| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 41 | Methods of making cesium salts and other alkali metal salts | US09824623 | 2001-04-02 | US06652820B2 | 2003-11-25 | Bart F. Bakke |
| 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 the residue from the solution and converting the cesium hydroxide that is present in the solution to at least one type of cesium salt. The present invention further relates to uses of the cesium salt as well as methods of making cesium hydroxide using lime. Also, methods of making alkali metal salts and alkali metal hydroxides are also described. | ||||||
| 42 | Abatement of NF.sub.3 with metal oxalates | US971545 | 1997-11-17 | US5910294A | 1999-06-08 | John Giles Langan; Howard Paul Withers, Jr. |
| A process for abating NF.sub.3 by contacting it with a metal oxalate or carbonate. | ||||||
| 43 | Process of preparing a solution of cesium and rubidium salts | US649712 | 1996-09-18 | US5900221A | 1999-05-04 | Hartmut Hofmann; Klaus Kobele; Horst Prinz; Klaus Schade |
| The process for preparing a cesium and rubidium salt-containing solution includes a hydrothermal digestion of an uncalcined pollucite and/or calcined lepidolite particulate having an average particle size up to 0.5 mm with an aqueous solution of Ca(OH).sub.2 in a suspension with a mole ratio of SiO.sub.2 to CaO of from 1:2.5 to 1:1.25 in a rotary tubular autoclave at a digestion temperature of 200 to 280.degree. C., under a pressure of from 15 to 65 bar and at a suspension density between 8 and 18% by weight for from 0.5 to 3 hours; filtering the suspension to remove insoluble solids and to form a digestion filtrate; adding at least one acid or acid anhydride to the digestion filtrate to adjust its pH to 6 and to form the cesium and rubidium salt-containing solution; and performing an evaporation after the hydrothermal digestion to obtain an increase in concentration of cesium salts and rubidium salts in the cesium and rubidium salt-containing solution and to adjust a density of the cesium and rubidium salt-containing solution to from 1.6 to 3.3 g/cm.sup.3. An optional aeration of the digestion filtrate with carbon dioxide to remove lithium and calcium ions in precipitated carbonates may be performed. | ||||||
| 44 | Thermally-driven ion-exchange process for lithium recovery | US880432 | 1997-06-23 | US5833844A | 1998-11-10 | Frederick Wells Leavitt |
| Ions (e.g. lithium) can be removed or recovered from brines containing those ions and optionally one or more other ions (e.g. other alkali metal ions) by the use of a temperature-swing, ion-exchange process and apparatus employing an ion-exchange material. The process and apparatus depends on a change in the selectivity coefficient of an ion exchange material for the ions desired to be recovered with a change in temperature, resulting in desirable ions being relatively selectively released at one temperature and undesirable ions being relatively selectively released at another temperature. The process of the invention can be used to effect the separation of any ion (or set of ions) from another ion or from a set of ions wherein the selectivity coefficient for one ion (or set of ions) has a substantial temperature dependence, compared to that for the other ion (or set of ions). | ||||||
| 45 | Thermally-driven ion-exchange process for lithium recovery | US547749 | 1995-10-25 | US5681477A | 1997-10-28 | Frederick Wells Leavitt |
| Ions (e.g. lithium) can be removed or recovered from brines containing those ions and optionally one or more other ions (e.g. other alkali metal ions) by the use of a temperature-swing, ion-exchange process employing an ion-exchange material. The process depends on a change in the selectivity coefficient of an ion exchange material for the ions desired to be recovered with a change in temperature, resulting in desirable ions being relatively selectively released at one temperature and undesirable ions being relatively selectively released at another temperature. The process of the invention can be used to effect the separation of any ion (or set of ions) from another ion or from a set of ions wherein the selectivity coefficient for one ion (or set of ions) has a substantial temperature dependence, compared to that for the other ion (or set of ions). | ||||||
| 46 | Extraction of cesium and strontium ions from nuclear waste | US427077 | 1995-04-21 | US5666642A | 1997-09-09 | M. Frederick Hawthorne; Gary B. Dunks |
