Reactor for catalytic gas phase oxidation
AssigneeNippon Shokubai Co., Ltd.
InventorsYukihiro Matsumoto, Masakatsu Mori, Masatsuga Kitaura, Osamu Dodo, Michio Tanimoto
Life of this patent
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Abstract
The temperature distribution of a heating medium in the reactor is allayed and the occurrence of hot spots is repressed. In a shell-and-tube type reactor provided with donut type and disc type baffle plates, reaction tubes are disposed even in the holes formed in the donut type baffle plates and an empty space devoid of a configuration of the reaction tubes is formed at the center of the shell. According to this invention, (meth)acrylic acid and/or (meth)acrolein can be produced at a low energy by catalytic gas phase oxidation of propylene- or isobutylene-containing gas.
Claims18
A shell-and-tube type reactor, comprising:
- a cylindrical shell having disposed on the periphery thereof a plurality of annular conduits for guiding a heating medium in or out in the radial direction and having a raw material inlet and a product outlet;
- a circulation device for mutually connecting a plurality of annular conduits;
- a plurality of reaction tubes constrained to the reactor by a plurality of tube sheets;
- donut type baffle plates and disc type baffle plates disposed in the longitudinal direction of the reaction tubes and adapted to vary the direction of the heating medium introduced into the shell;
- said reaction tubes being restrained at center distances 1.2-1.4 times the outside diameter of the reaction tube;
- an empty space devoid of a configuration of the reaction tubes at a center of the shell;
- said reaction tubes unsupported by the donut type baffle plate in the center hole side;
- and
- a gas discharge conduit discharging a gas accumulated in the shell.
A shell-and-tube type reactor comprising:
- a cylindrical shell having disposed on the periphery thereof a plurality of annular conduits for guiding a heating medium in or out in the radial direction and having a raw material inlet and a product outlet;
- a circulation device for mutually connecting a plurality of annular conduits;
- a plurality of reaction tubes constrained to the reactor by a plurality of tube sheets;
- donut type baffle plates and disc type baffle plates disposed in the longitudinal direction of the reaction tubes and adapted to vary the direction of the heating medium introduced into the shell;
- said reaction tubes being restrained at center distances 1.2-1.4 times the outside diameter of the reaction tube;
- an empty space devoid of a configuration of the reaction tubes at a center of the shell;
- said reaction tubes unsupported by the donut type baffle plate in the center hole side;
- and
- a plurality of opening rows for allowing the heating medium to pass, an width B of the opening being in the range of 5 to 50% based on the center distance, and a ration of opening length C/opening width B being in the range of 0.2 to 20.
Dependencies are inferred from the claim text.