Description

Inflow measurement of intermediate product MMP solution

Requisitos para el punto de medición

  • Minimaler Druckverlust durch optimierte Strömungsteiler

Description

Inflow measurement of hydrogen cyanide solution

Requisitos para el punto de medición

  • Resistant against Hydrocyanic acid
  • sanitay standards such as 3A or FDA

Description

Inflow measurement to primary hydantoin reactor

Requisitos para el punto de medición

  • NACE certified (AMPP)
  • Highest accuracy

Description

Flow measurement of return circuit diluted brine to MMP washing tower

Requisitos para el punto de medición

  • Bulk measurement of brine
  • Digital outouts and bus communication

Description

Differential pressure measurement of MMP washing tower

Requisitos para el punto de medición

  • Condition monitoring of washing tower
  • Cost-saving installation without grounding rings

Description

Temperature measurement in MMP washing tower

Requisitos para el punto de medición

  • Reliable temperature control for optimised scrubbing

Description

Pressure measurement in MMP washing tower

Requisitos para el punto de medición

  • Process control
  • Optimised washing equilibrium

Description

Differential pressure measurement of hydantoin-hydrolysis reactor cooling for monitoring heat exchanger

Requisitos para el punto de medición

  • Condition monitoring of heat exchanger

Description

Flow measurement of steam to hydantoin-hydrolysis

Requisitos para el punto de medición

  • Accurate steam management

Description

Differential pressure measurement of methionine solution mixer for monitoring heat exchanger

Requisitos para el punto de medición

  • Condition monitoring of heat exchanger
  • Economical energy management

Description

Level measurement reactor raw methionine solution

Requisitos para el punto de medición

  • Suited for tanks with internals or stirred product surfaces

Description

Temperature measurement in the decarbonator

Requisitos para el punto de medición

  • Accurate decarbonator control

Description

Flow measurement of coolant

Requisitos para el punto de medición

  • Integrated energy calculator
  • Heat balance with fast response

Description

Pressure measurement in the decarbonator

Requisitos para el punto de medición

  • Process pressure measurement
  • Temperature value via HART

Description

Pressure measurement of methionine vacuum-crystallisation

Requisitos para el punto de medición

  • Monitoring of vacuum

Description

Differential pressure measurement of methionine vacuum filtration

Requisitos para el punto de medición

  • Condition monitoring of filtration

Description

Level measurement of methionine vacuum-crystallisation

Requisitos para el punto de medición

  • Suited for vacuum and tank internals like heating coils

Description

Differential pressure measurement of vacuum washing tower

Requisitos para el punto de medición

  • Condition monitoring of washing tower
  • Contact free and flush mounted antenna

Description

Measurement of free chlorine inflow process water for vacuum washing tower

Requisitos para el punto de medición

  • pH-compensation

Description

Integrated control valve with flow, pressure and temperature measurement of water

Requisitos para el punto de medición

  • No connection to a DCS necessary
  • wide Cl-measuring-range

Overview

Methionine production in the fine chemical process

Instrumentation ensured consistency in methionine quality

As natural feed components do not contain enough sulphurous amino acids (cysteine/cystine and methionine), synthetic methionine has become a key element of modern animal nutrition. Essential amino acid ensures that pigs, chickens etc. can make better use of their food. Nowadays, industrially manufactured DL-methionine is usually produced by chemical synthesis in the widely used carbonate-hydantoin process. The process can be roughly divided into four stages: hydantoin production, hydantoin hydrolysis, DL-methionine production and filtration and drying. Firstly, the basic substances (including acrolein) are prepared from raw petrochemical substances in preliminary processes. The subsequent hydantoin production in the primary reactor is based on the intermediate product methylmercapto propionaldehyde (MMP), which is converted to a hydantoin derivative with ammonia, carbon dioxide and hydrogen cyanide, the alkaline hydrolysis of which results in an alkaline salt of the methionine. The end product, methionine, is the result of neutralisation with an acid such as carbon dioxide.

The raw materials and intermediate products for the methionine process must be available in the right quantity and quality as the plant runs round the clock every day of the year. This must be systematically monitored, as must the other process steps in and around the hydantoin reactors, allowing for the hygiene requirements of the end product. KROHNE provides a wide range of measuring devices for applications in fine chemistry such as methionine, from Coriolis mass flowmeters for maximum performance requirements and accuracy and programmable high-performance temperature transmitters to differential pressure transmitters with integrated absolute pressure measurement. These are ideal for hydrostatic level, interface, density or complex differential pressure process applications.

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