Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – Including heat exchanger for reaction chamber or reactants...
Reexamination Certificate
2011-08-02
2011-08-02
Katakam, Sudhakar (Department: 1621)
Chemical apparatus and process disinfecting, deodorizing, preser
Chemical reactor
Including heat exchanger for reaction chamber or reactants...
C422S198000, C422S198000, C422S186220, C422S198000, C165S061000, C165S104320
Reexamination Certificate
active
07988927
ABSTRACT:
A method of varying the temperature of a tube bundle reactor for catalytic gas phase reactions upon start-up and shut-down, the tube bundle reactor comprising a major reactor portion which includes a bundle of vertically disposed reactor tubes, upper and lower tubesheets tightly connected to the upper and lower ends, respectively, of the reactor tubes, and a reactor shell enclosing the tube bundle, a heat transfer medium having a melting temperature in the range of from 100° C. to 450° C. flowing around the outer surfaces of the reactor tubes during normal operation and being circulated in at least one circuit through the major reactor portion, comprising the steps: (a) varying the heat transfer medium temperature during circulation of the heat transfer medium; and (b) passing a temperature gas through the reactor tubes at least when the heat transfer medium is not yet or no longer circulated.
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European Search Report; Application No. EP07014486; dated Jan. 21, 2010; 4 pages.
Dachs Josef
Lehr Manfred
Schuster Wolfgang
Katakam Sudhakar
MAN DWE GmbH
Thomas & Karceski, P.C.
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