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20151124 NL GUTS Presentations Crystallisation

Last updated 989 days ago by Albert Verver

Group of Users of Technology for Separation in the Netherlands




20151124 Esico B.V. – Mr Henk Pouwel –“Pastillating melted products: combining solidification with granulation”

The SME Esico specialises in granulating hot nd liquid products from food and chemical industry in form of flakes, granulates and pastilles. From melts by strand granulation, extruded or pelletised underwater or on an indirect belt cooler with chilled water. A unique specialty of Esico is the Esiform Pastillator to solidify elemental sulfur from the melt in uniform well flowing pastilles. Sulfur is heated to lquid state, fed to the inside of a horizontal rotating cylinder with accurate perfoaryins, through which the liquid sulfur is released on a continuous belt as uniform droplets that form uniform pellets after cooling on the belt. It was illustrated by excellent animations, design considerations and full scale equipment. www.esico.nl


20151124 Flowid B.V. – Mr. Kevin van Eeten - “Technoproject results: Benchmarking the SpinPro Extractor”

Suppose you use the high centrifugal and high turbulence Spinning Disk reactor principles as starting point for a new extractor in which three media the feed flow, the extractant and the extract are blended and separated in one step within a few seconds, would such device perform a well as or better than conventional extraction devices? In this Technoproject the SME Flowid bult the SpinPro Extractor and tested it together with NL GUTS members AkzoNobel and DSM. It is a three stage counter current extractor with centrifugal assisted separation and enhanced mass transfer from high shear and turbulence. First step: benchmark performance with standard media. Experiments organic phase water phase separation efficiency: levering very broad and pumping small operating window.
NTU at highest PSE = 6,6-17,8/m of axis depending on media; but very capable of dealing with asymmetrical flow rates while reaching complete separation. www.flowid.nl


20151124 Technical University Delft – Mr. Peter Daudey – “Towards Rigorous Control of Batch Crystallisation”

After a brief review of trends in crystallisation from a historical perspective concluding that industry is moving away from large crystallisation (except for pharma API) the outline and results of the ISPT project ‘Intelligent Observer and Control in Pharmaceutical Batch Crystallisation’ were reviewed. However with a more far stretching question: do we really control batch? The extensive experiments in real systems confirm OPC works well, RI is robust, for FTIR-ATR the PLS model should be simplified, Perdix microscope with image analysis is useful for seeding and Ultrasound spectrum works well up to 30% solids. Compiling all results demonstrate that full seeding does not work, controllability after adding seeds is poor, so in-batch control is hardly possible, but batch-to-batch iterative learning is more fruitful, secondary nucleation after partial seeding seems more promising and use a trigger to get it started. www.tud.nl www.ispt.eu


20151124 University Leuven (BE) - Mr. Tom van Gerven - “Ultrasound-enhanced crystallisation”

Ultrasound in liquids create cavities that generate extreme T and P conditions when collapsing causing intense shear forces that may result in pyrolysis, micro-mixing and destruction of boundary layers. With high speed camera’s KUL follows nucleation rate, crystal growth and size and shape of different US conditions. US reduces the metastable zone at nucleation and reduces the growth time with a much sharper detection point, but US formed radicals may also destroy the product crystals. Out of three, two theories (1. Bubble as nucleation centre–2. Flow induced nucleation) may explain certain features. US (Hz,W,T) affects crystal growth, morphology, crystal break-up (resonance). But US can also be used to control enantiomers, polymorphism. US and specifically pulsed US are promising as a non-contact actuators. https://cit.kuleuven.be/process/process_intensification


20151124 OLAM Cocoa (former ADM) – Mrs. Irene ter Laak – “Crystallisation of cocoa butter: getting glass and snap”

As a consequence of ADM selling its cocoa branch the Zaan factory is now OLAM Cocoa, that possesses a complete vertical industry from growing till raw chocolate products. De Zaan site has production and a technology centre. The complete process from cocoa to products (liquor, powder, butter) process was explained. Besides flavour and colour steered by alkalisation (current topic of R&D) and roasting, very important for chocolate quality is the ‘snap’, determined by the crystallisation and polymorphism properties of the (palmitic, stearic, oleic) fatty acids in the cocoa butter, that are formed in the tempering step, which is a sequence of melting, cooling, crystal forming, heating and cooling steps. For each client, Olam produces a specific raw chocolate. Their of confectionary specs do not necessarily correspond with the process specs, making processing skills crucial. The tour through the factory was very illustrative. www.olamgroup.com


20151124 Next Filtration (UK) - Mr. Mike Smethurst – ”Enhanced crystallisation through TAC”

Conventional ion exchange water softeners replace multivalent by monovalent ions to prevent scaling. The IX resins regeneration produces a slat rich eluate of which disposal become more and more problematic. Nanofiltration softening discharges quite a volume of good water. Template Assisted Crystallisation TAC uses polymer beads with functional groups that catalyse the formation of CaCO3 at the bead surface and release it as microscopic crystals to the bulk to stay as suspended CaCO3 and do not cause scaling.
The USA WateReuse Research Foundation tested TAC together with IX, EDI (both IX based) and two alternatives. TAC reduced scale by >90% getting close to the IX based and considerably better than the other two. Results were substantiated by chemical analysis, X-ray diffraction and heating coil elements observations. CAPEX is < 50% of IX; <25% of EDI; OPEX is < 20% of IX; < 25% of EDI. www.nextfiltration.co.uk  www.scalestop.co.uk  www.watereuse.org/foundation


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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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