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Class Information
Number: 23/307
Name: Chemistry: physical processes > Physical processes > Concentration of liquids in liquids > With direct heating
Description: Processes in which the liquid being concentrated is directly contacted with the concentrating medium (e.g., hot gases).
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6162262 |
Device for crystallization by isentropic expansion and its use |
Dec. 19, 2000 |
| 6080977 |
Apparatus for concentrating salt-containing solutions with microwave energy |
Jun. 27, 2000 |
| 4786488 |
Process for the purification of hydrochloric acids |
Nov. 22, 1988 |
| 4685935 |
Process for producing pure magnesium sulphite |
Aug. 11, 1987 |
| 4296082 |
Purification of wet process phosphoric acid |
Oct. 20, 1981 |
| 4282178 |
Use of hydrazine compounds as corrosion inhibitors in caustic solutions |
Aug. 4, 1981 |
| 4252667 |
Method for placing radioactive wastes mixed with bitumen into containers |
Feb. 24, 1981 |
| 4245998 |
Method and apparatus for crystallization of solution containing salts |
Jan. 20, 1981 |
| 4215098 |
Purification of wet process phosphoric acid |
Jul. 29, 1980 |
| 3970511 |
Process and installation for concentrating dilute solutions of corrosive products |
Jul. 20, 1976 |
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