31results about How to "Save the recycling process" patented technology

The invention discloses a synthetic method for gel-based water-retained slow-release urea fertilizer, mainly comprising the following steps: 1) acrylic monomer is neutralized with 20% potassium hydroxide solution, obtaining a mixed monomer solution with twenty-five percent neutralization degree; 2) the mixed monomer solution is gauged and added into an aqueous urea, forming a polymerization mixed liquid; 3) a cross-bonding agent is added on the condition of heat-preservation stirring, and then a radical initiator is added after agitating the awaiting cross-bonding agent to dissolve; 4) a water gel is generated when the of polymerization is generated on the condition of heat-preservation stirring; 5) the gel-based water-retained slow-release urea fertilizer is crushed, dried, grinded, screened and packed. The synthetic method for gel-based water-retained slow-release urea fertilizer has the advantages of no-use of organic solvent, no solvent recovery problem, simple craft and lower cost.

The invention relates to a method for producing aqueous polyurethane synthetic leather for costume by using a physically-foamed pore forming coating technology. According to the present invention, a physically-foamed polyurethane coating dry film transferring process replaces the original solvent-based polyurethane wet coagulation coating process, such that the problems of pollution and residue of the DMF solvent are solved; with adopting the aqueous polyurethane dry film transferring process to replace the solvent-based polyurethane dry film transferring process, the solvent pollution problem during the production process is eliminated; the synthetic leather for the costume is washed in hot water, the pore forming agent is lixiviated by the hot water, such that the penetrating pores are formed in the aqueous polyurethane coating of the synthetic leather, the water vapor permeability and the air permeability of the synthetic leather for the costume are improved, and the synthetic leather with the good-sanitary property is obtained; with the method, the DMF solvent recovery apparatus and the DMF solvent recovery process are saved, the production cost is reduced, and the technical process is simplified; when the conventional physical properties and the conventional mechanical properties are met, the water vapor permeability of the synthetic leather for the costume is more than or equal to 1.6 mg/cm<2>.h, and the air permeability of the synthetic leather for the costume is more than or equal to 2500 ml/cm<2>.h.

The invention relates to a processing technology of a spinning belt pulley with inner and outer lug bosses, which belongs to the field of manufacturing belt pulleys. The processing technology comprises the following steps of: stamping and performing a blank, reprocessing the performed blank and spinning the reprocessed and performed blank, wherein the reprocessing step of the performed blank comprises the following steps of: cold extruding a formed blank A into a performed blank B with a predetermined size; and rolling and forming the performed blank B by a spinning mode to form the performed blank C with inner and outer lug bosses. Compared with the traditional processing technology, the processing technology of the spinning belt pulley with the inner and outer lug bosses has wide source of raw materials, low cost, high production efficiency and low rejection rate, the spinning mode is used for replacing a stamping mode to produce the blank with the inner and outer lug bosses, products are not easy to deform, the dimensions of the product can achieve higher required precision, and an adopted spinning machine has small erosion, low power consumption and convenient maintenance.

The invention provides a production method for waterborne polyurethane synthetic leather wet process impregnated bass, comprising the following steps of: preparing impregnation liquid by using waterborne polyurethane, filler and water; preparing solidification liquid by mixing a demulsification cross-linking agent with water; saturating a non-woven fabric by the impregnation liquid through an impregnation groove, and extruding some impregnation liquid in the non-woven fabric by a pair of rollers; enabling the non-woven fabric with the impregnation liquid to pass through a solidification groove filled with a coagulating agent to form porous filler by the waterborne polyurethane coagulated by the coagulating agent and the filler, and filling the filler in the non-woven fabric; and washing by water, extruding water and drying to obtain the waterborne polyurethane synthetic leather wet process impregnated bass. The product produced by the invention has the extremely similar microcellular structure, and is better in physical and mechanical properties, water vapor penetration performance, and hand feel characteristic. According to the production method, the solvent pollution problem of DMF (dimethyl formamide) and the product safety problem caused by the residue of the DMF in the production of solvent type polyurethane wet process impregnated bass can be solved.

The invention discloses a method for preparing N-ethyl-N-hydroxyethylaniline. The method comprises the following steps: by taking N-ethylaniline and ethylene oxide as raw materials, in the absence ofa solvent, under catalysis of taurine, performing programmed heating, directly synthesizing N-ethyl-N-hydroxyethylaniline, cooling, and discharging, thereby obtaining a finished product. The method iseasy in raw material obtaining, good in atom economy, gentle in reaction condition, green and environment-friendly, simple and efficient and applicable to industrial production.

