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| Number | Title | Issue Date |
| 6652820 | Methods of making cesium salts and other alkali metal salts A method of making a cesium salt is described and involves reacting a cesium sulfate containing solution with lime to form 1) a solution containing at least cesium hydroxide and 2) a residue comprising calcium sulfate. The method further involves removing... | 11/25/2003 |
| 6555078 | Method of preparing lithium salts The present invention provides an inexpensive process for the preparation of lithium salts of formula LiX having a desired or required level of purity using lithium chloride and lithium sulfate. In the process of the invention, a lithium salt selected fro... | 04/29/2003 |
| 6548037 | Aluminium polychlorosulphates, process for their preparation and use thereof Aluminum polychlorosulphates having the general formula (I) Al(OH)l Clm (SO4)n Mp (I) where M represents an alkali metal l, m, n, p represent the number of moles per mole of aluminum, so that 1.74ࣘlࣘ2.25, 0.01à£... | 04/15/2003 |
| 6387348 | Method for treating spent caustic streams Sulfur compounds present as sulfides and mercaptans in spent caustic streams from refinery and petrochemical processes are oxidized by contacting them with an oxygen-containing gas in a packed column recycle reactor.... | 05/14/2002 |
| 6383235 | Cathode materials, process for the preparation thereof and secondary lithium ion battery using the cathode materials A process of preparation capable of easily preparing cathode materials having a homogeneous composition in a good mass productivity, a cathode material obtained by this process, and a secondary lithium ion battery using the cathode material. Aqueous solut... | 05/07/2002 |
| 5742070 | Method for preparing an active substance of chemical cells A method for preparing an active substance for use in a positive electrode in chemical cells comprising a negative electrode is described. The method comprises preparing a mixed aqueous solution of a water-soluble lithium compound, a water-soluble transit... | 04/21/1998 |
| 5582683 | Method for the recovery of chemical values from black liquor in multiple streams of different chemical values A method for the recovery of chemical values from spent lignocellulosic pulping liquor salts to produce white liquor of different sulfidities. Preferably, the white liquor is in the form of separate liquid streams, each of which is of a sulfidity that is ... | 12/10/1996 |
| 5508018 | Process for the regeneration of sodium hydroxide from sodium sulfide The present invention is directed toward a process for regenerating sodium hydroxide (NaOH) from aqueous solutions of sodium sulfide (Na2 S) comprising heating aqueous sodium sulfide in the presence of a metal selected from the group consisting... | 04/16/1996 |
| 4981556 | Process for the preparation of sulfide-free alkali liquor using copperoxide The invention relates to a process for the preparation of an essentially sulfide-free alkali liquor starting from a pulp mill alkali sulfide source, characterized by reacting in alkaline medium the alkali sulfice source with copper (II) oxide and/or coppe... | 01/01/1991 |
| 4855123 | Method of oxidizing sulfide-containing liquor A method of treating an aqueous sodium sulfide solution, such as white liquor in kraft pulping systems, for the oxidation of the sulfide with oxygen in the presence of a specific activated carbon catalyst which is (a) a particulate activated carbon cataly... | 08/08/1989 |
| 4724132 | Continuous process for the manufacture of metal salt solutions from water-insoluble metal compounds and mineral acids A continuous process for the manufacture of a metal salt solution is described which provides more economical products with higher quality than current processes. The process is safer, both to operating personnel and to the environment, than currently use... | 02/09/1988 |
| 4163043 | Process for removing H2 S and CO2 from gases and regenerating the adsorbing solution H2 S and CO2 from a waste gas are absorbed in an ammoniacal or alkali metal hydroxide solution. The resultant sodium, potassium or ammonium sulfide solution is reacted with pulverized copper oxide and the resultant copper sulfide pre... | 07/31/1979 |
| 4162187 | Process for production of sodium thiosulfate and sodium hydroxide Sodium sulfide or sodium hydrosulfide is oxidized to form sodium polysulfide and sodium hydroxide which may be further oxidized to sodium thiosulfate and sodium hydroxide. The oxidant is air, oxygen or oxygen in mixture with other gases, the reductant is ... | 07/24/1979 |
| 4105441 | Composition for the decomposition of sodium-mercury amalgam A method and composition are described for the decomposition of sodium-mercury amalgam in a reactor containing solid packing particles to form hydrogen, sodium hydroxide, and denuded mercury. The novel packing particles are comprised of a heterogeneous so... | 08/08/1978 |
| 4024229 | Production of polysulfide with PTFE coated catalyst Sodium polysulfide is prepared by the oxidation of sodium sulfide or sodium hydrosulfide, and by using new procedures and systems described, the production of thiosulfate can be markedly reduced and, in some cases, eliminated. The oxidant is air, oxygen o... | 05/17/1977 |
