WO2002076378A2 - Proceso para producir un hidróxido cúprico estable y sales cúpricas básicas - Google Patents
Proceso para producir un hidróxido cúprico estable y sales cúpricas básicas Download PDFInfo
- Publication number
- WO2002076378A2 WO2002076378A2 PCT/MX2002/000021 MX0200021W WO02076378A2 WO 2002076378 A2 WO2002076378 A2 WO 2002076378A2 MX 0200021 W MX0200021 W MX 0200021W WO 02076378 A2 WO02076378 A2 WO 02076378A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cupric
- ion
- hydroxide
- carried out
- copper
- Prior art date
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G3/00—Compounds of copper
- C01G3/02—Oxides; Hydroxides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B15/00—Obtaining copper
- C22B15/0063—Hydrometallurgy
- C22B15/0084—Treating solutions
- C22B15/0089—Treating solutions by chemical methods
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/60—Optical properties, e.g. expressed in CIELAB-values
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Definitions
- the invention pertains to highly stable cupric hydroxide compounds obtained by removing iron impurities from the initial copper solution.
- Stable copper hydroxide is a difficult product to obtain, even when a highly purified copper salt is used as the starting material. This is because even small amounts of ferrous impurities (Fe ”) can catalyze the decomposition of cupric hydroxide for cupric oxide:
- Copper compounds including copper hydroxide, are used to treat fungi in plants.
- the pathogenic fungus causes a substantial reduction in crops. Higher losses result from the creation of fungi during crop storage. Although there are more than 100,000 species, it is known that no more than 200 cause serious diseases in plants.
- Classes of fungi associated with important diseases in crops include: Phytomycetes, Asomycetes, Basidiomycetes and Deuteromycetes.
- phytomycetes include Phytophthora infestans (potato mildew) and viticultural Plasmopara (grape mildew).
- Asomycetes include Erysiphe graminis (Oidio del wheat / barley), Podosphaera leucot ⁇ cha (oid 10 of the apple) and Py ⁇ cula ⁇ a oryzae (rice anublo)
- Basidiomycetes include Puccinia spp (brown rust of wheat and oats), Rhizoctonia spp (wilted rice pod) and Usti ago spp (corn coals)
- Examples of Deuteromycetes include Alternar ⁇ a spp (tobacco altern ⁇ osis), Botrytis spp (gray mold of grapes), Cercospora spp (leaf spot of sugar beet), Fusarium spp (wilting of wheat), Helminthosporium spp (corn leaf spot),
- Fungicides can be classified into systemic and non-systemic fungicides.
- Systemic fungicides can penetrate into the seed or plant and then redistribute into non-sprayed or newly growing parts, which provides protection against fungal attacks or eradicates a fungus.
- Present Non-systemic fungicides have a protective mode of action and should be applied to the surface of the plant, usually before infection takes place.
- inorganic salts are classified as non-systemic fungicides.
- Copper sulphate was used from the treatment of wheat blight disease generated in the seed (Tilletia spp) in the early 18th century. In 1882, it was observed that the vineyards that had been Coated with a mixture of copper sulfate and lime to prevent theft of the vine, they were not infected with grape mildew (Plasmopara viticultural) This observation resulted in the development of a fungicide called Bordeaux mixture
- the copper fungicides available in the Current events for a wide variety of applications include sulfates (Bordeaux mixture), oxides and oxychlorides and a variety of organic salts such as copper and quino naphthenates born from copper Protected crops using copper compounds include vineyards, fruit trees, coffee, cocoa and Vegetables Most copper fungicides work by inhibiting the germination of fungal spores.
- Sensitive fungi are affected by absorption of copper salts and their subsequent accumulation, which then creates compounds with amino, sulfhydryl, hydroxyl or carboxyl groups of enzymes that result in the inactivity of the fungus.
- Fungicides are described in the Kirk-Othmer Encyclopedia of Chemical Technology, Fourth Edition (1994), Volume 12, on pages 204-227.
- Copper compounds are also effective against bacteriological diseases in plants.
- a bacteriological disease of the plant suitable for the treatment of copper compounds, including cupric hydroxide, is the citrus canker. When environmental conditions are favorable for the spread of the disease, chemical control measures are not fully effective.