| Methods and agents for extracting cesium and strontium ions from aqueous solutions, including aqueous fission product waste solutions, are disclosed using substituted metal dicarbollide ions containing one or more chemical groups that increase solubility of the substituted metal dicarbollide ion in non-nitrated, non-chlorinated solvents, or using metal dicarbollide ion-substituted silicones. | ||||||
| 47 | Compacts of spray dried water soluble compounds | US233767 | 1988-08-19 | US5108726A | 1992-04-28 | Roger A. Baldwin; Virgil J. Barczak |
| The present invention is directed to articles of manufacture comprising solid compacts, formed at elevated pressures, from homogenous, finely divided powders of spray dried water soluble inorganic compounds. The solid compacts are characterized by their readily water dissolvable, substantially nondusting and dense nature. | ||||||
| 48 | Recovery of cesium chloride from pollucite ore | US352267 | 1989-05-16 | US4938934A | 1990-07-03 | G. Chithambarathanu Pillai; Kenneth S. Pisarcyzk |
| A process for recovering purified cesium chloride from a cesium aluminum silicate ore in which the ore is digested with aqueous hydrochloric acid and the silica solids removed to obtain an aqueous acidic digest solution of metal chlorides consisting of cesium chloride together with other metal chlorides, by(a) evaporating water from the digest solution to obtain a solid mixture of metal chlorides, including cesium chloride and hydrated aluminum chloride;(b) heating solid phase mixture at a temperature effective for converting the hydrated aluminum chloride to aluminum oxide without decomposing the cesium chloride;(c) extracting the resulting solids with water to obtain an aqueous extract of cesium chloride; and(d) separating the residual solids containing the aluminum oxide to produce a purified extract of cesium chloride. | ||||||
| 49 | Process for recovering cesium from cesium alum | US512925 | 1983-07-12 | US4469670A | 1984-09-04 | Peter G. Mein |
| Cesium is recovered from cesium alum, CsAl(SO.sub.4).sub.2, by an aqueous conversion and precipitation reaction using a critical stoichiometric excess of a water-soluble permanganate to form solid cesium permanganate (CsMnO.sub.4) free from cesium alum. The other metal salts remain in solution, providing the final pH does not cause hydroxides of aluminum or iron to form. The precipitate is separated from the residual solution to obtain CsMnO.sub.4 of high purity. | ||||||
| 50 | Process for recovering cesium from cesium alum | US512926 | 1983-07-12 | US4466950A | 1984-08-21 | Peter G. Mein |
| Cesium is recovered from cesium alum, CsAl(SO.sub.4).sub.2, by a two-reaction sequence in which the cesium alum is first dissolved in an aqueous hydroxide solution to form cesium alum hydroxide, CsAl(OH).sub.3, and potassium sulfate, K.sub.2 SO.sub.4. Part of the K.sub.2 SO.sub.4 precipitates and is separated from the supernatant solution. In the second reaction, a water-soluble permanganate, such as potassium permanganate, KMnO.sub.4, is added to the supernatant. This reaction forms a precipitate of cesium permanganate, CsMnO.sub.4. This precipitate may be separated from the residual solution to obtain cesium permanganate of high purity, which can be sold as a product or converted into other cesium compounds. | ||||||
| 51 | Phenolic cation exchange resin material for recovery of cesium and strontium | US375232 | 1982-05-05 | US4423159A | 1983-12-27 | Martha A. Ebra; Richard M. Wallace |
| A phenolic cation exchange resin with a chelating group has been prepared by reacting resorcinol with iminodiacetic acid in the presence of formaldehyde at a molar ratio of about 1:1:6. The material is highly selective for the simultaneous recovery of both cesium and strontium from aqueous alkaline solutions, such as, aqueous alkaline nuclear waste solutions. The organic resins are condensation polymers of resorcinol and formaldehyde with attached chelating groups. The column performance of the resins compares favorably with that of commercially available resins for either cesium or strontium removal. By combining Cs.sup.+ and Sr.sup.2+ removal in the same bed, the resins allow significant reduction of the size and complexity of facilities for processing nuclear waste. | ||||||
| 52 | Preparation of alkali metal hexafluorochlorates | US3620689D | 1965-08-20 | US3620689A | 1971-11-16 | FAUST JOHN P; JACHE ALBERT W; KLANICA ANDREW J |
| Process for preparing alkali metal hexafluorochlorates having the formula MClF6 where M is potassium, rubidium or cesium which comprises reacting MF with chlorine pentafluoride at about 0* to 150* C. and at autogenous pressure in a reaction zone defined by surfaces of nickel fluoride.
