Multi-tube fixed-bed reactor, especially for catalytic gas...

Details Multi-tube fixed-bed reactor, especially for catalytic gas... Multi-tube fixed-bed reactor, especially for catalytic gas...

2007-06-05

2007-06-05

Kerns, Kevin P. (Department: 1725)

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Including heat exchanger for reaction chamber or reactants...

Reexamination Certificate

active

09936354

ABSTRACT:
A multitube fixed bed reactor and the use of such a reactor for carrying out catalytic gas-phase reactions, in particular for carrying out exothermic and endothermic catalytic gas-phase reactions such as the preparation of phthalic anhydride (PA), acrylic acid, methacrylic acid (MAA), acrolein, maleic anhydride (MA), glyoxal, phosgene, hydrocyanic acid or vinyl formamide (VFA). In a relatively large multitube reactor in which a large amount of heat of reaction is generated owing to the numerous catalyst tubes (17) and has to be removed, it is proposed that the ratio of tube spacing t to external tube diameter dabe made dependent on the reactor diameter or on the external tube bundle diameter dRBa. At an external diameter of the catalyst tube bundle (18) of more than 4 meters, a ratio of tube spacing d to external tube diameter daof at least 1.3 is preferred.

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