Chemical apparatus and process disinfecting – deodorizing – preser – Control element responsive to a sensed operating condition – Control element responds proportionally to a variable signal...
Reexamination Certificate
2004-12-01
2010-10-12
Griffin, Walter D (Department: 1797)
Chemical apparatus and process disinfecting, deodorizing, preser
Control element responsive to a sensed operating condition
Control element responds proportionally to a variable signal...
C422S201000
Reexamination Certificate
active
07811524
ABSTRACT:
A multi-tubular reaction apparatus, a control system, and a method are provided for controlling temperature change of a heat medium in the reaction apparatus, and quickly adjusting fluctuation in temperature, to thereby properly control a reaction. In particular, the apparatus and system apply to a catalytic gas-phase oxidation reaction such as in producing (meth)acrylic acid or the like. The reaction apparatus includes a multi-tubular reactor having a plurality of reaction tubes in a shell in which a heat medium circulates, and a heat medium cooling apparatus outside the reactor. The reaction apparatus includes a process for primarily cooling the heat medium taken out outside the shell, a process for secondarily cooling a part of the primarily cooled heat medium, and a line for enabling the secondarily cooled heat medium and the primarily cooled heat medium, which is not secondarily cooled, to circulate in the shell.
REFERENCES:
patent: 2098148 (1937-11-01), Jarl
patent: 3482948 (1969-12-01), Miegel
patent: 2004/0247500 (2004-12-01), Ashe et al.
patent: 54 21966 (1979-02-01), None
patent: 2001 280774 (2001-10-01), None
patent: 2004-26799 (2004-01-01), None
Jinno Kimikatsu
Kanamaru Takashi
Yada Shuhei
Cleveland Timothy
Griffin Walter D
Mitsubishi Chemical Corporation
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
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