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Class Information
Number: 23/299
Name: Chemistry: physical processes > Physical processes > Crystallization > With extraction
Description: Processes combined with a step of physical extraction or dissolving, before or after crystallization.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7611208 |
Methods for constructing underground borehole configurations and related solution mining methods |
Nov. 3, 2009 |
| 7332085 |
Method for the purification of an .alpha.-hydroxy acid on an industrial scale |
Feb. 19, 2008 |
| 7311837 |
Process for the continuous recovery of free tartaric acid from raw materials containing potassium hydrogentartrate |
Dec. 25, 2007 |
| 7270752 |
Process for purifying lactams |
Sep. 18, 2007 |
| 7211193 |
Processes for the purification of bis(2-hydroxyethyl)terephthalate |
May. 1, 2007 |
| 6960300 |
Process for preparing water soluble diterpenes and their applications |
Nov. 1, 2005 |
| 6896807 |
Capacitor electrolyte recovery |
May. 24, 2005 |
| 6855176 |
Emulsion crystallisation with recycle |
Feb. 15, 2005 |
| 6346523 |
Budesonide particles and pharmaceutical compositions containing them |
Feb. 12, 2002 |
| 6221153 |
Method for producing large crystals of complex molecules |
Apr. 24, 2001 |
| 5851490 |
Method for utilizing PH control in the recovery of metal and chemical values from industrial waste streams |
Dec. 22, 1998 |
| 5846501 |
Process for the selective recovery of the salt constituents from used hardening shop salts which contain nitrite-nitrate |
Dec. 8, 1998 |
| 5314506 |
Crystallization method to improve crystal structure and size |
May. 24, 1994 |
| 5230769 |
Process and apparatus for separating substances by crystallization |
Jul. 27, 1993 |
| 5104478 |
Method for making single crystals |
Apr. 14, 1992 |
| 5090965 |
Process for the separation of substances by cooling crystallization |
Feb. 25, 1992 |
| 4822585 |
Silicon purification method using copper or copper-aluminum solvent metal |
Apr. 18, 1989 |
| 4734102 |
Process for concentrating a suspension |
Mar. 29, 1988 |
| 4729888 |
Process of recovery of sulphur from minerals containing pyrites |
Mar. 8, 1988 |
| 4657559 |
Process for seed crystal preparation for phosphoric acid crystallization |
Apr. 14, 1987 |
| 4655789 |
Phosphoric acid crystallization process |
Apr. 7, 1987 |
| 4655790 |
Phosphoric acid crystallization process |
Apr. 7, 1987 |
| 4597768 |
Method for treatment in counter current of suspended particles with a liquid |
Jul. 1, 1986 |
| 4507244 |
Method for crystallizing a substance from a solution |
Mar. 26, 1985 |
| 4385902 |
Process for purifying crystalline potassium chloride |
May. 31, 1983 |
| RE30411 |
Process for purifying sodium hydroxide |
Oct. 7, 1980 |
| 4087253 |
Method of obtaining caustic soda from a sodium chloride liquor containing sulphate ions recovered from an electrolytic cell |
May. 2, 1978 |
| 4072472 |
Production of high purity salt from high sulfate salt deposits |
Feb. 7, 1978 |
| 4065270 |
Process for purifying sodium hydroxide |
Dec. 27, 1977 |
| 3953582 |
Process for the separation of sodium azide |
Apr. 27, 1976 |
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