- materials containing copper are the most effective bacteriological sprays to protect the leaves and fruit. These materials can reduce the incidence of the disease, but will not eliminate the infections already present. The widespread use of copper can also cause phytotoxicity problems in treated plantations.
- Copper hydroxide is also used to treat the bacterial spot of tomato (Xanthomonas campestris pv. Vesicatoria). Copper hydroxide is applied at the first disease symptom and is repeated at intervals of 10 to 14 days when humid, temperate conditions prevail. Copper is strictly a protector and must be applied before the infection period occurs. The coverage area is 1.81 kg of copper hydroxide per acre.
- the most common copper fungicide that incorporates copper hydroxide is the Bordeaux mixture (CuS0 4 .3Cu (OH) 2 .3CaS0).
- the standard formula for the Bordeaux mixture is 1.81 kg of copper sulfate, 1.81 kg of hydrated lime and 189.2 I of water. 1.81 kg of lime are mixed in 15.14 I of water.
- the Bordeaux mixture is not stable.
- the poorly stirred Bordeaux mixture has little value because the active copper compound was not finely divided properly.
- other materials are added in the Bordeaux mixture in order to increase stability. If other materials are used in the mixture, then they can be added with greater agitation.
- the white oil can be used for approximately 500 ml / 100 I of dew or similar amounts of calcium caseinate (500 g / 100 I) molasses (500 ml / 100 I) can be used.
- White oil or dew summer oil can be used at a rate of 500 ml / 100 I of dew to improve the penetration of dew below the scales.
- calcium caseinate and molasses are recommended in seasons for certain crops. They have registered that they improve the ability of atmospheric alteration of the dew by producing a layer in the upper leaves, which protects the copper particles from being dropped by rain or irrigation.
- Fungicides such as the Bordeaux mixture are also characterized by their poor adhesion in plants.
- the adhesion ability of the Bordeaux mixture can also be improved by the addition of polymers.
- polymer additives tend to be expensive.
- the slaked lime is replaced with a completely soluble crystalline soda (calcium carbonate).
- the procedure is exactly the same and the final results are similar, although it is believed that the mixture adheres better than the Bordeaux mixture, but it also tends to burn the sensitive foliage.
- the main advantage of the Burgundy mixture is the ease of use of the soda in crystals compared to the lime turned off. In case of using fresh soda, the old material may have less crystallization water and it is difficult to determine the required amount.
- fungicide / bactericide which belongs to a dry fungicide / bactericide, which can flow from hydroxide of copper and a method for making and using it
- the fungicide / bactericide of patents '253 and' 738 is made by forming a homogeneous aqueous paste containing between about 5% and 20% by weight (based on the total weight of the dry ingredients) of a first dispersant selected from the group consisting of a partially neutralized pohacrylic acid having a pH of 5-10 and a promising molecular weight gave between 1,000 and 10,000 and a lignin sulphonate.
- a second dispersant is used for bentonite clay.
- a paste with phosphate stabilized cupric hydroxide is formed and the paste is dried with dew to form a dry fungicidal / granular bactericidal product. , free flowing Although phosphate stabilized cupric hydroxide is mentioned, this solution is obtained from an aqueous paste that uses a acrylic acid as dispersant
- the '681 patent of Pasek belongs to a method for producing a copper oxide
- the copper carrier material, aqueous ammonia and a sufficient amount of ammonium salts to double the proportion of copper oxide production in the absence of salt are placed in a single container.
- the container is closed and oxygen is supplied into the container.
- the mixture was stirred and heated at a temperature between about 70 ° and 130 ° C to dissolve the carrier material.
- the '681 patent is a process based on ammoniacal copper The presence of a colloid is not indicated
- the '533 patent of Browne pertains to a method for producing copper compounds, which involves contacting the metallic copper with oxygen or an oxygen-containing gas, with an aqueous solution that It consists essentially of water in solution, in which a soluble ammonium salt NH 4 X is found, wherein X is the anion of the salt and with ammonia in an amount such that the solution is initially alkaline.
- the metallic copper initially dissolves to form a 4 X Cu (NH 3 ) copper amine and the formation of an amine continues until the saturation concentration of the amine is reached. Subsequently, the amine is continuously fractionated to form 3Cu (OH) 2 CuX 2 and the water-soluble products of the decomposition of the amine continuously reform the amine by another reaction with the metallic copper and oxygen in the gas containing oxygen.
