30 results about "Acid value" patented technology

In the using process, an operator lifts up the placing cylinder and slowly places the placing cylinder containing a vessel into the acid cylinder, when the fixed handle abuts against the upper edge of the acid cylinder, the stretching cylinder just enters acid liquor, and the acid liquor flows into the placing cavity through the through hole and makes full contact with the vessel, so that the acid value of the vessel can be observed. And after the treatment is finished, an operator can lift out the whole placing cylinder, so that the placing cylinder is prevented from being in direct contact with acid liquor. The hand of an experimenter does not need to stretch into the acid cylinder, acid liquid is prevented from making direct contact with gloves, the burning risk caused by corrosion and damage of the gloves is reduced, the fixed handle is in limiting fit with the upper edge of the acid cylinder, the placing cylinder can be prevented from sliding down or completely sinking into the acid liquid, and the controllability and safety of operation are improved. The placing cylinder realizes sufficient circulation of acid liquor through the through hole, so that the acid liquor can enter the placing cavity from multiple directions to form all-directional soaking with the vessel, and the uniformity and effectiveness of cleaning treatment are improved.

The present application relates to the field of purification of chemicals, in particular to a PGMEA purification method and PGMEA product, and discloses a PGMEA purification method and PGMEA product. Crude PGMEA is purified, and the purification method comprises sequentially performing heavy component removal, light component removal and heavy component removal again. The content of beta-PGMEA in the PGMEA product is less than or equal to 20 ppm. The purification method has the characteristics of high purity of the PGMEA product, low acid value and low content of beta-PGMEA, and meets the demand of high-end products.

The invention discloses a method for rapidly detecting the rolling oil acid value in emulsified liquid for cold rolling production, which comprises the following steps: S1, taking the cold rolling emulsified liquid to be detected, filtering, and then sequentially carrying out organic solvent mixing and extraction, high-speed centrifugal separation and negative pressure rotary evaporation operation on the cold rolling emulsified liquid to be detected, so as to obtain a rolling oil sample to be detected; s2, preparing rolling oil standard samples with different acid values; and S3, respectively detecting the rolling oil standard samples with different acid values and the rolling oil sample to be detected by utilizing an infrared spectroscopy method to obtain infrared spectrums of the corresponding samples so as to obtain a standard curve of the acid value of the rolling oil, and comparing to obtain the acid value of the rolling oil in the cold rolling emulsion to be detected. According to the method, the acid value of the rolling oil in the on-site emulsion can be quickly read and obtained, the result accuracy is high, the requirements for quick measurement and quick adjustment of on-site production of a modern cold rolling unit can be met, and high practicability is achieved.

To provide a technique of measuring the acid number of edible oil at low cost without depending on the subjective view of an observer.SOLUTION: An acid number measuring device 4 for measuring the acid number of a fat includes: an oil type setting unit 402 for setting the oil type of a measurement fat to measure; an image acquisition unit 401 for acquiring an image taken of the measurement fat; and a calculation unit 405 for calculating the acid number of the measurement fat on the basis of the value of at least one primary color of the colors of the measurement fat in the image and the coefficient and the constant related to the set oil type.SELECTED DRAWING: Figure 4

The invention belongs to the technical field of modified polyacrylate resin preparation, and particularly relates to modified polyacrylate resin as well as a preparation method and application thereof.The modified polyacrylate resin is prepared by controlling the mass content of iron element in polyacrylate to be lower than 0.2 ppm, the mass content of dimethylamine in methylamine to be lower than 20 ppm and the acid value of an intermediate product subjected to imidization reaction to be lower than 25 mgKOH / g. The yellowness value of the modified polyacrylate resin is greatly reduced, and the light transmittance of the modified polyacrylate resin is improved.

The application provides a full-automatic acid value tester, and relates to the technical field of acid value testers.The full-automatic acid value tester comprises a detection box, a box door is rotationally installed at the bottom of the front face of the detection box, a placing table is fixed in the detection box, a rotating disc is rotationally installed on the placing table, four detection cups are placed on the rotating disc through placing grooves, a soaking box is fixed at the tail end of the placing table, a detection assembly is arranged between the soaking box and the rotating disc, the detection assembly comprises a circular plate, the circular plate is rotationally installed on the placing table through a shaft, compared with the prior art, four groups of detection assemblies and four groups of detection cups rotate synchronously and are used alternately, the used detection assembly enters the position of the soaking box, is connected with a water-free ethanol storage box at the upper end, and is soaked and cleaned to clean residual detection liquid, and the used detection assembly can be continuously used without being taken out, so that the use efficiency of the equipment is improved, and the entry of dust caused by frequent opening of the box door is avoided.

