-
1.发明授权
公开(公告)号：US4668495A
公开(公告)日：1987-05-26
申请号：US771294
申请日：1985-08-30
申请人： Luis S. Portela
发明人： Luis S. Portela
摘要： The present invention provides a process for manufacture of potassium nitrate from potassium chloride and nitric acid. A source of potassium chloride may be screened and separated into fine and coarse fractions, or the screening may be eliminated and the source may be separated into equal coarse fractions. The coarse fraction, when screening has occurred, or one of the equal fractions, where no screening has occurred, is dissolved in a dilute solution of nitric acid prior to any reaction. Thereafter, either the fine fraction (if screening occurred) or the other equal fraction (if no screening occurred) reacts with the dilute nitric acid-potassium chloride solution and additional nitric acid having a concentration of about 60% at ambient temperature. The resulting solution may be crystallized with or without the prior separation of solid potassium nitrate. Nitric acid is recovered by solvents from a residual brine solution after crystallization. The recovered nitric acid is washed to provide a nitric acid solution having a concentration of 3% to 10% which is recycled for use at the beginning of the process to dissolve the coarse fraction of potassium chloride prior to the reaction stage.
摘要翻译： 本发明提供从氯化钾和硝酸制造硝酸钾的方法。 氯化钾的来源可以筛选并分离成精细和粗级分，或者筛选可以被去除，并且源可以分离成相等的粗级分。 当发生筛选时，粗级分或其中没有发生筛选的相等级分之一在任何反应之前溶解在稀硝酸溶液中。 此后，细小部分（如果发生筛选）或其他相等的分数（如果没有筛选发生）在环境温度下与稀硝酸 - 氯化钾溶液和浓度约为60％的另外的硝酸反应。 所得到的溶液可以在或不先前分离固体硝酸钾的情况下结晶。 结晶后，硝酸由残留的盐水溶液通过溶剂回收。 回收的硝酸被洗涤以提供浓度为3％至10％的硝酸溶液，其在该方法开始时被循环使用，以在反应阶段之前溶解氯化钾的粗级分。
-
公开(公告)号：US11332379B2
公开(公告)日：2022-05-17
申请号：US17384827
申请日：2021-07-26
发明人： Futai Chen , Yongqian Chu , Yan Yang , Liqiang Bai
IPC分类号： B01D1/26 , B01D9/00 , B01D61/14 , C01D5/16 , C01D9/16 , C02F9/00 , C02F11/14 , C02F1/04 , C02F1/20 , C02F1/28 , C02F1/44 , C02F1/52 , C02F1/56 , C02F1/66 , C01D3/16 , C02F11/148 , C02F101/30
摘要： An industrial waste salt resourceful treatment method comprises the following steps: the industrial waste salt is sequentially subject to dissolving, chemical pre-purification, deep purification, organic matter concentration reduction, adsorption and oxidation decolorization and multi-effect evaporative crystallization to respectively obtain sodium sulfate, sodium chloride and sodium nitrate crystals; the crystallization temperature of sodium sulfate is in a range of 75° C. to 85° C.; the crystallization temperature of sodium chloride is in a range of 60 to 70° C.; and the crystallization temperature of sodium nitrate is in a range of 45° C. to 55° C. An industrial waste salt resourceful treatment device is further provided.
-
3.发明申请METHOD AND APPARATUS FOR SEQUENCING-BATCH PURIFICATION OF POTASSIUM NITRATE FROM SOLID WASTE PRODUCED BY GLASS-STRENGTHENING PROCESS 有权用于通过玻璃加固工艺生产的固体废物对硝酸钾进行排序的方法和装置公开(公告)号：US20130323156A1
公开(公告)日：2013-12-05
申请号：US13743837
申请日：2013-01-17
发明人： Min-Hui YANG
IPC分类号： C01D9/16
CPC分类号： C01D9/16
摘要： Provided is a method and an apparatus for purifying potassium nitrate from the solid waste produced by a chemical glass-strengthening process. In the method, the solid waste is melted into a liquid waste at first. Potassium nitrate of various purity grades can be obtained by batch processing the liquid waste through stepwise cooling processes of cooling the liquid waste to a first temperature facilitating the potassium nitrate contained in the liquid waste to be crystallized at a first rate and then cooling the liquid waste to a second temperature close to the freezing point of the potassium nitrate at a second rate that is slower than the first rate. The recovered potassium nitrate from the solid waste can be recycled and reused.
