COMPANY INTRODUCTION

Liquid-liquid extraction is a powerful separation technique that falls right behind distillation in the hierarchy of separation methods (see figure on the right).

Reasons to use extraction:

• Separation not feasible by distillation slide

• Break azeotropes

• Energy requirements of distillation are prohibitive

• A complex distillation sequence is required

• The material is heat sensitive

• The material is non-volatile

Centrifugal extractor is a new type of liquid-liquid extraction and separation equipment, with fast and efficient advantages, it has essential difference in principle with traditional extraction equipments such as mixer settler, extraction column and so on. Centrifugal extractor adopt   motor to drive the drum with high-speed rotation, under the shear force generated by drum or blade rotation condition, two different density and immiscible liquids complete mixing and mass transfer, and separated rapidly under the centrifugal force action which generated by high-speed rotation of drum.

Mixing and mass transfer process

Light and heavy phases of solution enter in the internal mixing zone of shell from two feed inlets separately in a certain ratio, mixed and separated rapidly, to complete mixing and mass transfer process.

Separation process

Under the action of the feeder or turbine disc, the mixed liquor enter in drum, in the cavity formed by web, it soon rotated with drum synchronously, under the condition of centrifugal force, during the upward flow process, the heavier liquid flow   away from the drum center and towards to the drum wall, while the lighter liquid flow    away from the drum wall and towards to the drum center, clarified liquids enter in collecting chamber through their respective weirs and discharged from light and heavy phase outlets, to complete separation process.

 Features of centrifugal extractor

1. Simple and stable structure

Top-suspension structure, there is no bottom bearing and mechanical seal in the process area, no leakage risk, easy to maintain and save maintenance cost, long service life;

2. Energy-saving

Large capacity, more energy-saving (at the same capacity condition, the power consumption is 1/10~1/3 of traditional annular type;

3. Corrosion resistance

Equipment could adopt perfluoro polymer material, resistant to strong acid(hydrochloric acid, mixed acid etc.) and some organic solvent;

4. Good separation effect

Many mixed structures for choose, it could use in easily emulsified system;

5. Easy to change parts

No need to dismantle machine when changed heavy phase parts, simple and easy, reduce labor intensity;

6. Less residual

Equipment with small valid volume, liquid has a short residence time, it could realize heavy phase or light phase internal recycling.

7. High automation

It could realize timely monitoring on-line; it could choose on-line cleaning system to meet GMP standard, and applied intermittent and continuous running completely;

Application fields

1.       Wastewater treatment (such as phenolic wastewater treatment, waste acid water treatment);

2.       Pharmaceutical industry (such as preparation of pharmaceutical intermediates, Chinese medicine purification);

3.       Hydrometallurgy industry (such as copper, vanadium, nickel, rare earth elements and so many elements’ extraction and separation);

4.       Food industry (such as food pigment, additive, lactic acid, citric acid and other extraction or separation);

5.       Fine chemicals (such as spice extraction, raw material of cosmetics extraction, vanillin extraction);

6.       Oil-water separation (such as remove water from crude oil/heavy oil/diesel and so on);

7.       Nuclear industry (such as uranium extraction)