745 results about "Saponification" patented technology

The invention relates to the technical field of complex lithium-based lubricating grease, and discloses a wide-temperature high-extreme-pressure environment-friendly complex lithium-based lubricating grease composition which comprises the following components in percentage by mass: 80-90% of base oil, 10-15% of a thickening agent and 0-5% of an additive, the base oil is a mixture composed of IV-type base oil and polyalkyl cycloalkane, the compatibility between oil soap can be improved by adding the polyalkyl cycloalkane, and the stability of the composite lithium-based grease is improved; the thickening agent is composite lithium soap formed after saponification reaction of higher fatty acid, amino acid and lithium hydroxide, fatty dibasic acid commonly used in the prior art is replaced with the amino acid, and high extreme pressure anti-wear performance can be achieved by adding a very small amount or without adding a solid extreme pressure anti-wear agent or phosphorus, boron and other extreme pressure anti-wear agents; the additive is selected from one or more of a series of materials, and the series of materials comprise but are not limited to an extreme pressure anti-wear agent, an antioxidant and an anti-rust agent.

The invention discloses an ethylene-vinyl alcohol copolymer and a preparation method thereof, and relates to the technical field of resin. According to the technical scheme, the preparation method comprises the following steps: adding ethylene, low-carbon alkane, alkyl acid ethyl ester, alkyl acid vinyl ester and a carbon-carbon skeleton initiator into a reaction kettle, and carrying out a free radical polymerization reaction; adding a polymerization inhibitor to terminate the reaction, removing low-carbon alkane, unreacted ethylene and alkyl acid vinyl ester, and preparing the reaction liquid into an alcoholic solution; adding a catalyst into the alcohol solution for saponification reaction, and then performing acid pickling, water washing and drying to obtain the ethylene-vinyl alcohol copolymer. The low-carbon alkane which is low in boiling point, easy to vaporize and high in latent heat of vaporization and the saturated alkyl acid ethyl ester with good solubility are adopted as the mixed solvent to replace a traditional alcohol solvent, so that removal and control of reaction heat are facilitated, generation of insoluble gel is reduced, a copolymer with narrow molecular weight distribution is easy to obtain, and the method is suitable for industrial production. The cost that azeotrope formed by the alcohol solvent and the monomer is difficult to separate and recover is greatly reduced, and the production efficiency is improved.

The invention relates to a moisturizing and wrinkle fading composition containing recombinant collagen and application of the moisturizing and wrinkle fading composition. The moisturizing and wrinkle fading composition containing the recombinant collagen comprises dipalmitoyl hydroxyproline, butyrospermum parkii fruit fat unsaponifiable matter, sodium hyaluronate, palmitoyl tripeptide-1 and the recombinant collagen. The invention creatively finds that the composition consisting of the dipalmitoyl hydroxyproline, the butyrospermum parkii fruit fat unsaponifiable matter, the sodium hyaluronate, the palmitoyl tripeptide-1 and the recombinant collagen can deeply nourish the skin, especially the lip skin, effectively lock moisture and relieve dryness, and also can remarkably lighten cheilogramma and repair damaged skin, so that the composition has the effects of nourishing the skin, especially the lip skin. And the five components have a certain synergistic effect on the effects, so that the lip care product is suitable for lip care products, and is mild, non-irritant and good in stability.

The invention belongs to the field of flotation, and particularly relates to a lithium-containing china clay ore flotation method which comprises the following steps: carrying out flotation on to-be-separated minerals of lithium-containing china clay ore in a flotation reagent containing a collecting agent to obtain lithium china clay ore concentrate; the collecting agent is characterized in that the collecting agent is a compound shown in the formula 1 # imgabs0 #; and / or a product obtained by carrying out an addition reaction on a formula 2 (R-NH2) and a formula 3 # imgabs1 # in advance and then carrying out a saponification reaction with an alkali. According to the collecting agent for the lithium china clay ore, the component shown in the formula 1 is innovatively adopted as the collecting agent for the lithium china clay ore, in this way, on the basis of intermolecular coupling of beta-NH-and-COOM, the collecting agent can accidentally adapt to the surface characteristics of target minerals of the lithium china clay ore, high-selectivity collecting can be achieved, and effective collecting under the low-temperature and mild conditions can be achieved.

