Method and apparatus for regulating the NH.sub.3 content in scrubbing liquid used in a gas scrubbing process
First Claim
1. A process for regulating the NH3 content of an organic liquid which acts as a physical scrubbing agent and is used in a procedure for removing sour gases from gaseous mixtures, said liquid being freed from the absorbed gaseous components after the scrubbing procedure and being reused in the circuit, comprising adding an acid precipitant to the scrubbing agent to precipitate ammonia salts thereform and separating the resultant precipitant from the scrubbing agent, further comprising cooling the scrubbing agent after precipitation to a temperature in the range of about 0°
- to -95°
C., preferably 0°
to -40°
, said scrubbing agent containing reaction products, ammonia being removed from the scrubbing agent to the extent of leaving a residue of 300-2000 mg/kg, preferably 500-1000 mg/kg, which combines with the scrubbing agent to enchance scrubbing effectiveness.
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Abstract
A process for regulating the NH3 content in an organic liquid that acts as a physical scrubbing agent and is used in a procedure for absorbing sour gases from gaseous mixtures. To ensure undisturbed and reliable carrying out of the scrubbing process, an ammonia-precipitating precipitant is added to the scrubbing agent and the precipitate is then separated from the scrubbing agent. Preferred precipitants include sulphuric acid and phosphuric acid. The ammonia salts are effective fertilizers.
23 Citations
9 Claims
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1. A process for regulating the NH3 content of an organic liquid which acts as a physical scrubbing agent and is used in a procedure for removing sour gases from gaseous mixtures, said liquid being freed from the absorbed gaseous components after the scrubbing procedure and being reused in the circuit, comprising adding an acid precipitant to the scrubbing agent to precipitate ammonia salts thereform and separating the resultant precipitant from the scrubbing agent, further comprising cooling the scrubbing agent after precipitation to a temperature in the range of about 0°
- to -95°
C., preferably 0°
to -40°
, said scrubbing agent containing reaction products, ammonia being removed from the scrubbing agent to the extent of leaving a residue of 300-2000 mg/kg, preferably 500-1000 mg/kg, which combines with the scrubbing agent to enchance scrubbing effectiveness. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- to -95°
Specification