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

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 separation and purification method of dodecanedioic acid includes the following steps: decolouring the fermenting liquor in which the organism is fermented with active carbon, filtering, adding chitosan and ethylene diamine tetraacetic acid into the filtrate, making them combine with impurity being in fermenting liquor to form suspended matter, microfiltering to remove the suspended matter, ultrafiltering and further removing impurity to make purification, then adding acid in the filtrate to make dodecanedioic acid precipitate, filtering and drying so as to obtain the dodecanedioic acid product.

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 discloses a method for comprehensively recycling a vanadium-titanium series denitration spent catalyst. The spent catalyst and sodium carbonate are mixed and subjected to high-temperature roasting, then obtained high-temperature melt is subjected to water quenching, and a glass body is manufactured; the glass body is subjected to fine grinding and then water leaching, and filter liquid and filter slag are obtained after filtering; and the filter liquid is used for extracting vanadium oxide, tungsten oxide and molybdenum oxide, and the filter slag is used for preparing titanium dioxide. By means of the method, valuable elements in the spent catalyst are completely recycled, in addition, the obtained product can be directly returned to be used for preparing of the denitration catalyst, various elements can be recycled at the same time, and especially, the titanium element can be recycled. By means of the method, a titanium dioxide product can be directly obtained finally, the purity of the titanium dioxide product can reach 99.0% or above, the process of sulfuric acid method recycling is omitted, and the method has the beneficial effects that the technology is environment-friendly, the comprehensive recycling cost is low, and the product value is high.

The invention relates to a water accommodating tool, and provides a disposable water bag, which can prevent a water body in a bucket from being influenced by the outside environment, and a processing method for the disposable water bag. The disposable water bag is provided with a bag body, a bag plug and a plug cap, wherein the bag body is provided with an outer layer, a middle layer and an inner layer. The processing method comprises the following steps of: compounding a polyethylene terephthalate (PET) film and a protactinium (PA) film by glue, and solidifying the compound at constant temperature to obtain a PET and PA compound film; compounding the PET and PA compound film and a polyethylene (PE) film by glue, and solidifying to obtain a PET, PA and PE compound film; making a bag by using the compound film by a bag making machine to form the bag body; performing injection molding to make the bag plug, and performing secondary injection molding on the outer wall at the lower end of the bag plug to form a compound layer; thermally adhering the bottleneck of the bag opening of the bag body to the outer wall at the lower end of the bag plug; filling water, sealing compactly, and detecting whether the water bag leaks water by using a pressure machine; performing injection molding on a threaded body and a movable plug of the plug cap, assembling the threaded body and the movable plug to form a whole, and arranging a sealing gasket; and folding the disposable water bag, putting into a packaging box, and matching the plug cap.

The invention discloses a preparation method of a catalyst and belongs to the field of preparation and application of catalysts. The preparation method comprises the following steps of: a) in the presence of inert gas, mixing acetylacetone, cobalt hydroxide, benzene and / or benzene derivative, then distilling moisture until the moisture content of reflux is less than 300ppm, so as to obtain a solution A containing cobalt acetylacetonate, and cooling to the temperature below -10 DEG C for later use; b) in the presence of inert gas, mixing cyclopentadiene, 1,5-cyclooctadiene, benzene and / or benzene derivative, cooling to the temperature below -10 DG C, adding triethyl aluminum, and uniformly mixing, so as to obtain a solution B is obtained; and c) slowly adding the solution B into the solution A at the temperature below 0 DEG C, stirring, heating to 25 DEG C, reacting for 3-5 hours, and filtering, wherein the obtained filtrate is the catalyst benzene and / or benzene derivative solution of 1,5-cyclooctadiene cyclopentadienyl cobalt. The invention also discloses a method for preparing 2,2-dipyridyl by utilizing the catalyst.

The invention discloses a production process for synthesizing tricyclazole by using a solid super acid. The process takes an intermediate 4-methyl-2-hydrazinobenzothiazole as a raw material, formic acid as a ring-closing agent, chlorobenzene as a solvent, and the solid super acid as a catalyst for synthesizing the tricyclazole, wherein the solid super acid is perfluorosulfonic acid resin. The process comprises the following steps: mixing 4-methyl-2-hydrazinobenzothiazole with chlorobenzene, then adding formic acid, conducting heating for refluxing until the 4-methyl-2-hydrazinobenzothiazole iscompletely converted into an oximido intermediate; then adding the solid super acid, conducting refluxing for dehydrating, when the reaction reaches the end point, filtering out the solid super acidwhile the system is hot, then removing the solvent from the mother liquor, adding water for crystallization, conducting cooling, filtering, water washing and drying to obtain the tricyclazole. The production process disclosed by the invention creatively introduces the solid super acid as the catalyst, and uses a slight excess of formic acid to efficiently synthesize the tricyclazole, thereby increasing the utilization rate of formic acid from 10% to 70% or more, and greatly improving the utilization rate of formic acid.