The invention discloses a supported composite zinc catalyst and application thereof in biodiesel, and belongs to the technical field of catalyst preparation. The supported composite zinc catalyst provided by the invention comprises the following components: an AlPO4-SiO2 composite carrier, a zinc-cerium bimetallic active component supported on the carrier, and a hydrophobic modification layer coated outside the active component. The supported composite zinc catalyst has higher tolerance to moisture and free fatty acid in the waste grease, saponification side reaction is reduced, raw material pretreatment requirements are simplified, the catalyst is easy to recover and reuse, and production cost and environmental burden are remarkably reduced.

The invention relates to the technical field of detection methods, and discloses a method for determining the content of triterpene alcohol in camellia oil, which comprises the following steps: (1) saponifying and extracting a camellia oil sample, and loading on a machine to be detected; then carrying out silanization derivation treatment, and loading to be detected again; (2) beta-amyrin, butyryl whale alcohol and lupeol are respectively prepared into standard solutions, the standard solutions of the beta-amyrin and the butyryl whale alcohol are directly put on a machine to be detected, and the standard solution of the lupeol is put on the machine to be detected after being subjected to silanization derivation treatment; (3) gas chromatography detection: the temperature rise mode of the column temperature is that the temperature is kept at 180-190 DEG C for 1-5 min, then the temperature is raised to 260-300 DEG C at the rate of 10-15 DEG C / min, and the temperature is kept for 20-40 min; the split ratio is (20-40): 1. According to the method, the triterpene alcohol is measured by adopting a gas chromatography external standard method, and the result is more scientific, advanced, accurate and reliable.

The present application discloses a cleaning agent, a cleaning method and a cleaning machine for cleaning 3D printed components, and relates to the field of 3D printing technology. Using alkaline inorganic compounds and water as the main raw materials of the cleaning agent, the alkaline inorganic compounds and esters can undergo saponification reaction to generate alcohols and carboxylates soluble in water, thereby achieving the purpose of cleaning. The use of traditional cleaning agents such as alcohol or isopropanol can be reduced or directly eliminated, thereby reducing costs and reducing the irritation of cleaning agents. At the same time, the use of flammable and explosive organic solvents such as alcohol is reduced, and the safety of operation is improved during the use and storage of cleaning agents.

The invention relates to a preparation method and application of a collophanite flotation reagent, illegal cooking oil is used as a raw material, filtration and impurity removal are performed, the filtered illegal cooking oil is saponified to prepare fatty acid soap, and the saponified fatty acid soap is mixed with a surfactant to prepare a collophanite flotation collector. The swill-cooked dirty oil is turned into wealth, the environment is protected, the prepared flotation reagent and the surface active agent are mixed to be applied to the flotation process, the selectivity and the collecting performance of phosphorite in flotation can be obviously enhanced, efficient recovery of phosphorite is achieved, the technological process is simple and efficient, the sorting index is excellent, and good application prospects are achieved.

Provided are industrial processes for producing an organic acid alky ester from a feedstock containing organic acids and / or saponifiables, comprising: countercurrently contacting a feedstock with an organic alkylating reagent over two or more vessels or stages at temperature between 100° C. and 400° C. and pressure between 0.1 barg and 355 barg while simultaneously removing water and / or glycerin with unreacted alkylating reagent from the final vessel or stage to result in a first reaction method product containing organic acid alkyl esters, followed by a choice of using the alkyl esters as-is, purifying the organic acid alkyl esters from the first reaction product mixture or subjecting the first reaction product mixture to an additional transesterification reaction to convert saponifiables into additional organic acid alkyl esters, then purifying the organic acid alkyl esters from this second reaction method product.

