33results about How to "Inexpensive and environmentally friendly" patented technology

The invention relates to the field of metallurgy, and specifically relates to a coating for magnesium alloy metal mold casting as well as a preparation method and applications thereof. The coating for magnesium alloy metal mold casting disclosed by the invention comprises the following compositions in percentage by mass: 10-45% of CaCO3, 5-25% of graphite powder, 1-15% of weak acid, 0.1-10% of suspending agent, and the balance of water. The coating disclosed by the invention can be used for effectively solving the problem that magnesium alloys are easily oxidated and burned; in the process of casting, the coating not only can ensure the forming of castings, but also can form a protective atmosphere, thereby ensuring that magnesium alloys do not produce reactive slag blowholes in the processes of mold filling and solidification; the coating can be specially used for magnesium alloy metal mold casting, and the quality of produced magnesium alloy castings is far higher than that of common coatings; and the coating is low in cost and extremely has a market value.

A roadway excavation method for electrode directional impact operation, in which a borehole is opened on the roadway excavation surface; one borehole is opened in the center as the first group of boreholes; six boreholes are arranged outside the central borehole as the second group of boreholes, Eight drill holes are arranged outside the second group of drill holes as the third group of drill holes; sixteen drill holes are arranged outside the third group of drill holes as the fourth group of drill holes; Carry out rock-breaking operations with technology; carry out rock-breaking operations for holes drilled between the first and second groups of holes; carry out rock-breaking operations for any two adjacent holes in the second group of holes; carry out the second and third groups of holes Rock-breaking operations for drilling holes between groups of drilling holes; performing rock-breaking operations for any two adjacent drilling holes in the third group of drilling holes; performing rock-breaking operations for drilling holes between the third and fourth groups of drilling holes; Carry out the rock-breaking operation of any two adjacent drilling holes in the fourth group of drilling holes; clean up the rock and continue the follow-up rock-breaking operation. The method has simple steps, high excavation efficiency and low cost.

The invention provides a preparation method of a ZnS / Ni2P composite micro-sphere with a core-shell structure. The preparation method comprises the following steps: firstly, preparing zinc sulfide powder; secondly, by taking the zinc sulfide powder, a soluble nickel salt and yellow phosphorus as main raw materials, slowing down a releasing speed of nickel ions by a chelation effect of citric acid on the nickel ions; and synthesizing the ZnS / Ni2P composite microsphere with the core-shell structure under the effect of a surfactant sodium dodecyl sulfate (SDS) at a low temperature under a hydrothermal condition. The preparation method is simple and feasible; and conditions are easy to control, the repeatability is good and post-period heat treatment is not needed. When the ZnS / Ni2P composite micro-sphere is subjected to a photocatalytic performance test, the photocatalytic performance is better than that of single zinc sulfide, so that the ZnS / Ni2P composite micro-sphere has a certain application potential in the aspect of photocatalytically degrading dyestuff wastewater.

An extract of fleece flower root containing 2, 3, 5, 4'-tetrahydroxy distyrene-2-0- beta-D-heteroside (not less than 50%) preparing the medicines to prevent and treat atherosclerosis is prepared through conventional extracting, chromatography by polyamide column, eluting, concentrating and drying.

The invention discloses a preparation method for a novel lithium vanadium phosphate / bamboo charcoal composite cathode material. The preparation method comprises the following steps of: uniformly mixing vanadium pentoxide, lithium hydroxide or lithium fluoride or lithium carbonate or lithium acetate, ammonium dihydrogen phosphate or phosphoric acid, salicylic acid or citric acid or ascorbic acid or tartaric acid or sucrose, and bamboo charcoal in proportion; evaporating water in a 50-80 DEG C water bath to form a sol; drying the sol in a vacuum drying oven for 8 hours at 120 DEG C to obtain a lithium vanadium phosphate precursor; cooling the lithium vanadium phosphate precursor to room temperature, grinding the precursor and putting the ground precursor into a die to prepare a cake under a certain pressure; putting the cake into a porcelain boat, and covering conductive carbon black (SP) powder on the cake; heating the cake in a microwave oven for a certain period of time; cooling the cake to room temperature; and taking the cake out, and grinding the cake to obtain a bamboo charcoal coated lithium vanadium phosphate / bamboo charcoal composite material sample, thus forming a bamboo charcoal connected conductive network. When used as a cathode material of a lithium ion power battery, the novel lithium vanadium phosphate / bamboo charcoal composite cathode material has the advantages of high capacity and magnification, long service life, low price and environmental friendliness.

