Method for separating and recovering nitro chlorobenzene from wastewater by using silanization modified zeolite

Abstract

Disclosed is an absorption, separation and recycle techonoly with high efficiency and low energy cost, which can separate and recycle with high purity from organic waste water containing isomer of chloronitrobenzene whose characters are close, and has wide application in the future. The invention uses chloronitrobenzene and resource recycling method in water by zeolite having been processed by silane decorated by silane, which is transmitting the organic waste water containing isomer of chloronitrobenzene to be processed to the absorbing container of HZSM-5 zeolite decorated by silane to be absorbed, and the conditions are: the diameter of HZSM-5 zeolite particle decorated by silane is 1-25mu m, the original density ratio of in waste water is 1-5:1, the mass ratio of before absorption and zeolite after decorction is 0.02-0.12, the vibration speed of ratation is 80-200r / m, the temperature range is 275-350K and the time for absorption is 15s-48h. The invention has low cost and wide application in the future.

Description

technical field

[0001] The invention relates to a method for selectively adsorbing and separating nitrochlorobenzene from organic waste water containing isomers of o-nitrochlorobenzene and p-nitrochlorobenzene, especially using a silanized HZSM- 5 Zeolite is a method for adsorbing and separating high-purity p-nitrochlorobenzene and o-nitrochlorobenzene from wastewater containing nitrochlorobenzene isomers. Background technique

[0002] The treatment of organic chemical wastewater mainly includes biological methods and physical and chemical methods. Due to the high toxicity and stability of organic matter in wastewater, it is difficult to obtain ideal results by using a single biological method to treat wastewater; although advanced oxidation technology can be used to treat organic wastewater to varying degrees It can effectively degrade pollutants in water bodies, but it is not economical. Adsorption recovery technology is increasingly favored by people because it realizes ...