62 results about "Acid value" patented technology

The utility model relates to a system for reducing the acid value of hydrolysate in the separation and washing process of dimethyl dichlorosilane hydrolysate. Comprising three stages of coalescers, dimethyl dichlorosilane acidic hydrolysate enters the system from the first stage of coalescer, process water enters the system from the third stage of coalescer, the acidic hydrolysate and diluted hydrochloric acid or process water are mixed in each stage of coalescer, oil-water two-phase separation is completed through multiple times of washing and coalescence, and meanwhile the acid value of the hydrolysate is reduced; each stage of coalescer comprises two static mixers connected in series, a group of prefilters and a large coalescer, the coalescer is Z-shaped, and four stages of filter elements are arranged in each stage of coalescer. Through repeated tests, a modified polyvinylidene fluoride filter element of Pall Company is finally selected, and after continuous three-stage coalescer treatment, the acid value of dimethyldichlorosilane hydrolysate can be reduced to 10 PPM or below.

To provide a method for suppressing an increase in acid value of a frying oil and fat composition.SOLUTION: A method for suppressing an increase in acid value of a frying oil and fat composition, the method comprising adding to an edible oil and fat at least one emulsifier selected from the group consisting of polyglycerin-condensed ricinoleic acid ester, polyglycerin fatty acid ester, sucrose fatty acid ester, and sorbitan fatty acid ester, wherein further addition of a conditioned oil enables further suppression of the increase in acid value.SELECTED DRAWING: None

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.

Provided is a pore improving agent comprising a composition containing a lipid membrane structure formed from a phospholipid having an acid value of 5 mg KOH / g or more. Also provided is a skin improving agent comprising a composition containing a lipid membrane structure formed from a phospholipid having an acid value of 5 mg KOH / g or more.

A grain and oil quality automatic detection device disclosed by the present invention comprises a belt conveyor, a first detection mechanism, a second detection mechanism, a driving mechanism, a cleaning mechanism and a collection mechanism, the belt conveyor is provided with a plurality of placing sleeves for bearing oil sample tanks, the first detection mechanism is used for detecting color, impurity and transparency of oil samples, and the second detection mechanism is used for detecting color, impurity and transparency of the oil samples. The second detection mechanism is used for detecting the acid value, the peroxide value and the moisture of an oil sample, the driving mechanism drives the second detection mechanism to move between a detection position and a cleaning position, the cleaning mechanism is used for performing heating flushing and hot air drying on a detection head, and the collection mechanism is used for performing separation and recovery treatment on detected oil and a sample tank; according to the device, the whole process automation of continuous and automatic conveying of edible oil samples, image and physical and chemical property detection, automatic cleaning and drying of a detection head and sample tank recovery is realized, and the problems of low efficiency, high pollution risk and high manual participation degree of an existing detection mode are solved.

The invention discloses a quantitative calculation method for the comprehensive utilization rate of acid in a crude fatty acid preparation process, and belongs to the technical field of quantitative calculation of the comprehensive utilization rate of acid, and the quantitative calculation method comprises the following steps: measuring the prepared crude fatty acid and the acid value of a raw material nigre used for preparation, and calculating the amount of substance of acid consumed by acidification reaction after corresponding data is obtained; measuring the acidity of the strong acid in the total process effluent, and calculating the amount of residual acid substance in the total process effluent after corresponding data is obtained; calculating the amount of substance of the acid for neutralizing the excessive monobasic base in the saponification reaction according to the amount of substance of the added acid and the calculated data; and finally calculating the acid comprehensive utilization rate. According to the method, the acid utilization path is analyzed through the technological process, relevant parameters are measured, the quantitative method is constructed, quantitative calculation of the comprehensive utilization rate of the acid is achieved, the method is simple, convenient and easy to operate and achieve, raw material consumption and salinity and acidity in waste water can be remarkably reduced, and the method has great significance in improving the product yield and reducing environmental pollution.

