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Class Information
Number: 95
Name: Gas separation: processes >
Description: This class provides for processes involving steps resulting in separation of a gas from a fluid mixture comprising (i) a gas and solid or liquid particles entrained therein, (ii) a liquid and gas entrained therein, or (iii) a plurality of gases. As a general rule for this class, there must be a relationship of process steps embracing: (a) inflow of the fluid mixture to be treated, (b) a step or steps effective to cause the separation into constituent parts, and (c) an outflow of at least one constituent which is separate and distinct from the outflow of another constituent, including outflow of a constituent by removing the separating medium itself. The gas separation for this class is effected by processes other than chemical reaction.










Class Number Class Name No. of Patents
95/82

Chromatography

183
95/85

Including use of gas flow distributor in column

6
95/89

Injection, per se, without separation

71
95/84

Liquid supported on particulate packing

15
95/83

Liquid supported on surface of capillary column

17
95/86

Plural separate columns

61
95/88

Specific column packing or sorbent material (e.g., particle size, composition, etc.)

86
95/87

With heating or cooling

158
95/39

Compressing and indirect cooling of gaseous fluid mixture to separate

104
95/42

And liquid contact (e.g., scrubbing, sorption, etc.)

53
95/41

And solid sorption

56
95/40

And use of heat absorbing agent

3
95/267

Deflecting

138
95/268

And filtering

177
95/269

Centrifugal force

129
95/270

Created by rotating equipment

114
95/271

Tangential gas inflow (e.g., cyclone, etc.)

238
95/272

Tortuous flow path

82
95/241

Degasification of liquid

119
95/254

And subsequent handling of evolved gas, stripping gas, or residue liquid

80
95/255

Evolved gas removed by sweep gas

18
95/256

For indirect heat exchange

14
95/257

Gas condensed

27
95/258

Gas recycled or further separated

77
95/259

Liquid further separated

44
95/260

By liquid flow modifying or mechanical agitating

149
95/261

Centrifugal force

228
95/262

Impinging on baffle

87
95/266

By reduction of pressure (e.g., flashing, etc.)

204
95/263

By stripping with gas

137
95/265

Nitrogen is stripping gas

47
95/264

Steam is stripping gas

49
95/242

Defoaming

74
95/253

Emulsion breaking or multiple liquid separating

99
95/243

Plural successive degassing treatments

52
95/244

Boiler feed water degassing

17
95/251

By heating

14
95/252

And liquid flow modifying or mechanical agitating

12
95/247

By reduction of pressure (e.g., flashing, etc.)

38
95/250

And heating

11
95/248

And liquid flow modifying or mechanical agitating

56
95/249

And heating

15
95/245

By stripping with gas

44
95/246

And reduction of pressure (e.g., flashing, etc.)

37
95/31

Difference in molecular velocity, density, or momentum of gases used

33
95/34

Centrifugal force

42
95/35

Created by rotating equipment

36
95/32

Passing gases through nozzle

45
95/33

Directing gas streams toward one another

5
95/57

Electric or electrostatic field (e.g., electrostatic precipitation, etc.)

96
95/63

And nonelectrical separation of fluid mixture

41
95/67

By heating or cooling

27
95/70

Distinct separation step follows electric or electrostatic treatment

74
95/69

Distinct separation step precedes electric or electrostatic treatment

75
95/68

Including cleaning or regeneration of separating means (e.g., particulate bed filter, deflector, etc.)

38
95/64

Liquid addition to gaseous fluid mixture

49
95/65

Liquid addition precedes electrical precipitation

54
95/66

With heating or cooling

35
95/77

Continuously moving electrode

20
95/78

Including baffling, deflection, or restriction of gas flow

193
95/79

Plural separate stages or zones (e.g., separate ionization and collection regions, etc.)

48
95/80

Pulsing or time-varying electric field (e.g., ac, pulsed dc, etc.)

12
95/81

Pulsing or time-varying electric field (e.g., ac, pulsed dc, etc.)

49
95/71

With addition of liquid to gaseous fluid mixture

114
95/72

Vaporization of liquid

17
95/58

With addition of solid, gas, or vapor

109
95/62

Agglomerating gas-borne particles

23
95/59

Electrode treating (e.g., coating, cleaning, etc.)

68
95/60

Heating or cooling

48
95/61

Solid is electrically conducting

27
95/74

With cleaning of collector electrode

56
95/75

By liquid flushing

45
95/76

By scraping or vibrating

60
95/73

With heating or cooling

73
95/273

Filtering

605
95/284

And reduction of pressure

43
95/285

Coated or chemically treated filter

167
95/277

Moving filter

63
95/286

Plural separate media

133
95/287

In series

206
95/274

Through particulate solids

55
95/275

Moving bed

61
95/276

With cleaning of filter bed

48
95/278

With cleaning of filter

195
95/282

By mechanical manipulation

64
95/279

By use of gas

134
95/280

Pulsed gas flow

204
95/281

By use of liquid

51
95/283

With heating of filter

77
95/288

Heat exchanging

178
95/289

Cold wall-hot wall thermal diffusion

16
95/290

Condensing to solid

77
95/149

Liquid contacting (e.g., sorption, scrubbing, etc.)

