necessary condition for the survival and development of human beings. With the development of industrial production, the growth of population and other factors, the consumption of water resources is increasing year by year. Due to drought, water pollution and the distribution of water resources in time and region Due to inequality, the contradiction between supply and demand of water resources is intensifying. my country is one of the countries with the poorest per capita water resources in the world. In addition, my country has a large population and the distribution of water resources is seriously uneven. Water shortages have occurred in 1 / 3 of the large and medium-sized cities and some areas in the country. At the same time, the wanto...

AI Technical Summary

Problems solved by technology

The amount of grafted monomer MAH is relatively large, but the percentage of the amount of MAH grafted onto LDPE to the total amount of MAH in the input reaction system is very low. Usually, the utilization rate of MAH is less than 5%. If this type of waste water is directly discharged, it will It causes waste of effective resources in wastewater, so the research on the reuse of MAH in this type of wastewater has important practical significance

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