The invention belongs to the field of steel pipes, and particularly relates to a method for manufacturing a cold drawn pipe, which comprises the following steps of: obtaining a raw material steel pipe which comprises the following elements in percentage by weight: less than or equal to 0.20 percent of C, less than or equal to 0.50 percent of Si, less than or equal to 1.70 percent of Mn, less than or equal to 0.025 percent of P, less than or equal to 0.035 percent of S, less than or equal to 0.30 percent of Cr, less than or equal to 0.50 percent of Ni, less than or equal to 0.10 percent of Mo, 0.05-0.15 percent of V and the balance of Fe; the method comprises the following steps: pretreating a raw material steel pipe, wherein the pretreatment sequentially comprises acid washing, alkali washing, water washing, phosphating, water washing and saponification; and carrying out cold drawing and annealing on the pretreated steel pipe to obtain the cold-drawn pipe. The invention also relates to the cold drawn pipe. According to the method disclosed by the invention, pollution between bath solutions in pretreatment is reduced, the surface quality after pretreatment is improved, and the upper yield strength, tensile strength and normal-temperature impact absorption energy of the cold-drawn pipe are improved, so that the cold-drawn pipe has relatively good toughness and welding performance.

The invention discloses a lubricating process of a surface treatment process of a corrosion-resistant steel member, which comprises the following steps: S1, rust removal: carrying out first rust removal on the steel member by adopting a chemical mode, and then carrying out second rust removal on the steel member by adopting a mechanical mode; s2, oil removal: removing non-saponified oil stains by using an organic solvent, and removing saponified animal and vegetable oil by using an alkaline solvent; s3, phosphate is adopted for phosphating treatment, and a microporous structure layer is formed; s4, spraying is conducted on the steel component, and a metal coating is formed; s5, spraying an organic sealing layer on the metal coating; s6, drying: drying by adopting a dryer or a natural air-drying mode; and S7, sealing pores by using a silane impregnant to form a hydrophobic protection layer. Compared with the prior art, the problems that the protection effect is poor, severe environments cannot be handled and the service life is short due to the fact that anti-corrosion paint is mostly coated on the surfaces of the steel components for protection in existing steel component anti-corrosion treatment can be solved.

The invention provides a method for inhibiting oxidation of variable valence rare earth ions in the rare earth ion extraction and separation process, and belongs to the technical field of rare earth hydrometallurgy. In the extraction and separation process of a rare earth solution system, under the condition that an environment-friendly diluent is used, a certain amount of composite liquid inhibitor is added in the extraction and separation process. The composite liquid inhibitor is insensitive to the acid-base property of a rare earth extraction system, and the problem that cerium (III) is oxidized into cerium (IV) by oxygen in air in a saponification-rare earth soap section high-pH environment can be effectively avoided.

The invention belongs to the technical field of extraction of scandium and diphosphonic acid extraction agents from titanium dioxide waste acid, and particularly relates to a method for extracting scandium from titanium dioxide waste acid by using a diphosphonic acid extraction agent. A scandium extraction extracting agent commonly used in titanium white waste acid generally has the problems of relatively poor selectivity, easiness in emulsification, difficulty in reverse extraction and the like. According to the method, P, P '-[(imine) bis (methylene) bis [P-alpha-hydroxyalkylphosphinic acid] is adopted as an extracting agent, trace scandium is extracted from the high-acidity titanium white waste acid, and the single extraction rate reaches 99.9%. The extraction agent is simple in synthesis method, good in stability and high in extraction capacity, and has good extraction performance on trace scandium in high-acidity and multi-impurity titanium white waste acid. The extraction agent is free of emulsification during extraction, fast in phase splitting and high in production efficiency, and compared with common phosphorus (phosphine) extraction agents, the extraction agent does not need saponification and belongs to an environment-friendly extraction agent.