The invention relates to a method for detecting the peroxide value and the acid value of food, and belongs to the technical field of detection instruments. Putting a to-be-detected sample into the reagent bottle, and then dropwise adding a detection reagent into the reagent bottle; in the process, a light source is used for irradiating the reagent bottle, and a sensor is used for receiving light reflected by the reagent in the reagent bottle; the control system detects the light received by the sensor; when the color of the received light is a preset value, dropwise adding of the detection reagent is stopped; recording a titration end point, and determining a peroxide value; the acid value can be measured by the same method, and the color of the solution judged by the titration end point for measuring the peroxide value is different. According to the invention, light is utilized to irradiate a reagent and a sensor is utilized to carry out color detection, so that automatic detection of a peroxide value and an acid value can be realized, the detection precision can be improved, automatic detection can be carried out for a long time, and the detection efficiency is improved; meanwhile, workers are prevented from inhaling gas with pungent smell, and harm of chemical reagents to experimenters is reduced.

The present invention provides a method for detecting the acid value in a low concentration in a photovoltaic adhesive film. The method includes the following steps: preparation of a sample to be tested; testing stage: first, the content and types of volatile acids of the sample to be tested are detected by headspace gas chromatography-mass spectrometry (HS-GC-MS), then the sample after headspace treatment is recovered and placed in a solvent, and swelling extraction is carried out by water bath ultrasonic treatment to obtain an extraction solution. After titration testing with an automatic potentiometric titrator in combination with an indicator, the acid value C is obtained; analysis of the test results. For the first time, it is proposed to combine headspace gas chromatography-mass spectrometry (HS-GC-MS) with full-automatic potentiometric titration to detect the acid value in the adhesive film. The combination of back titration and indicator method is used to improve the accuracy of detection, and for the first time, it is innovatively proposed to simulate the aging environment in a headspace vial to more accurately and comprehensively detect the acid value of the photovoltaic adhesive film.

The present invention belongs to the field of oil detection, and specifically discloses a device and method for online electronic tongue identification of tea oil quality during supercritical extraction. A mixed solution of particle liquid and surfactant is added to an autoclave; the potential signal of the electronic tongue sensor arranged in the autoclave is read, and then converted by the Weber-Fechner law on the PC side, and finally a taste information file is obtained; then the taste information is substituted into the model through the preset tea oil acid value, peroxide value, total tocopherol, sterol, and squalene model on the PC side, and the corresponding physical property parameters and substance content are obtained to comprehensively evaluate the quality of tea oil; this method can complete the determination of a sample in a relatively short time, based on the mode of online electronic tongue identification during supercritical extraction, and realizes online evaluation of tea oil quality. It is simple, fast, low-cost, environmentally friendly, and has great advantages over traditional chemical methods.

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 relates to the technical field of industrial control systems, and provides an intelligent control method and system for a sea buckthorn fruit oil refining process. Based on a nonlinear relationship between a concentration parameter and a production parameter of the sea-buckthorn raw material in the first reactor, determining an adaptive temperature and an enzyme dosage, and controlling the heating power and the stirring rate of the first reactor; based on the acid value deviation between the acid value of the sea-buckthorn raw material in the second reactor and the target value and the alkalinity concentration, generating a control parameter and a flow instruction for controlling the second reactor so as to control the second reactor to operate; the pigment concentration and the adsorbent activity at the next moment are predicted according to the pigment concentration, the adsorbent activity and the second temperature of the sea-buckthorn raw material in the third reactor, and a combination of the adsorbent addition amount and the decoloration time is constructed to control the third reactor. Accurate control and self-adaptive optimization in the production process are achieved, the control precision of a control system in the production process is improved, and the process efficiency and product quality of sea buckthorn fruit oil refining are remarkably improved.

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.