The invention discloses an on-line adjustment method for a switch of a gas insulated switchgear station. The method comprises the following steps of S1, using a multimeter to respectively measure conduction situations of three-phase contacts (A, B and C) in the switch so as to provide display for the on and the off of the switch; S2, inserting a rocker handle into a drive hole in a drive box of the switch, using the rocker handle to switch off the switch by a rocking manner, and manually rocking each linkage rod shaft corresponding to each phase contact outside the switch to a switch-off mechanical limit node; S3, using the rocker handle to switch on the switch by the rocking manner, recording the number of turns of the rocker handle when each linkage rod shaft passes through each node, comparing the recorded number of turns with the preset standard number of turns, if the recorded number of turns meets the requirement of the standard number of turns, finishing the adjustment; if the recorded number of turns does not meet the requirement of the standard number of turns, adjusting according to S4. With the application of the technical scheme, the problems of non-synchronism of the switches with same type, and the matching of electric limit nodes and the mechanical limit nodes are solved.

The invention discloses a method for rapidly determining high dietary fiber rice. The method comprises the following steps: (1) taking polished rice grains and cooking; (2) sequentially removing fat, protein and starch in the cooked rice grains by organic solvent extraction, protease hydrolysis and amylase hydrolysis to obtain residue; (3) by observing the form of the residue with the naked eyes, determining that the residue which can retain the intact grain form is high dietary fiber rice, and the residue which becomes white loose floccules without a grain structure is low dietary fiber rice, wherein the dietary fiber content of the high dietary fiber rice is more than or equal to 5 percent. The cooked polished rice grains are taken as a study object, the fat, the protein and the starch in the rice grains are removed by a relatively mild treatment method, and the content of the dietary fiber in the rice is determined by the appearance form of the rice grains; the method not only is simple and efficient, but also the results are accurate.

The invention relates to a method for preparing a ternary polyacrylonitrile copolymer applicable to a carbon fiber precursor; the method comprises the steps: under the protection of nitrogen gas, mixing acrylonitrile, itaconic acid, dispersant and water and heating to 60-75 DEG C; dropwise adding initiator aqueous solution and acrylamide aqueous solution in sequence; after dropwise adding, timing and reacting for 3-24h, washing, denitrifying, filtering, drying and obtaining the ternary polyacrylonitrile copolymer. A water-phase suspension polymerization process is adopted to polymerization; the polymerization heat is easy to be removed and the polymerization temperature is easily controlled; the average molecular weight of the ternary polyacrylonitrile copolymer is higher and the molecular weight distribution is narrow; the prepared ternary polyacrylonitrile copolymer is capable of effectively improving thermal stability performance at a high-temperature pre-oxidation stage and has certain actual application prospects.

The invention discloses a method for extracting and separating ginkgo leaf polyprenol acetic ester from a ginkgo leaf by supercritical carbon oxide. The first extraction comprises the following steps of: putting dried and pulverized ginkgo leaf powder into an extraction kettle, introducing the supercritical carbon oxide with the pressure of 25-35 MPa into the extraction kettle; controlling the temperature of the extraction kettle to 40-70 DEG C; circularly extracting the ginkgo leaf for 5-10 hours; and releasing an ointment containing the ginkgo leaf polyprenol acetic ester from a separation kettle in two-stage series connection. The second extraction comprises the following steps of: filling the ointment which is obtained in the first extraction into the extraction kettle; introducing the supercritical carbon oxide with the pressure of 5-15MPa into the extraction kettle; controlling the temperature of the extraction kettle to 20-30 DEG C; circularly extracting the ginkgo leaf for 3-8hours; and releasing an oily matter of the ginkgo leaf polyprenol acetic ester from the extraction kettle. The method has low cost and high content without organic solvent extraction, and the extractwith high purity can be used as an important material applied to healthcare food, cosmetics, drugs and the like.

The invention discloses a method for preparing a COFs@HPAN nanofiltration composite membrane. COFs and a meltable PAN-based copolymer are fully blended by a high-speed mixing technology to prepare a uniformly distributed COFs-PAN masterbatch, and then the COFs with a uniform distribution are prepared. COFs-PAN blend membrane, and then through three levels of cross-linking in sequence to obtain COFs@HPAN nanofiltration composite membrane. In this method, by adjusting the process parameters of hydrolysis, irradiation and pre-oxidation reaction, the COFs-PAN blend film is processed by hydrolysis-irradiation-pre-oxidation reaction in sequence, and a multi-level adjustable network cross-linked structure can be constructed. According to the needs of different purposes, the network cross-linking structure of the nanofiltration composite membrane can be adjusted to achieve different pore sizes, so as to achieve the functions of efficient decolorization, desalination and virus removal. The prepared asymmetric structure COFs@HPAN nanofiltration composite membrane has excellent permeability and selectivity, high porosity, uniform pore size distribution, excellent thermodynamic stability, chemical resistance, and cycle stability, and can be applied in harsh water environments Separation and purification.