The invention discloses a preparation technology of collection paper literature deacidification test paper, and belongs to the technical field of papermaking engineering. The method comprises the following steps: firstly, determining physicochemical indexes of the deacidification test paper according to ontology characteristics of precious ancient books and recent modern paper literatures, then taking saponified rosin size as an internal sizing agent, taking talcum powder as a filler, taking cationic polyacrylamide (CPAM) as a retention aid, and finally, carrying out papermaking and drying to obtain the deacidification test paper. The performance of the product prepared by the process is basically consistent with that of recent modern literature paper, the product has the capability of replacing a paper literature body to carry out lossy testing, and a more reliable, more comprehensive and more economical basis can be provided for constructing a deacidification effect evaluation system.

The invention relates to the technical field of battery recovery, in particular to a method for separating and recovering metal elements in waste ternary lithium ion battery leachate, which comprises the following steps: A) mixing an extracting agent 2-n-hexyldecanoic acid with a diluent to obtain an extracting solvent; b) mixing the extracting solvent with a saponifying agent to obtain a saponified extracting solvent; c1) mixing the waste ternary lithium ion battery leachate with the saponified extraction solvent, and carrying out single-stage extraction to obtain a raffinate water phase and a loaded organic phase; and D1) mixing the loaded organic phase with a back extraction agent, and carrying out back extraction to obtain a back extraction solution and a blank organic phase. According to the invention, the problems of complex recovery process and difficult separation of calcium and magnesium in the nickel-cobalt-manganese co-extraction process in the prior art are solved, and the recovery of nickel, cobalt and manganese can be realized through one-step selective co-extraction process; the technological process is short and the metal recovery rate is high.

The invention provides a continuous saponification device for an extracting agent. The continuous saponification device comprises a saponification kettle and a saponification clarifying tank, the upper part of the saponification kettle is communicated with the saponification clarification tank through an overflow pipeline; the bottom of the saponification kettle is communicated with the bottom of the saponification clarification tank through a water phase reflux pipeline; a stirring device is arranged in the bottom of the saponification kettle, and a plurality of extracting agent feeding pipes extending near the stirring device are arranged in the middle of the upper part of the saponification kettle; a plurality of liquid caustic soda feeding pipes extending to the vicinity of the stirring device are arranged at the upper part of the saponification kettle and around the extracting agent feeding pipe; the saponification kettle is of an external jacket type structure, the lower part of an interlayer space of the saponification kettle is communicated with a steam inlet, and the upper part of the interlayer space is communicated with a steam outlet; according to the continuous saponification device for the extraction agent and the saponification method of the continuous saponification device for the extraction agent, the saponification efficiency of the extraction agent is high, liquid caustic soda residues are low, and therefore consumption of the liquid caustic soda is correspondingly low, the production cost is low, and economic benefits are good.

The invention provides a doubling treatment method of battery black powder and nickel cobalt hydroxide. The doubling treatment method comprises the following steps: carrying out reduction roasting and water immersion treatment on the battery black powder to obtain a first lithium-containing liquid and a solid product; carrying out acid leaching on the solid product to obtain a leaching solution; after removing impurities from the leachate, extracting the leachate with a first saponification extraction agent to obtain first raffinate and a first extraction organic phase; carrying out soap conversion reaction on the first raffinate and a second saponification extraction agent to obtain a second extracted and soap-converted organic phase and a second lithium-containing liquid; carrying out acid leaching and impurity removal on nickel cobalt hydroxide, and carrying out extraction reaction on the solution and the second extraction soap-converted organic phase to obtain a second extraction organic phase and a second raffinate; the second raffinate is subjected to Co extraction, Mg extraction and evaporative crystallization, and nickel sulfate is obtained; and the organic phase obtained after Co extraction is subjected to back extraction and evaporative crystallization, and cobalt sulfate is obtained. Compared with a traditional doubling treatment technology, the doubling treatment method avoids the problem of impurity pollution caused by doubling treatment of traditional battery black powder and nickel cobalt hydroxide raw materials.