A refrigerator oil composition may effectively suppress an increase in an acid value even when a ratio of an unsaturated fluorinated hydrocarbon compound (HFO) in a refrigerant is increased. Such a refrigerator oil composition can used for a refrigerant and may include one or more unsaturated fluorinated hydrocarbon compounds of formula (1):CxFyH  (1),wherein x is an integer of 2 to 6, y is an integer of 1 to 11, and z is an integer of 1 to 11, and one or more carbon-carbon unsaturated bonds are present in the molecule. The refrigerator oil composition may include a base oil (A), and one or more silicone compounds (B) selected from the group consisting of an unmodified silicone (B1) and a modified silicone (B2), wherein a content of the silicone compound (B) is 0.05% by mass or more based on the total amount of the refrigerator oil composition.

This invention provides a permeability-enhancing agent with excellent antifoaming properties and a treatment agent for nonwoven fabric manufacturing. The permeability-enhancing agent comprises compounds (A) and (B), and includes at least one selected from compounds (C), (D), and inorganic phosphate (IN). The acid value of the non-volatile component of the above-mentioned permeability-enhancing agent is 0.5~450 mgKOH / g, and the ratio of the peak areas [P1 / (P1+P2+P3)] obtained by determining the non-volatile component of the above-mentioned permeability-enhancing agent using nuclear NMR is 40%~100%. The nonwoven fabric manufacturing treatment agent comprises compound (A) and compound (B), and contains at least one selected from compound (C), compound (D), and inorganic phosphate (IN). The non-volatile component of the nonwoven fabric manufacturing treatment agent has an acid value of 0.5 to 450 mg KOH / g, and the ratio of the peak areas [P1 / (P1+P2+P3)] obtained by determining the non-volatile component of the permeability imparting agent by P-nuclear NMR is 40% to 100%.

1. The name of the design product: oil automatic analyzer. 2. The use of the design product: the design product is used for detecting the peroxide value and acid value of oil. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: front view.

This invention provides a vortex stirring extractor for acid value detection of oil and fat products, belonging to the technical field of stirring devices. It includes a stirring cup, a first stirrer, and a second stirrer. The stirring cup includes a cup body and a lid, the lid sealing the opening of the cup body. The first stirrer is rotatably mounted on the lid and includes a first rotating shaft and multiple stirring elements arranged radially around the first rotating shaft. The second stirrer is rotatably mounted on the base of the cup body, located below the first stirrer. The second stirrer includes a second rotating shaft and multiple stirring blades arranged radially around the second rotating shaft. This vortex stirring extractor for acid value detection of oil and fat products utilizes the rotation of the stirring blades and stirring elements to agitate the sample within the cup, accelerating the sample mixing efficiency and ensuring uniform mixing.

The application provides a method for determining the acid value of propolis soft capsules, and relates to the field of determination of the acid value of oils and fats. Specifically, the method comprises the following steps: 1) extraction: the content of the propolis soft capsules is extracted with an extraction solvent, and then separated to obtain an oil-containing extraction liquid 1; 2) washing: the extraction liquid 1 is added into a mixture of anhydrous sodium sulfate and a washing liquid, extracted, and then allowed to stand to separate into layers, and the lower layer of the washing liquid is discarded, and the extraction liquid 2 is obtained by washing 1-5 times in the same manner; 3) oil preparation: the extraction liquid 2 is dehydrated and filtered, and then the solvent is removed by rotary evaporation under reduced pressure to obtain the oil; and 4) the acid value in the oil is determined by using a potentiometric titration method. According to the method, flavonoids and phenolic acids in the oil of the propolis soft capsules are effectively separated, the interference of the flavonoids and the phenolic acids on the determination of the acid value is reduced, and then the acid value in the oil is accurately characterized.

