97results about How to "Light color" patented technology

The invention relates to a compound enzyme for efficiently converting high-purity rare ginsenoside CK as well as a preparation method and application of the compound enzyme, and belongs to the technical field of microorganisms. The compound enzyme disclosed by the invention comprises beta-glucosidase, fructosyl transferase, lactase, cellulase and beta-glucanase. The beta-glucosidase, the fructosyl transferase, the lactase, the cellulase and the beta-glucanase are selected and matched to obtain the compound enzyme, the ginsenoside CK can be prepared in an enzyme engineering process, and the compound enzyme has the effect of improving the conversion rate of converting the ginsenoside Rb1 into the ginsenoside CK through synergistic interaction.

The present invention provides an application of a type of inorganic material in the preparation of a color-changeable polymer material, and also provides a color-changeable polymer material prepared based on the type of inorganic material and a preparation method thereof, which belongs to the field of polymer laser processing technology. The inorganic material described in the present invention is an inorganic compound containing tungsten and / or molybdenum. The present invention prepares a color-changeable polymer material after adding a specific inorganic material as an additive to a polymer. Under the action of laser, the polymer material has an excellent color-change effect, and various color marks can be formed on the polymer material. The obtained color marks are clear and flat with high contrast. At the same time, the polymer material is light in color, and color marking can be achieved on a light-colored substrate, thereby expanding the scope of application. In addition, the preparation method of the color-changeable polymer material of the present invention is simple, easy to operate, safe, environmentally friendly, and very suitable for industrial applications.

The present invention provides the use of organic materials in the preparation of color-changeable polymer materials, and also provides color-changeable polymer materials prepared based on such organic materials and a preparation method thereof, belonging to the technical field of polymer laser processing. The present invention adds a specific organic material as an additive to a polymer to obtain a color-changeable polymer material, and the polymer material has an excellent color-change effect. Under the action of a laser, various color marks can be formed on the polymer material, and the obtained color marks are clear and flat with high contrast. At the same time, the polymer material is light in color, and color marks on light-colored, white or transparent polymer substrates can be realized, expanding the application range of laser color marks. In addition, the amount of organic material used in the color-changeable polymer material of the present invention is small, and the preparation method is simple, easy to operate, safe, and low in energy consumption, which is very suitable for large-scale industrial production.

The invention provides a method for efficiently extracting light-color lignin and application. The method comprises the steps that bamboo is smashed, bamboo powder is screened out and dried, then formic acid is used for pretreatment and filtration to obtain solid residues, deionized water is used for washing the solid residues to be neutral, and solid matter is obtained after drying; treating the solid substance by using a tetrahydrofurfuryl alcohol / p-toluenesulfonic acid aqueous solution system, filtering out insoluble impurities to obtain filtrate, washing the insoluble impurities by using a tetrahydrofurfuryl alcohol aqueous solution and deionized water until the insoluble impurities are neutral, and reserving a washing solution; and adding water into the filtrate and the washing liquid for precipitation to obtain light-color lignin. According to the method for extracting the lignin, the yield is 66.9%, the purity is 99.64%, the obtained lignin is light in color (lightness: 70.48), the molecular weight of the obtained lignin is moderate (Mw: 4695), and the negative influence of the extraction process on lignin structural units is limited.

The invention belongs to the technical field of food biology, and particularly relates to an antioxidant peptide derived from cantharellus cibarius sporocarp, an antioxidant peptide detection reagent and application, and the amino acid sequence of the antioxidant peptide is at least one of FPYPY, YPPYF, YYPF and MPWY. The antioxidant peptide provided by the invention is derived from chanterelle, is an enzymolysis product of chanterelle protein, and is derived from edible and medicinal fungus chanterelle, so that the antioxidant peptide is small in toxic and side effects and high in safety. Meanwhile, the antioxidant peptide disclosed by the invention has good biological activity and a relatively strong antioxidant effect, can remarkably scavenge free radicals, and can be applied to repair damage caused by oxidative stress.

