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| Number | Title | Issue Date |
| 7332141 | Process to separate the vanadium contained in inorganic acid solutions A chemical process that recovers the vanadium contained in inorganic acid solutions, precipitating it as a solid compound of vanadium and alkali metal or monovalent cation ferrocyanide, is disclosed. Separation is carried out electrochemically, depositing the compou... | 02/19/2008 |
| 7211235 | Method for producing hydrotalcites A method is described for the manufacture of hydrotalcites by using at least one compound of a bivalent metal (Component A) and at least one compound of a trivalent metal (Component B), wherein at least one of these components is not used in the form of a solution, ... | 05/01/2007 |
| 6921737 | Method of synthesizing a double metal cyanide catalyst An improved method for synthesizing a double metal cyanide (DMC) catalyst combines and sonicates aqueous and non-aqueous solutions of a first metal salt, such as Zn(OAc)2, of a second metal salt, such as CoCl2, and of an alkali metal cyanide, s... | 07/26/2005 |
| 6869905 | Synthesis of double metal cyanides with non-aqueous solutions An improved method for synthesizing a double metal cyanide (DMC) catalyst includes combining a non-aqueous solution of a first metal salt, such as ZnBr2, with a non-aqueous solution of a second metal salt, such as CoBr2, and with a non-aqueous ... | 03/22/2005 |
| 6855658 | Hydroxide containing double metal cyanide (DMC) catalysts The present invention provides a crystalline, hydroxide containing double metal cyanide (DMC) catalyst of the formulae (I) or (II), M1x[M2(CN)6]yOH.L (I) M1x[M | 02/15/2005 |
| 6800583 | Suspension of multimetal cyanide compounds, their preparation and their use Catalyst suspensions for the ring-opening polymerization of alkylene oxides comprise a) at least one multimetal cyanide compound having a crystalline structure and a content of platelet-shaped particles of at least 30% by weight, based on the multimetal cyani... | 10/05/2004 |
| 6797665 | Double-metal cyanide catalysts for preparing polyether polyols The invention relates to double-metal cyanide catalysts for preparing polyols by the polyaddition of alkylene oxides on to starter compounds containing active hydrogen atoms, wherein the DMC catalysts are composed of: a) at least one double-metal cyanide compound; b... | 09/28/2004 |
| 6613714 | Multimetal cyanide compounds, their preparation and their use In multimetal cyanide complexes, more than 30% by weight of the primary particles have a platelet-like habit, i.e. the length and width of the primary particles is at least three times the thickness of the particles.... | 09/02/2003 |
| 6358424 | Process for removing cyanide ion from cadmium plating rinse waters An improved process for the removal of cyanide ion from aqueous dispersions (e.g., aqueous spent cadmium plating solutions or plating rinse water solutions) is provided wherein a source of Fe+2 ion is reacted with a cyanide ion-containing aqueo... | 03/19/2002 |
| 5955048 | Process for making flash activated hydrotalcite There is provided a flash activated hydrotalcite which, when extruded to sizes of about 1/16 inch or more, has a crush load strength of at least about 7 pounds. The process for making this extrudate includes: (a) providing a hydrotalcite compound; (b) hea... | 09/21/1999 |
| 5858321 | Preparation of substituted aromatic amines A method for producing aromatic amines such as N-phenyl-p-phenylenediamine is disclosed wherein an amine substituted aromatic such as aniline is oxidized with oxygen or hydrogen peroxide in the presence of trisodium pentacyano ferrate(II) complexes contai... | 01/12/1999 |
| 5837145 | Method for treating water contaminated with cyanide A method for treating cyanide contaminated water is disclosed. This method generally involves passing the contaminated water through a bed containing elemental iron, to form a precipitate by a reaction between the iron and any of various cyanide species w... | 11/17/1998 |
| 5776424 | Two powder synthesis of hydrotalcite and hydrotalcite-like compounds with monovalen inorganic anions There is provided a method for making a monovalent inorganic anion-intercalated hydrotalcite-like material by first reacting a magnesium-containing powder and a transition alumina powder in a carboxylic acid-free, aqueous suspension to form a meixnerite ... | 07/07/1998 |
| 5730951 | Two powder synthesis of hydrotalcite and hydrotalcite-like compounds with polyvalent inorganic anions There is provided a method for making a polyvalent inorganic anion-intercalated hydrotalcite-like material by first reacting a magnesium-containing powder and a transition alumina powder in a carboxylic acid-free, aqueous suspension to form a meixnerite ... | 03/24/1998 |
