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  • pH Control in Ethylene Quenching
    In the production of olefins, naphtha or natural gas feedstock is steam cracked at high temperatures in a cracking furnace. This sets off a variety of reactions which are brought to a halt by quenching the produced gas mixture with water. The mixture, containing approximately 38 % ethylene
  • Specific Ethylene Oxide Analyzer
    HNU Systems, Inc. introduced its first ETO Analyzer (Model 301D), in 1984 for area monitoring of toxic gases including ethylene oxide in hospitals and at medical device manufacturers where smaller area monitoring systems were needed. More than 300 of these systems were sold. As a result
  • Effect of surface phosphorus on the oxidative dehydrogenation of ethane to ethylene
    Scientists from Accelrys, Akzo-Nobel, and Sandia National Laboratories, have used the DFT code DMol to carry out an extensive investigation of the full oxidative dehydrogenation cycle of ethane to ethylene on a SiO The results obtained from the simulations will enable a better understanding
  • Bonding in Poly(ethylene-oxide)-Water Systems
    Centro de Quimica IVIC, Venezuela Los Alamos National Laboratory, USA Researchers at IVIC-Venezuela, Kraft Foods, USA, and the Los Alamos National Laboratory, USA, have used computational techniques to investigate the bonding in poly(ethylene-oxide) - water systems, an important component
  • Protecting Ethylene Process Facilities: A Review of Gas Detection Methods
    Driven largely by increased global shale gas production, North American ethylene producers have become more profitable, with cost. positions that approach those of the Middle East's lowest cost producers. As ethane prices have decreased relative to that of naphtha. within the last ten years
  • Ethylene: Diethylene Glycols On-Line Monitoring with a ClearView TM Photometer
    To replace a gas chromatograph (GC) by continuously measuring the amount of ethylene glycol in diethylene glycol using a near infrared (NIR) ClearView TM fiber optic filter photometer. Background: It is not obvious, even to many NIR practitioners, that NIR can make more subtle distinctions among
  • DOWTHERM vs. DOWFROST: A Comparison of Ethylene Glycol and Propylene Glycol (.pdf)
    Dow offers two basic types of low temperature heat transfer fluids: DOWTHERM* heat transfer fluids based on ethylene glycol (EG) and DOWFROST* heat transfer fluids based on propylene glycol (PG). Both types also contain water and corrosion inhibitors. In terms of performance, both fluids are very
  • Photoacoustic Monitor Helps BASF Manage Ethylene Oxide Levels
    BASF Corp.'s Geismar Louisiana Facility needed to monitor ethylene oxide levels from 19 remote sampling points around the plant to ensure compliance with the OSHA 8 hour TWA exposure limit of 1 ppmv and check for leaks and process upsets. A sampling and measurement system comprised of an Innova
  • Water in Ethylene Glycol Online Monitoring with a Clear View Photometer
    Purpose: To determine water content in ethylene glycol (EG) without sample temperature control. Experimental: Our PS-2E NIR diode array spectrometer was used to measure the NIR spectra of 0 to 6% water in EG in the 25 to 35 °C temperature range using a 2 mm cuvette in our HeaterCell TM fiber optic
  • Phase Behavior of Blends Containing Poly(resorcinol phthalate-block-carbonate) and Poly(ethylene terephthalate) (.pdf)
    Polymer blends provide an efficient way of making new materials with improved properties. The miscibility of poly(resorcinol phthalate-block-carbonate)(RPC) and poly(ethylene terephthalate )(PET) blends is examined by differential scanning calorimetry and dynamical mechanical analysis. When

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