Crystallization

Safer and more sustainable

The IFC® technology avoids contacts between crystals and pumps or agitators built into the crystallizer without reducing or altering their circulation. At stake: a very significant reduction in the rate of failure and very streamlined maintenance transactions.

IFC® specifically meets the needs of markets:

• average size of larger crystals
• better distribution of size   

Crystals with larger sizes for maximum upgrading

IFC® ensures an average crystal size (D50) greater than that obtained by a crystallizer.

A high quality production through an excellent distribution of crystal size

The size distribution of the crystals obtained by crystallizing IFC® is close to the average size, the amount of fine is greatly reduced compared to other crystallization technologies.

The IFC® design allows a better control of secondary germination.

As such, the IFC® crystallizers guarantee a very high quality production, regular and simpler to develop in markets including the most demanding (pharmaceuticals, Chemicals, etc.).

A production of very reduced fine

IFC® produces less fines than other technologies in the market, from fines drying output is reduced. Typically, it is less than 3% against 10% for other technologies.

Energy efficiency

The IFC® technology provides crystal sizes equivalent or even higher to those produced by DTB crystallizer, but with a much lower energy consumption, in the case of a MVC / RMV unit.

IFC® in action

Several IFC® crystallizers were designed and launched in 2011.

• For the production of Na2SO4, installation performances reach a d50 greater than 400μm (against a d50 of 250µm on other technologies).
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• For the production of (NH4) 2SO4, the IFC® technology allows to obtain crystals with a d50 greater than 2 mm and a crystal distribution of 25%.
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Brochure

This fluidised bed crystalliser has a very large volume and provides large crystals, greater than 2 mm.

The crystals are fluidised at the bottom of the crystallizer using an external axial pump which contains the mother liquor in the upper part and resends them to the crystallizer.

The residence time may exceed 10 hours.

However, this powerful technology requires frequent cleaning.

The drill pipe crystallisers (DT and DTB) ensure the homogeneous mixture of the crystals in the crystallizer with an internal axial pump.

The energy provided by the pump is lesser than that deployed by a forced circulation, which significantly reduces attrition and breaking of crystals.

Crystal size may be greater than 2 mm and the residence time greater than 10 hours.

A surrounding decantation zone is often added to remove the fines and thereby increase the average size of the crystals.

Often used for relatively low flow rates, the method is not continuous but run in batch.

France Evaporation develops production processes on this technology and also more sophisticated units for research or tests on lower volumes.