112results about How to "Recycling" patented technology

The invention discloses a method for producing regenerated polyester ultrafine fiber based on bicomponent fiber production equipment. The method comprises the following steps: a regenerated polyester slice and a water soluble polyester slice are used as raw materials; after the two raw materials are subjected to crystallizing and drying, extruding and fusing respectively, the two raw materials are fed to a composite spinning manifold, are extruded through an insulated spinning metering pump with accurate measurement, and are distributed to each composite spinning component; the two components are compounded to be shaped according to shapes set by a spinneret component, are extruded to be shaped through side ram cooling and oiled by a nozzle tip, and are wound by a winding head to form a regenerated polyester ultrafine POY spinning cake; and then the spinning cake is processed to obtain an applicable ultrafine fiber through subsequent texturing. After the method is adopted, through adjusting the processing technology, the regenerated polyester raw material can be applied to high grade fiber so as to improve effective application of resource, and save cost. The method has double significances of economy and environmental protection.

The present invention relates to a zero-waste process for extraction of alumina from different types of bauxite ores and red mud residues and of titanium dioxide from ilmenite. Iron oxide is first reduced to metallic iron above the melting point of C-saturated cast iron alloy which yields a high-C iron alloy and an Al and Ti metal oxide rich slag which is then treated with alkali carbonate to form alkali aluminates and titanates. The alkali aluminates are separated by water leaching from which the hydroxide of alumina is precipitated by bubbling C02. The residue from water leaching is treated with sulphuric acid and Ti02 is precipitated via a hydrolysis route. The process recovers most of the metal values and generates only small quantities of silicious residues at pH 4-5 which can be used for soil conditioning. The present also relates to a method for selective separation of Ti02-rich oxides from titaniferrous ore/residue materials via oxidative roasting in the presence of alkali carbonate or carbonates followed by aqueous leaching of the roasted material and selective precipitation of Ti02 under controlled condition below pH=4.

The invention discloses a light-quality partition of pulverized fuel ash. The raw materials of the light-quality partition comprise pulverized fuel ash, cement, perlite, polypropylene fiber, water reducing agent, acrylic emulsion, foaming agent and water, and each component of the raw materials is calculated in ratio by weight: 40-60 portions of the pulverized fuel ash, 15-25 portions of the cement, 5-10 portions of the perlite, 0.1-0.5 portions of the polypropylene fiber, 0.5-1.0 portions of the water reducing agent, 1.0-5.0 portions of the acrylic emulsion, 0.1-0.5 portions of the foaming agent and 20-30 portions of the water. The invention takes the pulverized fuel ash as the main raw material; besides, various components are added into the pulverized fuel ash so as to be mixed organically. The invention not only conforms to the energy saving, waste utilizing, environmental protection policy advocated by the State, but also improves the intensity and toughness of the plates and leads the plates to be uneasy to be broken.

The invention discloses a mechanical and plant purification system for artificial culturing tail water, and aims to provide the artificial culturing tail water mechanical and plant purification system capable of recycling aquaculture waste water. The system comprises a precipitation tank, an aeration tank, mechanical filter equipment, algae purification tank and an ozone disinfection tank, wherein the precipitation tank is communicated with the aeration tank; the mechanical filter equipment comprises a water pumping pipe, a water pump and a first draining pipe; one end of the water pumping pipeline is connected with the aeration tank, and the other end of the water pumping pipeline is connected with the water inlet of the water pump; the water inlet port of the first draining pipe is communicated with the water outlet of the water pump, and the water outlet port of the first draining pipe is connected with the algae purification tank; and the algae purification tank is communicated with the ozone disinfection tank.

The invention discloses a method for preparing sheets from potatoes or potato residues and discarded vegetable fibers. The method comprises the following steps of mixing cooked potatoes or potato residues and discarded vegetable fiber powder uniformly, putting the mixture into a die, and forming, polishing, demoulding and drying to obtain sheets. The sheets of the invention have the characteristics of light weight, no toxicity, low cost, simple preparation process, and recycle waste, and contribute to environmental protection, and can be widely applied in fields of decoration, packaging and the like.

