Patents Assigned to Kali und Salz Aktiengesellschaft
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Patent number: 5383952Abstract: Dust is bound in fertilizer granules by spraying the granules with a solution of molasses and another oxygen-containing hydrocarbon from the group glycerin, polyethylene glycol and triethanolamine.Type: GrantFiled: March 16, 1994Date of Patent: January 24, 1995Assignee: Kali und Salz AktiengesellschaftInventors: Arno Singewald, Otto Wendt, Gunter Nurnberger, Dieter Paetz, Wolfgang Walczyk, Klaus-Dieter Muller
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Patent number: 5370235Abstract: Plastic mixtures, in particular those of a similar density such as polyethylene and polypropylene, are separated electrostatically, whereby prior to charging, the mixture is subjected to a surface treatment.Type: GrantFiled: April 9, 1993Date of Patent: December 6, 1994Assignee: Kali und Salz AktiengesellschaftInventors: Ingo Stahl, Axel Hollstein, Ulrich Kleine-Kleffmann, Iring Geisler, Ulrich Neitzel
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Patent number: 5366091Abstract: Plastic mixtures, in particular those of a smilar density such as polyethylene terephthalate and polyvinyl chloride, are separated electrostatically, whereby the mixture, for triboelectric charging, is subjected to a thermal treatment.Type: GrantFiled: April 9, 1993Date of Patent: November 22, 1994Assignee: Kali und Salz AktiengesellschaftInventors: Ingo Stahl, Axel Hollstein, Ulrich Kleine-Kleffmann, Iring Geisler, Ulrich Neitzel
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Patent number: 5358119Abstract: Plastic mixtures are split up into the individual components by a process combining density separation with electrostatic separation, and includes a special surface treatment which takes place prior to the electrostatic separation.Type: GrantFiled: April 9, 1993Date of Patent: October 25, 1994Assignee: Kali und Salz AktiengesellschaftInventors: Ingo Stahl, Axel Hollstein, Ulrich Kleine-Kleffmann, Iring Geisler, Ulrich Neitzel
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Patent number: 5057208Abstract: In a method for manufacturing potassium chloride with a K.sub.2 O content of 55 wt. % from the fine salt resulting from the decomposition of carnallite, n-alkyl amine salts are used as conditioning agents, and flotation media containing magnesium and potassium chloride are used to separate this fine decomposition salt in an initial flotation stage into a grain size fraction of <0.1 mm as the first pre-concentrate and a residue having a grain size of >0.315. After the conditioning, this residue is again floated and the potassium chloride comes to the surface as a second pre-concentrate. Then the potassium chloride is separated from the mixture of the two pre-concentrates, without any further conditioning, in another flotation stage, and collected.Type: GrantFiled: October 6, 1988Date of Patent: October 15, 1991Assignee: Kali und Salz AktiengesellschaftInventors: Fritz Hagedorn, Gerd Peuschel, Arno Singewald
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Patent number: 5035872Abstract: A method of preparing potassium magnesium phosphate hexahydrate by reacting calcium dihydrogen phosphate with potassium sulfate and a basic magnesium compound is described.Type: GrantFiled: May 3, 1990Date of Patent: July 30, 1991Assignee: Kali und Salz AktiengesellschaftInventors: Karl-Richard Loblich, Susanne Lange
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Patent number: 4848675Abstract: In a method of granulating kieserite or kieserite-potassium sulfate mixtures, a portion of a delivery product is milled to dust fineness, the total product with addition of a water-soluble phosphate is fully granulated, and dried to a definite residual moisture.Type: GrantFiled: May 25, 1988Date of Patent: July 18, 1989Assignee: Kali Und Salz AktiengesellschaftInventors: Karl-Richard Loeblich, Guenter Bruns, Helmut Zentgraf, Ernst Czaplinsky
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Patent number: 4797201Abstract: An electrostatic free-fall separator has roller-shaped field electrodes which are formed as hollow rollers closed at both their ends without forming sharp edges and having horizontally extending longitudinal axes arranged at a field distance parallel to one another.Type: GrantFiled: September 12, 1983Date of Patent: January 10, 1989Assignee: Kali und Salz AktiengesellschaftInventors: Helmuth Kuppers, Hans-Jurgen Knauer
