587 results about "Chemical index" patented technology

The invention relates to the technical field of chemical engineering, and particularly relates to a production method for monoammonium phosphate. A monoammonium phosphate product is prepared by directly subjecting high pure urea phosphate and ammonia to a double decomposition reaction and reacting for 20-60 min with stirring by controlling a reaction temperature at 40-80 DEG C and a pH value at a reaction endpoint being 4.2-4.6, and through the steps of cooling for crystallization; separating by centrifugation and drying. Measurements of physical and chemical indexes of the produced product show that the physical and chemical indexes of the produced monoammonium phosphate product meet an industrial first level standard. Specifically, the total nutrient content of monoammonium phosphate is higher than 73%; the content of total nitrogen is 12.01-12.23%; the content of phosphorus pentoxide is 61.05-61.25%; the content of moisture is 0.35-0.52%; a pH value is 4.2-4.6; the content of water insoluble materials is 0.090-0.096%; and the content of fluoride is 0.15-0.19%.

The invention discloses a non-destructive inspection method for the comprehensive quality of food and a device thereof, wherein image information reflecting characteristics of an inspected object, such as color, texture, size and shape, etc. is acquired by a machine vision system, and spectral information reflecting physical and chemical indexes of the sample such as moisture, sugar, protein, lipid and PH value, etc. is obtained by a spectrographic detection system, and the acquired image information and the spectral information undergo the preprocessing on the data layer and the information integration on the characteristic layer or the decision layer; together with a built food classification grading expert system, the quality of the inspection object is comprehensively graded. The invention comprehensively utilizes the light image information and the spectral information to inspect the appearance and inner quality of food, thereby the invention can make a quick, convenient, non-destructive and objective inspection on the comprehensive quality of food; the method and the device are widely used to classify food materials, monitor the food processing and grade the food, etc., which ensures the quality of food and contributes to the good quality and low price of food.

The invention discloses a new mean production control type threshing and redrying method, which comprises a raw material preparation process, a threshing process, a redrying process and a packaging process. A process for the near infrared online detection of chemical ingredient contents of tobacco leaves is added before the threshing and redrying and after the threshing and redrying respectively, and the online detection of a near infrared spectrometer cooperates with a computer control system before redrying and links with threshing and redrying equipment to form closed-loop control. In the invention, the addition of the near infrared online detection process before leaf redrying realizes the mean management of threshing and redrying line, eliminates the defect of the past threshing and redrying technique that the control indexes of inner quality are short, thus laying a good foundation for threshing and redrying enterprises to improve processing level and satisfying the requirements of cigarette processing enterprises. The addition of the near infrared online detection after redrying ensures that each box of products have labels of chemical ingredient content data, thus providing powerful data reference for tobacco alcoholization and cigarette prescription, and leading all jobs to have relatively accurate chemical index data as basis.

The invention relates to an improvement method for soil of a saline and alkaline land. The improvement method mainly comprises the following treatment steps of: carrying out on-site investigation on a plot to be improved; taking a water sample; carrying out soil sample analysis; carrying out water sample analysis; designing an improving scheme; carrying out an indoor leaching test: fully mixing and stirring a soil bulking agent, a chemical amendment and raw soil, filling a soil column with the mixture and watering the soil column to conduct a leaching experiment, wherein the soil bulking agent is added in an amount of 5-20% by volume of the saline-alkaline soil; the chemical amendment is added in an amount of 0.5kg/m2 to 5kg/m2 based on the volume fo the saline-alkaline soil; uniformly stirring the soil bulking agent, the chemical amendment and the saline and alkaline soil according to the ratio; setting a salt eliminating trench; burying a salt eliminating device; carrying out water irrigation and salt elimination; and testing the physical and chemical indexes of leaching water and soil. The invention provides the improvement method for soil of the saline and alkaline land. On the premise of not replacing soil, by virtue of adding the saline and alkaline soil amendment and after operations of engineering stirring and water irrigation and salt elimination, the saline and alkaline land is thoroughly improved, so that the saline and alkaline land can be used for agricultural production or afforestation of city.

