Distillation: apparatus – Apparatus – Systems
Patent
1983-08-12
1987-04-21
Lacey, David L.
Distillation: apparatus
Apparatus
Systems
202183, 202186, 202236, 203 42, 203 87, 159 132, B01D 302
Patent
active
046594337
ABSTRACT:
Apparatus for concentrating and dehydrating maleic acid to form maleic anhydride, comprising: at least a first and a second vertical, independent and distinct, falling thin-film, multitubular evaporators of the static type arranged in series, wherein the first thin-film multitubular evaporator of the static type has an upper part and a lower part and includes a feedpipe at the upper part and a discharge pipe at the lower part; a separator connected by its sidewall to the discharge pipe from the first evaporator and including a first discharge pipe at the upper portion thereof and a second discharge pipe at the lower part; the second thin-film multitubular evaporator of the static type having a feedpipe having an upper part and a lower part connected to the second discharge pipe from the separator and including a discharge pipe only at the lower part thereof; a boiler having an upper part and a lower part, said upper part of said boiler being connected to and in open communication with the lower portion of the second evaporator, said boiler being further in communication with a first discharge pipe for liquid at the lower part of the boiler and a second discharge pipe at the upper part of the boiler; a scrubber; a condenser having a pipe for discharge of the condensates, said condenser being serially connected between the second discharge pipe from the boiler and the scrubber; and a recycle pipe connecting the discharge pipe from the condenser with the second discharge pipe from the separator.
REFERENCES:
patent: 3203466 (1965-08-01), Eckstrom
patent: 3265115 (1966-08-01), Maier
patent: 3273630 (1966-09-01), Kuhnlein
patent: 3356125 (1967-12-01), Standiford, Jr.
patent: 3450603 (1969-06-01), Meyers et al.
patent: 3476775 (1969-11-01), Sueur
patent: 3993671 (1976-11-01), Ramioulle
patent: 4233267 (1980-11-01), Coker et al.
Lacey David L.
Societe Chimiques des Charbonnages
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