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Patent number: 4767506Abstract: A process is disclosed for the preparation of milled crude potash salts containing kieserite, whereby the crude potash salt is conditioned at first with a chemical conditioning agent and subsequently with an auxiliary conditioning agent, whereupon the crude potash salt is fed to an electrostatic free fall separator.Type: GrantFiled: August 3, 1987Date of Patent: August 30, 1988Assignee: Kali und Salz AktiengesellschaftInventor: Gunter Fricke
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Patent number: 4743362Abstract: A process for controlling the electrostatic separation of crushed chemically conditioned and triboelectrically charged potash salts in a free fall wherein the setting angles of deviating blades for the separated material are controlled by means of a process computer in dependency on the K.sub.2 O-content of the residue which accumulates in the proximity of the negative, separating electrode. The mutual position of the blades determines the K.sub.2 O and NaCl discharge and the amount of the obtained middling material.Type: GrantFiled: September 17, 1985Date of Patent: May 10, 1988Assignee: Kali und Salz AktiengesellschaftInventors: Oskar Pfoh, Christian Radick, Helmut Thenert
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Patent number: 4339274Abstract: Binding materials based upon magnesium compounds. Dry magnesium hydroxide and magnesium chloride are mixed in powder form, the weight ratio of the magnesium oxide contained in the magnesium hydroxide to magnesium chloride lying between about 0.8 and 2.0. Magnesium chloride may be used in the form of its hexahydrate, and, additionally, in the form of dihydrates. The dry product may be stored for months, in plastic sacks or bags, without coking. Thereafter, mixing the dry product with water yields magnesium oxide mortar.Type: GrantFiled: June 3, 1980Date of Patent: July 13, 1982Assignee: Kali und Salz AktiengesellschaftInventors: Hubert Duyster, Gunter Voigt, Gerhard Budan
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Patent number: 4117078Abstract: Concentrated magnesium chloride solutions are prepared from industrial liquors or brines by debrominating the liquor with chlorine, neutralizing the debrominated liquor up to a ph value of 3-6, adding a stoichiometric excess of calcium chloride to the neutralized liquor at temperatures in the range of 30.degree.-50.degree. C to form a calcium sulfate dehydrate crystallizate, separating the crystallizate from the mother liquor, adding a sufficient amount of carnallite to the mother liquor to increase the MgCl.sub.2 content thereof to 270-330 g/l after cold decomposition of the added carnallite and concentrating the resulting solution in two or more steps in the direct current in an evaporator with crystallization characteristics up to a final concentration of 440 to 470 g/l MgCl.sub.2 whereafter the concentrated magnesium chloride solution is separated from crude crystallized carnallite and sodium chloride formed during the concentration.Type: GrantFiled: March 29, 1977Date of Patent: September 26, 1978Assignee: Kali und Salz AktiengesellschaftInventor: Dietmar Kunze
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Patent number: 4075309Abstract: Concentrated magnesium chloride solutions are prepared from industrial liquors or brines by evaporating the liquor in a vacuum in two or more stages in a counter current evaporator with crystallization characteristics up to a final concentration of 440 to 475 g/l MgCl.sub.2, a solid content of 12 to 25% by weight and a final temperature of 95.degree. to 105.degree. C, whereafter the liquor is separated from crude crystallized carnallite and sodium chloride, is debrominated by the addition of chlorine, is neutralized by the addition of lime or dolomite milk, is separated in the heat from solid substances, is cooled to effect further crystallization, and is finally separated as a concentrated magnesium chloride solution containing 400 to 465 g/l MgCl.sub.2.Type: GrantFiled: March 29, 1977Date of Patent: February 21, 1978Assignee: Kali und Salz AktiengesellschaftInventors: Dietmar Kunze, Siegfried Kirchner
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Patent number: 3941685Abstract: An improved process is disclosed for electrostatic separation of pyrite from powdered crude coal comprising vigorously mixing the powdered crude coal with a selected fatty acid glyceride as a conditioning substance and conducting the electrostatic separation at a relative humidity of 2.5-20% and a temperature between room temperature and 100.degree. C. In a multiple stage process yields of purified coal substantially greater than those of prior art processes can be obtained.Type: GrantFiled: August 15, 1974Date of Patent: March 2, 1976Assignee: Kali und Salz AktiengesellschaftInventors: Arno Singewald, Gunther Fricke