The utility model relates to an automatic detector belongs to the technical field of detection instrument, including instrument shell, reagent filling mechanism, the reagent bottle carousel for detecting sample, illumination light source and sensor, a plurality of reagent bottle hole positions are arranged on the carousel, and the side surface of reagent bottle hole position is opened to make light pass through, and reagent filling mechanism adds reagent in reagent bottle as needed to reagent bottle, judge titration end point through the sensor receiving the strong weak change light of reagent reflection, and measure the peroxide value or acid value of edible oil through the change of real -time detection indicator. The utility model utilizes the reflection principle of light, and real -time monitoring to the solution color change, can judge the titration end point of peroxide value or acid value of sample accurately. Since staff manual operation is not needed, the titration process is more accurate, automation operation, and staff does not need to endure the foul smell of reagent, reduces the harm of chemical reagent of experimental personnel.

The application discloses a health evaluation and life prediction method and system based on liquid characteristic parameters, wherein the method comprises the following steps: acquiring original parameter data output by a liquid characteristic sensor, wherein the original parameter data at least comprises temperature, dynamic viscosity, density, dielectric constant and resistance; screening the original parameter data according to a temperature threshold to obtain screening data; performing temperature regression calculation according to the screening data to obtain regression dielectric constant, regression conductivity and regression kinematic viscosity; calculating water content, acid value and pollution grade according to the regression dielectric constant and the regression conductivity; performing weighted calculation according to the regression kinematic viscosity, the acid value, the pollution grade, the water content, the regression dielectric constant, the regression conductivity, temperature and working time to determine a liquid health degree score; and determining a liquid residual service life according to the liquid health degree score and cumulative working time. The overall calculation process from original parameter acquisition to health evaluation and life determination is formed.

The invention discloses a chemical detection method for oculent.The chemical detection method relates to the technical field of chemical analysis, the oculentcomprises ganciclovir, yellow vaseline, lanolin, liquid paraffin, white vaseline, glycerin, ethylparaben and vitamin E. The method comprises the following steps that (a) the content of ganciclovir in the oculent.The content of ganciclovir in the oculent.The content of ganciclovir in the oculentis is measured through a high performance liquid chromatography; (b) carrying out quality control on the lanolin raw material, namely measuring an acid value, a saponification value and a peroxide value; (c) carrying out wool fat related quality monitoring on the oculentum finished product, wherein the wool fat related quality monitoring comprises determination of a peroxide value; according to the method, chromatographic conditions are optimized, an exclusive impurity detection method is established, and raw materials are associated with finished product detection, so that the quality control problem of ganciclovir oculentum is solved.

The invention is applicable to the technical field of food quality safety nondestructive testing, and relates to a crude fish oil quality nondestructive testing method based on a fusion spectrum technology, which comprises the following steps: collecting crude fish oil with different qualities and oxidation degrees, and testing indexes such as acid value, peroxide value and iodine value of the crude fish oil with different qualities; collecting Raman spectrum information of different wavelengths of the crude fish oil by using a visible light band laser and a near-infrared band laser respectively; the method comprises the following steps: carrying out smoothing, baseline reduction, normalization and other processing on a multiband Raman spectrum, carrying out data fusion of a data level, carrying out spectral signal correction by adopting derivative preprocessing on the basis, and respectively establishing PLSR prediction models aiming at an acid value, a peroxide value and an iodine value for the processed data; the detection method provided by the invention improves the accuracy of nondestructive detection of the quality of the crude fish oil in production and storage, and is of great significance to rapid evaluation of the quality of the crude fish oil.

The application discloses a kind of intelligent detection equipment for rapeseed oil production, it is related to rapeseed oil production detection technical field, including guide frame, detection mechanism is slidably arranged on guide frame, detection mechanism is slidably arranged on the slide of guide frame, and docking assembly is arranged on the slide, and filter assembly, spectrum detection assembly are arranged on the one side of slide;The other side of slide is provided with cleaning assembly;Detection sample is transmitted to filter assembly by docking assembly and is filtered, and then is transmitted to spectrum detection assembly by filter assembly and is detected;Spectrum detection assembly includes detection box arranged on the slide, and detection pipeline is arranged in the detection box, and detection pipeline is arranged in the form of serpentine coil;The present application can complete detection operation by regular cruise, and sample is extracted for detection, and the acid value, peroxide value, flowability and uniformity of rapeseed oil can be detected, which is rich in function and can reach quality control standard.

