Description

Flow measurement of contaminants when purging volatile organic compounds/VOC

Besoins pour ce point de mesure

  • Optional stainless steel housing for corrosive atmospheres
  • Measurement possible without auxiliary power supply

Description

Flow measurement of recycled butadiene

Besoins pour ce point de mesure

  • High accuracy (±0.05% flat) as well as wide choice of temperature range (-200…+400°C / -328…+752°F)
  • High pressure ratings optional up to max. 200 barg/ 2900 psig

Description

Conductive conductivity measurement of inflow of demineralised water

Besoins pour ce point de mesure

  • No external transmitter needed
  • With PEEK body material
  • With graphite electrodes and Pt1000 for temperature compensation

Description

Level measurement of polymerisation reactors

Besoins pour ce point de mesure

  • PTFE Lens antennas (no tank intrusion), insensitive to deposit
  • For demanding liquid applications involving narrow tanks and internal obstructions

Description

Flow measurement of unconverted butadiene

Besoins pour ce point de mesure

  • Process pressure after compressor
  • Process control

Description

Pressure measurement of vacuum tank for recovery of butadiene

Besoins pour ce point de mesure

  • Tank vacuum measurement
  • Control of vacuum pump

Description

Flow measurement of steam to latex stripping column

Besoins pour ce point de mesure

  • Flange or space-saving sandwich (wafer) version
  • For liquids, (wet) gases, saturated and superheated steam

Description

Flow measurement of recycled filtrate from shaker screen

Besoins pour ce point de mesure

  • High accuracy (±0.05% flat)
  • Accurate density and mass load

Description

pH-value measurement in the coagulation tank

Besoins pour ce point de mesure

  • Monitoring of pH-adjustment processes
  • Various mounting assemblies for easy installation

Description

MIN/MAX detection of level in coagulation tank

Besoins pour ce point de mesure

  • Extra safe with second process seal (ceramic)
  • Unaffected by dielectrics, density or turbulences

Description

Dosing of acid into the coagulation tank

Besoins pour ce point de mesure

  • High measuring accuracy fro coagulation control
  • Integrated conductivity measurement / acid quality monitoring

Description

pH-value measurement in the leach tank

Besoins pour ce point de mesure

  • Direct connection via standardized fieldbus (HART® 7)
  • Polymer electrolyte with high proportion of KCl for long durability

Overview

Synthetic rubber production in plastics & polymers production

Advanced Instrumentation and Sensors for Monitoring and Ensure Process Control

Styrene butadiene rubber (SBR) is by far the most manufactured variant of synthetic rubber. This elastic polymer is processed in the automotive industry as the basis for vehicle tyres, seals and conveyor belts. Industrial manufacture of synthetic rubber is based on the starting substances styrene and butadiene obtained from crude oil and natural gas. These two chemicals, together with a catalyst, a soap solution as emulsifier and recovered butadiene plus styrene, end up in the reactors, where the actual polymerisation occurs. As this is typically only supposed to run up to approx. 70%, a short-stop phase is included downstream, where various additives can be removed from the polymer. Any unconverted butadiene and styrene are then recovered for recycling and pumped back into the storage tanks. In the next stage, if required, stripped latex is gathered for mixing. The latex is then coagulated, converted to granules, sieved, washed and filtered. At the end, excess water is removed and the crumbs are dried with hot air. In the follow-up process, the SBR, which is still in liquid form, is cured by vulcanisation and is thus given its final shape.

Based on its many years of expertise in the area of polymer chemistry, KROHNE offers top class measuring technology for this sector. Our Coriolis mass flowmeters for the process industry can even measure uninterruptedly with a gas content of up to 100%. The measuring systems offer various digital communication options. For example, loop-powered 2-wire sensors for conductive conductivity measurement allow the sensor to be connected directly to the process control system without the need for a separate "amplifier", i.e. signal converter. And there is electronic equipment and additional application diagnostics available to increase the process reliability of our sturdy, all-metal variable area flowmeters, for example, by identifying a float blockage caused by contaminants.

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