Presentation on theme: "Maleic Anhydride Plant"— Presentation transcript:
1 Maleic Anhydride Plant Please click on our logo or any link in this presentation to be redirected to our website, or other documentation.Thank You!17A Marlen Drive w Hamilton, NJ w USA Tel: (609) w Fax: (609)
2 General Overview Start Up: 1970 Shut Down: July 2007 Capacity: 15 kmta (starting with benzene)Technology: Benzene oxidation processUpgrades: € 8MM invested in 2000
3 General OverviewAccess to road and rail service with a harbor less than 100 km awayLarge quantity of new spare partsProcess equipment was cleaned with water and is currently being kept under a nitrogen padProcess area footprint is 100m by 50m and the highest structure is about 35m tallThere are no other chemical facilities located in the immediate area
4 General Overview Utilities Consumed: Raw Materials: ElectricityNatural GasWaterSteam (produced from the exothermic reaction)Benzene or ButaneAirVanadium CatalystConsumption Figures:Products Produced:1235kWh of electricity22.5kw of LNG9 tons of steam5.7m3 of demineralized water9.8kg of NitrogenMaleic AnhydrideProduction Figures:11.9 tons of steam750 kWh through a thermic fluid
5 Process Description Summary of Operations The plant produces 15 kmta of maleic anhydride starting with benzene due to a partnership with a neighboring coal processing plant which produced a benzols stream.This process of extracting benzols from the benzols stream has been removed from the site.The process currently uses benzene reacted with oxygen over a vandium catalyst to produce maleic anhydrideMaleic anhydride is a solid at room temperature, but the plant maintains the process temperature above the 40°C melting point to keep the product fluid. This process is very efficient regarding benzene conversion with only 2 ppm of residual benzene remaining (specification is 5 ppm).The reaction is highly exothermic, producing 60 kmta of 18 bar steam.The Gillendorf reactor runs at 4 bar pressure and is basically a large shell and tube exchanger with over 1,000 tubes packed with the vanadium catalyst.
6 Process Description Summary of Operations The oxygen is obtained from air, which is compressed to the reactor pressure of 4 bar with a large 40,000 m3/hr Brown Boveri-Sulzer centrifugal compressor with a 1,250 kw electric drive.The “100” section of the plant consists of the main reaction: oxidation of benzene. It also includes the condensation reaction and subsequent adsorption of the product into water with a packed tower.The “200” section of the plant is dehydration utilizing a 32m2 Luwa wiped film evaporator.The “300” section of the plant vacuum distills the crude Maleic Anhydride, removing residual impurities and residue. The vacuum is created by modern, liquid-ring vacuum pumps.The control system for the plant is a relatively new Foxboro DCS system with flat screen monitors.
7 Environmental, Health & Safety Process DescriptionUtilitiesA natural gas-fired hot oil furnace using Marlotherm as the heat exchange fluid is used for much of the process heating.The reactor is cooled with a molten salt system circulating 80 metric tons per hour of salt.There is a demineralized water system used in the adsorption process.The system produces a very high quality water product due to the requirements for process water in the plant.Environmental, Health & SafetyA stainless steel carbon bed vent adsorption system was installed in 2001 to remove all benzene and other hydrocarbons from the process vents.The final vent goes to the atmosphere, with a gas chromatograph on the vent stack to detect any residual hydrocarbons.