83 results about "Copper chromite" patented technology

Copper chromite particles can advantageously be used as black particles in electrophoretic media and displays. Preferably, the copper chromite particles are coated with a silica coating and a polymer coating.

The invention discloses a method for preparing a nano-size catalyst of copper chromite and copper ferrite, and belongs to the technical field of nano-size catalyst preparation. The method of the invention comprises a sol-gel process and a vacuum freezing drying (VFD) process. Firstly, a mixed solution is prepared from a soluble copper salt and a soluble chromium salt or iron salt, added with a surface active agent, and mixed uniformly, and then the system is added with a precipitating agent to carry out precipitation reaction under the condition that the pH value is between 6.8 and 9.5, then is kept stand, aged, washed and melted in a water bath for 2 to 8 hours at a temperature of between 70 and 95 DEG C, thus sol is obtained; then the sol is subjected to freezing drying in a vacuum freezing dryer to obtain dried gel which is a precursor of the catalyst; finally, the dried gel is roasted to obtain the nano-size catalyst of copper chromite (CuCr2O4) or copper ferrite (CuFe2O4). The catalyst prepared by the method has the advantages of high purity, small grain diameter, good dispersivity, high catalytic activity, and the like.

A resin composition with laser marking properties, comprising a polycarbonate resin, an effective amount of copper chromite having a spinel structure and carbon black at most 0.05% by weight of the total composition, wherein the polycarbonate resin Foam over the laser-irradiated area to create a bright colored mark of the laser-irradiated area on a dark background.

The invention discloses a copper-chrome black pigment and a preparation method thereof. The copper-chrome black pigment is prepared from the following raw materials in percentage by weight: 20-35 percent of copper oxide, 35-55 percent of chromium oxide, and 20-45 percent manganese dioxide. The particle diameter D50 of copper oxide, chromium oxide and manganese dioxide is less than or equal to 2 microns. The copper-chrome black pigment prepared by the method has the advantages of fine particles, uniform particle distribution, and complete copper chromite crystal, so that the copper-chrome blackpigment has strong coloring power, high stability and low product cost, and can satisfy the requirements on the copper-chrome black pigment in various fields.

The invention discloses a method for preparing gamma-valerolactone by levulinic acid ester without solvents, and relates to gamma-valerolactone. A copper chromite catalyst is added into the levulinic acid ester and reacts in hydrogen atmosphere to obtain solid-liquid mixture, pressure is reduced, suction filtration is performed to obtain binary liquid mixture containing gamma-valerolactone and corresponding alcohols, and the alcohols are recovered by distillation to obtain the gamma-valerolactone. Cheap and easily separated copper chromite serving as the catalyst is added into the levulinic acid ester from biomass, and the gamma-valerolactone is prepared at one step in a solvent-free system. The copper chromite catalyst is activated in situ in the system, so that a traditional catalyst pre-hydrogenation step is omitted. The method is simple and efficient, and an effective way is provided for large-scale preparation of biomass-based gamma-valerolactone.

The present invention relates to a process for obtaining neopentyl glycol by hydrogenating cracking of high-boilers occurring in the production process in the presence of copper-chromite catalysts. The hydrogenating cracking proceeds in the absence of solvent at a temperature of 140 to 220° C. and at pressures of 7 to 28 MPa.

A catalytic dehydrogenation of alkylene glycol ether to ether ketone or aldehyde is disclosed. The dehydrogenation is performed with copper chromite catalyst and at least 5 wt % of water based on alkylene glycol ether. It has been found that the selectively to formation of ether ketone or aldehyde increases with increasing the amount of water in the alkylene glycol ether.

The invention discloses a high-temperature resistant anticorrosion paint with high irradiation rate and a preparation method thereof. The high-temperature resistant anticorrosion coating with high irradiation rate is prepared from the following raw material ingredients in parts by weight: 20-25 parts of methoxyphenyl organosilicon, 10-15 parts of methyl organosilicon, 0.5-1.0 part of tetrabutyl titanate, 0.5-1.0 part of tetramethyl guanidine, 2-4 parts of zinc powder, 4-6 parts of aluminum powder, 8-10 parts of manganese ferrite black spinel and 2-4 parts of copper chromite black spinel. A coating obtained by the paint has the advantages of high temperature resistance, anti-corrosion property and high irradiation rate.

The invention relates to paint with high temperature resistance and a preparation method, in particular to two-component paint with high temperature resistance and a preparation method. The two-component paint with high temperature resistance is prepared from a first component and a second component, wherein the first component is prepared from phenyl methyl silicone resin, a wetting dispersant, a copper chromite black pigment, mica powder, barium phosphonate, zinc phosphate, glass powder and n-butyl acetate in proportion; the second component is prepared from gamma-aminopropyltriethoxysilane and absolute ethyl alcohol in equal proportion through mixing, the two components in a ratio being (100:1)-(105:1) in parts by weight are mixed, and the two-component paint with high temperature resistance is obtained. The temperature resistance, the discoloration resistance and the alternate cooling and heating resistance of the two-component paint with high temperature resistance are greatly improved, and adhesive force and corrosion resistance of the two-component paint with high temperature resistance are excellent.

