Description

Level measurement of methane reservoir

Requirements

  • Installation on magnetic level indicators (MLI) or in bypass chambers
  • Ceramic process seal system for demanding process conditions

Description

Level measurement in olefin pre-treatment

Requirements

  • Overfilling prevention
  • Tank internal reflections can be eliminated
  • SIL 2/3 certified

Description

Temperature measurement in olefin pretreatment as well as in the alkylate reactor and distillator

Requirements

  • Chemically resistant PTFE
  • Connection heads available up to IP68

Description

Process pressure measurement

Requirements

  • Process pressure control

Description

Level measurement in sulphuric acid reservoir

Requirements

  • Second sealing made of METAGLAS
  • Antenna extensions up to 1 m

Description

Inflow measurement of sulphuric acid

Requirements

  • High accuracy mass, density and volume flow measurement (±0.1% of MV)
  • Drainable thanks to single straight tube design

Description

Reactor pressure measurement

Requirements

  • Pressure control reactor

Description

Level measurement of separator

Requirements

  • Reversed interface measurement
  • Horizontal or vertical housing to suit every installation

Description

Differential pressure measurement in section of fractionation column

Requirements

  • Differential pressure via packings

Description

Fraction column head pressure measurement

Requirements

  • Process pressure control

Description

Level measurement in distillation plant

Requirements

  • Installation in bypass chamber
  • Available as compact version or with remote converter

Description

Flow measurement of extracted alkylate

Requirements

  • Maintains operation over a wide range of gas fractions
  • High capacity bulk measurement

Description

Conductive conductivity measurement in coolant circuit

Requirements

  • Monitoring of cooling water quality
  • Integrated temperature sensor and standard VP2 connector

Description

Level measurement in coolant supply

Requirements

  • Intuitive quick setup procedure
  • Probe lengths can be customised on site

Description

Cooling water DP level measurement

Requirements

  • Level control

Description

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

Requirements

  • Cooling water management
  • local control/ separate DCS not necessary

Overview

Olefin processing in the organic chemical process

Instrumentation ensuring high purity levels in ethylene and propylene outputs

In petrochemistry, excess hydrocarbon gases can be profitably turned into high-quality alkylate petrol through refinement and cracking – for use for example in modern engines. The first part of the procedure involves isomerising the n-butane (alkane) by dehydrogenation. This creates an approx. 50/50 mixture of isobutane and isobutylene, which is further processed by way of olefin pretreatment, followed by an alkylation process, through which the gaseous olefins are obtained catalytically using concentrated sulphuric acid or fluoric acid at low temperatures. Downstream treatment of the process cooling water takes place outside of the explosive area. Compared to direct alkylation of isobutylene, this technology offers cost advantages to the operator, as the output of alkylate petrol is doubled. Moreover, as the supply of butane is increasing across the globe, it is often worthwhile for operators to convert their existing MTBE plants to this type of process.

Thanks to many years of experience in the area of petrochemistry, KROHNE has a wide range of suitable measuring equipment for use in piping and tanks for oil and gas applications. This includes, for example, flowmeters and level transmitters for use in explosive areas in processes involving hydrocarbons, as well as corrosive liquids such as sulphuric acid. Our level transmitters allow continuous, non-contact measurement in both very small and very large storage and process tanks – even at difficult to access measuring points. Conductivity sensors (both conductive and inductive) and sensors for other water parameters complete the extensive range for cooling water treatment in olefin processing.

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