The invention discloses a phospholipid composition for a high-stability soft capsule and a preparation method of the phospholipid composition. The composition is prepared from the following components in percentage by mass: 92 to 97 percent of main material phospholipid, 1 to 5 percent of medium-chain triglyceride oil, 0.1 to 2 percent of MCA4C cold-melting and heat-setting colloid and 0.2 to 3 percent of vegetable fatty acid, the acid value of the composition is 23-26 mg KOH / g, the moisture content is less than 0.2%, and the viscosity at 25 DEG C is less than 6000 mPa.s. The preparation method comprises the following steps: adding the vegetable fatty acid into the main material phospholipid to adjust the acid value, adding the medium-chain triglyceride oil, and cooling to obtain a prefabricated oil phase; the preparation method comprises the following steps: dissolving MCA4C cold melting and heat setting type colloid in water; adding the aqueous solution into the oil phase, and carrying out high-speed shearing emulsification and homogenization treatment; performing vacuum dehydration until the moisture is 1t; and 0.2%. Through a three-dimensional network structure formed by the MCA4C cold-melting heat-setting colloid, the coefficient of thermal expansion and cold contraction is reduced, and oil leakage and moisture migration are prevented; and accurate acid value control and MCA4C cold-melting and heat-condensing colloid synergistically act to prevent layering. The composition keeps high content of effective components, and has good filling performance and storage stability at the same time.

A process for reducing the acid number of fats and oils, which have an acid number in the range of 1 to 250, to acid numbers below 1, characterized by feeding the fats and oils to be reduced with respect to their acid number, as well as a metal salt of fatty acids with 14 to 20 carbon atoms and a metal of group VIIIB, IB, or IIB of the periodic table of elements as a homogeneous esterification catalyst, into the upper part of a countercurrent esterification column, wherein the fats and oils have a temperature of 180 to 300 °C upon entering the column, while the column is charged from below with a mono- or polyhydric alcohol with 1 to 18 carbon atoms, wherein this alcohol evaporates upon entering the column and is additionally superheated to temperatures in the range of 150 to 300 °C, and wherein the fats and oils are discharged downwards via the internals present in the column.While the alcohol flows upwards as vapor in countercurrent flow, and the reaction water formed as well as excess alcohol are removed as vapors at the top of the column, an operating pressure in the column is set in the range of 1 to 16 bar, the mass ratio of alcohol to fat or oil is set in the range of 0.01 to 0.3, and the residence time of the liquid phase within the column is between 10 minutes and 180 minutes.

The invention relates to the technical field of food storage. The invention provides a marker for detecting oxidation rancidity of thin-skinned walnuts and a method for detecting oxidation rancidity of thin-skinned walnuts. The marker comprises 10 volatile compounds and 12 oxidized triglyceride molecules. By means of the marker, oxidation rancidity of the thin-skinned walnuts can be effectively judged, compared with a traditional acid value, peroxide value and sensory judgment method, the method is more accurate and sensitive, and the quality deterioration risk and the oxidation process of the thin-skinned walnuts can be accurately monitored. In addition, the oxidative rancidity marker can be regulated and controlled through exogenous fumigation treatment with 900 [mu] L / L NO, and then oxidative rancidity is inhibited. Therefore, the method has good production practice guidance and application value.

The invention relates to the technical field of chemical analysis of oil products, and particularly discloses a method for judging an acid value titration end point of electric oil based on a color titration method. The method comprises the following steps: acquiring time-varying data of a solution color depth value in a titration process in real time by virtue of a spectrum color sensor, fitting a color titration curve by virtue of a high-order polynomial, calculating the curvature of the fitted curve point by point, and taking a curvature peak point which appears for the first time and has a curvature value of 0.2-2 as a titration end point. The method overcomes the defects that a traditional indicator titration method is strong in subjectivity, an automatic potentiometric titration method is easy to pollute an electrode and has no potential jump, and the like, avoids adverse effects of colors of different oil samples on the RGB value of the titration end point when the end point is judged by the color RGB value in an existing color titration method, and is objective and accurate in titration end point judgment, excellent in repeatability and high in accuracy. The method is suitable for measuring the acid value of electric oil. The method is easy and convenient to operate, economical, environmentally friendly, efficient, accurate and high in application and popularization value.

