Polymerization monitoring Inline analytical technology for • monomer concentration • polymer concentration • degree of polymerization • polymerization brea

Increase quality, save resources: LiquiSonic®. With high-quality, innovative sensor technology. Robust, precise, user-friendly. LiquiSonic® LiquiSonic® is an inline analytical system for determining the concentration in liquids directly in the production process. The analyzer is also used for phase separation and reaction monitoring. Sensor installation within the product stream means an extremely fast measurement that responds immediately to process changes. User benefits include: • optimal plant control through online and real-time information about process states • maximized process efficiency...

Inline process analysis Content LiquiSonic®2 Fundamentals of polymerization

Fundamentals of polymerization Introduction In connection with the need to closely monitor and control processes, the capability to determine conversion in chemical reactions in general and in particular in polymerization reactions is of outstanding significance. Just like concentration measurements, conversion measurements are becoming more and more important in all branches of industry on account of their impact on the efficiency of processes, their potential for material and energy savings, quality improvements as well as for environmental reasons. For measuring concentrations and conversion,...

Processes Depending on the reaction mechanism the polymerizations are divided into: • • • • solvent polymerization emulsion polymerization suspension polymerization polycondensation The following description explains this as an example for the emulsion polymerization of styrene butadiene latex. The determination of parameters like concentration, degree of polymerization etc. occurs analog in other polymerization types. Emulsion polymerization of styrene-butadiene-latex Depending on the number of copolymers and the product changing additives, the change of sonic velocity shows a characteristic...

The sonic velocity and the concentration are linked to each other. Furthermore, the degree of polymerization reflecting the share of polymer in monomer correlates with the concentration. With ultrasonic measurement systems, it is possible to determine the concentration and the degree of polymerization. The following diagram describes this relationship during a polymerization of butadiene-styrene. In case of emulsion polymerization of butadiene and styrene, the degree of polymerization can be determined with an accuracy of 0.1 %. Variation of sonic velocity, concentration and degree of polymerization...

Applications Our knowledge in the field of polymerization acquired by numerous applications at the customer and by in-house technology is the result of varied experiences over 20 years. This knowledge is integrated into new projects by always handling customer data as confidential. In polymerizations, not only polymers are the focus of monitoring, but also a number of monomers, additives and solvents as well as recovery processes. SensoTech offers the following secondary literature to different production processes: • optimization of polyamide production • optimization of polyurethane production...

Application example Caprolactam production Polyamides are among the most common thermoplastic synthetic materials. Caprolactam (CPL) is the main raw material for these polymers, especially for PA6 (nylon 6). The monomer caprolactam is produced in a complex process, consisting of 4 main parts: • • • • synthesis of raw caprolactam separation and crystallization of ammoniumsulphate purification and preparation of raw caprolactam polymerisation of polycaprolactam (PA6) The raw caprolactam production is based on the key intermediate cyclohexanone oxime, which is usually made by cyclohexanone, hydroxylamine...

The LiquiSonic® analyzer provides a precise caprolactam concentration measurement with real-time monitoring. The devise is successfully implemented for phase separation between caprolactam and ammonium sulphate. The LiquiSonic® immersion sensor is easily installed into the feed and transport pipelines. Installing the LiquiSonic® sensor eliminates dead space and avoids high installation costs for bypasses. The robust sensor construction and the optional special materials, like HC 2000 oder PFA, promote long process life. In addition, SensoTech offers sensors approved by ATEX, IECEx and FM. By...

Quality and Support Enthusiasm for technical progress is the driving force behind our company as we seek to shape the market of tomorrow. As our customer you are at the center of all our efforts and we are committed to serving you with maximum efficiency. We work closely with you to develop innovative solutions for your measurement challenges and individual system requirements. The growing complexity of application-specific requirements means it is essential to have an understanding of the relationships and interactions involved. Creative research is another pillar of our company. The specialists...

In liquids, we set the measure. With innovative sensor technology. Tough, accurate, user-friendly. SensoTech SensoTech is a provider of systems for the analysis and optimization of process liquids. Since our establishment in 1990, we have developed into a leading supplier of process analyzers for the inline measurement of liquid concentration and density. Our analytical systems set benchmarks that are used globally. Manufactured in Germany, the main principle of our innovative systems is to measure ultrasonic velocity in continuous processes. We have perfected this method into an extremely precise...

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