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| 53 | Process for recovering sulfur dioxide | US3607038D | 1968-12-24 | US3607038A | 1971-09-21 | TAYLOR JAMES A |
| In a process for recovering SO2 from an SO2-containing gas, e.g., flue gas, by contacting the gas with an aqueous solution of a metal sulfite such as potassium, cesium, and rubidium sulfite to produce an aqueous solution of the corresponding metal bisulfite which is a precursor of SO2, recovering the metal bisulfite therefrom as the corresponding metal pyrosulfite, and treating the metal pyrosulfite to produce SO2, the improvement wherein the metal bisulfite is recovered by crystallizing it out of solution in the form of the corresponding metal pyrosulfite by adding to the solution methanol or ethanol, or mixtures of the two, while maintaining the resultant mixture at about 120* to 150* F.
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| 54 | Phosphoro- and phosphonofluorido-thioic acids and their salts | US3558269D | 1968-03-05 | US3558269A | 1971-01-26 | ROESKY HERBERT W |
| CLAIMED ARE PHOSPHONOFLUORIDOTHIOIC ACIDS AND THEIR SALTS, USEFUL AS REDUCING AGENTS, OF THE FORMULAS:
(II) M(+) (-)S-P(=S)(-F)2, (III) M(+) (-)S-P(=S)(-F)-S-P(=S)(-F)-S(-) M(+) AND (IV) M(+) (-)S-P(=S)(-F)-S-S-P(=S)(-F)-S(-) M(+) IN WHICH M IS HYDROGEN, A METAL, OR SPECIFIED TYPES OF ONIUM CATIONS; PREPARATION OF THOSE IN WHICH M IS AN ALKALI METAL BY REACTING P4S10 WITH AN ALKALI METAL FLURIDE IN THE PRESENCE OF (A), FOR (II), ACETRONITRILE, (B), FOR (III), WATER, AND (C), FOR (IV), ETHYLENE GLYCOL DIMETHYL ETHER; AND IN PREPARATION OF (II), WHEN M IS AN ALKALI METAL, BY REACTING SPF3 WITH AN ALKALI METAL FLUORIDE IN THE PRESENCE OF ACETONITRILE. |
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| 55 | Ion exchange materials and their method of preparation | US3485763D | 1965-02-12 | US3485763A | 1969-12-23 | LEFEVRE JEAN; PROSPERT JACQUES; RAGGENBASS ANDRE |
| 56 | Separation of cesium and strontium by electrodialysis | US42826065 | 1965-01-26 | US3382164A | 1968-05-07 | WEBB WILLIAM H; HERSHEY HARRY C; MITCHELL RONALD D |
| 57 | Method of reprocessing and/or separating nuclear fuels | US36792364 | 1964-05-15 | US3322509A | 1967-05-30 | HEINRICH VOGG HUBERT |
| 58 | Monoalkyl phosphoric acid extraction of cesium and strontium values | US31017763 | 1963-09-19 | US3258315A | 1966-06-28 | SCHMITT JOHN M |
| 59 | Process for preparing cesium compounds from cesium alum | US18583362 | 1962-04-09 | US3207571A | 1965-09-21 | BERTHOLD CORNELIUS E |
| 60 | Removal of cesium from aqueous solutions by adsorption | US14877061 | 1961-10-30 | US3097920A | 1963-07-16 | KNOLL KENNETH C |
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