36 results about "Copper(II) hydroxide" patented technology

A wood preservative includes injectable particles comprising one or more sparingly soluble copper salts. The copper-based particles are sufficiently insoluble so as to not be easily removed by leaching but are sufficiently soluble to exhibit toxicity to primary organisms primarily responsible for the decay of the wood. Exemplary particles contain for example copper hydroxide, basic copper carbonate, copper carbonate, basic copper sulfates including particularly tribasic copper sulfate, basic copper nitrates, copper oxychlorides, copper borates, basic copper borates, and mixtures thereof. The particles typically have a size distribution in which at least 50% of particles have a diameter smaller than 0.25 μm, 0.2 μm, or 0.15 μm. At least about 20% and even more than 75% of the weight of the particles may be composed of the substantially crystalline copper salt. Wood or a wood product may be impregnated with copper based particles of the invention.

A method for preserving wood by injecting into the wood a slurry having: particles of a sparingly soluble copper salt, copper hydroxide, or both, wherein the weight average diameter d50 of the particles in the slurry is between 0.1 microns and 0.7 microns and the d98 of the particles in the slurry is less than about 1 micron; a dispersant; and water. The dispersant is anionic or a mix of anionic and non-ionic. Advantageously, less than 20% by weight of the particles have a diameter less than 20 nanometers. Useful copper salts include basic copper carbonate, tri-basic copper sulfate, copper oxychloride, basic copper nitrate, basic copper borate, copper borate, basic copper phosphate, or copper silicate. The slurry most preferably includes copper hydroxide particles. The slurry further advantageously includes at least one organic biocide, wherein at least a portion of the organic biocide is coated on the particles.

The present invention relates to a composite material for a negative electrode, including: a plurality of iron oxide particles; and a conductivity improver, which is selected form the group consisting of copper, cobalt, nickel, tin, antimony, bismuth, indium, silver, gold, lead, cadmium, carbon black, graphite, copper salt, cobalt salt, nickel salt, tin salt, antimony salt, bismuth salt, indium salt, silver salt, gold salt, lead salt, cadmium salt, copper hydroxide, cobalt hydroxide, nickel hydroxide, stannic hydroxide, antimony hydroxide, bismuth hydroxide, indium hydroxide, silver hydroxide, gold hydroxide, lead hydroxide, cadmium hydroxide and the combination thereof. In the case of applying the composite material for a negative electrode according to the present invention in an electrochemical device, the improved charge / discharge characteristics and high capacity can be achieved. In addition, the present invention further provides a method for fabricating the above-mentioned composite material for a negative electrode and an electrochemical device using the same.

The invention relates to a method for continuously preparing copper hydroxide through an electrolysis method, and belongs to the technical field of copper hydroxide preparation. The method comprises the steps that sodium hydroxide or sodium carbonate is adopted to adjust the pH value of a sodium sulfate aqueous solution or a potassium sulfate aqueous solution to be 9-10, and a copper hydroxide collector is added and mixed evenly to obtain an electrolyte; copper electrodes serve as an anode and an cathode of an electrolytic pool, the electrolyte is added into the electrolytic pool, under the condition of the temperature of 20-30 DEG C, a direct current with the voltage being 1.5-2.0 V is lead to conduct electrolysis to obtain hydrogen and copper hydroxide / copper hydroxide collector foam, and the copper hydroxide / copper hydroxide collector foam is scraped and collected through a scraping plate of the electrolytic pool; and under the stirring condition, water with the temperature being 60-100 DEG C is added into the copper hydroxide / copper hydroxide collector foam for washing, repeated washing is conducted through water with the temperature being 60-100 DEG C for 2-3 times, filtrationand vacuum drying are conducted, and the copper hydroxide is obtained.

A coated seed comprises a seed and a coating at least partially surrounding the seed. The coating comprises a fungicide, a micronutrient metal, and a chelating agent, the fungicide comprising copper (II) hydroxide, wherein the amount of copper (II) hydroxide is from about 0.05 mg / seed to about 0.21 mg / seed.A method for applying a seed treatment to a seed or a population of seeds comprises distributing on the surface of the seed or the population of seeds a seed treatment formulation comprising a fungicide, a micronutrient metal, and a chelating agent. The fungicide comprises copper (II) hydroxide in an amount ranging from about 2 wt. % to about 20 wt. % of the total seed treatment formulation.

The invention discloses a piece of steamed rice dumpling leaf capable of removing free copper and a preparation method thereof. The steamed rice dumpling leaf is put into quick lime filtration liquid for soaking treatment after being blanched in boiling water containing copper sulfate. The quick lime filtration liquid has the processing steps of putting 5 to 15 parts of humidified and dissolved quick lime into 85 to 95 parts of clear water to be uniformly stirred, and obtaining lime milk; adopting a 100-mesh gauze screen to filter the lime milk, and obtaining the quick lime filtration liquid. The steamed rice dumpling leaf has the processing steps of putting the steamed rice dumpling leaf into clear water to clean and soak for one hour; putting the soaked steamed rice dumpling leaf into boiling water to blanch for 5 to 10 minutes; cutting off leaf stalks of the blanched steamed rice dumpling leaf, and then putting the steamed rice dumpling leaf into the quick lime filtration liquid to soak for two hours; cleaning for five minutes by clear water; drying under low temperature; packaging. Since the blanched steamed rice dumpling leaf can be subjected to the soaking treatment by the quick lime filtration liquid, the free copper in the steamed rice dumpling leaf reacts with calcium hydroxide to form copper hydroxide precipitate, and thus the situations of emesis, diarrhea and heavy metal poisoning caused by excess copper ion intake by a human body can be avoided.

The preparation process of crystallized copper powder includes the following steps: dissolving amino acid or its salt as reaction promoter and alkyl quarternary ammonium salt surfactant as dispersant inside polar liquid phase reaction medium; adding copper oxide or hydroxide as reaction initiator and hydrazine or its compound as reductant; and reaction at 40-100 deg.c to synthesize copper powder. The prepared copper powder is in spherical or polyhedral shape, and has good dispersivity, average size of 0.5-5 micron and homogeneous size distribution.