| 5728364 | Two powder synthesis of hydrotalcite and hydrotalcite like compounds There is provided an improved method for making synthetic hydrotalcite by first reacting a divalent metal compound with a trivalent metal oxide powder in a carboxylic acid-free, aqueous solution or suspension to form an intermediate. This intermediate is ... | 03/17/1998 |
| 5728366 | Two powder synthesis of hydrotalcite and hydrotalcite-like compounds with monovalent organic anions There is provided a method for making monovalent organic anion-intercalated hydrotalcite-like materials by first reacting a magnesium-containing powder and a transition alumina powder in a carboxylic acid-free, aqueous suspension to form a meixnerite inte... | 03/17/1998 |
| 5728363 | Two powder synthesis of hydrotalcite and hydrotalcite-like compounds There is provided an improved method for making synthetic hydrotalcite by first reacting powdered magnesium oxide with a high surface area, transition alumina in a solution or suspension to form a meixnerite-like intermediate. This intermediate is then co... | 03/17/1998 |
| 5728365 | Two powder synthesis of hydrotalcite and hydrotalcite-like compounds with divalent inorganic anions There is provided a method for making a divalent inorganic anion-intercalated hydrotalcite-like material by first reacting a magnesium-containing powder and a transition alumina powder in a carboxylic acid-free aqueous suspension to form a meixnerite inte... | 03/17/1998 |
| 5647996 | Groundwater total cyanide treatment method A method and apparatus for the removal of total cyanide from aqueous solution. The method includes the steps of placing the aqueous solution into a reaction tank, adding lime, ferrous sulfate, and acid to the solution in the reaction tank and agitating th... | 07/15/1997 |
| 5616168 | Hydrometallurgical processing of impurity streams generated during the pyrometallurgy of copper Impurity streams generated during the metallurgy of copper are hydrometallurgically processed at ambient pressure for recovery of primary values in an energy-efficient manner and with the capture and conversion of metallic impurities to states that are ac... | 04/01/1997 |
| 5578286 | Two powder synthesis of hydrotalcite-like compounds with divalent or polyvalent organic anions There is provided a method for making a divalent or polyvalent organic anion-intercalated hydrotalcite-like materials by first reacting a magnesium-containing powder and a transition alumina powder in an aqueous suspension to form a meixnerite intermediat... | 11/26/1996 |
| 5160632 | Cyanide removal from coke oven wash waters A process for removing cyanide anions from waste waters using halogen-free ferric salts is disclosed. The process is particularly effective when treatment of cyanide waste waters is done by adding ferric sulfate while adjusting pH of the waste waters with... | 11/03/1992 |
| 5071813 | ETA phase materials, methods of producing the same, and use thereof as catalysts for alcohol synthesis, hydrocarbon synthesis, hydrocarbon hydrogenation and hydrocarbon conversion reactions An eta phase composition in powder form, prepared in the absence of sulfur or sulfur bearing compounds, having a surface area greater than about 2m2 /g and consisting of X6 Y6 Za wherein X is at least one elemen... | 12/10/1991 |
| 4840735 | Process for the removal of cyanide and other impurities from solution A process for the removal of cyanide and other impurities from an aqueous solution is disclosed. The process comprises adding copper ion and ferrous ion as reagents to the solution at a pH of about 4 to 8 with a ratio of copper to cyanide in the range of ... | 06/20/1989 |
| 4698098 | Method of producing an algae growth-repellent underwater coating and the resultant product A method of producing an algae growth-repellent underwater coating and the resultant product is to be such that it can be operated and performed without causing environmental pollution. For that purpose, there is added to an underwater paint or the like, a ... | 10/06/1987 |
| 4654148 | Process for the removal of iron cyanide complex or complexes from an aqueous solution A process for removal of iron cyanide complex or complexes from a solution is described, the process being characterized by contact of the solution containing the complex or complexes with ammonium polysulfide or sodium polysulfide, or a mixture thereof, ... | 03/31/1987 |
