| Patents for C01B 17 - Sulfur; Compounds thereof (11,743) |
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| 11/22/1990 | EP0397684A1 Process for forming fine ceramic powders and products thereof |
| 11/21/1990 | CN1047041A Solution removal of h2s from gas streams |
| 11/20/1990 | US4971781 Working up sodium sulfate-containing residues |
| 11/20/1990 | US4971780 Recovering sulfuric acid by dilution, filtration, oxidation of iron to ferric ions, liquid extraction, chelation |
| 11/13/1990 | US4969986 Regeneration of chelate compound containing scrubbing solution; hydrogen sulfide removal |
| 11/13/1990 | CA1276100C Process for cleaning a packed column |
| 11/07/1990 | EP0395740A1 Process for purifying aqueous buffer solutions. |
| 11/06/1990 | US4968502 Oxidation of hydrogen sulfide with nitric oxide using silica gel catalyst |
| 11/06/1990 | US4968501 Use of chlorous acid for removing sulfur dioxide from combustion gases |
| 11/06/1990 | US4968488 Removal of hydrogen sulfide from geothermal steam |
| 11/06/1990 | CA1275784C Reduction of nox in flue gas |
| 11/01/1990 | WO1990012753A1 Removal of sulfur dioxide (so2) from waste gases and recovery as sulfuric acid |
| 10/30/1990 | US4966938 Allyl thiourea polymer with surface-modifying agent |
| 10/30/1990 | US4966757 Combustion chamber for controlled ignition of sulfur |
| 10/30/1990 | US4966749 Sintering a mixture of metal sulfides, metallic molybdenum and molybdenum sulfide under reduced pressure |
| 10/30/1990 | US4966736 Process for preparing sulfur having uniform particle size distribution |
| 10/24/1990 | EP0394141A1 Process for the electrochemical treatment of an hydrogen sulfide containing gas |
| 10/23/1990 | US4965062 Hydrogen sulfide removal and sulfide recovery |
| 10/18/1990 | DE3912057A1 Gas desulphurisation using scrubbing medium - regenerated to give sulphur di:oxide used as heat carrier medium |
| 10/17/1990 | EP0392900A1 Process and apparatus for the treatment of a liquid with a gas |
| 10/17/1990 | EP0392211A1 Process for the reuse of spent sulfuric acid |
| 10/16/1990 | USRE33393 Absorption promoted by tungsten, molybdenum and a group 8 metal |
| 10/10/1990 | EP0390875A1 Process for separating antimony from acidic solutions containing same. |
| 10/07/1990 | CA2014001A1 Method for re-using waste sulphuric acid |
| 10/04/1990 | WO1990011250A1 Improved sulfur dioxide generator |
| 10/04/1990 | WO1990011246A1 Apparatus, process, and composition for in-situ generation of polyhydridic compounds of group iv-vi elements |
| 10/03/1990 | EP0389904A2 Semi-conducting oligomers and method relating thereto |
| 10/02/1990 | US4960581 Reacting metal or metal oxide with fluorine gas or nitrogen trifluoride; solid metal fluoride as molding auxiliary |
| 10/02/1990 | US4960576 Injecting ferric chelate which is reduced to ferrous chelate |
| 10/02/1990 | US4960575 Using soluble polymeric catalyst |
| 09/23/1990 | CA2010170A1 Semi-conducting oligomers and method relating thereto |
| 09/18/1990 | US4957724 Fixed beds |
| 09/18/1990 | US4957515 Process for sulfur removal and recovery from fuel gas using physical solvent |
| 09/11/1990 | US4956161 Process for removing SO from a gaseous mixture (OP-3409) |
| 09/04/1990 | US4954322 Process for the recovery of metal values contained in a gangue |
| 09/04/1990 | US4954262 Diffusion dialysis |
| 09/04/1990 | CA1273475A1 Sulfur condenser and degasser unit |
| 08/29/1990 | EP0384760A2 Improved inorganic pigments and their preparation |
| 08/29/1990 | EP0272306B1 Oligomerization of olefins |
| 08/29/1990 | EP0271563B1 Layered silicates and their synthesis |
| 08/29/1990 | EP0270659B1 Layered metal oxides containing interlayer oxides and their synthesis |
| 08/28/1990 | US4952387 Evaporative concentration, cooling, separation while controlling ferric concentration |
| 08/28/1990 | US4952380 Yields mixture of hydrogen and carbon monoxide from heavy hydrocarbon fuels; purification |
| 08/28/1990 | US4952378 Method for neutralization treatment of sulfuric acid containing iron ions |
| 08/28/1990 | CA1273230A1 Molybdenum-free, chromium-containing alloy resistant to sulphuric acid |
| 08/23/1990 | CA2007949A1 Inorganic pigments and process for their preparation |
| 08/22/1990 | CN1044844A Stabilized sulfur dissolving compositions |
| 08/21/1990 | US4950464 Purification of sulfuryl fluroide by selective adsorption |
| 08/16/1990 | EP0382284A1 Process for manufacturing on alkali metal-sulfide |
| 08/16/1990 | EP0381853A2 Stabilized sulfur dissolving compositions |
