| Patents for C01D 9 - Nitrates of sodium, potassium, or alkali metals in general (399) |
|---|
| 09/12/2001 | EP1132488A1 Installation with cooled crystallisers and method for operating the installation |
| 08/14/2001 | US6274105 Loading cation exchange resin with potassium by feeding agricultural or fermentation by-product containing potassium and organic compounds; stripping to form solution; neutralizing; concentrating; crystallization |
| 08/01/2001 | CN1305955A Process for increasing concentration of solid-phase potassium nitrate and quality of resultant potassium nitrate |
| 07/25/2001 | CN1304878A Process for preparing potassium nitrate by metathesis method |
| 07/04/2001 | CN1301667A Preparing potassium nitrate by metathesis and crystilization |
| 06/07/2001 | WO2001040112A1 Production of two alkali metal salts by a combined ion exchange and crystallisation process |
| 06/07/2001 | CA2393324A1 Production of two alkali metal salts by a combined ion exchange and crystallisation process |
| 06/06/2001 | CN1297848A Preparation of sodium 15 N-nitrite |
| 02/14/2001 | CN1283589A Process for preparing potassium nitrate and sodium nitrate from nitrate-type solid-liquid ore |
| 02/14/2001 | CN1283583A Process for preparing semi-finished nitrate from nitrate-type bittern |
| 01/16/2001 | US6173840 Beneficiation of saline minerals |
| 09/27/2000 | CN1056819C Ion exchange process for producing potassium nitrate |
| 06/28/2000 | CN1257834A Process and equipment for preparing bittern mirabilite and separating anhydrous sodium sulfide |
| 05/31/2000 | EP0863865B1 Acid-salt metathetic process |
| 03/21/2000 | US6039783 Process and equipment for nitrogen oxide waste conversion to fertilizer |
| 02/08/2000 | US6022992 Acid-salt metathetic process |
| 06/23/1999 | CN1043750C Process for producing potassium nitrate |
| 03/31/1999 | EP0904251A1 A process for producing high-purity potassium salts |
| 12/08/1998 | US5846501 Process for the selective recovery of the salt constituents from used hardening shop salts which contain nitrite-nitrate |
| 09/16/1998 | EP0863865A1 Acid-salt metathetic process |
| 06/10/1998 | CN1184077A Ion exchange process for producing potassium nitrate |
| 04/29/1998 | CN1180048A Composition preventing potassium nitrate from caking and its use |
| 04/07/1998 | US5735929 Potassium sulfate and potassium nitrate in combination with the surfactant selected from disulfonate and oxyalkylated alcohol-carboxylic acid adduct; used as a fertilizer |
| 02/10/1998 | US5716419 Process for crystallization of mineral salts |
| 12/18/1997 | WO1997047559A1 A process for producing high-purity potassium salts |
| 10/15/1997 | EP0801028A2 Method for selective recovery of salt components from nitrite/nitrate-containing, used hardening salts |
| 10/13/1997 | CA2202416A1 Process for the selective recovery of the salt constituents from used hardening shop salts which contain nitrite-nitrate |
| 10/01/1997 | CN1160678A Potassium nitrate-preparing and composite nitrogen-potassium fertilizer-producing process |
| 04/09/1997 | CN1146972A Process for preparing potassium nitrate and sodium nitrate |
| 03/27/1997 | WO1997011047A1 Acid-salt metathetic process |
| 03/27/1997 | CA2232572A1 Acid-salt metathetic process |
| 03/05/1997 | CN1144192A Process for producing potassium nitrate |
| 03/05/1997 | CN1034173C Method for separating coffeine from tea waste |
| 01/22/1997 | EP0754651A1 Surface treatment of crystalline sodium nitrite or sodium nitrate |
| 05/22/1996 | CN1122793A By-product binary compound fertilizer containing nitrogen and potassium, and prodn. method thereof |
| 03/13/1996 | CN1118333A Process for extracting soluble non-sulfur potassium salt from feldspar |
| 12/27/1995 | CN1113886A Producing method for potassium nitrate |
| 11/30/1994 | CN1026775C Anticaking agent for low-foaming sodium nitrate or sodium nitrite |
| 11/23/1994 | CN1095359A Technology of preparing sodium nitrate by solid phase conversion and metathesis |
| 11/22/1994 | US5366710 Process for removing nitrogen oxides and sulfur oxides from gaseous stream |
| 08/17/1994 | CN1025668C Process for producing potassium nitrate with dilute nitric acid |
| 01/26/1994 | CN1081159A Method for exchange preparing potassium nitrate with natural zeolite |
| 01/05/1994 | CN1080290A Comprehensive utilization method of tea waste |
| 12/16/1993 | DE4243337C1 Explosive material disposal - uses water with deactivated material to give a soln. of potassium nitrate for further use |
| 04/28/1993 | CN1071395A Anticaking agent for low-foaming sodium nitrate or sodium nitrite |
| 04/21/1993 | CN1071143A Double decomposition reaction method for preparation of sodium nitrate |