The invention discloses a preparation method of 3,4-dimethylpyrazole and a preparation method of 3,4-dimethylpyrazole phosphate. The methods comprise the following steps: performing condensation by using 2-butanone and formate as raw materials, performing aminolysis, performing cyclization to prepare the 3,4-dimethylpyrazole; and performing a salt forming reaction on the 3,4-dimethylpyrazole and phosphoric acid to obtain the 3,4-dimethylpyrazole phosphate. The preparation method of the 3,4-dimethylpyrazole and the preparation method of the 3,4-dimethylpyrazole phosphate provided by the invention have the significant advantages that the raw materials are cheap and easy to obtain, the operation is simple and convenient, the yield is high, the product quality is high, the solvent can be recovered and reused, and the methods are suitable for industrial production.

The invention discloses a preparation method of a prednisolone sodium phosphate intermediate. The prednisolone sodium phosphate intermediate is prednisolone phosphate as shown in a formula II, prednisolone is used as a raw material and reacts with diphosphoryl chloride, and reaction steps include: A adding a compound I into an organic solvent MTHP under nitrogen protection, stirring and dissolvingthe compound I, slowing dropping the diphosphoryl chloride at the temperature ranging from -50 DEG C to -60 DEG C and performing heat reaction; B adding purified water after reaction to terminate reaction and performing standing layering for 2-4 hours; C adding an organic phase into the purified water, performing extraction twice, adding activated carbon into the organic phase and performing heatinsulation discoloration at the heat insulation temperature of 30-50 DEG C for 1-2 hours; D performing filtration, vacuum concentration, cooling, discharging and vacuum drying to obtain a compound II. The preparation method is economical and environmentally friendly.

In order to obtain a surface treatment device capable of preventing or suppressing the leakage of a projection material and the like from within the device, a first seal part (54) is disposed on the carry-in port (20) side of a cabinet (18), and a second seal part (64) is disposed on the carry-out port (22) side of the cabinet (18). A blowoff port (72) of an air current production unit (70) is disposed downstream from the second seal part (64) in a wire rod transfer direction, and the air current production unit (70) produces an air current directed toward the inside of the cabinet (18). Consequently, even if a projection material and the like remain on a wire rod (12), the projection material and the like are returned to the inside of the cabinet (18) by the air current.

The invention belongs to a preparation method of alpha-formyl-beta-formamido-propionitrile alkali metal salt in the field of chemical synthesis. The preparation method comprises the following steps: (1) adding formic ester into a container, and slowly adding solid alkali metal C1-4 alkyl alcoholate to form a first mixture at a certain temperature, (2) controlling a temperature of the first mixture, dropwise adding beta-aminopropionitrile into the first mixture to form a second mixture, and (3) moving the second mixture into an autoclave, allowing beta-aminopropionitrile and formic ester to generate a formylation reaction to form alpha-formyl-beta-formamido-propionitrile alkali metal salt liquid, and performing filtration to form the alpha-formyl-beta-formamido-propionitrile alkali metal salt. The method is high in yield, low in cost, simple to operate and suitable for industrial massive production, and the produced alpha-formyl-beta-formamido-propionitrile alkali metal salt is high inyield and low in impurity content.

The invention discloses a method for treating heavy metal contaminated soil by using plants and chelating agents. The method comprises the steps of planting the plants having enrichment capacity for heavy metals in the heavy metal contaminated soil with heavy metal contamination type Zn, Pb, Cd and Cu, and putting the chelating agents in the heavy metal contaminated soil. The plants which have enrichment capacity for the heavy metals comprise aspens, peganum harmala or nitraria sibirica palls. The aspens are populus alba var.pyramidalis bunge. The chelating agents are EDTA, EGTA or CA (citric acid). By adopting the method, plant cultivation and soil recycling industry development is pushed, reutilization of nonrenewable resources is benefited, economy, zoology and environmental protection regeneration treatment is carried on the areas after being contaminated by the heavy metals, and whole ecological balance is facilitated.