The invention relates to a refractory material, in particular to a silica brick for a coke oven of 5.5 m. The silica brick comprises a raw material and an auxiliary material, wherein the raw material comprises the following components in part by weight: 200-250 parts of silica coarse powder, 330-380 parts of silica medium powder, 80-130 parts of silica fine powder and 80-120 parts of residual silica bricks as clinker powder; the auxiliary material comprises a mineralizing agent, lime milk and paper pulp which respectively occupy 1.2 percent, 8 percent and 1 percent of the total weight of the raw material; and the mineralizing agent is formed by mixing manganese powder of which the content of MnO2 is more than or equal to 25 percent and iron phosphate powder of which the content of FeO is more than or equal to 65 percent according to the proportion of 1:1. The preparation of the silica brick comprises the following steps: adding the silica coarse powder, the silica medium powder, the fine power and the residual silica bricks in a wet mill; adding the mineralizing agent for dry mixing for 4-5 minutes; adding the lime milk and compacting for 10-15 minutes; adding the paper pulp, mixing till pug is uniform, compacting and forming into a blank. The silica brick is improved from the aspects of raw material selection, raw material particle grain fineness, dimension distribution and the like, and the various physical and chemical indexes of the silica brick are superior to the national standard, so that the service life of the coke oven can be remarkably improved.

The invention relates to the technical field of chemical engineering, and particularly relates to a production method for diammonium hydrogen phosphate. A diammonium hydrogen phosphate product is prepared by subjecting a high pure urea phosphate solution and ammonia to a double decomposition reaction, reacting for 20-60 min under stirring and at a temperature of 50-80 DEG C by controlling a pH value at 7.8-8.2. Physical and chemical indexes of the diammonium hydrogen phosphate product are as follows: the total nutrient content of diammonium hydrogen phosphate is higher than 74%; the content of total nitrogen is 21.02-21.20%; the content of phosphorus pentoxide is 53.0-53.52%; moisture content is 0.25-0.32%; the content of water insoluble substances is 0.087-0.096%; and the content of fluoride is 0.1-0.14%. The diammonium hydrogen phosphate product fully meets an industrial first level product standard.

The invention relates to a method for extracting ethyl ester enriched fish oil from a fish oil refining byproduct, which comprises the following steps: by taking soapstock and solid lipid of the fish oil refining byproduct as raw materials, recovering the soapstock through an acid-based ethyl ester catalysis process, recovering the solid lipid through an alkali-based ethyl ester catalysis process, performing a secondary three-stage molecular distillation and primary urea inclusion combined process, and enriching to obtain the ethyl ester fish oil having high EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid) content. According to the invention, the process is simple and low in cost, solves the byproduct recovery problem during fish oil refining, avoids environmental pollution, changes the wastes into valuable substances, and greatly increases the value of the product; and the physical and chemical indices of the extracted ethyl ester fish oil product conform to the standard, the fish oil has no rancid flavor, the total content of EPA and DHA is respectively increased to 78.42% and 76.15%, and the fish oil achieves better economic benefits.

The invention discloses a manufacturing method of double-faced waterproofing pile-face dual-purpose leather of indumentum and leather boards; the method comprises three parts that: manufacturing process of the pile-face dual-purpose crust leather and waterproofing treatment of the leather boards, the process of dyeing, retanning and stuffing, and indumentum waterproofing process. The physical andchemical indexes, specialty chemical index, waterproofing index, anti-washing index and dry cleaning resistant index of the manufactured double-faced waterproofing pile-face dual-purpose leather of indumentum and leather boards are all in accordance with international or industrial standards.