The invention discloses a high-crush-resisting rapid degradation magnesium alloy and a preparation method thereof. The alloy is prepared from, by mass percent, 5.0-10wt% of Zn, 1.20-6.0wt% of Cu, 1.50-3.0wt% of Ni, 1.50-5.0wt% of Nd, 0.5-1.5wt% of Ca and the balance Mg and the other impurity elements. According to the high-crush-resisting rapid degradation magnesium alloy and the preparation method thereof, Cu, Nd, Ca and other alloy elements are added to improve the crush resistance of a material, and the degradation rate is increased through Cu and Ni. According to the prepared high-crush-resisting rapid degradation magnesium alloy, the corrosion rate in a 3% KC1 solution at the temperature of 25 DEG C can reach 7.4 mg cm<-2>h<-1>, and the corrosion rate in the 3% KC1 solution at the temperature of 93 DEG C can reach 88 mg cm<-2>h<-1>; and high crush resisting strength is achieved, and the high-crush-resisting rapid degradation magnesium alloy and the preparation method thereof are suitable for the field of shale gas extraction with a rapid corrosion requirement.

The invention provides a production method of protein synthetic leather based on salt coagulation and solidification. The production method comprises the following steps that (1) an impregnating liquid is prepared, 60-85 parts of water soluble protein and 15-40 parts of anionic stuffing agent by mass are added into a stirring kettle for uniform mixing; (2) a coagulating liquid is prepared, 20-30 parts of coagulation agent, 1-3 parts of cross-linking agent, 3-8 parts of formic acid and 50-66 parts of water by mass are added into the stirring kettle for stirring and mixing; (3) a protein/nonwoven cloth complex is prepared; nonwoven cloth passes through an impregnating groove containing the impregnating liquid; the nonwoven cloth with the impregnating liquid passes through a coagulating groove with the coagulating liquid; and the post-treatment is conducted. According to the production method, a solvent DMF (dimethyl formamide) is not required in the whole production process; a production working environment is safe; the environmental pollution is not caused; and the produced protein synthetic leather has good physical and mechanical properties, breathability, moisture permeability, moisture absorption and removal properties and dyeing property.

The preparation process of 2-thiothiazoliidone includes the steps of: forming saturated ammonia-alcohol solution, reaction of ammonia and carbon bisulfide to produce ammonium dithiocarbamate, further reaction with chloracetate to obtain clear condensate liquid, mixing with acid solution through stirring to react to produce crystal, separating and purifying to obtain product. The present invention uses ammonia-alcohol solution, rather than ether, as the solvent and pure water, rather than methanol, for purifying coarse product, and has lowered production cost, improved work environment, environment friendship and other advantages.

The invention relates to the technical filed of preparation of organic intermediates, and in particular relates to a method for preparing 2, 6-bis-(picrylamino) pyridine. The method comprises the following steps: with picrylamino and 2, 6-diaminopyridine as raw materials, water as a medium, and NaHCO3 as a reaction promoter, reacting for 2 to 6 hours at the temperature of 83 to 90 DEG C in the presence of a phase transfer catalyst; and filtering, washing by hot water and recrystallizing by methanol to obtain the 2, 6-bis-(picrylamino) pyridine. According to the method, single water is used as the reaction medium to replace an organic solvent adopted by an existing technology, and the phase transfer catalyst is adopted to reduce interfacial tension and improve activity of the reaction; the picrylamino and the 2, 6-diaminopyridine are reacted under the condition being close to a theoretical material ratio so as to reduce consumption and cost of raw materials; the solvent recovery and separation process is simplified, and the pollution to the environment is reduced.

The invention discloses environment-friendly water-based synthetic leather which sequentially comprises a surface layer, a middle layer and a base layer from outside to inside, the surface layer is obtained by coating water-based slag surface layer slurry; the middle layer is a one-layer bonding layer or two-layer foaming layers or a one-layer foaming layer and a one-layer bonding layer; the foaming layer is obtained by coating a water-based slag foaming layer; the bonding layer is obtained by coating water-based slag bonding layer slurry; the water-based residue is prepared by grinding coffee residues, dry flower residues and other domestic waste residues through low-temperature liquid nitrogen, adding water-based polyurethane resin and then carrying out high-speed shearing dispersion. One of the purposes of the invention is to provide the environment-friendly water-based synthetic leather which can effectively and repeatedly utilize waste residues in life and has no potential chemical hazard to a user, and the other purpose of the invention is to provide the production process of the environment-friendly water-based synthetic leather.

The invention discloses a material cutting system for empty capsule production, which comprises a rack, a sorting device and a cutting device, the sorting device comprises an index plate capable of gradually and circumferentially rotating, a material turning mechanism and a material ejecting mechanism, and a plurality of groups of material placing holes for placing capsule shells are circumferentially distributed in the index plate; the material ejecting mechanism comprises a first ejector pin set and a second ejector pin set which can synchronously and horizontally rotate by 180 degrees, the cutting device comprises a transferring disc capable of rotating by 180 degrees and a cutting knife capable of rotating in the circumferential direction, the first ejector pin set is used for ejecting inverted capsule shells in the material containing holes to fall to the material overturning mechanism, and the material overturning mechanism is used for overturning the inverted capsule shells to be upright. The second ejector pin group is used for ejecting and conveying the capsule shells which are positively arranged in the material placing hole and the positively arranged capsule shells in the material turning mechanism to fall to the transfer disc; and the transfer disc is used for conveying the capsule shells to a cutting position so as to be cut by the cutting knife. The capsule cutting device is beneficial to improving the cutting yield, simplifying the cutting procedure and greatly improving the capsule production efficiency.