| 08/16/1990 | DE3903661A1 Method of reprocessing waste acid containing nitric and sulphuric acid |
| 08/14/1990 | US4948572 Process for the recovery of sulfur dioxide from gas flows |
| 08/14/1990 | US4948494 From a water-in-oil emulsion by treating with sulfur dioxide for conversion to elemental sulfur |
| 08/09/1990 | WO1990008845A1 Removal of nitric oxide from waste gases and recovery as nitric acid |
| 08/09/1990 | CA2008561A1 Stabilized sulfur dissolving compositions |
| 08/07/1990 | US4946658 Addition of pyritic materials to feed mix for desulfurization of phosphogypsum |
| 08/07/1990 | US4946620 Diethylene glycol dialkyl ether and polyethylene glycol dialkyl ether |
| 08/07/1990 | US4946481 Filter screen apparatus for the air outlet of a particle production apparatus |
| 08/02/1990 | DE3902276A1 Process for regenerating a laden pressurised scrubbing medium |
| 08/02/1990 | DE3901600A1 Process for treating the vacuum exhaust air of tar distillation plants |
| 07/31/1990 | US4944769 Process for the granulating of sulphur |
| 07/31/1990 | CA1272178A1 Control of so.sub.x emission |
| 07/26/1990 | DE4000188A1 Verfahren zur desulfurierung von gasfoermigen effluenten Method for phurisation of houses on gaseous effluent |
| 07/25/1990 | EP0379307A2 Process for removing SOx from a gaseous mixture |
| 07/25/1990 | EP0379204A1 Liquid oxidizing method and apparatus |
| 07/25/1990 | EP0379016A1 Process for the thermal decomposition of metal sulphates |
| 07/25/1990 | EP0378873A1 Regeneration of exhausted sulfuric acid by means of hydrogen peroxide |
| 07/25/1990 | EP0378872A1 Process for the prevention of SO2 formation in flue gases during barium sulfide production |
| 07/25/1990 | CN1008905B Process for the desulfurization of gas containing hydrogen sulfide |
| 07/24/1990 | US4943422 Process for treatment of gaseous effluents containing sulfur dioxide with oxygen |
| 07/19/1990 | CA2007902A1 Process for the thermal decomposition of metal sulphates |
| 07/18/1990 | CN1043919A Method for purifying high temp. reducibility gas |
| 07/13/1990 | CA2007255A1 Process for removing sox from a gaseous mixture |
| 07/11/1990 | EP0377521A1 High yield sodium hydrosulfite generation |
| 07/11/1990 | EP0377483A2 Method for purifying high-temperature reducing gas |
| 07/11/1990 | CN1043681A Method for operating claus-unit |
| 07/10/1990 | US4939817 Melting sulfur, minimization of interfacial area in separation pipe |
| 07/10/1990 | CA1271310A1 Sulfur recovery process using metal oxide absorbent with reducing gas purge |
| 07/05/1990 | DE3900069A1 Process for isolating elemental sulphur from material containing elemental sulphur |
| 07/04/1990 | EP0376031A2 Process for the recovery of sulfuric acid in the production of titanium dioxide |
| 07/04/1990 | CN1043445A Gas scrubbing process |
| 07/04/1990 | CN1008601B Method for cleaning high-temp. reduction gas |
| 07/03/1990 | US4938931 Hollow membrane |
| 06/28/1990 | DE3843295A1 Process for operating a Claus plant |
| 06/27/1990 | EP0375423A1 Stabilized concentrated sulphuric acid compositions |
| 06/27/1990 | EP0375077A2 Removing hydrogen sulphide from a gas mixture |
| 06/27/1990 | CN1043296A Titanium oxide with stable properties |
| 06/27/1990 | CN1043269A Removal and recovery of sulphur dioxide from gas streams |
| 06/26/1990 | US4937058 In gas phase using specific supported catalyst; one step |
| 06/26/1990 | US4937057 By absorption with scrubbing solutions containing sodium or potassium sulfide |
| 06/24/1990 | CA2006396A1 Process for the recovery of sulphuric acid in the production of titanium dioxide |
| 06/20/1990 | EP0373180A1 Process for increasing the density and improving the homogeneity of chevrel phase powders and chevrel phase wire obtained using said process |
| 06/20/1990 | CN1043089A Method for purification of acids from materials comprising acid and salt |
| 06/19/1990 | US4935221 Simultaneous solidificaation of sulfur while avoiding plugging |
| 06/14/1990 | WO1990006168A1 Method for purification of acids from materials comprising acid and salt |
| 06/13/1990 | DE3841222A1 Process for the parallel generation of silicon tetrafluoride and sulphur hexafluoride |
| 06/13/1990 | DE3841209A1 Process for preparing sulphur hexafluoride |
| 06/13/1990 | CN1008352B Recovery of waste acid of sulfuric acid alkylation |
| 06/12/1990 | US4933163 Process of removing hydrogen sulfide from exhaust gas |
| 06/12/1990 | US4933068 Hydrocarbon conversion process using crystalline microporous metal sulfide compositions |