The invention discloses book reservation dry red grape wine and a brewing method thereof. 'Xiangniang No.1' brier grape is utilized as a raw material for the grape wine, and the physical and chemical indexes of which are as follows: total SO2 is 47mg/L, volatile acid is 0.4g/L, the content of resveratrol is 1.65mg/L and total phenol is 2098/L; and sensory indexes are as follows: the color is purplish red, and the grape wine has varietal fruity aroma and protruding aroma, is pleasant, has no exotic aroma, is mellow and harmonic, and has strong structural feeling and special style. The brewing method comprises the following steps: preparing materials, removing peduncles, smashing, filling into a tank; carrying out open type circulating, dipping, fermenting, separating out from the tank; fermenting malic acid-lactic acid; changing the tank for the first time; blending in balance; and clarifying or fining, stabilizing, ageing, carrying out stability test, filling, bottling and packaging to obtain the finish product. The brewing process of the grape wine is advanced, the raw materials are natural, and no pigment and preservative are added; the wine color is royal purple, and the wine is clear and transparent; the wine has strong fruit and strong typicalness, pleasant and pure aroma and mature fruit; numerous wine columns remain in a cup; and the smooth mouthfeel does not disperse after the wine is drunk.

A hard multi-layer composite PVC floor belongs to the technical field of floors. The hard multi-layer composite PVC floor is prepared from the following steps of stick-pressing, specifically, stacking a wear resistance layer, a color film layer, a medium material layer, a substrate layer and a base material layer in a tray sequentially, and compositing to produce a product by conducting one-time stick-pressing through a hot press and a cold press; and UV tempering, specifically, conducting coating on the product processed in the first step through a coater and placing the product in the firing line to conduct tempering in order to remove internal stress. The hard multi-layer composite PVC floor is simple in technology, and the attachment is completed relying on heat, the hard multi-layer composite PVC floor contains no harmful substances, such as glue, heavy metal, phthalate, and formaldehyde, the floor shrinkage rate and the warping rate are all less than or equal to 0.1%, so that the hard multi-layer composite PVC floor is applied to broader geographical area ranges, physical indexes of the floor is stable and reliable, and the chemical indexes of the floor meet the international and national standards.

The sweet white grape wine brewed with Guirenxiang grape has the physical and chemical indexes of: alcohol content 16 +/- 1.0 vol%, total sugar 170-190g/L, total acidity 7.0-9.0g/L, free SO2 30-50 mg/L, total SO2 less than 200 mg/L and volatile acid less than 1.5 g/L. It is brewed with Guirenxiang grape juice as material, and through squeezing, clarifying, freezing, concentrating, fermenting, blending, ageing, sterilizing, filtering and packing. The sweet white grape is sweet and sour, spicy, and with rich nutrients and health functions.

The invention discloses a method for determining taste quality of rice by using physical and chemical property indexes of rice quality. The method comprises the following steps: respectively obtaining measured values of five physical and chemical indexes of rice to be determined: amylose, gel consistence, alkali spreading value, protein and grain shape; carrying out conversionof characteristic vectors forthe measured values of thefive physical and chemical indexes of rice; obtaining angles ofthefive physical and chemical indexes of rice; carrying out characteristic vector analyses of each index by means of radar map; carrying out a comprehensive evaluation analysis by means of radar map; carrying out a conversion of thecomprehensive evaluation result, and obtaining a rice taste value. The method provided by the invention can be used for rapidly determining taste quality of rice.

The invention discloses a method for rapidly measuring physical and chemical quality indexes of in-use lubricating oil, which comprises the following steps: in a first step, collecting representative samples as a training set; in a second step, measuring an infrared spectrum decay index of the in-use lubricating oil; in a third step, measuring in-use oil physical and chemical quality indexes; in a fourth step, adopting a gradual linear regression method to carry out optimization on the infrared spectrum decay index and establishing a multiple linear regression equation of the physical and chemical indexes and the infrared spectrum decay index; and in a fifth step, for an in-use oil sample, firstly measuring the infrared spectrum decay index and then utilizing the regression equation established in the fourth step to calculate the physical and chemical quality indexes. The method of the invention can rapidly measure seven physical and chemical quality indexes of the in-use lubricating oil, i.e. a kinematic viscosity at the temperature of 40 DEG C, a kinematic viscosity at the temperature of 100 DEG C, water content, a total acid number (TAN), a total base number (TBN), a flash point and a pour point, monitor the quality decay of the lubricating oil, guide to change the oil and guarantee the normal operation of the engine.