The invention belongs to the technical field of organic compounds, and discloses a preparation method of butynediol diethoxy ether and butynediol polyethoxy ether. The preparation method of the butynediol polyethyoxyl ether comprises the following steps: mixing 1, 4-butynediol and a basic catalyst, then adding first ethylene oxide to carry out a first polymerization reaction, and after the reaction is finished, carrying out post-treatment to prepare butynediol diethyoxyl ether; and mixing the butynediol diethoxy ether with second ethylene oxide and a phosphazene salt catalyst, and carrying out a second polymerization reaction to prepare the butynediol polyethoxy ether. The butynediol diethoxy ether prepared by the method is light in color and narrow in molecular weight distribution. The polyethyoxyl butynediol with light color, narrow molecular weight distribution, low peroxide value and small 1, 4-butynediol residual quantity can be prepared by using the polyethyoxyl butynediol as a catalyst of a second polymerization reaction and using phosphazene salt as a catalyst of the second polymerization reaction by using the polyethyoxyl butynediol polyethyoxyl butynediol polyethyoxyl butynediol polyethyoxyl butynediol polyethyoxyl butynediol polyethyoxyl butynediol polyethyoxyl butynediol.

The invention provides an impurity removal device for a clear-pond tea saponin concentrated solution, which comprises a device support column and a device shell fixedly mounted at the top of the device support column, a liquid inlet column is arranged in the device shell, a liquid inlet is formed in the upper end of the liquid inlet column, a liquid storage box is fixedly mounted on the inner side of the device support column, and a liquid outlet is formed in the lower end of the liquid storage box. A liquid filtering device is fixedly installed at the center of the top of the liquid storage box, the bottom of the liquid inlet column is located at the center of the liquid filtering device, a filter screen disc is arranged in the liquid filtering device, and a transverse liquid distributing pipe and a longitudinal liquid distributing pipe are arranged at the top of the filter screen disc. Through the synergistic effect of the designed liquid inlet column, the filtrate device, the filter screen disc and the filter agent caulking groove, uniform permeation of the tea saponin concentrated solution in the filter agent is realized, and biological polysaccharide is effectively adsorbed and filtered by the composite filter agent, so that the proportion of pentacyclic triterpenoid saponin in the concentrated solution is remarkably increased. The desugared concentrated solution is light in color, so that higher efficiency is shown when wild trash fishes are removed in shrimp and crab culture.

The invention belongs to the field of silane-modified adhesives, and relates to a high-strength and high-toughness silane-modified sealant and a preparation method, wherein the sealant comprises components by weight: 10-40 parts of silane-modified resin; 30-70 parts of nano-calcium carbonate; 0.1-2 parts of surface modifier; 1-20 parts of plasticizer; 0.1-2 parts of UV-resistant aging agent; 0.1-2 parts of antioxidant; 0.5-10 parts of reinforcing and toughening agent; 1-10 parts of water-removing agent; 1-15 parts of coupling agent; 0.01-5 parts of catalyst; and the surface treatment agent is an aluminate treatment agent. The present invention improves the compatibility of inorganic powder and silane-modified resin, increases the filling amount of inorganic filler, and retains the good mechanical properties of the material through a homemade surface treatment agent; adds a reinforcing and toughening agent containing a reactive group, improves the plasticity of the sealant before the reaction, and after participating in the reaction, free migration will not occur, improves the strength and flexibility of the glue, increases the elongation, and improves the bonding performance with a variety of substrates.

The invention belongs to the field of preparation of dental restoration materials, and particularly relates to a betulinol-based dendritic organic monomer, composite resin and a preparation method. The invention provides the betulin-based dendritic organic monomer which is mild in reaction condition, light in product color and good in mixing effect with a resin matrix. The invention further provides composite resin which is prepared from the organic monomer and shows remarkable biocompatibility and low polymerization shrinkage. The invention also provides a preparation method of the composite resin.