A preparation method for an environmentally friendly super-hydrophobic coating with high mechanical durability, comprising the following steps: using filtered and purified waste edible oil as a raw material, synthesising the waste edible oil fatty amides by means of an amino decomposition reaction; using waste edible oil fatty amides and toluene diisocyanate as raw materials, employing a one-step process to prepare a polyurethane prepolymer; capping the polyurethane polymer by means of a double-ended ammonia-based silicone oil to obtain modified polyurethane; mixing the silicone-modified polyurethane with hydrophobically treated silicon carbide particles and, after magnetic stirring, spraying same onto a substrate, and drying and curing to obtain the super-hydrophobic coating.

The invention discloses a single unit three-dimensional digital film projecting system based on the chromatographic fractionating technology, and the system includes a digital film projector, a projection lens mounted at the output end of the digital film projector, receiving end three-dimensional glasses worn by audiences, a digital three-dimensional film editing software, a digital playing server, and a screen for the digital film projector to project, wherein the projection lens is a 3D projection lens with three optical axes; a projecting end multi-bandpass narrow-band pass filter is mounted at the image input end of the 3D projection lens with the three optical axes, the passed spectrum bands do not coincide or complement and correspond to an optical channel of the 3D projection lens with the three optical axes; the lens of the receiving end three-dimensional glasses worn by the audiences is the multi-bandpass narrow-band pass filter; and the digital three-dimensional film editing software can join the left-eye image and the right-eye image into an integral image in upper-lower or left-right sequence. The invention has the characteristics that the three-dimensional image is vivid and bright in color, and the watchers are very comfortable to watch.

The invention provides a preparation method and application of a nanometer niobium pentoxide / FTO aqueous supercapacitor electrode material. The preparation method comprises the following steps of 1, preparing a niobium pentoxide precursor mixed liquid, weighing powder of a niobium source and sodium acetate, adding the powder to deionized water, performing uniform ultrasound to obtain the niobium pentoxide precursor mixed liquid for use; 2, preparing the nanometer niobium pentoxide / FTO aqueous supercapacitor electrode material, transferring the niobium pentoxide precursor mixed liquid in the step 1 to a reaction kettle of a polytetrafluoroethylene substrate, adding a pre-processed FTO substrate to the reaction kettle, allowing a conductive surface of the FTO substrate to face upwards, sealing the FTO substrate, placing the reaction kettle in a baking oven for constant-temperature thermal reaction, cooling the furnace to a room temperature after reaction finish, taking out the FTO substrate, washing the FTO substrate, and performing vacuum drying, thereby obtaining the nanometer niobium pentoxide / FTO aqueous supercapacitor electrode material. The preparation method has the advantages of simplicity in process, low cost in raw material, no poison and no toxicity, and mass production is facilitated.

The invention discloses a Magneli phase titanium oxide nanowire array and a preparation method thereof. The component of the prepared array is a Magnel phase Ti8O15 nanowire, wherein the diameter of the nanowire is 20-100nm and the length of the nanowire is 50nm-5 microns. The preparation method comprises the following main steps: etching and cleaning the surface of metallic titanium; and by taking metallic titanium oxide as an oxygen source, treating titanium oxide powder at a high temperature in a hydrogen atmosphere, and cooling to form a black film on the surface of metallic titanium to obtain the material. The method disclosed by the invention is simple in preparation process and low in cost, and the prepared Magneli phase titanium oxide nanowire array can be used as an electrode material, an electrode supporting material and a catalyst carrier material and has a wide application prospect in the electrochemical and photoelectrochemical fields.

There is provided with a method for manufacturing an isoxazole derivative at a high yield and without discharging waste products, and a novel isoxazole derivative. An isoxazole derivative expressed by Formula (8) is produced by reacting a 1-alkyne compound expressed by Formula (7) with iron(III) nitrate in the presence of acetone or acetophenone:(where R1 is an alkyl, cycloalkyl, phenyl, or other such group); and(where R2 is a methyl or a phenyl).