The invention relates to a synthetic method of 1, 4-butanediol diglycidyl ether, 1, 4-butanediol and epichlorohydrin are synthesized in one step under the action of a phase transfer catalyst, in the one-step process, once 1, 4-butanediol and epichlorohydrin are subjected to ring-opening reaction to produce a chlorohydrin ether intermediate, the chlorohydrin ether intermediate is subjected to ring-opening reaction, and the chlorohydrin ether intermediate is subjected to ring-opening reaction to produce the 1, 4-butanediol diglycidyl ether. The intermediate can be subjected to ring-closure production immediately under the action of solid alkali to produce an epoxy group, the obtained 1, 4-butanediol diglycidyl ether is relatively low in easily saponifiable chlorine content, and the target product is relatively high in purity. After the reaction is finished, sodium chloride generated by the reaction and unreacted solid caustic soda can be removed through direct suction filtration to obtain a neutral system, washing is not needed, no waste liquid is generated, operation is easy, and the method is suitable for clean industrial production.

The invention relates to the technical field of analytical chemistry, in particular to a method for simultaneously determining seven fat-soluble vitamin compounds. The method comprises the following steps: in 0-4.5 minutes, transferring a sample solution into an on-line solid-phase extraction column by a sample loading pump, and communicating an analysis pump with a liquid chromatographic analysis column through a switching valve for balancing; in 4.5-6.5 min, adjusting the state of a switching valve, respectively communicating two ends of the online solid-phase extraction column with an analysis column and an analysis pump of the liquid chromatography, and backflushing the analyte from the online solid-phase extraction column and transferring the analyte into the analysis column of the liquid chromatography by a mobile phase of the analysis pump; and 6.5-42 min, adjusting the state of the switching valve, flushing and balancing the on-line solid phase extraction column by the sample loading pump, and completing separation and analysis of the analyte by matching the analysis pump with the analysis column of the liquid chromatography. According to the method disclosed by the invention, saponification liquid can be directly analyzed on a machine, and seven target compounds can be separated and detected within 42 minutes.

The invention provides a method for recovering lithium from salt lake brine with a high magnesium-lithium ratio. Lithium is extracted through the working procedures of pretreatment, adsorption, desorption, solvent extraction and precipitation, a specific extraction agent is adopted for saponification, a saponified organic phase is prepared, then the saponified organic phase and a lithium-containing desorption solution are extracted, and a raffinate and a loaded organic phase are obtained respectively; carrying out reverse extraction on the loaded organic phase to respectively obtain a lithium-containing concentrated solution and a blank organic phase; and then, mixing the lithium-containing concentrated solution with a precipitant, and carrying out solid-liquid separation to obtain lithium carbonate. According to the method disclosed by the invention, a co-extractant ferric trichloride does not need to be added, so that the problems caused by the co-extractant in the prior art are avoided, and the extraction separation of lithium in a near-neutral pH range is realized; moreover, the pH value of the raffinate is in a near-neutral range (about 7-8), so that the subsequent wastewater treatment difficulty is reduced; in the reverse extraction section, lithium in a loaded organic phase is enriched into a water phase in a phase ratio regulation and control mode, and a lithium carbonate product can be prepared through direct precipitation.

The invention belongs to the technical field of analysis and detection, and discloses a method for detecting four polycyclic aromatic hydrocarbons in vegetable oil through gas chromatography-tandem mass spectrometry. According to the method, a saponification and degreasing method and dispersive liquid-liquid microextraction (DLLME) are organically combined, so that sample pretreatment is effectively simplified, and the advantages of high selectivity and stable isotope internal standard quantification of gas chromatography-tandem mass spectrometry (GC-MS / MS) are combined; a novel method for detecting four important polycyclic aromatic hydrocarbons (PAH4) including benzo (a) pyrene (BAP), benzo (a) anthracene (BAA), benzo (b) fluoranthene (BBF) and chrysene (CHR) in common edible vegetable oil is established. According to the method, the sample pretreatment is simple and rapid, the personnel environment is relatively friendly, and the detection limit and the accuracy can meet the requirements of monitoring PAH4 in common edible vegetable oil.

