Halcon/Scientific Design

Activated alumina and phosphoric acid on a suitable support have become the choices for an iadustrial process. Ziac oxide with alumina has also been claimed to be a good catalyst. The actual mechanism of dehydration is not known. In iadustrial production, the ethylene yield is 94 to 99% of the theoretical value depending on the processiag scheme. Traces of aldehyde, acids, higher hydrocarbons, and carbon oxides, as well as water, have to be removed. Fixed-bed processes developed at the beginning of this century have been commercialized in many countries, and small-scale industries are still in operation in Brazil and India. New fluid-bed processes have been developed to reduce the plant investment and operating costs (102,103). Commercially available processes include the Lummus processes (fixed and fluidized-bed processes), Halcon/Scientific Design process, NIKK/JGC process, and the Petrobras process. In all these processes, typical ethylene yield is between 94 and 99%. 

Aniline can also be produced when phenol is subjected to gas-phase ammonolysis at 200 bar and 425°C in an adiabatic, fixed-bed reactor. This is the Halcon/Scientific Design process. The chemistry is ... 

This is the Halcon/Scientific Design process. The chemistry is ... 

Scientific Design A chemical engineering company, founded in New York in 1946 by R. Landau and H. Rehnberg. It developed many processes, of which the first and perhaps the best known was that for oxidizing ethylene to ethylene oxide, using a silver catalyst. Later it merged with Halcon Corporation, to become the Halcon SD Group. See Halcon, Oxirane. 

The peroxidation route to propylene oxide was discovered by Halcon International (Scientific Design) in the late 1960s and commercialized in a partnership with Atlantic Richfield Corp. (ARCO) in the 1970s. The chemistry... 

In 1962, researchers at Scientific Design discovered a direct oxidation reaction for making propylene oxide, which was then made by a variant of the chlorhydrin process. The new process involved the air oxidation of isobutene to -butylhydroperoxide, which in turn is used to oxidize propylene in the presence of a soluble molybdenum compound. The coproduct is f-butanol. To develop this process, Scientific Design reorganized to form Halcon International, a joint venture with Atlantic Richfield called Oxirane. The first plants were built in 1969... 

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