- the '533 patent is a production of copper compounds that uses ammoniacal copper and the presence of a phosphate is not indicated.
- the '935 patent of Langner et al (United States Patent No. 4,944,935) pertains to a process for producing blue copper hydroxide, wherein the copper metal is treated with an aqueous ion-containing ammonium solution, with stirring and with a simultaneous introduction of oxygen-containing gas and the reaction product is separated from the copper metal.
- a floating, particulate copper (II) hydroxide is produced since the material containing the copper metal is treated at a temperature of 0 or 40 ° C with a solution containing 0.1 to 10 g / l of ammonium salt ( calculated as NH 4 ), 0 to 10 g / l of ammonium hydroxide (calculated as NH 3 ) and if desired, 0 to 5 g / l of copper salt and the resulting copper (II) hydroxide is separated.
- the '935 patent pertains to the production of copper hydroxide using ammonium-based compounds.
- Example 6 describes the ammonium salts selected from chlorides, sulfates, phosphates, nitrate and acetate. However, a process without ammonia-based base is not described.
- the '406 patent of Brinkman belongs to a method for producing a stable, finely divided hydrochloric composition of a low apparent density comprising contacting solutions of an alkali metal carbonate or bicarbonate and a copper salt, precipitate the copper sulfate based on basic copper carbonate at a minimum pH, within the range greater than 5 to about 6, contact the precipitate with the metal hydroxide alkaline and convert basic copper sulfate into cupric hydroxide, within the pH range of 7 to 11.
- the '406 patent pertains to the production of cupric hydroxide from a mixture of a basic copper carbonate and a basic copper sulfate .
- the '337 patent of Nakaji et al. (United States Patent No. 4,940,337) provides a stirring apparatus for mixing, with the metallic iron masses, a highly concentrated acidic ferric chloride waste fluid with iron content, and one or more heavy metals, in the which nickel content is the highest, the stirring apparatus is characterized in that it comprises a rotation mechanism for rotating a container, and a passage arranged in a rotating arrow and through which the excess gas and the generated liquid are discharged during stirring outwards.
- the '337 patent pertains to the separation of metals from the waste of ionic chloride. The production of a pure copper hydroxide is not described.
- the '169 patent of Ploss et al. (United States Patent No. 4,404,169) relates to a process for producing cupric hydroxides that have storage stability in case phosphate ions are added in a suspension of copper oxychloride in an aqueous phase.
- the copper oxychloride is then reacted with the alkali metal hydroxide or alkali earth metal hydroxide and the copper hydroxide precipitate as a result of the suspension is washed and then resuspended and subsequently stabilized by the addition of a phosphate acid to adjust it to a pH value of 7.5 to 9,
- a phosphate acid to adjust it to a pH value of 7.5 to 9
- Preferably suspended copper oxychloride is reacted in the presence of phosphate ions in an amount of 1 to 4 grams per liter of the suspension and at a temperature of 20 ° to 25 ° C and the resulting cupric hydroxide is stabilized with phosphate ions in an amount of 3 to 6 grams per liter of the suspension.
- phosphate ions in an amount of 1 to 4 grams per liter of the suspension and at a temperature of 20 ° to 25 ° C and the resulting cupric hydroxide is stabilized with phosphate ions in an amount of 3 to 6 grams per
- cupric hydroxide As shown, there are significant disadvantages associated with the poor stability of conventionally prepared cupric hydroxide. Even small amounts of ferrous ion will catalyze the decomposition of cupric hydroxide into cupric oxide. This poor stability inhibits the use of cupric oxide as a bactericide and fungicide. Additional uses of highly pure cupric hydroxide are in the manufacture of superfine metallic copper, in the preparation of catalysts and in superconductors. These disadvantages can be eliminated and advantages are achieved by the development of a process that can easily produce stable and purified cupric hydroxide.
- the invention relates, in part, to stable cupric hydroxide.
- the invention belongs in part to a cupric solution essentially free of ferrous, ferric and aluminum ions.
- the invention relates in part to the removal of iron from a copper solution by oxidation and precipitation of a ferric solution.
- the invention in part, pertains to the use of a phosphate ion to increase the effectiveness of oxidation and to simultaneously precipitate the ferric ion formed.
- the invention in part, pertains to the manufacture of cupric hydroxide from impure raw materials as the mother liquor of copper sulfate production.
