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Class Information
Number: 203
Name: Distillation: processes, separatory >
Description: GENERAL STATEMENT OF CLASS SUBJECT MATTER










Class Number Class Name No. of Patents
203/DIG.22

Accessories

37
203/DIG.21

Acrylic acid or ester

116
203/DIG.3

Acrylonitrile

23
203/50

Adding material to distilland except water or steam per se

74
203/51

At least two materials

169
203/52

Mixtures of hydrocarbons

36
203/56

One additive an alcohol or ether

119
203/53

One material is water

42
203/54

A second material is aldehyde or ketone

11
203/55

A second material is an alcohol

17
203/57

Organic compound

254
203/61

Acid

93
203/63

Alcohol or ether

263
203/65

Hydroxy aromatic (e.g., phenol)

114
203/66

Methanol

45
203/64

Polyhydroxy alcohol or ether derivative thereof

214
203/62

Aldehyde or ketone

210
203/59

Amine

115
203/60

Ester

329
203/67

Halogenated hydrocarbon

171
203/58

Heterocyclic

230
203/68

Hydrocarbon

118
203/70

Acyclic

154
203/69

Aromatic

145
203/6

Addition of material to distilland to inhibit or prevent reaction or to stabilize

112
203/8

For inhibiting or preventing a polymerization reaction

127
203/9

Of unsaturated hydrocarbon

120
203/7

For scale inhibiting or corrosion preventing

138
203/21

And recovering heat by indirect heat exchange

47
203/22

Utilizing recovered heat for heating feed

186
203/24

Compressed vapor as heat source

93
203/23

Distillation residue as heat source

85
203/25

Utilizing recovered heat for heating the distillation zone

149
203/26

Compressed vapor as heat source

185
203/27

Utilizing recovered heat in subsequent step in process

131
203/98

And returning product of distillation step to distillation zone

345
203/DIG.11

Batch distillation

48
203/DIG.16

Combination

117
203/DIG.18

Control

153
203/49

Convective distillation with normally gaseous medium, e.g., air

318
203/86

Distillation in apparatus or element of specific material

177
203/12

Distilling to separate or remove only water

119
203/13

From nitric acid

16
203/14

From organic compound

243
203/18

Alcohol

144
203/19

Ethanol

142
203/17

Aldehyde or ketone

35
203/15

Organic acid

62
203/16

Acetic

43
203/DIG.14

Ejector-eductor

78
203/89

Filming of distilland for vaporization

168
203/88

Flash vaporization of distilland

222
203/DIG.4

Heat pump

85
203/DIG.5

Human waste

13
203/95

Including addition of water or steam

101
203/97

And returning product of distillation step to distillation zone

61
203/96

To distillation column

160
203/20

Including defoaming or inhibiting foam

39
203/4

Including purging of the system

69
203/DIG.2

Laboratory distillation

59
203/DIG.23

Methanol

42
203/99

Miscellaneous separatory

261
203/DIG.24

Mobile, marine distiller

14
203/DIG.25

Non-distilling bottoms treatment

111
203/100

Particular type of heating

317
203/71

Plural distillations performed on same material

226
203/84

And returning distillation product to a previous distillation zone

122
203/81

Distillation of initial distillate

120
203/82

And returning distillation product to a previous distillation zone

94
203/83

Including the addition of water or steam

35
203/85

Including the addition of water or steam

48
203/73

One a distillation under positive pressure or vacuum

169
203/78

And returning distillation product to a previous distillation zone

252
203/74

Distillation of initial distillate

133
203/75

And return of distillation product to a previous distillation zone

156
203/76

Including the addition of water or steam

44
203/77

Initial distillation under positive pressure or vacuum

166
203/79

Including the addition of water or steam

86
203/80

Initial distillation under positive pressure or vacuum

299
203/72

One a filming distillation

95
203/DIG.9

Plural feed

155
203/DIG.20

Power plant

78
203/DIG.6

Reactor-distillation

272
203/DIG.17

Saline water conversion

129
203/5

Separating isotopes or tautomers

19
203/DIG.19

Sidestream

270
203/DIG.1

Solar still

179
203/DIG.13

Spirits

102
203/90

Spraying of distilland into vaporization zone

114
203/DIG.7

Start up or shut down

27
203/91

Vaporization zone under positive pressure or vacuum

388
203/94

And returning product of distillation step to distillation zone

127
203/92

Including the addition of water or steam

108
203/93

And returning product of distillation step to distillation zone

54
203/DIG.10

Vinyl acetate

13
203/DIG.8

Waste heat

203
203/10

Water purification only

489
203/11

Under pressure or vacuum

268
203/28

With chemical reaction

88
203/29

Including step of adding catalyst or reacting material

212
203/34

Acid

68
203/35

Phosphoric or sulfuric acid

68
203/36

Alkaline oxide or hydroxide

64
203/37

Alkali metal hydroxide

117
203/30

For polymerizing unwanted component

7
203/33

Inorganic salt containing oxygen in the anion

60
203/38

Organic material

175
203/31

Oxidizing material

34
203/32

Reducing material

35
203/39

With disparate physical separation

212
203/40

Of entrained particles from a vapor or gas

135
203/42

Utilizing liquid sorption of component from gas or vapor

106
203/43

Utilizing liquid-liquid extracting of distillation product

115
203/44

Of distillate

29
203/46

And distilling extractant phase

56
203/45

And distilling raffinate phase

31
203/47

Utilizing removing solid from liquid

91
203/48

By crystallizing

81
203/41

Utilizing solid sorbent

129
203/87

With fractional condensation of vapor outside still

159
203/1

With measuring, testing or inspecting

352
203/3

Of concentration

144
203/2

Of temperature or pressure

358
 
 
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