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20161122 NL GUTS Presentations Crystallisation

Last updated 640 days ago by Albert Verver


NL GUTS Group of Users of Technology for Separation in the Netherlands




20161122 Lamp-ion B.V. – Mr. Martijn Wagterveld – “Morningstar crystals”

As a start-up company Lamp-ion builds upon its founder’s PhD work at Wetsus: the effect of sulphate on CaCO3 scaling in tubes, heat exchangers and membranes. He found that a new crystal is responsible for the type and extent of scaling. In fact sulphate reduces the scaling rate to even preventing precipitation in equipment by building an aragonite crystal in form of spikes on the normal vaterite scaling crystal creating a crystal that looks like a star. They called it Morning Star, never reported in literature before. He also found that the presence of magnesium is important to make this happen. With this knowledge water engineers have a tool in estimating scaling tendency of feed water.

Using his expertise Lamp-ion started to cooperate with another start-up WaterWaves B.V. to offer anti-scaling equipment based on ultrasound that disturbs the formation of scaling crystals and even removes existing scaling from for instance UV lamps. This enables bulk disinfection of otherwise scaling waters. The product is called Ultravibes. www.lamp-ion.nl   www.waterwaves.nl


20161122 PSEnterprise Ltd. (UK) – Mr. Sean Bermingham - “On the use of mechanistic crystallisation models to increase R&D efficiency, scale-up with reduced risk and debottleneck processes”

Modelling of crystallisation processes, although not easy, can be of great help to reduce the vast analytical and measuring work for developing and understanding the crystallisation process of many crystalline materials.

PSEnterprise, currently 140 personnel in six locations globally, uses its gCrystal model (as one of the g-series serving a number of industry branches) to assist operating companies with optimising industrial crystallisers, convert from batch to continuous, derive kinetics, train operators, improve process control, shorten research steps and reduce number of experiments. A number of very practical examples were given in which the model prediction was compared with measured outcomes to generate predictive behaviour for anti-solvent, batch to continuous, seeding, particle size distribution, scaling-up and down, reactor geometry and tracking the material structure across the system from reaction to application. www.psenterprise.com


20161122 SoliQz B.V. – Mr. Dirk Verdoes – “Overview of equipment and process development for the SoliQz Hydraulic Wash Column”

The Start-up SoliQz is a spin-off from TNO to commercialise the Hydraulic Wash Column HWC, developed about a decade back with only two industrial applications in spite of the advantages: the solvent is its own melt (so no other solvents, no energy consuming regeneration); the whole process in one simple column with good visual inspection and very pure product. An impure feed is cooled below its freezing point, where usually very pure crystals are formed while the impurities remain in the liquor. Using the melt of that same crystal as the liquor avoids another solvent to get rid of the impurities. Impure crystals are brought into the top of the wash column and are washed in counter current flow with the melt of the crystals that are formed below by cooling the down coming fluid.

The impure, the transition and the very pure product zones can be distinguished sharply. At the bottom part of the pure crystals are melted to serve as solvent to wash the crystals.

The HWC is complementary to the different crystallisation processes of Armstrong, the new parent of SoliQz. The scale-up philosophy is pragmatic. Several commercial units have been sold already. A sizeable pilot plant is located at PlantOne in Rotterdam. www.soliqz.com


20161122 Corbion Gorinchem - Mr. Sicco de Vos - “Aspects of crystallisation of PLA on industrial scale”

Polylactic acid PLA is a 100% bioplastic with increasing demand. Corbion will build a new 75.000 ton/annum plant in Thailand. PLA features < 1 kg CO2 / kg PLA, which is 3-8 times less than normal polymers, requires 1/3 of biomass per kg compared with BioPE.

It is versatile. To be versatile the crystalline properties have to be well controlled according to its application as fiber, extruded film, injection molded form, heat resistance, transparency etc. as homo- and copolymers. The melting point and thermal properties predominantly depend on the crystal composition and blend and on the crystallisation route.

De Vos presented how the different methods, crystallisers and process conditions result in different properties of PLA pellets to meet product specifications.



20161122 DSM – Mr. Geert van den Poel – “Crystallisation behaviour of engineering plastics in industrial application”

Van den Poel takes us with him along a journey in the different engineering plastics, especially polyamides their price performance ratios and the degree of crystallinity, all determined by client specifications and values and the use of Fast Scanning Calorimetry in mimicking process conditions to arrive at certain properties.

Key is measuring under realistic conditions. Examples were shown of the crystallisation degree and rate depending on its starting point (nucleated or non-nucleated, from the melt or from the glassy state and the cooling rate). Crystallisation is restricted to the temperature range between Tg of the amorphous phase and the equilibrium Tm of the crystal. Here is a distinct difference in bell shaped curves when coming from the hot or from the cold side, which is more pronounced at higher molecular weight. www.dsm.com


Copies of the presentations can be downloaded from the NL GUTS member site
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Visit the NL GUTS website www.processinnovation.nl/nlguts
For more information about NL GUTS please contact:
Jan Koning (chairman NL GUTS)
tel +32 473 976 135 - koning@trionpartners.nl
Bart Manders  (contact at RVO)
tel +31(0)88 602 2329 - bart.manders@rvo.nl


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