- Copper can be taken in the oxidation states Cu + and Cu 2 + copper.
- Cupric hydroxide, also called copper (II) hydroxide compounds of the invention are represented by the formula I: Cu (OH) 2
- Copper (II) hydroxide is prone to decomposition with the oxide, as represented by the Formula II: Cu (OH) 2 ⁇ CuO + H 2 0
- this decomposition is catalyzed by metallic species such as iron.
- metallic species such as iron.
- the real catalytic species is Fe 2+ occluded (insterstitially) in the reticular structure of Cu (OH) 2 , which changes its molecular structure when oxidized with Fe 3+ and destroys the crystal of Cu (OH) 2 to form a more stable product, CuO.
- the CuO produced catalyzes the dehydration reaction that forms more CuO. Therefore, inhibition of this reaction is necessary to obtain a more stable product.
- Copper (II) hydroxide is described in Kirk Othmer Encvclopedia of Chemical Technologv as produced by a reaction of a solution of copper salt and sodium hydroxide to form a voluminous, gelatinous, blue precipitate of limited stability.
- the measures focus on stabilizing the product, especially in industrial production.
- ammonia or phosphates are incorporated into the hydroxide to produce a stable product with color.
- Copper hydroxide processed with ammonia is practically stoichiometric and a copper content is as high as 64% is not uncommon.
- the material produced with phosphate is smaller in copper and has a finer particle size and a higher surface area than hydroxide processed with ammonia.
- Other production methods are generally related to the formation of an insoluble copper precursor of hydroxide formation. (Kirk Othmer Encvclopedia of Chemical Technologv, Fourth ed. Vol. 7, pp 508 (John Wiley & Sons 1993)). However, the products produced by these methods are not what stable enough to
- Copper hydroxide is almost insoluble in water (3 ⁇ g / L), but easily dissolves in mineral acids and ammonia, forming salt solutions or copper amine complexes. It is something amphoteric hydroxide dissolved in a solution of sodium hydroxide to form trihidroxicuprato excess Cu (OH) 3 and tetrahidrocuprato Cu (OH) 4.
- Copper (II) hydroxide is conventionally prepared by the addition of sodium hydroxide, NaOH, to a copper salt and decomposes at a temperature above 100 ° C. In the presence of excess alkali, decomposition occurs at temperatures above 50 ° C.
- ferrous impurities are present in raw materials that contain copper
- the inventors have found it feasible to precipitate the ferrous ion in an aqueous solution by oxidizing it with the ferric ion, especially with ferric phosphate.
- the ferrous ion is oxidized using common oxidants such as H 2 0 2 hypochlorite (chlorine), Cl 2 , 0 2 , 0 3 , etc.
- the possible range of oxidizing agents includes simple oxygen, triple oxygen, simple or triple oxygen with gas content, ozone, ozone with gas content, chlorine, chlorine with gas content, chlorine dioxide, chlorine dioxide with gas content, hypochlorite ion, and chlorite ion.
- Air blown through the solution will also oxidize a ferrous ion into ferric ion, but oxygen in the air oxidizes the ion more slowly.
- Mixtures of oxidizing agents can also be used, i
- the heating temperature may vary from about 20 ° C to 130 ° C.
- a preferred range of heat temperature is about 80-100 ° C.
- a preferred temperature is about 100 ° C.
- the use of a suitable counterion will make oxidation more effective and promote the precipitation of iron salt.
- the use of a phosphate ion increases the effectiveness of oxidation and simultaneously precipitates the ferric ion. Alternatively, the fluoride ion has been found to be effective.
- aqueous cupric ion precipitates to form a basic salt such as a tribasic sulfate CuS0 4 3Cu (OH) 2 , cupric oxychloride CuCI 2 3Cu (OH) 2 , basic cupric carbonate CuC0 3 3 Cu (OH) 2 , etc., by increasing the pH of the solution.
- the inventors found that the formation of basic salts begins with a pH of approximately 3.5 and is completed with a pH of approximately 7.
- the preferable pH to obtain a basic copper salt is a pH of approximately 6.
- precipitation of the ion Ferric as oxide or ferric phosphate is more effective with a higher pH.
- the most suitable pH for precipitation of the ferric ion is approximately 1-4 and preferably approximately 3.5.
