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Our Complete range of products are Liquid Extraction and Solid-Liquid Extraction System.
TheLiquid-Liquid Extraction allows liquid mixtures to be separated using liquid-liquid extraction. The liquid mixture to be separated is delivered from the feed tank into the bottom of the extraction column using a gear pump. There, it moves in countercurrent towards the solvent, which is delivered into the top of the packed column by a diaphragm pump. The mixture to be separated is made up of a transition component and carrier liquid. The carrier liquid and the solvent are insoluble in one another and therefore a phase boundary is established in the column. This can be adjusted using two regulating valves. The movement of the transition component from the carrier liquid into the solvent occurs inside the packed column. Two three-way valves can be used to operate the system as a closed or an open process. To obtain the transition component and allow reuse of the solvent, the extract can be processed using a distillation unit. This consists of a round-bottomed flask with a packed column and a distillation bridge with Liebig condenser. A hemispherical heating mantle is used to heat the bottom product in the round-bottomed flask. The bottom temperature is measured by a sensor, displayed digitally and controlled using a PID controller. The temperature at the top of the distillation column is also measured. Distillation removes the solvent from the transition component which is collected at the bottom of the unit and can be drawn off as a product. The distilled solvent is collected in a tank and can be reused in the extraction process. For a ternary material system, boiling petrol is recommended as the carrier liquid with benzoic acid as the transition component and distilled water as the solvent. A pH and conductivity meter is included to monitor the efficiency of the separating process.
The Solid-Liquid Extractionallows a soluble component of a solid mixture to be extracted. In continuous three-stage mode, pure solvent (water) is delivered from a tank to the nozzle of the first extraction stage where it is distributed over the extraction material. The solvent seeps through the extraction material, takes up the soluble components and passes into the collecting segment. From here, the enriched solvent is delivered to the nozzle of the next stage. After passing through the last stage, the solvent charged with the extracted component is collected in the extract tank. The extraction material (potassium bicarbonate with special carrier material) is continuously fed into the cells of the rotating extractor by a feed mechanism. The extraction material and solvent move in countercurrent and the depleted extraction residue falls into a tank after one rotation of the extractor. Valves can be used to switch to 1 or 2-stage continuous mode. Discontinuous mode is possible with the carousel stopped. Three pumps are available for delivering the solvent, their speed can be individually adjusted for each stage. The solvent temperature at each level is adjusted by a PID controller and displayed. Each stage is equipped with conductivity sensors to monitor the separation process. Relevant experimental parameters are recorded by sensors, displayed digitally and can be processed onto a PC. The well-structured instructional material sets out the technological fundamentals and provides a step-by-step guide through the measurements and experiments.
Rakesh Mittal (Elab Engineering)
F-197/A, ALPHA-2 GREATER NOIDA Gautam Budh Nagar, Uttar Pradesh - 201308, India
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