Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1980-03-14
1981-04-21
Jiles, Henry R.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
C07D30760
Patent
active
042632110
ABSTRACT:
An improved process is provided for the recovery and storage of maleic anhydride from maleic anhydride-containing gases. Such gases are scrubbed with a water or maleic acid scrubbing solution in a scrubbing zone to form a maleic acid-containing solution. This maleic acid-containing solution is then concentrated and dehydrated in an evaporation zone and a dehydration zone, respectively, to form maleic anhydride. The maleic anhydride so formed is then purified by distillation in a distillation zone. The evaporation, dehydration, and distillation steps are all carried out under a vacuum maintained by withdrawing gases containing organic and water vapor from said evaporation, dehydration and distillation zones using jet pumps propelled by pressurized air. The vapor-containing gases so removed are admixed with the pressurized air pump propellant streams, and this mixture is then introduced into the scrubbing zone for the maleic anhydride-containing gases. Vapor-containing gases may also be sucked by the jet pumps from maleic anhydride storage vessels, and such vapor-containing gases may also then be introduced into the scrubbing zone.
REFERENCES:
patent: 3865849 (1973-02-01), Garkisch et al.
Keunecke Gerhard
Klopfer Anton
Krimphove Herbert
Sterck Lothar
Davy International Aktiengesellschaft
Dentz Bernard
Jiles Henry R.
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