Principle analysis of automatic liquid-liquid extraction

     一. Liquid-liquid extraction is one of the methods used to purify and purify compounds in organic chemistry laboratories. Through liquid-liquid extraction, the desired compound can be extracted from the liquid mixture.

    二. Principle: Using the difference of solubility or partition coefficient of compounds in two incompatible (or micro-volume) solvents, the compounds can be transferred from one solvent to another. After repeated extraction, most of the compounds were extracted.

    三.commonly used extractant: water, benzene, carbon tetrachloride, gasoline, YI ether, straight-run gasoline.

    四. Action process: The new closed silent clean air internal circulation oscillation principle and two-way gas-liquid mixing technology are adopted for liquid-liquid extraction pretreatment of oil, volatile phenol, anions and other items in laboratory water quality detection. The equipment displays and sets a number of extraction parameters through a large LCD touch screen to meet the extraction requirements of different samples. The experimental process needs no manual supervision, and the equipment realizes functions such as automatic extraction, automatic deflation, automatic collection, automatic drainage and automatic cleaning.

    五. Technical parameters and configuration:

    1. Extraction mode: closed internal circulation oscillation, automatic degassing during extraction.

    2. Sampling method: automatic high-precision metering sampling.

    3. Extraction rate: adjustable at will.

    4. Stratification mode: automatic extraction program operation, automatic static stratification, and manual drainage.

    5. Waste liquid treatment: waste is discharged automatically, and the waste liquid is filtered and adsorbed by activated carbon storage tank for centralized treatment.

    6. Gas treatment: automatic exhaust, and the waste gas is collected and treated centrally after being filtered and adsorbed by the filtering storage tank.