57results about How to "Product quality indicators are stable" patented technology

The invention discloses a synthetic method of anethole. Anisole and propionyl chloride serve as starting raw materials, are subjected to a friedel-crafts acylation reaction, then are restored through sodium borohydride, and then are catalyzed and dehydrated through organic acid and acid inorganic salt, and finally the anethole is manufactured through rectification. Side reaction is low through the adoption of acylation and reduction, a middle body is not needed to be purified and can be directly put into the next reaction, purification loss and purification cost of the middle body are reduced, yield coefficient is improved, and energy consumption is reduced. A chemical reduction method is utilized to replace a catalytic hydrogenation method, selectivity is high, response speed is fast, side reactions are small in number, and reduction yield coefficient can reach above 98%. Double catalysts are adopted to carry out ordinary pressure low temperature dehydration in dissolvent with a low boiling point, and compared with a negative pressure continuous dehydration method, dehydration time can be shortened by 90%, and the energy consumption is greatly reduced. The total yield coefficient of the method can reach 75%. A product quality index is higher than that of a natural product standard.

The invention belongs to the field of chemical technology and specifically relates to a method for removing residual formic acid in epoxidized fatty acid methyl esters or epoxidized soybean oil by the use of a eutectic solvent. The method provided by the invention comprises the following specific steps: sending crude epoxidized fatty acid methyl esters or crude epoxidized soybean oil which contains 0.2-15wt% of formic acid and is obtained by a epoxidation process through a formic acid method into an extraction kettle, adding a certain amount of an extractant under the condition of stirring, stirring for a period of time, standing for layering, sending a material on the upper layer into a vacuum dehydration kettle for further dehydration and refining, pouring an extract on the lower layer into an extractant regeneration kettle; heating under the condition of pressure reduction to distill formic acid in the extract, recycling the formic acid steam after being condensed in a condenser, and sending residual extractant left in the extractant regeneration kettle into the extraction kettle for recycling. The method provided by the invention has advantages of no discharge of waste water, high formic acid removal rate, simple technological operation, environmental protection, safety and low cost, and is suitable for both small-scale device and large-scale device production.

The invention discloses a method for preparing regenerated high-shrinkage polyester by a waste polyester alcoholysis method. The method comprises the following steps: (1) pretreatment of waste polyester, (2) alcoholysis of the waste polyester, (3) quality regulation and control of ester and addition of isophthalic acid or 1,4-cyclohexanedimethanol comonomer, and (4) polycondensation and preparation of sections. The intrinsic viscosity of the finally obtained regenerated high-shrinkage polyester is 0.60-0.70 dl/g, the melting point is 210-230 DEG C, the content of diethylene glycol is 3.0+/- 0.3%, and a chroma b value is less than 6. The prepared regenerated high-shrinkage polyester can be used for preparation of high-shrinkage polyester filaments, short fibers and high-shrinkage polyesterfilms; and high-valued recycling of the waste polyester is realized.

The invention relates to a preparation method of a macromolecular multi-layered hydrogel drug sustained-release material. The preparation method mainly includes steps of performing laminar superimposition function on the proper mixture ratio and composition of polyanion macromolecular blended solution A and polycation macromolecular blended solution B through a micro-bedding co-extruding device, sealing and placing the solution A and solution B to make them crosslink slowly and completely to realize structuring of macromolecular polyelectrolyte loaded with drugs, and to prepare a macromolecular polyelectrolyte hydrogel drug loading system with flexible and controllable drug form distribution, flexible and controllable drug sustained-release performance and having alternative multilayered structure, so as to meet different drug sustained-release demands. Compared with the traditional method of preparing the macromolecular multi-layered hydrogel drug sustained-release material by superimposition layer by layer, the method is a continuous production method, and good for improving the production efficiency; the technique is simple, and product quality index between different batches is stable; the preparation can realize the large-scale industrial production, is wide in application scale and has wide industrial and market prospect.

The invention relates to a heat-insulating mortar production process and device, mixing the powder and inorganic light aggregate into various barn, materials in both barns feeding to the spiral mixer continuously. The device comprises the feeder, hopper, feeding device, mixer, and packing machine. The two parallel barns have hoppers opposite to each other, feeder at the outlet of one barn, mixer at the outlet of a feeder, the other barn having a feeder mixer, and the packing machine setting at the outlet of the mixer. It realizes continuous production, low in labor, high in production efficiency, fine in product quality.