The invention discloses a biodegradable film with high light transmittance and efficient ultraviolet shielding as well as a preparation method and application of the biodegradable film. The invention provides a biodegradable film with high light transmittance and efficient ultraviolet shielding. The biodegradable film comprises a bio-based degradable film and lignin-tannin composite nanoparticles located in the bio-based degradable film. According to the biodegradable film with high light transmittance and efficient ultraviolet shielding, the structural characteristics of the lignin and the tannin are fully utilized, and the ultraviolet shielding performance can be remarkably enhanced through composite particles generated through self-assembly of the lignin and the tannin, pi-pi accumulation of benzene rings in the lignin structure and rich phenolic hydroxyl groups in the tannin structure. In addition, the color of tannin is lighter than that of lignin, and the film color can be obviously reduced. Therefore, the biodegradable film with high transparency and efficient ultraviolet shielding effect can be prepared under the condition of low additive amount.

The present invention relates to a separation device for a dichloromethane and white oil mixed liquid, comprising a distillation system, a white oil treatment system, and a dichloromethane treatment system, wherein the distillation system comprises a distillation tower, an evaporator, and a gas-liquid separator; the white oil treatment system comprises an oil rectifying device, a white oil cooler, and a white oil collector; and the dichloromethane treatment system comprises a dichloromethane condenser, a water separator, and a dichloromethane collector. The present invention adopts a falling film evaporator, the material residence time is short, the steam working pressure is small, and the steam consumption is low. At the same time, the temperature of the evaporated white oil concentrate is low, the color is light, and the purity is high. After the evaporated dichloromethane gas is subjected to gas-liquid separation, condensation, and water separation, the white oil content in the dichloromethane is within 20ppm. After the white oil is rectified and cooled, the dichloromethane content in the finished white oil is within 80ppm. In addition, the structure is simple and the implementation is convenient.

The invention relates to an ultraviolet absorber and an application thereof. The ultraviolet light absorber comprises a compound with a structure as shown in a formula (I) or a formula (II), in the formula (I) and the formula (II), R1 is selected from C1-C20 straight-chain or branched-chain alkyl groups, R2 is selected from C1-C8 straight-chain or branched-chain alkyl groups, and n is selected from an integer from 1 to 3. # imgabs0 #

The invention discloses a method for improving the yield of hydration reaction of myrcene or dihydromyrcene and a synthetic fragrance, belonging to the technical field of deep processing of forest chemical products. The method comprises steps of synthesis reaction, catalyst recovery, solvent recovery, product neutralization, product fractionation, etc. The invention adopts a composite catalyst composed of one or more of zirconium sulfate, titanium sulfate, α-hydroxy acid and divalent copper salt to catalyze the hydration reaction of myrcene or dihydromyrcene, thereby improving the yield of hydration products and reducing side reactions and energy consumption.

The invention relates to a preparation method of 3, 4-difluorobenzene. The invention relates to a preparation method and equipment of 3, 3 '-diethyl-4, 4'-diaminodiphenylmethane, o-ethylaniline, hydrochloric acid and water pass through a first static mixer to form hydrochloride of o-ethylaniline, the hydrochloride of o-ethylaniline and a formaldehyde solution are condensed in a second static mixer, and then high-temperature rearrangement, alkali neutralization, water washing, dehydration, free amine removal and filtration are performed to obtain the 3, 3 '-diethyl-4, 4'-diaminodiphenylmethane. The purity of the 3, 3 '-diethyl-4, 4'-diaminodiphenylmethane prepared by the process is about 95%, the polymer content is 4%-5%, the free amine content is lower than 0.2%, the appearance of the 3, 3 '-diethyl-4, 4'-diaminodiphenylmethane is transparent yellow, and the viscosity of the 3, 3 '-diethyl-4, 4'-diaminodiphenylmethane is 1400-2000cps.