The invention provides a method for culturing cordyceps militaris sporocarp with high-content bioactive substances, comprising the following steps: inoculating good cordyceps militaris strains after multiple repeated filtering on a culture medium with the best optimized proportion of carbon to nitrogen sources; and optimizing and culturing at different temperatures, humidity and illumination intensities at different growth periods. Through the cordyceps militaris sporocarp planted and obtained by the method provided by the invention, the contents of bioactive substances are greatly improved, and the bioactive substances mainly comprise the chemical index components of adenosine, cordycepin, cordyceps polysaccharide, cordycepic acid, SOD (Super Oxide Dlsmutase) and the like; for the cordyceps militaris sporocarp planted and obtained by the method provided by the invention, the pharmacology and drug effect are extremely similar to natural Chinese caterpillar fungus, and the contents of bioactive substances of adenosine, cordycepin, cordyceps polysaccharide and cordycepic acid are over that of the natural Chinese caterpillar fungus.

The invention relates to a knitted fabric printing and dyeing process with a special effect. A conventional CVC knitted fabric has the hazy three-dimensional printing effect by organically combining various processes together, such as active printing, dispersive printing, three-cedar sheet two-phase color fixation, and the like. The process is concretely divided into six steps of preprocessing blank fabric, burning-out printing, disperse/reactive printing in one paste, steaming, washing by water and molding, and the process is simple and is easy to operate; favorable physical and chemical indexes and color light reproducing performance are obtained through the two-phase color fixation process, thereby lower-end CVC burnt-out fabric becomes special style fabric with a high additional value. Accordingly, the invention has the characteristics of simple operation, high dye fixing rate, less pollution to environment, hazy three-dimensional special effect and favorable color light reproducing performance. The printing and dyeing process can be also used for a T/R product and a T/C product extended from the traditional CVC knitted fabric.

The invention puts forward a steel-making dephosphorization agent and a preparation method thereof. Raw materials of the dephosphorization agent mainly comprise industrial waste rich in calcium oxide and iron oxide. The preparation method thereof comprises preparing the raw materials, crushing, mixing, stirring, smelting at a high temperature of 1500 to 1550 DEG C, cooling crystallization after melting and tapping, breaking to mold, and obtaining the calcium ferrite dephosphorization agent rich in CaO and Fe2O3 and having a particle size of 5 to 40 mm, wherein the prepared steel-making dephosphorization agent has a main phase of 2Cao.Fe2O3, a melting point of not more than 1280 DEG C, the melting point having a small fluctuation range, stable components, and a variety of equivalent physical and chemical indexes to steel-making dephosphorization agents prepared from high-purity materials. According to the invention, the method is low in production cost, and the product is stable in quality, pollution-free and easy to store. The method is beneficial to popularization and development of a dephosphorization technology.

A method for evaluating ecological restoration of a city watercourse is characterized by comprising the following steps that (A) a city watercourse ecological restoration evaluating system is established to be of a three-level evaluation system structure, the ecological restoration evaluating system serves as a large system, a second-level index serves as a rule layer is divided into three sub-systems of watercourse water quality condition, ecological system health and ecological landscape suitable degree, and third-level indexes represent a plurality of specific indexes and can directly reflect the total situation of each sub-system; (B) an evaluation step is executed: (B1) the watercourse to be evaluated is determined, and a sampling station is designed according to the length of the watercourse; (B2) sample acquisition and analysis are performed including (B21) physical and chemical indexes of water quality, (B22) ecological index (B23) ecological landscape suitable degree index; (B3) evaluation results are analyzed; (B4) the ecological health situation of the watercourse is judged. The method has the important significance on scientific evaluation on the ecological treatment effect of the watercourse and consolidation of ecological treatment results of the watercourse and is suitable for application in evaluation on the ecological restoration of the city watercourse.