The invention discloses a method for preparing regenerative cationic-dye dyeable polyester with a waste-polyester alcoholysis method. The method includes the steps of 1), pretreatment of waste polyester; 2), alcoholysis of the waste polyester; 3), quality regulation of esters and adding of isophthalic acid-5-sodium and polyethylene glycol as a comonomer; 4), polycondensation and slicing preparation, wherein the cationic-dye dyeable polyester finally obtained is 0.55-0.65dl/g in intrinsic viscosity, 220-230DEG C in melting point, 5.5+/-0.3% in content of diglycol and smaller than 8 in chroma value of b. The obtained regenerative cationic-dye dyeable polyester is applicable to preparation of cationic-ion dyeable poester filaments and short fiber, and high-value recycling of the waste polyester is realized.

The invention discloses a method for preparing a polymer/inorganic filler composite material. The method for preparing the polymer/inorganic filler composite material is characterized by comprising the following steps: carrying out mixing granulation on polymers and inorganic fillers according to a certain proportion, conveying by an extruder in a bidirectional stretching melt mixing and molding integrated device, plasticizing and melting, thereby obtaining particles or sheets of the polymer/inorganic filler composite material with the inorganic fillers with good dispersibility and excellent performances under the bidirectional stretching-shearing acting force of bidirectional stretching melt mixers. According to the invention, inorganic filers are distributed more uniformly in a polymer matrix, and have few aggregates; moreover, the dispersion morphology and the dispersion degree of the inorganic fillers can be regulated and controlled by changing the number of the bidirectional stretching melt mixers. The polymer composite material obtained by the method provided by the invention has favorable mechanical performance, favorable thermal stability, favorable electric conductivity and favorable flame retardance. The method for preparing the polymer/inorganic filler composite material, which is provided by the invention, can be used for continuous production, is convenient to operate and control, is stable in quality, is high in production efficiency, and has wide application prospect.

The invention discloses a method for preparing a heat-conductive composite material, wherein a crystalline polymer and a heat-conductive filling material are used as the raw materials; the crystalline polymer and the heat-conductive filling material are mixed according to the weight ratio of (50-80):(50-20); in the event of processing, polymer melt flows through a strong-shearing flow field; the dispersed state of the filling material in a polymer matrix is improved; more mutual contact heat-conductive network structures including the heat-conductive filling material, polymer crystal and the heat-conductive filling material are formed, and therefore, the heat-conductive coefficient of the composite material can also be greatly increased. On the basis of the existing traditional extrusion equipment, a bidirectional tensile mixer is additionally arranged; and the method for preparing the heat-conductive composite material prepared by the invention has the advantages of being simple to operate, continuous for production, convenient for operation control, steady in quality and high in production efficiency and has wide industrialization and market prospects.

The invention discloses a preparation method of macromolecular laminar drug-loaded hydrogel with controllable drug distribution. The preparation method mainly includes steps of performing multiple times of laminar superimposition on polyanion macromolecular blended solution A with appropriate proportion and composition and polycation macromolecular blended solution B with appropriate proportion and composition through a microlayer co-extrusion device, and sealing and placing to allow the solution A and the solution B to crosslink slowly and completely to realize structuring of drug-loaded macromolecular polyelectrolyte so as to prepare a macromolecular hydrogel drug loading system with flexible and controllable drug form distribution and drug release performance and with an alternative multilayered structure to meet different drug release demands. Compared with a traditional method using layer-by-layer superposition to prepare the macromolecular laminar drug-loaded hydrogel, the method has the advantages that the method is a continuous production method and beneficial to the improving of production efficiency; the method is simple in process, the product quality indexes of different batches of produces are stable, and the method is capable of achieving large-scale industrial production, wide in application range and promising in industrialization and market prospect.

The invention discloses a method for manufacturing carvacrol by carvone composite foot oil. The method comprises the steps of enabling sodium hydrogen sulfite and carvone of the composite foot oil to be subjected to an additive reaction, generating water-soluble alpha-hydroxy sodium sulfonate, separating insoluble organic impurities, then heating the alpha-hydroxy sodium sulfonate together with alkali, hydrolyzing the alpha-hydroxy sodium sulfonate and the alkali to be the carvone, isomerizing and rectifying the carvone, and obtaining the carvacrol. The alkali is sodium hydroxide. The method for manufacturing the carvacrol by the carvone composite foot oil has the advantages of being temperate in reaction condition, convenient to operate and prone to industrialization. Waste water generated in various steps of the reaction is neutral. A sulfuric acid solution can be repeatedly used. A recovery rate of the carvone of the composite foot oil is more than 80 percent. The manufactured carvacrol is more than 9.5 percent in content and product quality indexes are higher than the perfume grade standard.

