Continuous and high efficiency counter current extraction apparatus

Multistage Liquid Liquid Extraction (LLE) is a process where extraction steps are repeated in order to increase the recovery of a product. This process is required when, due to a small partition coefficient, the recovery in a single extraction step is insufficient.
In industrial applications, LLE is most often arranged with a "countercurrent scheme" (CC-LLE) that provides the smallest consumption of extractant. In this scheme, the aqueous raffinate from one stage is fed to a former stage as a feed while the organic phase is moved in the opposite direction. Hence, even if the recovery of product in each stage is small, the overall system can achieve a high level of recovery.
In other words, with multistage extraction, selectivity of the extraction and process yield are decoupled as the yield depends on the number of extraction stages used, thus providing greater freedom to the process developer.

Liquid liquid centrifugal separator is a new type, fast and highly efficient liquid-liquid extraction separation equipment, it is different with traditional extraction equipment such as mixer settler, extraction tower . Centrifugal extractor using the motor driven drum to reach high speed, the densities of different and not mutually mixed solution of two liquids in drum or blade rotation shear stress under complete mixing and mass transfer, and in high-speed rotation drum of centrifugal force under the action of rapid separation 

1. Mixed and mass transfer process

1. Simple and stable structure
Top-suspension structure, no bearing and mechanical seal at the bottom, no leakage risk, easy to maintain and save maintenance cost, long service life;
2. Energy-saving
Large capacity, more energy-saving (under the same capacity condition, the power consumption is 1/10-1/3 of the annular type);
3. Corrosion resistance
Equipment could adopt perfluoro polymer material, resistant to strong acid (hydrochloric acid, mixed acid etc.);
4. Good effect of mixing and separation
Various hybrid structures could be chosen, good separation effect, adapt to easily emulsified system;
5. Easy to change heavy phase weir
When changed liquid system, heavy phase weir could be replaced quickly, simple and easy operation;
6. Low liquid residual
Equipment with small valid volume;
7. High automation
It could realize timely monitoring on line, optional on-line cleaning system for GMP standard, and adapt to both intermittent and continuous running completely.

1. Equipment material will be chosen according dto the feed physico-chemical property, common used SS304/316L/904L, common composite material, fluoride material and so on;
2. Above table is general parameter, real device has a little devitation, please refter to the matched technological manual;
3. Above flux is under ideal condition, ratio of oil and water is their flux sum when 1:1.

1.Pharmaceutical Industry (Raw material of medicine, medical intermediate)
For example:
Raw material of medicine, reaction liquid of medical intermediate or solvent continuous extraction and washing; Organic phase and aqueous phase continuous separation; Natural medicine extraction(Such as artemisinin, caulis sinomenii, bilobalide and so on);
Antibiotics (Such as penicillin, lincomycin, gibberellin and so on);
Vitamin extraction (Such as pantolactone and so on).
2.Fine Chemicals/Petrochemical Industry
For example:
Chemical intermediate, raw liquid of pesticide and other reaction liquid and solvent continuous extraction and washing and so on,
Organic phase and aqueous phase continuous separation;
Lube oil purification and extraction, Diesel oil purification and extraction.
3.Food Fermentation Industry
For example:
Lactic acid fermentation broth extraction, Citric acid fermentation broth extraction, Natural plant pigment extraction (Such as chlorophyll) and so on.
4. Hydrometallurgy Industry
Chemical metal element extraction and separation (Such as Nickel, Cobalt, Copper, Zinc, Rubidium, Cesium, Manganese and so on);
Rare earth element separation and extraction;
Lithium and Boron extraction from Brine
5.Wastewater Treatment
For example:
Phenolic wastewater treatment, Printing and dying wastewater treatment(Such as H acid, K acid and so on), DMF wastewater treatment, Hight concentration chemical organic wastewater treatment, Naphthalene sulfonic acid wastewater treatment and so on.
6. Oil And Water Separation ( Both Include remove water from oil and remove oil from water).

CWL-M series Liquid liquid centrifugal separator released by zhengzhou tianyi extraction technology co.,ltd used for phenolic wastewater, and turning the waste into treasure. This series extractor is our the 4th product with our independent intellectual property rights, and patent number: ZL2014205865573. Under the same handling capacity, this series of machine energy consumption is 10%~30% of traditional annular type. At the same time, and it has short duration, split phase velocity, high extraction rate, save cost and solvent could be recycled and reused.

1. R&D, manufacture and sale on extraction and mixing equipment;
2. contraction on related supporting project, such as planning layout on extraction production line, installation and adjustion on extraction equipment, construction on related construction facilities.
3. Project test in every stage, such as lab-scale test, pilot test etc.

Liquid-liquid extraction is a powerful separation technique that falls right behind distillation in the hierarchy of separation methods.
If a separation can be made economically by distillation, there is no reason to consider extraction. However, in situations where distillation is not feasible for reasons such as a complex process sequence, high investment or operating costs, heat sensitive materials, or low volatility, extraction is often the best technology to use.

Such the flowing situation:
1. Separation not feasible by distillation slide
2. Break azeotropes
3. Energy requirements of distillation are prohibitive
4. A complex distillation sequence is required
5. The material is heat sensitive
6. The material is non-volatile

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