- the most common bases can be used to raise the pH of the range 1-
- Preferred bases include NH 3 , Na 2 C0 3 , K 2 C0 3 and aqueous KHC0 3 .
- Hardly soluble ferric compounds such as ferric oxide and ferric phosphate in copper hydroxide do not greatly reduce the stability of copper hydroxide against decomposition to form CuO and H 2 0. However, it is preferred to remove the precipitate formed from the solution oxidized cupric in order to obtain a purer product.
- Basic copper salts such as CuS0 4 3 Cu (OH) 2 , CuCI 2 3Cu (OH) 2 , CuC0 3 3Cu (OH) 2 , etc. , they rush out. These salts can then be harvested.
- the bases used to precipitate cupric hydroxide can be an alkali metal hydroxide and / or an alkaline earth metal hydroxide .
- the bases include KOH, NaOH, LiOH, Ca (OH) 2 , Mg (OH) 2 , etc.
- the bases used to precipitate cupric hydroxide can also be a carbonate such as K 2 C0 3 or Na 2 C0 3 .
- the basic copper salts (CuS0 3 3Cu (OH) 2 , CuCI 2 3Cu (OH) 2.
- CuC0 3 3Cu (OH) 2 , etc.) can be converted into copper hydroxide by rinsing the salts and adding a base.
- a strong base such as NaOH or KOH is capable of providing an unstable product against the dehydration decomposition reaction, supposedly caused by the drastic change in the pH at the interface of the added base solution and the copper content solution that forces non-selective precipitation for existing species.
- a weak base such as sodium carbonate or bicarbonate and NH 3 is preferred.
- the removal of ferrous ion is highly satisfactory when copper sulfate is used as raw material.
- copper chloride solutions and copper sulfate solutions are more difficult to purify. The reason for this difficulty associated with copper chloride may be, in view of the surprisingly high coordination potential of the chloride ion compared to the sulfate ion, which leads to soluble coordination products, especially at chloride concentrations greater than about 2M.
- Copper hydroxide can be prepared by using a mother liquor left after crystallization of copper sulfate using the ferrous removal method of the invention.
- the ferric hydroxide product was stable enough so that the product can be dried by spray drying.
- the removal of solids formed during the process can be carried out using a number of methods.
- the solids can be removed using filtration, centrifugation or decantation. On an industrial scale, filter presses or drum centrifuges can be used.
- EXAMPLE 3 Preparation of copper hydroxide from the mother liquor.
- a load of 3000 I of water with a 3L content of 85% of H 3 P0 and 25 I of 5% of H 2 0 2 was added with vigorous stirring to 3000 I of mother liquor left after crystallization of sulfate from copper.
- the mother liquor contained 79 g of Cu ion per liter. 15 M aqueous NH 3 were added to the solution until a pH of 3.5 was reached.
- the resulting mixture was heated to 85 ° C and maintained at that temperature overnight while maintaining a pH of 3.5 when injecting 8M NH 3 when necessary.
- the solution was allowed to cool to 50 ° C. A precipitate formed and was removed using a filter press.