This invention discloses a low-temperature desolventizing machine and its usage method, relating to the field of grain and oil deep processing technology. The low-temperature desolventizing machine includes a machine body and a steam-water integrated utilization device. The machine body includes a cylinder and a rotating mechanism. The cylinder includes a front end cover and a rear end cover located at its front and rear ends. The cylinder also includes an inner cylinder, which is equipped with a feed inlet, a front settling tank, a solvent gas inlet, a rear settling tank, and a discharge outlet. An outer jacket is provided outside the inner cylinder, comprising an annular jacket and multiple flow-guiding jackets. The steam-water integrated utilization device is connected to the flow-guiding jackets and the annular jacket via pipelines and can provide hot water circulation and flash steam heating to the inner cylinder. This invention uses hot water and flash steam instead of steam heating, changing the traditional A-cylinder / B-cylinder desolventizing method, and solving the problems of high residual solvent content, low nitrogen solubility index, dark color, high powder content, and large moisture loss in low-temperature meal, greatly reducing solvent and steam consumption.

This invention relates to the field of organic compound preparation technology, specifically a method for preparing 11-triglycerides of carbonate via low-temperature acylation. This method uses glycerol and undecanoyl chloride as raw materials, employing a synergistic system of a "composite acid-binding agent + Lewis acid catalyst," and combines in-situ dehydration technology and a stepwise heating strategy in a dual-solvent environment to achieve efficient synthesis. The specific steps include: under nitrogen protection, dissolving glycerol in a dichloromethane-toluene dual solvent, adding a composite acid-binding agent of pyridine and N,N-diisopropylethylamine, anhydrous zinc chloride catalyst, and 4A molecular sieve for in-situ dehydration; dropwise adding undecanoyl chloride at a low temperature of 5-10°C, followed by sequential heating to 30°C for 2-3 hours and then reacting at 50°C for 12-16 hours; and post-processing using a combined process of filtration-multi-stage extraction-membrane separation-column chromatography. This invention provides mild reaction conditions, effectively suppresses side reactions, produces high-purity products, increases molar yield, and reduces solvent toxicity and purification costs.

The invention relates to the technical field of polyester resin, and discloses a preparation process of tin-free environment-friendly polyester resin, which is characterized in that dihydric alcohol, dibasic acid, a catalyst, an antioxidant, an acidolysis agent, a curing accelerator and the like are reacted to obtain the tin-free environment-friendly polyester resin. According to the invention, bismuth iso-octoate and 4-dimethylaminopyridine form a compound catalyst to replace a traditional organic tin catalyst, so that the tin-free environment-friendly polyester resin is obtained, and the blank of the tin-free environment-friendly polyester resin is filled. The toxic and side effects are effectively reduced, the environmental pollution is reduced, and the requirements of environment-friendly polyester resin are met. Meanwhile, tris (2-hydroxyethyl) benzene-1, 3, 5-triformate is added to participate in esterification polycondensation reaction, contains a plurality of hydroxyl crosslinking polymerization sites and a heat-resistant benzene ring structure, and is crosslinked into polyester resin molecules, so that the glass-transition temperature, the heat stability and the biodegradability of the resin can be improved.

The invention discloses a preparation method of light-color disproportionated rosin potassium soap, which comprises the following steps: (1) adding an organic solvent into gum rosin, melting and distilling to remove turpentine in the gum rosin to obtain refined rosin; (2) under the protection of inert gas, adding a catalyst into the refined rosin obtained in the step (1), carrying out disproportionation reaction, and then adding an antioxidant to obtain disproportionated rosin; (3) continuously adding small molecule alcohol into the disproportionated rosin obtained in the step (2), carrying out saponification reaction in the presence of alkali, cooling to room temperature after the reaction is finished, adding a free radical scavenger, stirring, and then discharging to obtain the disproportionated rosin potassium soap with uniform light color; and inert gas replacement protection is carried out before saponification. The process is simple and low in cost, and the prepared product is light in color and luster, free of color reversion, free of gel and low in cloud point under the condition that safe production is guaranteed.