The present invention relates to the technical field of hyperdispersants, particularly to the field of IPC C08L23, and further to a method for preparing and applying a hyperdispersant. The method comprises at least the following steps: (1) adding a hydroxy acid, a solvent, and a catalyst to a reactor equipped with a water separator to carry out an esterification reaction; and (2) tracking the reaction using infrared absorption spectroscopy. When the acid value reaches 70 to 90 mg KOH / g, a capping agent is added, and the reaction is carried out at a temperature of 20 to 40 mg KOH / g, followed by cooling and vacuum distillation. The hyperdispersant prepared by the present invention can not only improve the dispersibility of pigments in plastic systems, but also enhance the tinting strength of the pigments.

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

This invention discloses a continuous method for preparing glycolide and the obtained glycolide. The method includes a step of depolymerizing glycolic acid oligomers in the presence of inorganic phosphorus to obtain glycolide. This method solves the problem that during bulk depolymerization, the depolymerization reaction easily produces decarboxylation side reactions, generating formic acid and acetic acid byproducts, leading to a decrease in glycolide yield, purity, and an increase in acid value. Using the method of this invention, the glycolide yield is >95.5%, and the glycolide specifications are: purity >95.0%, acid value <300 μmol / g, formic acid content <10 μg / g, and acetic acid content <20 μg / g, achieving good technical results.

The invention discloses a method for simultaneously removing ash content, reducing an acid value and reducing total precipitation of marine oily pollutants, and belongs to the technical field of waste oil recycling. The invention aims to solve the problems that the process of treating oily pollutants of ships in the prior art is complicated, and various impurities cannot be efficiently removed at the same time. The preparation method comprises the following steps: heating a ship oily pollutant raw material to 75-85 DEG C, adding a composite treatment agent which accounts for 5% of the mass of the ship oily pollutant raw material and is formed by compounding a polyoxypropylene polyoxyethylene ether block copolymer, triethanolamine, diethylenetriamine and solvent oil, and reacting at constant temperature for 1-2 hours; adding water accounting for 5% of the mass of the raw materials, and continuing constant-temperature reaction for 1-2 hours; and finally, heating the mixture to 90-95 DEG C, and carrying out centrifugal separation to obtain the qualified marine fuel oil. Through the one-agent multi-effect and integrated process, the process is simple, ash, acidic substances and total precipitates in the raw materials can be efficiently and synergistically removed, the product quality meets the national standard requirement, and the method has remarkable economic and environment-friendly benefits.

To provide a highly concentrated and stable silicic acid solution.SOLUTION: The silicic acid solution according to the present invention contains silica and an acid, has a pH of 3.0 or less, contains 8% or more of silica in terms of SiO2, and has a content of gel-like materials containing silica having a size of 3 μm or more of 1000 particles / ml or less. The silicic acid solution having these characteristics exhibits excellent long-term stability.SELECTED DRAWING: None

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.

The present application discloses a non-destructive determination method for the peroxide value and acid value of virgin olive oil based on fluorescence inner filter effect correction, belonging to the field of spectral technology detection. First, olive oil samples with different oxidation degrees are obtained and the standard values of peroxide value and acid value are tested; absorption spectra and laser-induced fluorescence spectra are collected; candidate characteristic fluorescence wavelengths are determined through spectral analysis; the influence of fluorescence inner filter effect on the detection results under different candidate characteristic fluorescence wavelengths is verified to obtain the optimal characteristic fluorescence wavelength; a quantitative prediction model for the peroxide value and acid value of olive oil is established with the fluorescence intensity and absorption coefficient at the optimal characteristic fluorescence wavelength, the absorption coefficient at the excitation wavelength, and the standard values of peroxide value and acid value. The modeling of the present invention only requires absorption signals at two wavelengths and a fluorescence signal at a single wavelength, which can effectively eliminate the influence of fluorescence inner filter effect on the detection results and achieve accurate, rapid and non-destructive prediction of the peroxide value and acid value of different brands of olive oil.