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Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
MXPA03008468A MXPA03008468A (es) | 2001-03-20 | 2002-03-20 | Proceso para producir un hidroxido cuprico estable y sales cupricas basicas. |
AU2002246444A AU2002246444A1 (en) | 2001-03-20 | 2002-03-20 | Method for producing stable cupric hydroxide and basic cupric salts |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/811,669 US6596246B2 (en) | 2001-03-20 | 2001-03-20 | Process for producing stable cupric hydroxide and basic cupric salts |
US09/811,669 | 2001-03-20 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2002076378A2 true WO2002076378A2 (es) | 2002-10-03 |
WO2002076378A3 WO2002076378A3 (es) | 2002-12-05 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/MX2002/000021 WO2002076378A2 (es) | 2001-03-20 | 2002-03-20 | Proceso para producir un hidróxido cúprico estable y sales cúpricas básicas |
Country Status (3)
Country | Link |
---|---|
US (1) | US6596246B2 (es) |
AU (1) | AU2002246444A1 (es) |
WO (1) | WO2002076378A2 (es) |
Cited By (2)
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JP2008511536A (ja) * | 2004-09-02 | 2008-04-17 | イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー | 水酸化銅を安定化させる方法 |
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US20020136781A1 (en) * | 2001-03-20 | 2002-09-26 | Julio Huato | Method for making colloidal cupric compounds and their uses |
US8747908B2 (en) | 2003-04-09 | 2014-06-10 | Osmose, Inc. | Micronized wood preservative formulations |
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CA2530044C (en) * | 2003-06-17 | 2012-09-25 | Phibro-Tech, Inc. | Particulate wood preservative and method for producing same |
US20060062926A1 (en) * | 2004-05-17 | 2006-03-23 | Richardson H W | Use of sub-micron copper salt particles in wood preservation |
US20050252408A1 (en) | 2004-05-17 | 2005-11-17 | Richardson H W | Particulate wood preservative and method for producing same |
US20060075923A1 (en) * | 2004-10-12 | 2006-04-13 | Richardson H W | Method of manufacture and treatment of wood with injectable particulate iron oxide |
US7316738B2 (en) * | 2004-10-08 | 2008-01-08 | Phibro-Tech, Inc. | Milled submicron chlorothalonil with narrow particle size distribution, and uses thereof |
US20050255251A1 (en) * | 2004-05-17 | 2005-11-17 | Hodge Robert L | Composition, method of making, and treatment of wood with an injectable wood preservative slurry having biocidal particles |
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US20070259016A1 (en) * | 2006-05-05 | 2007-11-08 | Hodge Robert L | Method of treating crops with submicron chlorothalonil |
US7411080B2 (en) * | 2006-05-19 | 2008-08-12 | Phibro-Tech, Inc. | Direct synthesis of copper carbonate |
US20090324481A1 (en) * | 2008-06-27 | 2009-12-31 | Jeff Miller | Low energy method of preparing basic copper carbonates |
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DE1592441A1 (de) * | 1951-01-28 | 1970-12-17 | Kennecott Copper Corp | Elektrolytisches Verfahren zur Gewinnung von Kupferhydroxid |
USRE24324E (en) * | 1951-05-05 | 1957-05-28 | Method of making stable cupric | |
US3635668A (en) * | 1969-03-21 | 1972-01-18 | Cities Service Co | Copper hydrate production |
US3725535A (en) * | 1970-10-22 | 1973-04-03 | Cities Service Co | Manufacture of basic cupric compounds |
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US4490337A (en) * | 1981-03-26 | 1984-12-25 | Kocide Chemical Corporation | Preparation of cupric hydroxide |
DE3145995A1 (de) * | 1981-11-20 | 1983-06-01 | Norddeutsche Affinerie AG, 2000 Hamburg | Verfahren zur herstellung von kupfer-ii-hydroxid |
US4418056A (en) * | 1982-12-27 | 1983-11-29 | Cuproquim S.A. | Process for making cupric hydroxide |
DE3419089A1 (de) * | 1984-05-23 | 1985-11-28 | Norddeutsche Affinerie AG, 2000 Hamburg | Verfahren zur herstellung von kupfer-ii-hydroxid |
US4808406A (en) * | 1984-12-05 | 1989-02-28 | Kocide Chemical Corporation | Preparation of cupric hydroxide compositions |
JPH0812328A (ja) * | 1994-07-04 | 1996-01-16 | Nippon Chem Ind Co Ltd | 水酸化第二銅の製造法 |
-
2001
- 2001-03-20 US US09/811,669 patent/US6596246B2/en not_active Expired - Fee Related
-
2002
- 2002-03-20 AU AU2002246444A patent/AU2002246444A1/en not_active Abandoned
- 2002-03-20 WO PCT/MX2002/000021 patent/WO2002076378A2/es not_active Application Discontinuation
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008511536A (ja) * | 2004-09-02 | 2008-04-17 | イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー | 水酸化銅を安定化させる方法 |
CN104472544A (zh) * | 2014-12-10 | 2015-04-01 | 潍坊科技学院 | 一种番茄茎部病害防治组合物及其应用 |
CN104472544B (zh) * | 2014-12-10 | 2017-05-10 | 潍坊科技学院 | 一种番茄茎部病害防治组合物及其应用 |
Also Published As
Publication number | Publication date |
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US20020136685A1 (en) | 2002-09-26 |
WO2002076378A3 (es) | 2002-12-05 |
US6596246B2 (en) | 2003-07-22 |
AU2002246444A1 (en) | 2002-10-08 |
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