Prozessdetails
- Overview
- Inflow measurement of intermediate product MMP solution
- Inflow measurement of hydrogen cyanide solution
- Inflow measurement to primary hydantoin reactor
- Flow measurement of return circuit diluted brine to MMP washing tower
- Differential pressure measurement of MMP washing tower
- Temperature measurement in MMP washing tower
- Pressure measurement in MMP washing tower
- Differential pressure measurement of hydantoin-hydrolysis reactor cooling for monitoring heat exchanger
- Flow measurement of steam to hydantoin-hydrolysis
- Differential pressure measurement of methionine solution mixer for monitoring heat exchanger
- Level measurement reactor raw methionine solution
- Temperature measurement in the decarbonator
- Flow measurement of coolant
- Pressure measurement in the decarbonator
- Pressure measurement of methionine vacuum-crystallisation
- Differential pressure measurement of methionine vacuum filtration
- Level measurement of methionine vacuum-crystallisation
- Differential pressure measurement of vacuum washing tower
- Measurement of free chlorine inflow process water for vacuum washing tower
- Integrated control valve with flow, pressure and temperature measurement of water
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.
Anforderungen
- Minimaler Druckverlust durch optimierte Strömungsteiler
Empfohlene Produkte und Lösungen
Anforderungen
- Resistant against Hydrocyanic acid
- sanitay standards such as 3A or FDA
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- NACE certified (AMPP)
- Highest accuracy
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- Bulk measurement of brine
- Digital outouts and bus communication
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- Condition monitoring of washing tower
- Cost-saving installation without grounding rings
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- Reliable temperature control for optimised scrubbing
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- Process control
- Optimised washing equilibrium
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- Condition monitoring of heat exchanger
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- Accurate steam management
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Anforderungen
- Condition monitoring of heat exchanger
- Economical energy management
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- Suited for tanks with internals or stirred product surfaces
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- Accurate decarbonator control
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- Integrated energy calculator
- Heat balance with fast response
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- Process pressure measurement
- Temperature value via HART
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- Monitoring of vacuum
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- Condition monitoring of filtration
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- Suited for vacuum and tank internals like heating coils
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Anforderungen
- Condition monitoring of washing tower
- Contact free and flush mounted antenna
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Anforderungen
- pH-compensation
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Anforderungen
- No connection to a DCS necessary
- wide Cl-measuring-range