The invention relates to the technical field of tobacco processes, in particular to a method for representing filling values of cut tobaccos by the aid of operating parameters of cigarette making machines. The method for representing the filling values of the cut tobaccos by the aid of the operating parameters of the cigarette making machines has the advantages that linear regression relations between simulation filling values and standard filling values can be obtained according to cut tobacco suction forming portion mechanical location and cut tobacco suction zone location parameters of the cigarette making machines and can be used in cigarette production procedures, accordingly, the filling values of the cut tobaccos can be calculated in real time, whether abnormal problems of incoming materials occur or not can be timely confirmed when the filling values exceed a certain interval range, and potential hazards can be eliminated at beginning phases; the weights can be adjusted, accordingly, the consistency of physical indexes of cigarettes can be kept and guaranteed, variation of cut tobacco structures of the cigarettes and the physical indexes of the cigarettes can be controlled in a linkage manner, and the stability of chemical indexes and the inherent sensory quality of mainstream smoke can be guaranteed.

The invention discloses an on-line monitoring device for preparing tobacco essence perfume. According to the on-line monitoring device, one or more process monitoring points are provided with sampling pipelines respectively; near infrared optical fiber probes are arranged behind the sampling pipelines respectively; a plurality of near infrared optical fiber probes at different process monitoring points share and are connected with a near infrared spectrometer; and the near infrared spectrometer is connected with a perfume kitchen master control system through a data line. The near infrared spectrum technology is applied to on-line real-time monitoring of the tobacco essence perfume preparation process. After establishing the on-line monitoring device and a model, a quantitative chemical index and a mahalanobis distance of a sample can be obtained in real time by scanning a spectrum of the sample on line and are compared with control requirements; and if abnormity occurs, the master control system alarms to prompt the technical personnel to search the reason.

The invention relates to a river section degradation evaluation method, which effectively solves the problems that the evaluation excessively depends on data, the compatibility is complicated and the accuracy and efficiency of the evaluation are affected. The method comprises the following steps: establishing river section degradation evaluation elements and indexes, performing in-situ monitoring, carrying out water quality chemical index analysis and biological authentication for a collected sample, determining a weight of criterion layer evaluation elements for the river degradation by utilizing the level analysis characteristic value method, determining a sub-weight for each representative evaluation index of the criterion layer evaluation elements by utilizing a variance method, and obtaining an absolute weight of each index by considering the weight of the criterion layer evaluation elements; evaluating the river section degradation situation according to each evaluation index absolute weight and a matter-element model, calculating a correlation function and correlation degree, and obtaining the degradation degree of the river section according to the evaluation standard. The method is novel and unique, easy to operate and use, good in effect and capable of accurately evaluating the river section degradation and instructing the river governing and ecological restoration.

The invention discloses a water body plankton intelligent monitoring platform integrating Internet of Things, comprising a water taking unit, a remote control and detection unit, an image collection unit, a water quality and hydrology detection unit and a remote monitoring and data processing unit. The monitoring method comprises the following steps: 1. collection of water sample in the field; 2.system debugging and cleaning of a detection passage; 3. sample detection and image collection and uploading; 4. image processing in a remote server; and 5. remote detection of water quality and waterpower data and data transmission. According to the intelligent monitoring platform, a microscope is combined with high speed image collection, Internet of Things and plankton image identification software to construct a set of complete water body plankton intelligent monitoring system. The method breaks through the defects that aquatic organisms monitoring is indirectly realized by only monitoring water quality physical and chemical indexes such as chlorophyll and pH in the water body through the current Internet of Things based water ecological monitoring and the constructed water bloom early warning system is relatively rough.