The invention provides a full-automatic acid value determinator, and relates to the technical field of acid value determinators, the full-automatic acid value determinator comprises a detection box, a box door is rotatably mounted at the bottom of the front surface of the detection box, a placement table is fixed in the detection box, a turntable is rotatably mounted on the placement table, and four detection cups are placed on the turntable through placement grooves; a soaking box is fixed to the tail end of the containing table, a detection assembly is arranged between the soaking box and the rotary disc and comprises a circular plate, and the circular plate is rotationally installed on the containing table through a shaft rod. After the used detection assembly enters the position of the soaking box and is connected with the absolute ethyl alcohol storage box at the upper end, pipelines and parts of the detection assembly are cleaned and soaked, residual detection liquid is cleaned up, and the detection assembly can be continuously used under the condition that the detection assembly is not taken out, so that the use efficiency of equipment is improved, and dust entering caused by frequent opening of a box door is avoided.

The invention discloses a method for predicting the quality of frying oil assisted by artificial intelligence, and belongs to the technical field of food quality detection. The method comprises the following steps: firstly, determining an oxidized triglyceride early warning threshold value through temperature-time-index three-dimensional modeling on the basis of relevance between the oxidized triglyceride content and physicochemical indexes such as acid value, polar substances and peroxide value in a grease frying process; secondly, a layered random forest prediction model is constructed based on multi-factor and multi-index relation analysis, the first layer predicts the oxidized triglyceride content based on the frying temperature, time and fatty acid composition, and the second layer synchronously outputs an acid value, a peroxide value and a polar component in combination with an oxidized triglyceride prediction value. The oxidation risk can be recognized in advance, the problems that traditional indexes are high in hysteresis quality and high in detection cost are solved, and early warning and accurate prediction of the oxidation degree of the frying oil are achieved.

This oil / fat composition for frying comprises an edible oil / fat and a silicone and satisfies the following requirements (1) and (2). Requirement (1): When, in a molecular weight distribution curve of the silicone which is measured in terms of polystyrene by gel permeation chromatography (GPC), the molecular weight at the rising of a peak having a smallest molecular weight is denoted as Amin and the molecular weight at the falling of a peak having a largest molecular weight is denoted as Amax, the expression A1 / 2 = ((Amax-Amin) / 2)+Amin is satisfied and the ratio X (%) of the sum of peak areas appearing in the molecular weight range of Amin to A1 / 2 inclusive with respect to the sum of all of peak areas is 25.0% to 65.0% inclusive. Requirement (2): When, in a molecular weight distribution curve of the silicone which is measured in terms of polystyrene by gel permeation chromatography (GPC), the ratio of the sum of peak areas appearing in the molecular weight range of 103.5 to 104.5 inclusive with respect to the sum of all peak areas is denoted as Q (%) and the content ratio of the silicone with respect to the whole mass of the oil / fat composition for frying is denoted as P (ppm by mass), the value determined by the expression Q (%)×P (ppm by mass)×10-2 is 0.80 to 1.40 inclusive.

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 invention relates to the field of phosphate fire-resistant oil detection, and particularly discloses a method for comparing the capacity of different types of zeolite molecular sieves for adsorbing acidic substances in phosphate fire-resistant oil. The test method comprises the following steps: S1, determining the acid value of the phosphate fire-resistant oil; s2, cleaning and drying the zeolite molecular sieve; s3, uniformly mixing the zeolite molecular sieve and the phosphate fire-resistant oil to obtain a mixture; s4, sealing and storing the mixture in a constant-temperature drying box; s5, sampling and detecting the acid value of the phosphate fire-resistant oil at set intervals, and recording; s6, drawing a measured acid value-time curve of the phosphate fire-resistant oil; the experimental operation is simple, the period is short, and the method is suitable for comparing the capabilities of different types of zeolite molecular sieves for adsorbing acidic substances in phosphate fire-resistant oil.

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.