| 4615873 | Treatment of cyanide-ferrocyanide effluents A process for treatment of cyanide-containing aqueous effluents in which ferrocyanide present is precipitated with a metal other than copper, preferably zinc either prior to or simultaneously with the treatment of the effluent with sulfur dioxide and air ... | 10/07/1986 |
| 4606829 | Removal of complexed zinc-cyanide from wastewater with improved sludge stability A method of removing complexed zinc-cyanide from wastewater involving a multiple stage process including, in a first step, control of ferrous ions to a critical minimum concentration of 250 to 400 ppm, together with pH control in the first and also a seco... | 08/19/1986 |
| 4543189 | Removal of complexed zinc-cyanide from wastewater A method of removing complexed zinc-cyanide from wastewater involving a multiple stage process including, in a first step, control of ferrous ions to a critical minimum concentration of 250 to 400 ppm, together with pH control in the first and also a seco... | 09/24/1985 |
| 4530768 | Method for the disposal of waste water containing iron-cyanide complexes The invention provides an improvement in the disposal of a waste water coining iron-cyanide complexes including ferricyanides by the reduction of the ferricyanide ions into ferrocyanide in the presence of a zinc salt to precipitate the ferrocyanide ions ... | 07/23/1985 |
| 4525217 | Process for preparing ferriferrocyanide pigments The subject invention relates to a process for preparing ferriferrocyanide pigments. The process comprises (a) forming an aqueous reaction mixture comprising (i) a ferrous salt, (ii) a compound selected from the group consisting of sulfuric acid, hydrochloric ... | 06/25/1985 |
| 4414033 | Process for preparing ferriferrocyanide pigments The subject invention relates to a process for preparing ferriferrocyanide pigments. The process comprises (1) forming a reaction mixture containing a ferrous salt and an alkali metal ferrocyanide; (2) adding an alkaline compound to said reaction mixture in an... | 11/08/1983 |
| 4401640 | Hydrogenation catalysts Iron (II) hexacyanocobaltate and ruthenium (III) hexacyanocobaltate have been found to be useful in the catalytic hydrogenation of organic materials.... | 08/30/1983 |
| 4378995 | Iron blue pigment, process for making the same and use Iron blue pigment (DIN 55 906) is produced by white paste precipitation and subsequent oxidation of the white paste. Alakli or alkali metal ions i.e. sodium and potassium ions, cyanide or complex iron cyanide ions and iron ions are used as raw materials. ... | 04/05/1983 |
| 4324666 | Method of removing ferrocyanide ions from rinse water of an alkaline cyanide metal plating process A method of removing ferrocyanide ions from the rinse water of an alkaline cyanide metal plating process which comprises adding a sufficient amount of manganous ions to the rinse water containing ferrocyanide ions to form a water insoluble precipitate of ... | 04/13/1982 |
| 4309311 | Ammonia synthesis with catalyst derived by heating on a support a salt selected from alkali metal, alkaline earth metal, iron and cobalt hexacyanocobaltates and hexacyanoruthenates Synthesis of ammonia employing at least one salt selected from alkali metal-, an alkaline earth metal-, iron- and cobalt hexacyanocobaltate and hexacyanoruthenate on a suitable support and then heating the composition to provide it with suitable activity.... | 01/05/1982 |
| 4267159 | Cyanide recovery Spent aqueous liquor containing cyanide, as from ore treatment, is passed through a bed of suitable anion-exchange resin to segregate the cyanide, which is subsequently recovered in regeneration of the resin by weak alkaline solution. Both the eluted cyan... | 05/12/1981 |
| 4246910 | Cigarette filter material comprising compounds of iron in high oxidation states Inert gas-permeable granular support materials impregnated with alkali ferrates wherein the ferrates are iron compounds having an oxidation state of +4, +5, or +6 are disclosed. When they are used as a granular filter material in combination with a tobacc... | 01/27/1981 |
| 4211646 | Waste water process A method is provided for the treatment of a waste water stream characterized by having toxic and corrosive properties due to the presence of a cyanides formates and a halide of a metal or ammonia comprising adding a ferrous ion to said waste water to conv... | 07/08/1980 |
| 4171350 | Method for reacting hydrogen and oxygen in the presence of a liquid phase The rates of reaction between two gases is controlled by bringing the gases (hydrogen and oxygen) into an aqueous medium and into contact with a Contacogen which is wetproofed with respect to the medium. Even if the reaction between the gases in gas phase... | 10/16/1979 |
