Fluent material handling – with receiver or receiver coacting mea – With testing or weighing receiver content
Reexamination Certificate
2005-06-28
2005-06-28
Douglas, Steven O. (Department: 3751)
Fluent material handling, with receiver or receiver coacting mea
With testing or weighing receiver content
C141S067000
Reexamination Certificate
active
06910511
ABSTRACT:
A subject for the invention is to stably supply an ambient gas having a given composition to a production apparatus or storage apparatus for a compound necessitating strict ambient gas regulation during the production, storage, or handling thereof, such as (meth)acrylic acid or an ester thereof which are easily polymerizable and form an explosive composition at ordinary temperature, in a manner not influenced by fluctuations in the amount of the gas used.In the invention, the pressure of the gas-phase part in a tank (1) or mixing vessel (2) is detected with a manometer (P-1) or (P-2), and a dry air
itrogen mixed gas is supplied to the tank (1) or mixing vessel (2) in an amount compensating for the gas consumption. The pressure in a mixed-gas supply piping (5) is detected with a manometer (P-5), and a dry air
itrogen mixed gas is supplied to the piping (5) in an amount compensating for the gas consumption. The degree of opening of a flow control valve (V-4) for nitrogen is regulated so as to be in proportion to the degree of opening of a flow control valve (V-3) for dry air. Thus, a mixed gas having a given oxygen concentration is supplied.
REFERENCES:
patent: 2001/0025120 (2001-09-01), Shingai et al.
patent: 49-95905 (1974-09-01), None
patent: 2000-256221 (2000-09-01), None
Goriki Masayasu
Yada Shuhei
Douglas Steven O.
Mitsubishi Chemical Corporation
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