The invention discloses a method for preparing a medicament sustained-release composite material. In the method, biodegradable high polymers are taken as a substrate and a dispersed phase, and 50-99 percent by weight of a biodegradable high polymer substrate, 50-1 percent by weight of a biodegradable high polymer dispersed phase, and a medicament of which the amount is 0.01-40 percent based on the total weight of a biodegradable high polymer mixture are fused and mixed by using an extruding machine of a multi-stage bilateral stretching, mixing and pelletizing integrated device, so that structuring of a drug-loading biodegradable high polymer blend is realized, a high polymer drug-loading substrate with flexibly-controllable releasing performance is prepared, and different medicament releasing demands are met. By adopting a continuous production process in the method, the production efficiency is increased, the process is simple, and the quality indexes of different batches of products are stable. The method can be applied to large-scale industrial production, is wide the application range, and has wide industrial and market prospects.

The invention provides a method for improving quality, reducing cost and improving efficiency of ceramic raw materials prepared from granite stone waste rocks. The method comprises the following steps: multi-stage crushing, laminated crushing, coarse grain pre-selection, pre-grading, partial ore grinding, multi-stage magnetic separation, grading separation, superconducting strong magnetic separation, grading dehydration and the like. The method is a pollution-free and environment-friendly physical technology in the whole process; compared with a traditional process, the comprehensive technicaland economic indexes are obviously improved, high-quality glass and ceramic raw materials with the K2O content of 6-10wt%, the Na2O content of 0.5-3.5wt%, the SiO2 content of 65-74wt% and the Fe2O3 content of 0.15wt% and the whiteness of 60-68 are obtained, the whiteness of the product is improved from 50-53 to 60-68 degrees, the yield is improved from 51-55% to 65-72%, and the treatment capacitycan be improved by 13-18%; the product structure is refined and diversified, and a proper product is provided for material homogenization, energy conservation and consumption reduction in the downstream glass and ceramic industry machining process.

The invention discloses a process for refining caprolactam. The process comprises the following steps: performing a hydrogenation reaction on a coarse caprolactam aqueous solution which is obtain after an extraction process; then, adsorbing by ion exchange; and further concentrating and distilling to prepare high-purity caprolactam. The process breaks through the convention of sequentially adsorbing and hydrogenating in the prior art, the extracted caprolactam aqueous solution is refined by adopting a process of sequentially hydrogenating and adsorbing by ion exchange, so that the content of impurities and inorganic salt which exist in coarse caprolactam and influence the product quality can be effectively reduced, and the coarse caprolactam can be purified. According to the process, the use cycle of ion exchange resin is prolonged, the number of regeneration times is reduced, massive wastewater generated by ion exchange resin regeneration is avoided, cost and resources can be reduced on the premise of improving the product quality, and pollution can be reduced.

The invention provides a quantitative test method for components of additives in a PA6 producing process. The quantitative test method comprises the following steps: preparing PA6 additive solution samples with different component contents; collecting spectral data of multiple groups of samples by a Fourier near infrared spectrometer, to obtain a near infrared spectrogram of each sample, and constituting a calibration sample set; correlating the component contents of each group of samples with the spectrogram; establishing a quantitative analysis model for a solution component test; after assessment results meet requirements, testing components of a solution to be tested by the Fourier infrared spectrometer, to obtain component data of the solution to be tested. The quantitative test method has the beneficial effects that: the detection accuracy is up to 0.01%, the blending quality of acid additives can be controlled, the blending error of each batch is controlled within +/-0.2%, the blending accuracy of the additives is increased, and the stabilities of the product quality index, the spinning property and the dyeing uniformity are improved.

The invention provides an embedded data acquisition system and method for GDM networks of SIMATIC TDC systems, and aims at solving the problem that the data acquisition of TDC systems in the prior artmust be realized through GDM network cards. The system comprises automatic control software FB-ACQ, a memory module MEM-ACQ, a single board computer and data acquisition software TACQ. The FB-ACQ isoperated on a TDC system controller, completes data acquisition for the TDC system controller according a period configured for the acquisition and stores the acquired data in a specific area MEM-ACQof a GDM; and the single board computer is inserted into a TDC system rack in an embedded manner, and completes the acquisition of real-time data and historical data through operating the TACQ. The embedded data acquisition system and method are capable of realizing the high-speed acquisition of GDM data of the TDC systems, ensuring the time precision of data acquisition, and ensuring that the cumulative time error of every 10000 sample values does not exceed 1 ms; and the fastest sampling period can reach 1 ms, up to 50 pieces TDC controller data can be acquired at the same time, and up to 2048 channels can be acquired at the same time.