The utility model discloses a device for rapidly and quantitatively detecting the acid value of fried oil, and relates to the technical field of edible oil detection. The device is of an injector structure and comprises a cylinder body, a sample injection needle head and a push rod, a sample injection needle head is arranged at the front end of the cylinder body; the push rod can reciprocate relative to the inner wall of the barrel; an oil sample inlet dissolving agent and color developing agent indicating line, an oil sample inlet indicating line and an acid value scale line are arranged on the outer wall of the cylinder body; a piston is arranged at the front end of the push rod, a connecting rod is arranged on the piston, the device is further provided with a magnetic stirring system, the magnetic stirring system comprises a stirring rod and a rotation driving part, and magnetic parts are arranged on the stirring rod and the rotation driving part respectively. And the magnetic part on the stirring rod and the magnetic part on the rotary driving part are arranged in a manner that heteropoles attract each other and face each other. The edible oil oleic acid detection device is simple to operate, high in detection result accuracy and suitable for popularization.

The particle diameter of a lipid membrane structure can be controlled by a simple method when producing the lipid membrane structure. A method for producing a lipid membrane structure-containing composition includes: (A) a hydrogenated phospholipid having an acid value of 5 mg KOH / g or more; (B) a compound represented by formula 1; and (C) water. The method includes a dispersing step of mixing the component (A), the component (B), and the component (C) to obtain a dispersion in which a lipid membrane structure having a particle diameter of 10 nm or more and 200 nm or less is spontaneously formed. The dispersing step includes determining the concentration of the component (A) in the dispersion depending on the target particle diameter of the lipid membrane structure included in the lipid membrane structure-containing composition.

The application discloses a rapeseed oil quality identification method, comprising the following steps: obtaining the concentration data of the processing residual electroactive substances in the rapeseed oil by using an electrochemical detection method; collecting the oxygen partial pressure, relative humidity, thermodynamic temperature and light intensity data of the storage environment; constructing a synergistic action quantification model to obtain a synergistic action coefficient; constructing a nonlinear decay acceleration model to obtain a quality decay acceleration factor; detecting the acid value and peroxide value data; and combining a synergistic action deviation correction mechanism to calculate a comprehensive quality index. The method solves the problem that the existing technology cannot capture the implicit quality decay by cross-domain technology fusion, realizes accurate identification, and provides a reliable scheme for rapeseed oil quality evaluation.

The application discloses a kind of preparation crude fatty acid process in the quantitative calculation method of acid comprehensive utilization rate, belong to the quantitative calculation technical field of acid comprehensive utilization rate, comprising: the acid value of crude fatty acid prepared and the raw material soap stock used in preparation is determined, the amount of substance of acid consumed in acidification reaction is calculated after obtaining corresponding data;Determine the strong acid acidity of total process effluent, the amount of substance of acid remaining in total process effluent is calculated after obtaining corresponding data;According to the amount of substance of acid added and the data calculated above, the amount of substance of acid used to neutralize excess monobasic alkali in saponification reaction is calculated;Finally, the acid comprehensive utilization rate is calculated.The application analyzes acid utilization path by process flow, determines relevant parameters, constructs quantitative method, realizes the quantitative calculation of acid comprehensive utilization rate, is simple and convenient and easy to operate and realizes, can significantly reduce raw material consumption and salt and acidity in wastewater, has important significance to improve product yield and reduce environmental pollution.

The invention discloses a rapeseed oil quality identification method. The method comprises the following steps: acquiring concentration data of processing residual electroactive substances in rapeseed oil by adopting an electrochemical detection method; acquiring oxygen partial pressure, relative humidity, thermodynamic temperature and illumination intensity data of the storage environment; constructing a synergistic effect quantitative model to obtain a synergistic effect coefficient; constructing a nonlinear attenuation acceleration model to obtain a quality attenuation acceleration factor; detecting acid value and peroxide value data; and calculating a comprehensive quality index in combination with a synergistic effect deviation correction mechanism. According to the method, the problem that recessive quality attenuation cannot be captured in the prior art is solved through cross-domain technology fusion, accurate identification is realized, and a reliable scheme is provided for rapeseed oil quality evaluation.

