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Class Information
Number: 203/
Name: Distillation: processes, separatory >
Description:

Sub-classes under this class:

Class Number	Class Name	Patents
203/1	With measuring, testing or inspecting	296
203/10	Water purification only	366
203/100	Particular type of heating	266
203/12	Distilling to separate or remove only water	89
203/20	Including defoaming or inhibiting foam	37
203/21	And recovering heat by indirect heat exchange	31
203/28	With chemical reaction	70
203/39	With disparate physical separation	157
203/4	Including purging of the system	66
203/49	Convective distillation with normally gaseous medium, e.g., air	292
203/5	Separating isotopes or tautomers	12
203/50	Adding material to distilland except water or steam per se	63
203/6	Addition of material to distilland to inhibit or prevent reaction or to stabilize	105
203/71	Plural distillations performed on same material	176
203/86	Distillation in apparatus or element of specific material	154
203/87	With fractional condensation of vapor outside still	141
203/88	Flash vaporization of distilland	193
203/89	Filming of distilland for vaporization	145
203/90	Spraying of distilland into vaporization zone	96
203/91	Vaporization zone under positive pressure or vacuum	346
203/95	Including addition of water or steam	93
203/98	And returning product of distillation step to distillation zone	287
203/99	Miscellaneous separatory	212
203/DIG.1	Solar still	154
203/DIG.10	Vinyl acetate	13
203/DIG.11	Batch distillation	47
203/DIG.13	Spirits	96
203/DIG.14	Ejector-eductor	76
203/DIG.16	Combination	109
203/DIG.17	Saline water conversion	103
203/DIG.18	Control	142
203/DIG.19	Sidestream	238
203/DIG.2	Laboratory distillation	58
203/DIG.20	Power plant	74
203/DIG.21	Acrylic acid or ester	107
203/DIG.22	Accessories	36
203/DIG.23	Methanol	39
203/DIG.24	Mobile, marine distiller	13
203/DIG.25	Non-distilling bottoms treatment	101
203/DIG.3	Acrylonitrile	22
203/DIG.4	Heat pump	76
203/DIG.5	Human waste	13
203/DIG.6	Reactor-distillation	260
203/DIG.7	Start up or shut down	25
203/DIG.8	Waste heat	154
203/DIG.9	Plural feed	143