The invention discloses a high-temperature corrosion resistant ceramic coating. The high-temperature corrosion resistant ceramic coating is characterized by comprising the following substances in parts by weight: 1-32 parts of silica sol, 5-17 parts of rare earth cerium oxide powder, 10-32.5 parts of silica sol, 15-48 parts of talcum powder, 21-39 parts of petalite, 11-40 parts of carbon fiber, 7.8-19.5 parts of tetramethyl ammonium hydroxide, 3-12 parts of silica sand, 4-18 parts of zinc borate, 9-27 parts of ethyl silanol sodium, 21-56 parts of copper chromite black, 3-18 parts of aluminium oxide, 1-14 parts of silicon carbide, 2-14 parts of water-soluble resin emulsion and 30-71 parts of water. The high-temperature corrosion resistant ceramic coating can be high-temperature resistant, high in emissivity, fouling and slagging resistant, high-temperature corrosion resistant, anti-abrasive, and free of falling or bulking, and is made of carbon steel, so that the service life is long.

The invention relates to a method of preparing isopropanol by cellulose. The method is characterized in that the catalytic reaction is carried out on cellulose in the presence of a copper chromite catalyst so that the cellulose is converted into isopropanol, wherein the copper chromite catalyst comprises a CuCr2O4 active phase or an active phase of a group formed by CuO and Cr2O3, the mass ratio of the cellulose to water is below 15 wt%, and the temperature of the catalytic reaction is 200-270 DEG C.

The invention discloses a catalyst for preparing 1, 6-hexanediol through hydrogenating dimethyl adipate. The catalyst is composed of a carrier and an active component dispersedly loaded on the carrier, wherein the active component is composed of a first active component and a second active component, the first active component is ruthenium and/or iridium, and the second active component is copperchromite; the carrier is a lanthanum doped SiO2/ZrO2 carrier; and the carrier is of a mesoporous structure, and the pore size of the carrier is 10-50 nm. The catalyst provided by the invention not only has the advantages of high dimethyl adipate conversion rate and strong 1, 6-hexanediol selectivity, but also has the excellent performances of large specific surface area, high active component loading capacity, stable performance and long service life. The invention further discloses a preparation method and application of the catalyst for preparing 1, 6-hexanediol through hydrogenating dimethyl adipate.

The invention discloses high-emissivity ceramic paint. The high-emissivity ceramic paint is characterized by comprising the following substances in parts by weight: 31-56 parts of copper chromite black, 3.8-4.4 parts of dispersing agent, 11.7-15 parts of silica sol, 3.4-5.9 parts of rear earth cerium oxide powder, 1-5 parts of silica sol, 25-30 parts of talcum powder, 1-3 parts of zinc borate, 3.5-14.7 parts of sodium silicate, 5-12.7 parts of polyethylene methyl ether methacrylate, 3-8 parts of tri-isotripolyisocyanate, 11-18 parts of sulfonated melamine formaldehyde condensation compound, 0-15 parts of sodium ethyl siliconate, 15.4-30.7 parts of aluminum oxide, 5.1-10.7 parts of defoaming agent, 1-14 parts of silicon carbide, 1.5-13 parts of water-soluble resin emulsion and 40.5-60 parts of water. The high-emissivity ceramic pain has the beneficial effects of high temperature resistance, high emissivity, fouling and slagging resistance, high temperature corrosion resistance, wear resistance, no dropping and bulging phenomena, capacity of being applied to carbon steel, and long service life.

The invention relates to a syndiotactic polystyrene flame-retardant composite material. The syndiotactic polystyrene flame-retardant composite material comprises the following components in parts by weight: 15-40 parts of syndiotactic polystyrene, 5.7-20 parts of polyhexamethylene adipamide, 16-20 parts of flame retardant, 4-6 parts of flame-retardant synergistic agent, 3.5-6 parts of compatilizer, 1-5 parts of laser etching powder, 0.3-0.6 part of coupling agent, 0.4-0.7 part of antioxidant and 10-50 parts of glass fiber, wherein the laser etching powder is selected from at least one of silicon dioxide, titanium dioxide, zinc sulfide, chromic oxide, neodymium oxide, bismuth oxide, tin oxide, zinc molybdate, ammonium molybdate, basic cupric phosphate, copper oxide, copper chromite black, copper carbonate, copper sulfate, copper chloride, copper chromite and carbon black. The syndiotactic polystyrene flame-retardant composite material is simple to machine, and has favorable mechanical property, flame retardancy and heat resistance.

The invention discloses a high-performance corrosion-resistant ceramic coating which is characterized by comprising the following substances in parts by weight: 55-80 parts of copper chromite black, 1-10 parts of dispersing agent, 10-30 parts of plaster, 5-17 parts of coal cinder powder, 6-14 parts of potassium oxide, 3-5 parts of sericite, 1.5-4.2 parts of magnesium oxide, 17-28 parts of apatite, 3-20 parts of zirconite, 15-34 parts of dolomite, 13-40 parts of zirconium silicate, 20-40 parts of polyvinyl alcohol, 11-20 parts of expanded perlite powder, 11-30 parts of synthetic rubber, 50-69 parts of mullite, 3.4-5.9 parts of rare earth cerium oxide powder, 1-8 parts of silicon carbide and 50-90 parts of water. The high-performance corrosion-resistant ceramic coating is high-temperature-resistant, high in emissive power, anti-fouling and anti-scaling, high-temperature corrosion-resistant, wear-resistant and incapable of falling off and bulking; the service life of the carbon steel is long.