The invention relates to a preparation method of an ethacridine lactate intermediate. The preparation method comprises the following steps that phosphorus oxychloride and 2-p-ethoxyphenylamino-4-nitrobenzoic acid are mixed according to a mole ratio of 2: 1; the mixture undergoes a reaction at a temperature of 70 to 120 DEG C for 0.5 to 2 hours; reaction products are cooled to a room temperature and are directly added with a polar aprotic solvent and a multi-fatty alcohol catalyst; the mixture is added with a nitrogen source at a low temperature of -10 to 20 DEG C; and the mixture with the nitrogen source is heated to a temperature of 80 to 180 DEG C and undergoes a reaction for 1 to 6 hours to produce 2-ethoxy-6-nitro-9-aminoacridine. The preparation method can be operated simply, is safe, realizes recovery and recycle of a reaction waste liquid thereby avoiding environmental pollution, reduces a raw material cost and improves a reaction yield.

The invention discloses a method for recycling and reusing L-(+)-tartaric acid in production of D-p-methyl sulfone phenyl ethyl serinate. The method comprises the following steps: (1), a L-(+)-calcium tartrate dihydrate crystal is recovered from L-ethyl ester mother liquor; (2), an L-(+)-tartaric acid double brine solution is recovered from D-p-methyl sulfone phenyl ethyl serinate mother liquor; (3), L-(+)-tartaric acid double hydrochlorination is performed; (4), L-(+)-tartaric acid is recovered through L-(+)-tartaric acid single hydrochlorination; and (5), processes of vacuum concentration, crystallization, separation, drying and the like are performed. An insert organic solvent is used for replacing a conventional water phase method to recover L-(+)-tartaric acid, the possibility of side reaction is avoided, the purity and specific rotation of a product can both reach the raw material quality standard, and L-(+)-tartaric acid can be directly and circularly applied to chiral resolution of D-p-methyl sulfone phenyl ethyl serinate. Different recovery processing technologies are adopted for different mother liquor of two components in the production process of D-p-methyl sulfone phenyl ethyl serinate, the product quality is improved remarkably, the whole recovery condition is mild, and the operation is simpler and easy to control.

The invention provides a method of recovering and utilizing salt lake lithium extraction mother liquor and producing a by-product basic magnesium carbonate. The method includes: mixing first lithium carbonate mother liquor and second lithium carbonate mother liquor according to a certain ratio, reacting, filtering, washing, and drying to obtain industrial basic magnesium carbonate hydrate; and removing carbonate ion residue in the mother liquor after reaction with industrial hydrochloric acid having a concentration of 31%, mixing the mother liquor after the carbonate ion removal with brine that is a raw material for producing lithium carbonate according to a ratio, and performing natural crystallization and sodium precipitation for 10-20 days. After the natural crystallization and sodium precipitation, the content of Li+ is 5-6 g/L and the content of Na+ is smaller than 2.5 g/L, thus reaching requirements for using in workshops. By the manner, the lithium carbonate lithium extraction mother liquor is prepared into the raw material brine for production of the lithium carbonate. The method is simple in process and low in cost, and effectively increases the comprehensive utilization rate of the lithium resource.

The invention discloses a fabric shade unfolding assisting mechanism of a full-automatic automobile shade. The fabric shade unfolding assisting mechanism of the full-automatic automobile shade comprises an inner gear ring (2), multiple pinions (4) meshed with the inner gear ring (2), an outer gear ring (5) meshed with all the pinions (4), a top cover (6) movably combined with the outer gear ring (5) in a sleeved mode, and a plurality of brush strips (7) which are arranged on the edge of the top cover (6) in the circumferential direction and are used for smoothening the fabric shade so as to enable the fabric shade to be unfolded or folded smoothly, wherein a first one-way rotating structure is arranged on the outer gear ring (5) and the top cover (6), the outer gear ring (5) drives the top cover (6) to rotate in one direction through the one-way rotating structure when the fabric shade is unfolded, a second one-way rotating structure is arranged on the inner gear ring (2) and the top cover (6), the inner gear ring (2) drives the top cover (6) to rotate in one direction through the second one-way rotating structure when the fabric shade is folded, and the outer gear ring (5) and the inner gear ring (2) drive the top cover (6) to rotate in the same direction. The fabric shade unfolding assisting mechanism of the full-automatic automobile shade can assist in smooth unfolding and folding of the fabric shade, and impurities on the fabric shade can be removed when the fabric shade is folded.