US PATENT SUBCLASS 95 / 156
.~ And degasification of a liquid

Current as of: June, 1999
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95 /   HD   GAS SEPARATION: PROCESSES

149  DF  LIQUID CONTACTING (E.G., SORPTION, SCRUBBING, ETC.) {20}
156.~ And degasification of a liquid {7}
157  DF  .~.~> Defoaming
158  DF  .~.~> Degasification step occurs first, with removed gas subsequently contacted by liquid
159  DF  .~.~> By stripping with gas {5}
172  DF  .~.~> By reduction of pressure (e.g., flashing, etc.) {4}
178  DF  .~.~> By heating {5}
185  DF  .~.~> By liquid flow modifying or mechanical agitating
186  DF  .~.~> Liquid recycled or reused

DEFINITION

Classification: 95/156

And degasification of a liquid:

(under subclass 149) Process in which a gas is removed from a liquid.

(1) Note. Generally, the patents in this subclass and the subclasses indented hereunder involve contacting a plurality

of gases, with or without solid or liquid particles entrained therein, with a liquid in order to sorb or remove a gas or gases from the plurality of gases, allowing the remaining gas or gases to pass out of contact with the liquid. The liquid with gas entrained therein then is treated to remove the sorbed gas. The removal may be for regenerating the liquid for further use or may be for obtaining the sorbed gas. In addition, this area takes processes in which the degasification of a liquid occurs first and the removed gas is subjected to a liquid contacting step (see subclass 158).

(2) Note. In order for a patent to be placed here, the gas sorbed by a liquid from a plurality of gases and removed from the liquid must be normally gaseous at a temperature of 0 deg.C and a pressure of 760 mm Hg (e.g., hydrogen sulfide (H2S), carbon monoxide (CO), carbon dioxide (CO2), ethane (C2H6), ammonia (NH3), etc.). If, however, a constituent is at a temperature above its boiling temperature for a particular pressure, then the constituent is presumed to be a gas and the patent is placed here when the constituent is sorbed as a gas by a liquid, remains in gaseous phase in the liquid, and is removed from the liquid as a gas. The C4 hydrocarbons, which have boiling points above and below a temperature of 0 deg.C, are classified according to their individual boiling points in subclasses 149+ (e.g., butane with a boiling point of -0.5 deg.C at 760 mm Hg pressure is a gas at a temperature of 0 deg.C and 760 mm Hg pressure; whereas 1,2-butadiene with a boiling point of 10.8 deg.C at 760 mm Hg pressure is a liquid at a temperature of 0 deg.C and 760 mm Hg pressure). This handling of the C4 hydrocarbons is in contrast to that of Class 203, in which all of the C4 hydrocarbons are arbitrarily classified as liquids at a temperature of 0 deg.C and 760 mm Hg pressure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

30, for processes of degasification of a liquid by use of sound waves.

46, for processes of degasification of a liquid by selective diffusion of gases through a substantially solid barrier.

188+, and 206+, for removal of a liquid from the contact liquid. 241+, for processes of degasification of a liquid without liquid contacting.

SEE OR SEARCH CLASS

96, Gas Separation: Apparatus,

155+, for degasifying means for liquid.