公开(公告)号：EP2254848B1

公开(公告)日：2013-04-10

申请号：EP09709005.4

申请日：2009-02-05

申请人： Imi Tami Institute For Research And Development Ltd.

发明人： WEISSMAN, Aharon ,  GORELIK, Yelena ,  VULTZ, Eyal Yehihel ,  PERLE, Dorit ,  MASRI, Basam ,  SHIKOLSKY, Gideon ,  HANUKA, Ezrah ,  FRIM, Ron ,  GINZBERG, Eyal

IPC分类号： C04B22/12 ,  C04B28/34

CPC分类号： C04B28/34 ,  C04B22/126 ,  C04B2103/14 ,  C04B2103/24 ,  Y02W30/92 ,  C04B14/043 ,  C04B14/06 ,  C04B14/304 ,  C04B18/08

公开(公告)号：EP2477946A2

公开(公告)日：2012-07-25

申请号：EP10791742.9

申请日：2010-06-27

申请人： IMI Tami Institute For Research And Development Ltd.

发明人： BONAN, Michael ,  GINZBERG, Eyal ,  MOZES, Akiva ,  BARNEA, Eyal ,  KESELMAN, Hugo ,  FRIEDMAN, Gideon ,  FRIM, Ron ,  LANGEVELD, Cornelis Petrus

IPC分类号： C01D9/04

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 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。 在一个优选的实施方案中，该方法包括以下步骤：（a）使多卤盐与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，使Mg（OH）2至少残留在所述溶液中的部分Mg 2+沉淀; （d）浓缩溶液，从而以至少一部分残留在溶液中的硫酸盐化合物沉淀; （e）从残留的溶液中分离出至少部分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。 该方法能够将多卤化物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：EP2445850A1

公开(公告)日：2012-05-02

申请号：EP10791743.7

申请日：2010-06-27

申请人： IMI Tami Institute For Research And Development Ltd.

发明人： BONAN, Michael ,  GINZBERG, Eyal ,  MOZES, Akiva ,  BARNEA, Eyal ,  KESELMAN, Hugo ,  FRIEDMAN, Gideon ,  FRIM, Ron ,  LANGEVELD, Cornelis Petrus

IPC分类号： C05C5/02 ,  C22B26/00

CPC分类号： C22B3/065 ,  C05C5/02 ,  C22B3/20 ,  C22B26/10 ,  Y02P10/234

摘要： A method for the production of KNO
3 from polyhalite is provided. The method comprises steps of decomposing said polyhalite into syngenite, gypsum, and soluble components, treating the solid decomposition products sequentially with HNO
3 and Ca basic compound, precipitating the CaSO
4 thus formed, and crystallizing the KNO
3 from the solution remaining. The method recovers up to 75% of the potassium present in the raw polyhalite as KNO
3 and substantially all of the remainder as a potassium magnesium sulfate salt.

公开(公告)号：EP2254848A1

公开(公告)日：2010-12-01

申请号：EP09709005.4

申请日：2009-02-05

申请人： Imi Tami Institute For Research And Development Ltd.

发明人： WEISSMAN, Aharon ,  GORELIK, Yelena ,  VULTZ, Eyal Yehihel ,  PERLE, Dorit ,  MASRI, Basam ,  SHIKOLSKY, Gideon ,  HANUKA, Ezrah ,  FRIM, Ron ,  GINZBERG, Eyal

IPC分类号： C04B28/34

CPC分类号： C04B28/34 ,  C04B22/126 ,  C04B2103/14 ,  C04B2103/24 ,  Y02W30/92 ,  C04B14/043 ,  C04B14/06 ,  C04B14/304 ,  C04B18/08

摘要： A method is provided for advantageously altering the rate of hardening of a magnesium silico-phosphate cement (MSPC). Addition of on the order of 1% of an [MF6]n- salt or acid to an MSPC, obtained by adding the salt or acid either directly to the dry mix or to the water used to effect hydraulic hardening of the cement, significantly alters the hardening rate without adversely affecting the physical properties of the final set cement. In preferred embodiments, Na2TiF6 and/or K2TiF6 are used as retardants, while K3AlF6 is used as an accelerant. Other embodiments use M'nMF6 compounds wherein M' is an alkali metal, an alkaline earth metal, or H, and M is chosen from inter alia Ti (n = 2), Zr (n = 2), Si (n = 2), P (n = 1), Al (n = 3), and Sb (n = 1).

公开(公告)号：EP2707338A1

公开(公告)日：2014-03-19

申请号：EP11865432.6

申请日：2011-11-30

申请人： IMI Tami Institute For Research And Development Ltd.

发明人： VULTZ, Eyal, Yehiel ,  WEISSMAN, Aharon ,  MASSRI, Bassam ,  GINZBERG, Eyal ,  FRIM, Ron

IPC分类号： C04B12/02

CPC分类号： C04B28/34 ,  C04B14/304 ,  C04B20/1055 ,  C04B20/107 ,  C04B22/126 ,  C04B2103/20 ,  C04B14/043 ,  C04B14/06 ,  C04B14/068

摘要： A mixture suitable for use in forming a magnesium silico-phosphate cement is disclosed. The mixture comprises particles of MgO at least partially coated with an additive adapted to alter the setting time of said cement cast; a phosphate salt or acid chosen that will provide a binder product characterized by the empirical chemical formula MMgPO
4 ⋅6H
2 O; and an aggregate phase chosen from the group containing (a) CaSiO
3 , (b) MgSiO
3 , (c) SiO
2 , (d) fly ash, (e) sea sand, and (f) any combination thereof. Coating the MgO particles provides better control of the alteration of the setting time and better physical properties of the set cement. Methods for making the mixture and for preparing a cement cast based on the mixture are also disclosed.