The invention relates to a method for extracting high-purity nervonic acid from malania oleifera oil, which comprises the following steps: 1, saponification-metal salt precipitation: taking malania oleifera oil, adding alkali, adding a non-aqueous solvent, heating, refluxing, saponifying, cooling, precipitating, filtering, and removing a solution to obtain filter residues; step 2, acidification: adding acid water into the filter residues obtained in the step 1 for acidification, standing for layering, and discarding a water layer to obtain an oil layer; 3, washing: washing the oil layer obtained in the step 2 to obtain a washed oil layer; 4, fractional precipitation: adding a first organic solvent into the washed oil layer obtained in the step 3, carrying out first-stage precipitation, and filtering to remove filter residues; and carrying out second-stage precipitation and filtration. And 5, recrystallization: adding a second organic solvent into the filter residue obtained in the step 4, recrystallizing, filtering, and taking the filter residue to obtain nervonic acid. The nervonic acid with the content not lower than 95%, the purity not lower than 98% and the yield not lower than 70% can be obtained.

The invention discloses a method for extracting cesium from salt lake brine. The method comprises the following steps: step 1, carrying out saponification reaction, and centrifugally standing for layering; step 2, adjusting the pH value of the salt lake brine, and putting the salt lake brine into a reaction container for extraction; step 3, washing until the concentration of the organic solution containing the cesium element is less than 0.01 g / L; step 4, carrying out back extraction; and 5, impurity removal is conducted on a cesium-containing reverse extraction phase obtained after reverse extraction. The method has the advantages that the salt lake brine is extracted through the saponified organic phase, the alkali liquor consumption is very small and can be recycled, meanwhile, addition of a large amount of strongly alkaline substances into the organic phase is avoided, environment pollution caused by generation of a large amount of waste alkali liquor is avoided, the production cost and the treatment cost are reduced, the treatment capacity is large, the process and equipment are simple, investment is small, and the method is suitable for industrial production. And continuous production is easy to realize.

The present invention discloses a bio-based anionic super dispersant having a structure shown in formula I or formula II. The super dispersant shown in formula I is formed by rigid terephthalate and flexible vinyl linked by ether bonds; the super dispersant shown in formula II is formed by rigid terephthalate and flexible glycerol linked by ether bonds. The preparation method of the super dispersant in the present invention is: succinylsuccinic acid dimethyl ester is oxidized to obtain 2,5-hydroxy terephthalic acid dimethyl ester, and then condensed with 1,2-dichloroethane (or epichlorohydrin) and the like to form an ether, and then the ester bond is saponified under an alkali agent to obtain. The preparation method of the super dispersant provided by the present invention is simple, has a high biochar content, a high yield, good pigment dispersion performance, and good stability of the obtained pigment paste.

The present invention relates to the mono-saponification of diesters of 2,3,5-trimethylhydroquinone by a base allowing an advantageous synthesis of esterified alpha-tocopherol. The mono-saponification has been demonstrated to occur very selectively at very high yield.

The invention relates to a green residue-reducing epoxypropane production device and method, and belongs to the field of energy-saving and environment-friendly chemical equipment. The production device disclosed by the invention not only reduces the concentration of hydrogen chloride in chlorohydrin entering a saponification system and the dosage of lime milk in saponification, but also remarkably reduces the amount of filter residues needing to be additionally treated, so that more effective cost control is realized while the production efficiency is improved and green residue reduction is promoted; the production cost of the epoxypropane is greatly reduced, and the economic advantage is remarkable.