摘要翻译： 本发明提供一种通过化学玻璃强化工艺制备的固体废物中的硝酸钾的净化方法和装置。 在该方法中，首先将固体废物熔化成废液。 可以通过将液体废物冷却到第一温度的逐步冷却方法将液体废物分批处理成第一温度，从而使废液中所含的硝酸钾以第一速率结晶，然后冷却液体废物，从而获得各种纯度等级的硝酸钾 以比第一速率慢的第二速率接近硝酸钾的冰点的第二温度。 来自固体废物的回收的硝酸钾可以回收再利用。
-
公开(公告)号：US2852351A
公开(公告)日：1958-09-16
申请号：US66775457
申请日：1957-06-25
发明人： PFANN WILLIAM G
CPC分类号： C30B13/005 , C01D9/16 , H01L21/00
-
5.发明授权Method and apparatus for sequencing-batch purification of potassium nitrate from solid waste produced by glass-strengthening process 有权用于通过玻璃强化过程产生的固体废物对硝酸钾进行批量纯化的方法和装置公开(公告)号：US08956424B2
公开(公告)日：2015-02-17
申请号：US13743837
申请日：2013-01-17
发明人： Min-Hui Yang
IPC分类号： C01D9/16
CPC分类号： C01D9/16
摘要： Provided is a method and an apparatus for purifying potassium nitrate from the solid waste produced by a chemical glass-strengthening process. In the method, the solid waste is melted into a liquid waste at first. Potassium nitrate of various purity grades can be obtained by batch processing the liquid waste through stepwise cooling processes of cooling the liquid waste to a first temperature facilitating the potassium nitrate contained in the liquid waste to be crystallized at a first rate and then cooling the liquid waste to a second temperature close to the freezing point of the potassium nitrate at a second rate that is slower than the first rate. The recovered potassium nitrate from the solid waste can be recycled and reused.
摘要翻译： 本发明提供一种通过化学玻璃强化工艺制备的固体废物中的硝酸钾的净化方法和装置。 在该方法中，首先将固体废物熔化成废液。 可以通过将液体废物冷却到第一温度的逐步冷却方法将液体废物分批处理成第一温度，从而使废液中所含的硝酸钾以第一速率结晶，然后冷却液体废物，从而获得各种纯度等级的硝酸钾 以比第一速率慢的第二速率接近硝酸钾的冰点的第二温度。 来自固体废物的回收的硝酸钾可以回收再利用。
-
公开(公告)号：US4574075A
公开(公告)日：1986-03-04
申请号：US678858
申请日：1984-12-06
CPC分类号： C01D9/16 , Y02P20/134
摘要： A process is disclosed for removing heavy metal contaminants from impure alkali metal nitrates containing them. The process comprises mixing the impure nitrates with sufficient water to form a concentrated aqueous solution of the impure nitrates, adjusting the pH of the resulting solution to preferably within the range of between about 2 and about 4, adjusting the nitrite ion concentration to between about 0.07 molar and about 1.0 molar, to effect reduction of the heavy metal contaminants, adjusting the pH of the reduced solution to effect precipitation of heavy metal impurities, and separating the solid impurities from the resulting purified aqueous solution of alkali metal nitrates. The resulting purified solution of alkali metal nitrates may be heated to evaporate water therefrom to produce purified molten alkali metal nitrate suitable for use as a heat transfer medium. If desired, the purified molten form may be granulated and cooled to form discrete solid particles of alkali metal nitrates.
摘要翻译： 公开了从含有它们的不纯碱金属硝酸盐中除去重金属污染物的方法。 该方法包括将不纯的硝酸盐与足够的水混合以形成不纯的硝酸盐的浓缩水溶液，将所得溶液的pH调节至约2至约4的范围内，将亚硝酸根离子浓度调节至约0.07 摩尔和约1.0摩尔，以实现重金属污染物的减少，调节还原溶液的pH以实现重金属杂质的沉淀，并从所得纯化的碱金属硝酸盐水溶液中分离固体杂质。 得到的碱金属硝酸盐的精制溶液可以被加热以从其中蒸发水，以产生适合用作传热介质的纯化的熔融碱金属硝酸盐。 如果需要，可以将纯化的熔融形式造粒并冷却以形成离散的碱金属硝酸盐的固体颗粒。
-
公开(公告)号：US4568352A
公开(公告)日：1986-02-04
申请号：US613667
申请日：1984-05-24
CPC分类号： C01D9/16 , Y02P20/134
摘要： A process is disclosed for removing contaminants from impure alkali metal nitrates containing them. The process comprises heating the impure alkali metal nitrates in solution form or molten form at a temperature and for a time sufficient to effect precipitation of solid impurities and separating the solid impurities from the resulting purified alkali metal nitrates. The resulting purified alkali metal nitrates in solution form may be heated to evaporate water therefrom to produce purified molten alkali metal nitrates suitable for use as a heat transfer medium. If desired, the purified molten form may be granulated and cooled to form discrete solid particles of purified alkali metal nitrates.
摘要翻译： 公开了从含有它们的不纯碱金属硝酸盐中除去污染物的方法。 该方法包括在足以使固体杂质沉淀并从所得到的纯碱金属硝酸盐中分离出固体杂质的温度和时间下，以溶液形式或熔融形式加热不纯的碱金属硝酸盐。 可以将所得的溶液形式的纯碱金属硝酸盐加热，从而蒸发水，从而制备适合用作传热介质的纯化的熔融碱金属硝酸盐。 如果需要，可以将纯化的熔融形式造粒并冷却以形成分离的纯碱金属硝酸盐的固体颗粒。
-
公开(公告)号：US4421662A
公开(公告)日：1983-12-20
申请号：US414725
申请日：1982-09-13
摘要： A nonaqueous, in-line method for removing carbonate and hydroxide contamination from a molten mixed sodium nitrate/potassium nitrate heat transfer salt. The method comprises dissolving a stoichiometric quantity of anhydrous Ca(NO.sub.3).sub.2 in the melt whereby an insoluble CaCO.sub.3 and Ca(OH).sub.2 precipitate is formed. The precipitate can be removed by settling, filtration or floatation techniques.