140
95/216

And deflection

80
95/221

Deflection in plural serial stages

35
95/222

Using diverse type deflectors

10
95/218

Including movement of deflector

54
95/219

Including rotation of liquid, gaseous fluid mixture, or gas-liquid mixture through 360 degrees in stationary apparatus

97
95/220

With heating or cooling

32
95/217

Liquid is in form of curtain

18
95/156

And degasification of a liquid

35
95/178

By heating

29
95/183

Carbon dioxide removed

104
95/182

Halogen compound removed

13
95/179

Liquid recycled or reused

66
95/180

Liquid cooling step before being recycled

45
95/184

Organic compound removed

31
95/181

Sulfur compound removed

80
95/185

By liquid flow modifying or mechanical agitating

13
95/172

By reduction of pressure (e.g., flashing, etc.)

55
95/173

And heating

39
95/174

Liquid recycled or reused

88
95/177

Liquid recycled or reused

70
95/176

Removed gas recycled

39
95/175

Vacuum applied

27
95/159

By stripping with gas

46
95/170

Air is stripping gas

13
95/165

And heating

18
95/166

Liquid recycled or reused

66
95/168

Steam is stripping gas

27
95/167

Vaporized component of contact liquid is stripping gas

11
95/160

And reduction of pressure (e.g., flashing, etc.)

21
95/161

And heating

45
95/162

Steam is stripping gas

24
95/164

Feed gas or constituent thereof is stripping gas

13
95/163

Liquid recycled or reused

53
95/171

Inert stripping gas

17
95/169

Liquid recycled or reused

59
95/157

Defoaming

13
95/158

Degasification step occurs first, with removed gas subsequently contacted by liquid

37
95/186

Liquid recycled or reused

42
95/214

And filtration of gas

119
95/215

Including movement of filter

14
95/204

And recycle of gas for further contact

42
95/187

And recycle or reuse of contact liquid for further contact

127
95/188

After separation of liquid from contact liquid

55
95/189

And separation of solid from contact liquid

46
95/193

By heating (e.g., fractional distillation, etc.)

99
95/194

Indirect heat exchange

43
95/190

By liquid-liquid extraction or formation of azeotrope

25
95/192

By reduction of pressure (e.g., flashing, etc.)

53
95/191

By stripping with gas

53
95/195

After separation of solid from contact liquid

77
95/196

By filtration

45
95/197

By gravity separation

42
95/198

And deflection to remove liquid particles from gas

25
95/199

Liquid contact in plural serial stages

115
95/201

Reduction of pressure during liquid contact

10
95/200

Removal of solid or liquid particles from gas

31
95/203

Reduction of pressure

14
95/202

Removal of solid or liquid particles from gas

30
95/206

And separation of liquid from contact liquid

38
95/209

By heating (e.g., fractional distillation, etc.)

76
95/208

By reduction of pressure (e.g., flashing, etc.)

31
95/207

By stripping with gas

28
95/205

And separation of solid from contact liquid

78
95/152

Coagulating or flocculating agent

35
95/155

Defoaming or antifoaming agent

34
95/226

Gaseous fluid mixture discharged against or beneath surface of liquid body

125
95/153

Hydrate inhibitor

56
95/223

In plural serial stages

94
95/224

Liquid sprays

101
95/225

With heating or cooling

48
95/150

Including foaming of liquid to aid in the separation

25
95/230

Inorganic gas, liquid particle, or solid particle sorbed (e.g., vapor, mist, dust, etc.)

112
95/236

Carbon dioxide sorbed

415
95/233

Halogen or halogen containing compound sorbed

114
95/234

Metal or metal containing compound sorbed

60
95/232

Nitrogen or nitrogen containing compound sorbed

130
95/235

Sulfur or sulfur containing compound sorbed

490
95/231

Water sorbed

145
95/151

Mechanical agitation of liquid body to contact gaseous fluid mixture

24
95/210

On surface extending mass

58
95/213

Apertured partition member

41
95/211

Particulate media, fibrous media, or packing elements

154
95/212

And cleaning of particulate media, fibrous media, or packing elements

19
95/237

Organic gas, liquid particle, or solid particle sorbed (e.g., vapor, mist, dust, etc.)

214
95/240

Alkene sorbed

28
95/238

Alkyne sorbed (e.g., acetylene, etc.)

17
95/239

Cyclic compound sorbed

31
95/154

Surfactant or wetting agent

52
95/228

With cooling

126
95/229

Cooling before liquid contacting

73
95/227

With heating

92
95/36

Liquid-solid slurry used

38
95/38

Halogen containing compound removed from gas

3
95/37

Organic compound removed from gas

6
95/28

Magnetic separation

80
95/27

Magnetized particle bed

26
95/291

Miscellaneous

21
95/43

Selective diffusion of gases

107
95/44

Selective diffusion of gases through immobilized liquid

53
95/45

Selective diffusion of gases through substantially solid barrier (e.g., semipermeable membrane, etc.)

