Presentation on theme: "Maleic Anhydride Plant"— Presentation transcript:
1Maleic 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)
2General Overview Start Up: 1970 Shut Down: July 2007 Capacity: 15 kmta (starting with benzene)Technology: Benzene oxidation processUpgrades: € 8MM invested in 2000
3General 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
4General 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
5Process 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.
6Process 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.
7Environmental, 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.