The invention discloses environment-friendly non-woven wallpaper body paper and a method for producing the same. The method includes four steps of (1), selecting raw materials including raw main production materials which are wood pulp boards and chemical fibers; (2), preparing slurry, to be more specific, defibering the wood pulp boards by the aid of hydraulic pulpers, carrying out grinding by the aid of double-disc grinding machines to obtain wood pulp slurry for standby application, washing the chemical fibers by the aid of hot water and dispersing the chemical fibers by the aid of dispersion machines to obtain chemical fiber slurry for standby application; (3), configuring the slurry, to be more specific, uniformly mixing the wood pulp slurry and the chemical fiber slurry, which are prepared at the step (2), according to certain proportions to obtain mixtures and adding adjusting materials and adhesive into the mixtures to obtain slurry; (4), manufacturing body paper with pulp, tobe more specific, diluting the slurry prepared at the step (3) until paper can be manufactured with pulp in an online manner, carrying out dehydration forming by the aid of oblique meshes of oblique-mesh papermaking machines, carrying out dehydration by the aid of squeezing portions, carrying out drying and finishing by the aid of drying portions and carrying out sorting by the aid of paper winding machines to obtain the environment-friendly non-woven wallpaper body paper. Compared with the prior art, the environment-friendly non-woven wallpaper body paper and the method have the advantages ofzero toxicity or harm and environmental friendliness.

The invention discloses a spinning procedure technological parameter optimization method based on carbon accounting, and relates to the field of energy conservation, emission reduction and quality control in the spinning production process. The method comprises the following steps: firstly, selecting process parameter indexes which influence the carbon emission and the resultant yarn quality of a spinning procedure; extracting key quality indexes for evaluating resultant yarn quality according to a variable coefficient method; and constructing a relation model between the energy consumption of the spinning process and the quality of resultant yarn; establishing a target carbon footprint accounting function of the production process according to the spun yarn production flow; determining key indexes influencing the carbon footprint and the extracted evaluation quality according to the target carbon footprint accounting function; and based on preset mathematical software and a grey correlation analysis method of signal-to-noise ratio + entropy weight method, fusing the key indexes of carbon emission and evaluation quality to obtain a target comprehensive index. The purposes of reducing production energy consumption in the spun yarn production process, reducing carbon emission and improving the spun yarn quality are achieved.

The invention discloses a polyester drawn textured yarn process optimization method, and relates to the field of polyester drawn textured yarn production process energy conservation, emission reduction and quality control, and the method comprises the steps: building a target carbon footprint accounting function of a production process according to materials, energy consumption and carbon emissionof each production stage in the polyester drawn textured yarn production process; according to the target carbon footprint accounting function, determining key process parameters influencing the carbon footprint and influencing the quality characteristics of the polyester drawn textured yarn finished product; and optimizing the key process parameters based on preset mathematical software, an orthogonal test of a signal-to-noise ratio and a VIKOR method of'entropy + CRITIC 'comprehensive empowerment to obtain a target key process parameter combination. According to the method, the aims of reducing the production energy consumption in a data driving mode, reducing the carbon emission and improving the quality index of the polyester drawn textured yarn product in the production process of the polyester drawn textured yarn are achieved.

The invention discloses a method for preparing a thermosensitive alternate laminar drug release composite material. The method is mainly characterized by preparing the thermosensitive alternate laminar drug release composite material of which a polymer-based drug loading layer and a polymer-based temperature response layer are alternately and orderly arranged through fusion co-extrusion, regulating morphological structures of the polymer-based drug loading layer and the polymer-based temperature response layer through a shear tensile action under the action of a laminar overlay force field in an extrusion process, improving drug diffusion and temperature response release channels, enabling the obtained thermosensitive alternate laminar drug release composite material to have a reasonable initial drug release amount and a temperature response drug release property, realizing controllable, flexible and effective release of a drug, and meeting different drug release requirements. According to the thermosensitive alternate laminar drug release composite material prepared by the invention, the morphology can be structured, and the property can be designed; the thermosensitive alternate laminar drug release composite material can be biodegraded, is safe and non-toxic, is good in mechanical property, can be continuously produced, is flexible and controllable in drug release behavior, and has remarkable research value and remarkable application prospect in the field of drug response release.

The invention discloses a method for continuously preparing peroxymonosulfuric acid by using a microchannel reactor. The method comprises the following step: with hydrogen peroxide and sulfuric acid as raw materials, simultaneously and continuously conveying the raw materials into the micro-channel reactor, wherein a reaction molar ratio of the hydrogen peroxide to the sulfuric acid is controlled to be 1: (1.1-5), a reaction temperature is controlled to be -15 DEG C to 65 DEG C and reaction retention time is controlled to be 2 seconds to 10 minutes. According to the method, the peroxymonosulfuric acid is prepared by adopting the microchannel reactor, the mass transfer efficiency and the heat transfer efficiency of the microchannel reactor are very high; continuous reaction is adopted, so the time consumption of a working procedure can be effectively shortened, and production efficiency is improved; moreover, reactants can be in full contact, and the yield of the product peroxymonosulfuric acid is improved; and meanwhile, reaction heat can be removed more quickly, the temperature of a reaction system can be regulated and controlled in time, accurate control over the reaction temperature is achieved, the possibility of safety and quality accidents is reduced, and safe and efficient production is achieved.