747
95/51

Carbon dioxide or carbon monoxide permeates barrier

404
95/46

Degasification of liquid

235
95/48

Halogen containing compound permeates barrier

45
95/53

Helium permeates barrier

102
95/55

Hydrogen permeates barrier

334
95/56

Elemental metal or alloy barrier

215
95/47

Nitrogen or nitrogen containing compound permeates barrier

206
95/50

Organic compound permeates barrier

230
95/54

Oxygen permeates barrier

579
95/49

Sulfur containing compound permeates barrier

94
95/52

Water vapor permeates barrier

320
95/900

Solid sorbent

119
95/901

Activated carbon

88
95/902

Molecular sieve

238
95/903

Carbon

48
95/90

Solid sorption

287
95/92

And liquid contact (e.g., scrubbing, sorption, etc.)

117
95/94

And recycle or reuse of contact liquid for further contact

27
95/93

Sweep gas used on solid sorbent

27
95/148

And regeneration

327
95/95

Including reduction of pressure

87
95/96

Plural pressure varying steps (e.g., pressure swing adsorption, etc.)

550
95/103

Stepped pressure reduction

154
95/97

Sweep gas used

86
95/98

Feed gas or constituent thereof is sweep gas

207
95/100

Stepped pressure reduction

123
95/101

Vacuum applied

167
95/102

Vacuum applied

146
95/99

With heating or cooling

98
95/104

Sweep gas used

63
95/105

Feed gas or constituent thereof is sweep gas

199
95/106

With heating or cooling

146
95/116

Inorganic gas or liquid particle sorbed (e.g., vapor, mist, etc.)

210
95/139

Carbon dioxide sorbed

568
95/140

Carbon monoxide sorbed

170
95/131

Halogen or halogen containing compound sorbed

116
95/132

Chlorine or chlorine containing compound sorbed

89
95/133

Metal or metal containing compound sorbed

112
95/134

Mercury sorbed

190
95/128

Nitrogen containing compound sorbed

113
95/129

Nitrogen oxide sorbed

124
95/130

Nitrogen sorbed

519
95/127

Noble gas sorbed

84
95/138

Oxygen or ozone sorbed

297
95/135

Sulfur containing compound sorbed

111
95/136

Hydrogen sulfide sorbed

160
95/137

Sulfur dioxide or sulfur trioxide sorbed

144
95/117

Water sorbed

312
95/121

And regeneration of solid sorbent

90
95/126

By heating

111
95/122

Sweep gas used

124
95/123

Hot sweep gas

119
95/125

And cooling of solid sorbent

44
95/124

And cooling of sweep gas

24
95/118

Plural separating treatments of gas by solid sorbent to remove water

48
95/119

And regeneration of any solid sorbent

50
95/120

Heating or cooling

77
95/107

Moving sorbent

117
95/108

Fluidized bed

65
95/109

Having gravity flow of sorbent from zone to zone

29
95/110

Gravity flow of sorbent from zone to zone

33
95/111

Sweep gas used

18
95/112

Steam is sweep gas

7
95/113

Rotating housing containing fixed sorbent or rotating plurality of housings

130
95/141

Organic gas or liquid particle sorbed (e.g., vapor, mist, etc.)

268
95/142

Halogen containing compound sorbed (e.g., phosgene, etc.)

133
95/143

Hydrocarbon sorbed

474
95/144

Alkene sorbed

98
95/145

Alkyne sorbed (e.g., acetylene, etc.)

22
95/147

Benzene ring containing compound sorbed

64
95/146

Gasoline sorbed

86
95/91

Soluble or deliquescent material used

34
95/114

With plural indirect heat transfer steps on solid sorbent or gaseous fluid mixture or constituent thereof

95
95/115

Heating and cooling

167
95/29

Sound waves used

59
95/30

Degasification of liquid

69
95/1

With control responsive to sensed condition

142
95/8

Concentration sensed

184
95/11

Flow of fluid mixture to sorber stopped or diverted to other equipment, or sorbent regenerated

97
95/12

Gas flow rate modified

110
95/10

Humidity sensed

72
95/9

Ph sensed

26
95/13

Sorbent flow rate modified

32
95/2

Electric or electrostatic field (e.g., electrostatic precipitation, etc.)

45
95/3

Concentration sensed

61
95/6

Current sensed

52
95/5

Sparking sensed

21
95/4

Temperature sensed

32
95/7

Voltage sensed

44
95/23

Gas flow rate sensed

143
95/24

Liquid level sensed

81
95/19

Pressure sensed

212
95/20

Apparatus cleaned

71
95/22

Gas flow rate modified

130
95/21

Sorbent regenerated

54
95/14

Temperature sensed

123
95/15

And pressure sensed

77
95/17

Cooling

35
95/18

Heating

71
95/16

Modification of flow rate of liquid which is added to gas

34
95/25

With recording or signaling condition

117
95/26

With timing of operation

150
 
 
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