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Class Information
Number: 423/488
Name: Chemistry of inorganic compounds > Halogen or compound thereof > Hydrogen halide > Recovery or purification
Description: Processes which include the step of removing an impurity either from the product or from the initial mixture, e.g., removing H2
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7597873 |
Process and apparatus for the recovery of metal oxide particles |
Oct. 6, 2009 |
| 7560083 |
Method for removing water molecules from vacuum chamber, program for executing the method, and storage medium storing the program |
Jul. 14, 2009 |
| 7550611 |
Carbon nanochips as catalyst supports for metals and metal oxides |
Jun. 23, 2009 |
| 7371363 |
Methods of purifying hydrogen fluoride |
May. 13, 2008 |
| 7351391 |
System and method for converting the spent remnants of a first pickling acid solution into a usable second pickling acid solution |
Apr. 1, 2008 |
| 7311799 |
Hydrofluoric acid wastewater treatment method and device |
Dec. 25, 2007 |
| 7288201 |
Methods for removing moisture from hydrogen halides |
Oct. 30, 2007 |
| 7175819 |
Regeneration of cupric etchants and recovery of copper sulfate |
Feb. 13, 2007 |
| 7128890 |
Purification of hydrochloric acid obtained as by-product in the synthesis of methanesulfonic acid |
Oct. 31, 2006 |
| 7060242 |
Method for treating waste materials containing halogen |
Jun. 13, 2006 |
| 7045111 |
High yield co-production of anhydrous hydrogen bromide and sodium bisulfate |
May. 16, 2006 |
| 7045109 |
Conversion of sodium bromide to anhydrous hydrobromic acid and sodium bisulfate |
May. 16, 2006 |
| 7045110 |
High yield co-production of anhydrous hydrogen bromide and sodium bisulfate |
May. 16, 2006 |
| 6998054 |
Selective fluoride and ammonia removal by chromatographic separation of wastewater |
Feb. 14, 2006 |
| 6946105 |
Process and apparatus for the recovery of metal oxide particles |
Sep. 20, 2005 |
| 6896865 |
Method for recovering hydrogen chloride from chlorine based waste and use of recovered hydrogen chloride |
May. 24, 2005 |
| 6890508 |
Preparation of largely HBr-free HCI gas and largely HBr-free aqueous HCI solution |
May. 10, 2005 |
| 6863780 |
Process of separating/purifying pentafluoropropane |
Mar. 8, 2005 |
| 6821351 |
Hydrofluoric acid generating composition and method of treating surfaces |
Nov. 23, 2004 |
| 6811763 |
Conversion of sodium bromide to anhydrous hydrobromic acid and sodium bisulfate |
Nov. 2, 2004 |
| 6797240 |
Process and apparatus for the extraction and regeneration of acids from spent acids |
Sep. 28, 2004 |
| 6793905 |
Method for producing high-purity hydrochloric acid |
Sep. 21, 2004 |
| 6719957 |
Process for purification of anhydrous hydrogen chloride gas |
Apr. 13, 2004 |
| 6692719 |
Process for regeneration of acid halide solutions |
Feb. 17, 2004 |
| 6676917 |
Process for the production of hydrochloric acid and neutralized sulfates |
Jan. 13, 2004 |
| 6660893 |
Hydrogen fluoride recovery process |
Dec. 9, 2003 |
| 6652817 |
Apparatus for processing organohalogen compounds |
Nov. 25, 2003 |
| 6605193 |
Recovery of HFC-32 |
Aug. 12, 2003 |
| 6589492 |
Process for recovering catalyst components from a mother liquor of liquid phase oxidation |
Jul. 8, 2003 |
| 6579377 |
Hydrofluoric acid generating composition and method of treating surfaces |
Jun. 17, 2003 |
| 6555086 |
Hydrogen fluoride recovery process |
Apr. 29, 2003 |
| 6540973 |
Process for producing hydrogen chloride |
Apr. 1, 2003 |
| 6521575 |
Method and unit for regeneration of solution for cleaning glass, method and unit for cleaning silicate glass, and cathode-ray tube |
Feb. 18, 2003 |
| 6522457 |
Apparatus for removal of water from evacuated chambers or from gasses using boron oxide |
Feb. 18, 2003 |
| 6521097 |
Process for separating hydrogen chloride from a mixture comprising an N-alkyl-2-pyrrolidone and hydrogen chloride |
Feb. 18, 2003 |
| 6468490 |
Abatement of fluorine gas from effluent |
Oct. 22, 2002 |
| 6451280 |
Process for regeneration of acids from spent acids |
Sep. 17, 2002 |
| 6440224 |
Hydrofluoric acid generating composition and method of treating surfaces |
Aug. 27, 2002 |
| 6423290 |
Method for recovering an organic solvent from an acidic waste stream such as in integrated chip manufacturing |
Jul. 23, 2002 |
| 6375911 |
Method and device for treating exhaust gas |
Apr. 23, 2002 |
| 6375915 |
Method of regenerating a spent pickling solution |
Apr. 23, 2002 |
| 6365121 |
Method for producing hyperazeotropic hydrochloric acid from metal chloride solutions |
Apr. 2, 2002 |
| 6352677 |
Process to produce commercial grade anhydrous hydrogen fluoride (AHF) and uranium oxide from the delfuorination of uranium hexafluoride (UF6) |
Mar. 5, 2002 |
| 6350425 |
On-site generation of ultra-high-purity buffered-HF and ammonium fluoride |
Feb. 26, 2002 |
| 6346227 |
Process for preparing pure hydrofluoric acid |
Feb. 12, 2002 |
| 6304367 |
Process for the removal of water from evacuated chambers or from gases |
Oct. 16, 2001 |
| 6290927 |
Method for the removal of unwanted color from hydrochloric acid |
Sep. 18, 2001 |
| 6270742 |
Hydrogen fluoride recovery process |
Aug. 7, 2001 |
| 6221132 |
Vacuum preparation of hydrogen halide drier |
Apr. 24, 2001 |
| 6221830 |
Purification process for hexafluoroethane products |
Apr. 24, 2001 |
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