摘要翻译： 一种用于从熔融混合硝酸钠/硝酸钾/热转移盐中除去碳酸盐和氢氧化物污染物的非水性直列法。 该方法包括将化学计量的无水Ca（NO 3）2溶解在熔体中，由此形成不溶的CaCO 3和Ca（OH）2沉淀。 可以通过沉降，过滤或漂浮技术除去沉淀物。
-
公开(公告)号：US20120195818A1
公开(公告)日：2012-08-02
申请号：US13380539
申请日：2010-06-27
申请人： Michael Bonan , Eyal Ginzberg , Akiva Mozes , Eyal Barnea , Hugo Keselman , Gideon Friedman , Ron Frim , Cornelis Petrus Langeveld
发明人： Michael Bonan , Eyal Ginzberg , Akiva Mozes , Eyal Barnea , Hugo Keselman , Gideon Friedman , Ron Frim , Cornelis Petrus Langeveld
CPC分类号： C01D9/04 , C01D3/04 , C01F5/14 , C01F5/22 , C01F11/46 , C05C5/02 , C22B3/065 , C22B3/44 , C22B26/10 , Y02P10/234
摘要： A process for producing KNO3 from polyhalite to is disclosed. In a preferred embodiment, the process comprises steps of (a) contacting polyhalite with HNO3; (b) adding Ca(OH)2 to the solution, thereby precipitating as CaSO4 at least part of the sulfate present in said solution; (c) precipitating as Mg(OH)2 at least part of the Mg2+ remaining in said solution by further addition of Ca(OH)2 to the remaining solution; (d) concentrating the solution, thereby precipitating as a sulfate compound at least part of the sulfate remaining in solution; (e) separating at least part of the NaCl from the solution remaining; and (f) crystallizing as solid KNO3 at least part of the K+ and NO3-contained in the solution. The process enables direct conversion of polyhalite to KNO3 of purity exceeding 98.5% and that is essentially free of magnesium and sulfate impurities.
摘要翻译： 公开了从多卤化物生产KNO 3的方法。 在优选的实施方案中，该方法包括以下步骤：（a）使多卤代硫酸盐与HNO 3接触; （b）向溶液中加入Ca（OH）2，从而以CaSO 4沉淀所述溶液中存在的至少一部分硫酸盐; （c）通过进一步向剩余溶液中加入Ca（OH）2，沉淀出Mg（OH）2至少部分Mg2 +残留在所述溶液中; （d）浓缩溶液，从而以硫酸盐化合物沉淀至少部分残留在溶液中的硫酸盐; （e）从剩余的溶液中分离至少部分NaCl; 和（f）作为固体KNO 3析出溶液中所含的K +和NO 3的至少一部分。 该方法能够将多卤盐酸盐直接转化为纯度超过98.5％的KNO 3，并且基本上不含镁和硫酸盐杂质。
-
公开(公告)号：US4517164A
公开(公告)日：1985-05-14
申请号：US613666
申请日：1984-05-24
CPC分类号： C01D9/16 , Y02P20/134
摘要： A process is disclosed for removing heavy metal contaminants from impure alkali metal nitrates containing them. The process comprises mixing the impure nitrates with sufficient water to form a concentrated aqueous solution of the impure nitrates, adjusting the pH of the resulting solution to within the range of between about 2 and about 7, adding sufficient reducing agent to react with heavy metal contaminants within said solution, adjusting the pH of the solution containing reducing agent to effect precipitation of heavy metal impurities and separating the solid impurities from the resulting purified aqueous solution of alkali metal nitrates. The resulting purified solution of alkali metal nitrates may be heated to evaporate water therefrom to produce purified molten alkali metal nitrate suitable for use as a heat transfer medium. If desired, the purified molten form may be granulated and cooled to form discrete solid particles of alkali metal nitrates.
摘要翻译： 公开了从含有它们的不纯碱金属硝酸盐中除去重金属污染物的方法。 该方法包括将不纯的硝酸盐与足够的水混合以形成不纯的硝酸盐的浓缩水溶液，将所得溶液的pH调节至约2至约7的范围内，加入足够的还原剂与重金属污染物 在所述溶液中，调节含有还原剂的溶液的pH以使重金属杂质沉淀，并从所得纯化的碱金属硝酸盐水溶液中分离出固体杂质。 得到的碱金属硝酸盐的精制溶液可以被加热以从其中蒸发水，以产生适合用作传热介质的纯化的熔融碱金属硝酸盐。 如果需要，可以将纯化的熔融形式造粒并冷却以形成离散的碱金属硝酸盐的固体颗粒。
-
-
-
-
-
-
-
-
-
搜索结果
20 条记录 (耗时 0.011 秒)