The invention discloses a qualitative and quantitative detection method for vitamin A and vitamin E in food. The qualitative and quantitative detection method comprises the following steps: step 1, pre-treating a sample and accurately adding an isotope internal standard: adding d6-alpha-tocopheryl acetate and d8-retinol acetate into the sample before saponification and preparing a blank matrix; 2, pre-treatment parameter QbD-DOE collaborative optimization, wherein a response surface method is adopted for conducting center composite design on the saponification temperature, time and BHT concentration, and the interaction effect of all the factors is analyzed to determine an optimal operation window; step 3, intelligently optimizing chromatography-mass spectrometry conditions and tuning parameters; step 4, constructing a matrix matching calibration curve and performing WLS quantitative analysis: performing gradient dilution on a standard substance by utilizing a blank matrix extracting solution, adding an isotope internal standard to prepare a 5-7-point matrix matching calibration curve, fitting the curve by adopting a weighted least square method, and verifying the correlation and intercept change of the calibration curve every day; and 5, multi-dimensional qualitative confirmation and intelligent diagnosis system operation.

A method for treating a laterite-nickel ore feed liquid having a high calcium and magnesium content and a use. The method comprise the following steps: S1, preparing 2-hexyldecanoic acid and an HBL110 / HBL116 extractant into an extraction organic phase; S2, carrying out nickel-cobalt co-extraction on the extraction organic phase and a laterite-nickel ore feed liquid having a high calcium and magnesium content to obtain a first loaded organic phase and raffinate, wherein in the laterite-nickel ore feed liquid having a high calcium and magnesium content, the content of calcium ions is 0.5-1 g / L, the content of magnesium ions is 4-7 g / L, the content of nickel ions is 2.5-4 g / L, and the content of cobalt ions is 0.2-0.5 g / L; S3, using a washing liquid to wash the first loaded organic phase to obtain a second loaded organic phase and washing water, and enabling the washing water to flow back to the laterite-nickel ore feed liquid having a high calcium and magnesium content; S4, adding a back-extraction solution into the second loaded organic phase, and carrying out back-extraction to obtain a nickel-cobalt salt solution and an organic phase having undergone back-extraction; and S5, carrying out saponification on the organic phase having undergone back-extraction to obtain a regenerated extraction organic phase. The present solution is applied to a high calcium and magnesium environment, and calcium and magnesium can be prevented from forming a third phase, thereby achieving a good effect of separating and purifying nickel-cobalt.

To provide coated paper that retains desirable hot water resistance and includes a PHBH-coated layer hard to swell and soften by water.SOLUTION: Coated paper includes at least on one surface of a paper base material thereof: an under coated layer including PHBH (poly (3-hydroxybutyrate-co-3-hydroxyhexanoate)), inorganic pigments and an adhesive; and a top coated layer including PHBH, where the adhesive includes polyvinyl alcohol-based resin having a saponification degree of 90% or higher, and Cobb water absorbency to 90°C hot water after 30 minutes of a contact time is 25 g / m2 or less.SELECTED DRAWING: None

The application discloses an extraction method of functional fatty acid, which comprises the following steps: dissolving lanolin in an alcohol aqueous solution, adding an excess of strong alkali, and heating to perform saponification to obtain a saponification solution; adjusting the pH of the saponification solution to neutral or weak alkaline by using a strong acid aqueous solution; adding a calcium chloride alcohol aqueous solution to the saponification solution to obtain a calcium fatty acid precipitate, and washing the precipitate with an alcohol aqueous solution; taking the calcium fatty acid precipitate, adding water, and adjusting the pH to strong acidity, and performing acidification under the condition of ultrasonic heating; adding an extraction solvent to perform extraction and separation, removing the water phase, reserving the organic phase, removing the extraction solvent by rotary evaporation, and obtaining the functional fatty acid. The application uses an ultrasonic acidification method to improve the technology of extracting functional fatty acid in lanolin by calcium precipitation, significantly solves the problem of calcium fatty acid acidification difficulty in lanolin, greatly improves the yield and purity of the functional fatty acid, and shortens the production time of the functional fatty acid.