The invention discloses a method for preparing a low-sodium-sulfate-content, low-chroma and high-performance naphthalene sulfonic acid formaldehyde condensate, which comprises the following steps: carrying out sulfonation reaction on naphthalene and concentrated sulfuric acid at 155-165 DEG C, adding benzene, methylbenzene, xylene or a mixture of two or three of benzene, methylbenzene and xylene into a reactor, forming azeotrope steam from water generated by the reaction and benzene or methylbenzene, and reacting to obtain the low-sodium-sulfate-content, low-chroma and high-performance naphthalene sulfonic acid formaldehyde condensate. Steam is condensed and then flows into an oil-water separator to be layered, water is discharged through a piston at the bottom end of the oil-water separator, the sulfonation degree is evaluated according to the quality of the discharged water, when the discharged water amount reaches 5 / 32 of the mass of naphthalene, it is proved that sulfonation reaction is completed, excessive solvent is evaporated out, the temperature is reduced to 110-120 DEG C, water with the mass ratio of naphthalene to water being (0-9): 128 is added for hydrolysis, the temperature is reduced to 100-120 DEG C, and the sulfonation degree is evaluated according to the quality of the discharged water. The mass ratio of the formaldehyde to the naphthalene is 83: 128-87.5: 128, the mass ratio of the formaldehyde to the naphthalene is 83: 128-87.5: 128, the polymerization reaction is carried out for 4-8 hours, the mass ratio of the water to the naphthalene is 9: 32-45: 64, the viscosity of the system is reduced, after full reaction, a sodium hydroxide solution is used for neutralization, and the product is obtained.

The invention provides an idebenone derivative and a preparation method and application thereof, the idebenone derivative has an uronic acid structure, the water solubility of idebenone can be improved, the first-pass effect of idebenone is reduced, and more and more effective medicine schemes are provided for treating mitochondrial dysfunction and neurodegenerative diseases. Meanwhile, the idebenone derivative has better stability in air and lighter color, the use and storage conditions of idebenone can be reduced, and the application scene of idebenone in the fields of cosmetics and the like is greatly widened; moreover, the preparation method of the idebenone derivative is simple, conditions are mild, and the idebenone derivative has a good application prospect.

A bio-based degradable multi-block copolyester elastomer and a preparation method thereof, comprising the steps of mixing 2,5-furandicarboxylic acid dimethyl ester, dimer acid dimethyl ester and a small molecule diol, stirring and heating to carry out an ester exchange reaction to obtain furandicarboxylic acid dihydroxyalkyl ester and dimer acid dihydroxyalkyl ester; carrying out a second-step ester exchange reaction of the furandicarboxylic acid dihydroxyalkyl ester and dimer acid dihydroxyalkyl ester mixture with 2,5-furandicarboxylic acid dimethyl ester to obtain a low molecular weight polyester prepolymer; and polycondensing the obtained low molecular weight polyester prepolymer under the action of catalyst B. The preparation method of the invention has the advantages of low energy consumption, few side reactions, light product color, adjustable performance, and the like, and is conducive to industrial application.

The invention discloses a method for airing yellowish-brown eggplant coats, and belongs to the technical field of tobacco processing. The air-curing method comprises the following steps: S1, placing mature tobacco leaf weaving rods in different air-curing areas in a standard air-curing room, arranging red light and blue light sources at the bottoms of mature tobacco leaves in the different air-curing areas, and then air-curing the mature tobacco leaves; s2, starting from the 3th-5th day after airing, turning on a red light source and a blue light source every day to supplement light, and stopping light supplement until the 20th-30th day after airing; continuously airing, and obtaining a yellowish-brown eggplant coat after the airing is finished; wherein in the step S2, the light intensity of the red light source is 2.5-7.5 mw / m < 2 > / nm, and the light intensity of the blue light source is 20-60 mw / m < 2 > / nm. The combined light sources with different intensities and light qualities are used for supplementing light in the airing process of the eggplant coating, so that the color of the eggplant coating is obviously lightened and is in typical yellowish brown, and the quality of the eggplant coating is obviously improved.