| 03/30/1993 | CA1315233C Process for the preparation of potassium nitrate |
| 09/09/1992 | CN1064228A Rotary ion exchanging device |
| 09/02/1992 | CN1064063A Process for preparing potassium nitrate with dilute nitric acid |
| 05/05/1992 | US5110578 Continuous production of potassium nitrate via ion exchange |
| 02/18/1992 | CA1295812C Method for removing and using nitrogen oxides from fumes |
| 05/08/1991 | CN1012568B Simultaneous prodn. of sodium nitrate and ammonium chloride by flotation |
| 04/06/1991 | CA2027064A1 Continuous production of potassium nitrate via ion exchange |
| 01/16/1991 | CN1011225B Process for preparing potassium nitrate |
| 01/09/1991 | CN1048378A Process for production of potassium nitrate, potassium dihydrogen phosphate, potassium sulfate |
| 03/21/1990 | CN1040562A Method of production of potassium nitrate |
| 11/08/1989 | CN1036936A Method for producing sodium nitrate |
| 01/04/1989 | CN1030065A Preparation of boric acid together with sodium nitrate from boron-containing ores |
| 11/23/1988 | CN87103218A Production technique of sodium nitrate with mirabilite |
| 10/11/1988 | US4776930 Efficient electrolytic process; high purity; fertilizers |
| 10/06/1988 | DE3808633A1 Method for producing dissolved salts and acids by ion exchanger resins |
| 08/24/1988 | CN87100553A Combination process of producing boric acid and sodium nitrate from sodium barate and nitric acid |
| 05/31/1988 | US4748015 Method of complex production of sodium bifluoride, active sodium fluoride, hydrogen fluoride and potassium nitrate |
| 05/18/1988 | CN86107882A Improved double decomposition process for producing sodium nitrate |
| 04/20/1988 | CN86106750A Sodium nitrite produced by isothermal absorption of nitrogen oxide |
| 02/09/1988 | US4724132 Cross-pipe reactor to provide extreme mixing and agitation |
| 01/27/1988 | EP0254361A1 Process for the preparation of potassium nitrate |
| 08/26/1987 | CN86108860A Production of sodium nitrate |
| 07/29/1987 | CN87100251A Production of sodium nitrate |
| 05/26/1987 | US4668495 Process for obtaining potassium nitrate from potassium chloride and nitric acid |
| 04/29/1987 | CN86106394A Process for preparing potassium nitrate |
| 04/22/1987 | CN86103687A Simultaneous prodn. of sodium nitrate and ammonium chloride by flotation |
| 04/22/1987 | CN86101635A Simultaneous prodn. of potassium nitrate and ammonium chloride |
| 03/04/1987 | EP0213117A1 Process for the elimination and valorization of nitrogen oxides in fumes |
| 01/27/1987 | CA1217028A1 Method for the production of potassium sulfate using sulfuric acid and potassium chloride |
| 01/27/1987 | CA1217027A1 Process for producing and decomposing syngenite for producing k.sub.3h(so.sub.4).sub.2 crystals and potassium sulfate crystals, and for producing potassium nitrate |
| 01/22/1987 | DE3525654A1 Process for preparing potassium nitrate |
| 07/09/1986 | CN85106832A Process for producing nitrates by soda solution jet-absorbing nox |
| 05/13/1986 | US4588573 Using recycled aqueous solution; potassium bisulfate production minimized |
| 03/04/1986 | US4574075 Precipititation after reduction with nitrite ions |
| 02/04/1986 | US4568352 Heating to precipitate impurities, separation |
| 11/19/1985 | US4554151 Double salt of potassium bisulfate and potassium sulfate |
| 11/19/1985 | US4554139 Process for producing and decomposing syngenite |
| 05/14/1985 | US4517164 Purification of alkali metal nitrates |
| 12/20/1983 | US4421662 Nonaqueous purification of mixed nitrate heat transfer media |
| 08/30/1983 | CA1152726A1 Process for forming calcium nitrite |
| 08/02/1983 | US4396439 Recovery and recycle of nitrate and nitrite salts from chloride containing quench bath solids |
| 05/31/1983 | US4385920 Granulation of potash salts |
| 03/29/1983 | US4378342 Process for the manufacture of potassium nitrate |
| 12/21/1982 | US4364914 Process for the manufacture of potassium nitrate with co-production of hydrochloric acid |
| 12/21/1982 | CA1137789A1 Collector controller for chromatograph |
| 08/10/1982 | CA1129178A1 Process for the manufacture of potassium nitrate with coproduction of hydrochloric acid |
| 08/10/1982 | CA1129177A1 Process for the manufacture of potassium nitrate |
| 07/13/1982 | US4339759 Collector controller for chromatograph |
| 05/04/1982 | US4328196 Production of alkali metal products from alkali metal fluosilicate |
| 10/13/1981 | US4294813 Process for forming calcium nitrite |
| 08/04/1981 | CA1106154A1 Granulation of potash salts |
| 10/31/1979 | EP0004883A2 Process for the preparation of free-flowing inorganic ammonium and alkali salts |
| 03/20/1979 | US4145399 Scrubbing with alkali metal hydroxides |