The invention relates to the technical field of oil product detection, and discloses a detection device for simulating an oil product acid value standard substance and a detection method thereof.The detection device comprises a material storage barrel, a detection assembly is arranged on the periphery of the material storage barrel, the detection assembly comprises a positioning base, a movable plate is arranged in the positioning base in a sliding mode, and the movable plate is limited through a piston plate. In the downward moving process of the detection electrode, the vibration clamping plate is driven to generate accurate rotation deviation through the interaction of the extrusion convex block and the fixed extrusion strip. The motion synchronously realizes soft scraping and axial micro-amplitude vibration of the electrode rod body, so that a composite cleaning effect is formed, and micro-bubbles and oil stain films attached to the surface of the electrode are effectively removed. According to the design, the cleaning function is achieved by fully utilizing the movement in the detection process, an additional power source is not needed, the structure is simplified, meanwhile, the automation level of equipment is improved, the electrode surface state is remarkably improved, potential signals are made to respond more quickly, reading is more stable, and the accuracy and reliability of acid value detection are greatly improved.

This invention relates to the field of aquaculture technology, and more particularly to a growth-promoting composition for aquatic animals and its preparation method. The method involves acquiring multi-dimensional process information and performing step-by-step comparisons based on preset thresholds. First stirring parameters are adjusted based on the comparison between uniformity and a preset uniformity; second stirring parameters are adjusted based on the synergistic comparison between transparency change rate and temperature change rate; a cooling method is determined based on the comparison between acid value and a preset acid value; abnormalities in the encapsulation stage are identified based on the comparison between encapsulation rate and a preset encapsulation rate; conditioning parameters are calculated based on free oil content, hardness, and viscosity, and low-temperature conditioning parameters are adjusted accordingly; after processing, the mixture is pulverized and sieved using a preset mesh sieve to obtain a powdered composition. This invention, through multi-parameter coupled control, precisely optimizes the dispersibility, solubility, and encapsulation stability of the active ingredients, thereby improving the emulsification and dispersion efficiency, enteric solubility, and appetite-stimulating and growth-promoting effects of the composition.

The invention discloses an anionic oxidized Fischer-Tropsch wax nano-emulsion and a preparation method thereof, and belongs to the technical field of emulsion preparation. The emulsion is prepared from 20%-40% of oxidized Fischer-Tropsch wax, 0.5%-1.0% of sodium hexadecyl sulfonate, 0.5%-1.0% of sodium hexadecyl benzene sulfonate, 0.5%-2.0% of potassium cocoate, 0.2%-0.4% of sodium hydroxide and the balance deionized water. Wherein the acid value of the oxidized Fischer-Tropsch wax is 10-20 mg KOH / g, and the drop melting point is 60-90 DEG C. According to the invention, a pure anionic emulsifier compounding system is adopted, the blank of anionic Fischer-Tropsch wax emulsion is filled, the emulsifier dosage is low, the emulsion particle size is 300-500nm, the dispersity and centrifugal and thermal cycling stability are excellent, the production process is simple and easy to amplify, and the preparation method can be widely applied to the fields of printing ink, coatings, hot melt adhesives and the like.

To provide an alcoholic beverage imparted with or improved in spicy or herb-like refreshing feeling.SOLUTION: The alcoholic beverage has an extract content of 5. 0w / v% and an acid value of ≥ 0. 01g / 100ml and contains ≥ 0. 1mg / L phenethyl alcohol and ≥ 0. 1mg / L ethyl decanoate.SELECTED DRAWING: None

The invention belongs to the technical field of data processing, and particularly relates to a thermal power key oleic acid value monitoring method based on a capacitance method. Compared with an existing method for measuring oil samples through a titration method after the oil samples are collected, the method has the advantages that the measurement of chemical indexes is converted into the measurement of electrical signals; the acid value of the oil liquid can be measured more efficiently and quickly, the measurement result is output, and continuous monitoring of the oil liquid of the thermal power equipment is maintained.