The invention provides antibacterial and insect-proof silk paper for calligraphy and painting and a preparation method of the antibacterial and insect-proof silk paper, and relates to the technical field of papermaking. Comprising the following steps: S1, putting flat silk into warm water, adding lauryl sodium sulfate, urea and Ca (ClO) 2, preserving heat, standing and stirring; then adding NaOH, standing and rubbing, then fishing out the flat silk, soaking and cleaning with water, spreading and drying; s2, soaking the dried flat silk in an antibacterial insect-resistant solution, fishing out and airing, repeatedly soaking and airing for 2-3 times, paving, and drying; s3, soaking the flat silk dried in the step S2 in a whitening and softening solution, and then fishing out, flatly laying and drying; and then spraying antibacterial nanocapsules on one or two surfaces of the silk paper, and drying to obtain the silk paper. The silk paper prepared by the method is high in white cleanliness and beneficial to storage, and has antibacterial and corrosion-resistant properties.

The invention discloses a catalyst and a preparation method thereof, and a system and a method for continuously preparing methylhexahydrophthalic anhydride, and belongs to the technical field of methylhexahydrophthalic anhydride preparation. The catalyst has a double-layer structure, the outer layer is a stainless steel hollow structure, and the inner layer is a Raney nickel-cobalt metal structure. The catalyst not only has high activity and high hydrogenation efficiency of a Raney nickel catalyst, but also has the advantages of high strength, long service life, strong stability and the like, and can be used for preparing methylhexahydrophthalic anhydride. Besides, according to the system for continuously preparing methylhexahydrophthalic anhydride provided by the invention, the hydrogenation process is divided into two sections, and the catalyst is used for the second-section hydrogenation process, so that higher hydrogenation efficiency, shorter hydrogenation residence time and higher production efficiency can be obtained in this way, the saturation degree of a hydrogenation product is high, and the yield of the product is increased. The method has the advantages of low iodine value, light color number, high purity, higher yield, few byproducts and the like.

The application discloses a preparation method of concave-convex texture ceramic tiles with uniform color and luster, and comprises the following steps: A, blank is pressed into a blank body by roller forming, and the blank body layer is obtained after first drying; B, printing ink of a mold is printed according to a preset pattern, digital face glaze is sprayed, and the concave-convex texture layer is formed after second drying; C, color ink is printed according to the preset pattern, and the inkjet printing layer is formed; D, digital protection glaze is sprayed, and the protection glaze layer is formed after third drying and fourth drying; E, kiln firing is performed, and the concave-convex texture ceramic tiles with uniform color and luster are obtained after polishing. The preparation method of the concave-convex texture ceramic tiles with uniform color and luster is simple in steps and high in operability, and under the premise of solving the black edge problem and ensuring the uniform color and luster of the ceramic tiles, the concave-convex texture effect with clear texture, high consistency and high fidelity is obtained on the surface of the ceramic tiles.

The invention discloses a sulfone polymer and a preparation method thereof, and belongs to the technical field of polymer material preparation. In the preparation method of the sulfone polymer provided by the invention, a nucleating agent with a specific particle size range is added at a suitable rate at a specific reaction stage in the reaction process of preparing the sulfone polymer, and the Na salt generated by the reaction adheres to the surface of the nucleating agent, so that the particle size of the byproduct salt generated by the reaction is increased, the proportion of the Na salt dispersed in the polymerization reaction system is reduced, the nucleophilic substitution reaction proceeds in a positive direction, the polymerization reaction is more complete, the thermal stability of the resin is improved, and the color is lighter.

The invention belongs to the technical field of epoxy resin production, and particularly relates to a preparation method and application of low-chlorine epoxy resin. The method comprises the following steps: carrying out n times of dechlorination on an epoxy resin organic phase solution, and standing and layering the obtained final dechlorination solution to obtain a final dechlorination organic phase solution; and adjusting the pH value of the final dechlorination organic phase solution to 6-7, and removing the solvent from the obtained neutralized dechlorination organic phase solution to obtain the low-chlorine epoxy resin. According to the method, potassium hydroxide is adopted as an active component of the dechlorination reagent, meanwhile, the dosage of potassium hydroxide is controlled, the dechlorination temperature is larger than or equal to 80 DEG C, potassium hydroxide is used for rapid reaction dechlorination under the action of the phase transfer catalyst, and chloride ions in epoxy resin can be effectively removed. According to the method, the total chlorine content in the low-chlorine epoxy resin product can be effectively controlled through multiple times of chlorine removal operation, controllable adjustment of product indexes is achieved, it is guaranteed that the finally obtained product is good in batch stability, light in color and luster and low in total chlorine content, and the application requirement of photoresist can be met.

The application discloses a kind of high light-transmitting high-efficiency shielding ultraviolet biodegradable film and its preparation method and application.The high light-transmitting high-efficiency shielding ultraviolet biodegradable film provided by the application includes: biobased degradable film and lignin-tannin composite nanoparticles located in biobased degradable film.The high light-transmitting high-efficiency shielding ultraviolet biodegradable film provided by the application makes full use of the structural characteristics of lignin and tannin, and the composite particles generated by self-assembly of lignin and tannin, the π-π stacking of benzene ring in lignin structure and the rich phenolic hydroxyl in tannin structure can significantly enhance the ultraviolet shielding performance.In addition, tannin is lighter than lignin, which can significantly reduce the color of the film.Therefore, a biodegradable film with high transparency and high-efficiency ultraviolet shielding effect can be prepared at low addition amount.

The invention relates to a method for producing aldol esters of formula (I), characterized in that at least one carboxylic acid anhydride of formula (II) and at least one aldol of formula (III) are reacted by heating in the presence of a basic catalyst having a pKa value of the conjugated acid of at least 8, and to the reaction product obtained by said method. The method according to the invention enables the achievement of a reaction product which is light in color, low in odor and has a high content of aldol esters of formula (I), which can be used as a blocking agent for primary amines without a strenuous purification step, in particular without overhead distillation of aldol esters. The blocked amines thus obtained together with isocyanate-containing polymers are storage-stable over a long period of time, cure quickly and process-safely upon contact with moisture, and form high mechanical quality and durable elastomers.

The invention belongs to the technical field of forest chemical industry and natural medicine extraction and separation, and discloses a superheated steam distillation extraction and separation method for magnolol and honokiol in mangnolia officinalis oil. The method comprises the following steps: carrying out superheated steam distillation processing on the cortex magnoliae officinalis oil by taking superheated steam with normal pressure or a pressure of less than 0.2 MPa as a desorption medium, carrying out condensation cooling and oil-water separation on distilled oil-water mixed gas, and carrying out classified collection on fractions according to different boiling ranges, densities or aggregation forms, so as to obtain the cortex magnoliae officinalis oil. The density of the oily liquid light fraction is smaller than that of water, and the density of the viscous oily heavy fraction is larger than that of water; and carrying out centrifugal filtration on the heavy fraction, separating to obtain a white or faint yellow crystalline solid magnolol product with the purity of more than 85%, treating the filtrate by an organic solvent precipitation crystallization method, and separating to obtain a white crystalline solid honokiol product with the purity of more than 85%. The method is low in equipment investment, simple and feasible in process, low in production cost and high in industrialization popularization and application feasibility, and the magnolol and honokiol obtained through separation are light in color and high in purity.