42 results about "Free phenol" patented technology

The invention provides a fruit juice fermentation inoculant, fermented guava juice and a preparation method, and belongs to the technical field of fermented beverages. The invention provides a compound fermentation inoculant capable of fermenting fruit juice, the compound fermentation inoculant is composed of lactobacillus plantarum and lactobacillus fermentum, the fermentation inoculant is applied to fermentation of guava fruit juice, beta-glucosidase secreted in the fermentation process can hydrolyze combined polyphenol substances in guavas, and then the guava fruit juice is fermented. The antioxidant is converted into high-activity antioxidants such as quercetin and gallic acid in a free state, so that the content of free phenol is increased by about 2 times, and the scavenging rate of DPPH free radicals is increased by more than 40%. The fermentation is carried out in an oxygen-free environment, the retention rate of vitamin C can reach 80% or above, the low pH value at the fermentation end point and organic acid jointly inhibit pathogenic microorganisms, and the product stability is guaranteed. Therefore, the guava juice prepared from the compound fermentation inoculant maximally releases the natural nutritional potential of guavas.

The invention discloses a preparation method and application of an organic silicon modified novel phenolic resin fiber reinforced flame-retardant plate, and relates to the technical field of cable fireproof flame-retardant partition plates. Organic silicon oligomer and low-free-phenol hydroxymethylated phenolic resin are blended to prepare organic silicon modified novel phenolic resin, the resin is dissolved in a solvent to prepare steeping liquor, fiber cloth is steeped, and the fiber reinforced flame-retardant partition plate is prepared through a hot pressing process. The novel phenolic resin provided by the invention is low-free-phenol phenolic resin, and the prepared fiber-reinforced partition plate is a halogen-free flame-retardant plate and has excellent flame retardance and mechanical properties, so that the novel phenolic resin has a wide application prospect.

The present invention relates to a standardized plant extract of biomass from an in vitro culture of Brassica granatum, containing biologically active compounds and their primary and secondary metabolites, comprising, in% by weight: 4.0 to 6.0 organic acids, 0.5 to 1.5 fatty acids, 8.0 to 12.0 amino acids, 0.5 to 1.0 sterols, 3.0 to 6.0 free phenols, 45 to 55 sugars and 25.0 to 35.0 polyphenols, wherein the content of major mannose glycosides in the polyphenol fraction is 70-96%, making up 18%-35% of the total extract, and to compositions containing the standardized extract and glycerol and to methods for preparing standardized plant extracts. According to the method of the invention, along with the optimally selected steps, specific conditions, parameters such as temperature, duration, agitation, light, growth factors and the like, maximum volume productivity of the target substance and mannoside and stable productivity of in vitro plant cultures are achieved, and the method is a reliable and effective 24 / 7 continuous system for the production of NP.

The invention refers to standardized plant extract from biomass of in vitro cultures of Haberlea rhodopensis Friv. (HR), containing bioactive compounds and their primary secondary metabolites, containing in weight %, as follows: organic acid from 4.0 to 6.0, fatty acids from 0.5 to 1.5, amino acids from 8.0 to 12.0, sterols from 0.5 to 1.0, free phenols from 3.0 to 6.0, sugars from 45 to 55, and polyphenols from 25.0 to 35.0, with a predominant myconoside content of 70% to 96% in the polyphenolic fraction, constituting 18% to 35% of the total extract, and to a composition containing the standardized extract and glycerol as well as to a method for the preparation of a standardized plant extract.The method according this invention, along with its optimally chosen steps, specific conditions, parameters such as temperature, duration, stirring, light, growth factors, etc. achieves both maximum volumetric productivity of the target substances and myconoside, as well as stable productivity of the plant in vitro cultures and is a reliable efficient 24 / 7 continuous system for production of NPs.Dependence on natural factors, limited availability and protection of HR rare wild plant populations are eliminated. The limitations posed by seasonality and slow HR growth are also avoided by developing a renewable, ecologically method. The developed method provides alternative, renewable and sustainable sources of raw plant material necessary to obtain the target extract. The resulting extract standardized in myconoside is especially valuable with its protective action on human health and can successfully be used with its pharmacological, cosmetic effects as well as in functional foods.

The invention discloses a self-adaptive springback polyurethane sound insulation earplug with low oppression sense and belongs to the technical field of polyurethane, the polyurethane sound insulation earplug is of a bullet-shaped or bell-shaped structure and comprises a front section and a rear section from the top end to the bottom in the axial direction, the front section is made of self-adaptive springback antibacterial modified polyurethane, and the rear section is made of self-adaptive springback antibacterial modified polyurethane. The rear section is high-density hydrophobic modified polyurethane, and the front section layer adopts a disulfide bond-containing polyether polyol and resveratrol modified system, so that the synergism of antibiosis, antioxidation and self-adaptive resilience is realized; the rear section layer is made of high-density hydrophobic polyurethane, and supporting and stain-resistant functions are provided. The two layers form an integrated structure through in-situ chemical bonding, mild alkali treatment is performed for deprotection after molding, free phenolic hydroxyl groups of resveratrol are recovered, and lasting antibacterial activity is endowed.

The invention provides high-purity low-free-phenol electronic-grade phenolic resin and a preparation method thereof, and belongs to the technical field of high polymer material preparation. The raw materials comprise phenol, formaldehyde, oxalic acid, epoxy resin, a reinforcing agent and distilled water, and the raw materials are mixed according to a specific weight ratio. The preparation method comprises the steps of raw material mixing and normal-pressure reflux reaction, standing water separation and washing detection, vacuum dehydration, additive mixing and cooling molding, and by controlling process parameters such as temperature, time and vacuum degree of each step, the prepared electronic-grade phenolic resin has the solid content of 66%-69%, the free phenol content of less than or equal to 1% and the conductivity of less than 50 microseconds / cm. According to the invention, the problems of low purity, high free phenol monomer content and high impurity content of the existing electronic grade phenolic resin are solved, the prepared electronic grade phenolic resin has excellent high temperature resistance and insulation performance and low free phenol content, the pollution to the environment can be effectively reduced, and the requirement of the electronic industry on the high-purity phenolic resin is met.

The invention provides a novel lubricating oil detergent, a preparation method thereof and a lubricating oil composition. The preparation method comprises the following steps: mixing alkylphenol, base oil, a vulcanizing agent and a first part of calcium source, adding a first part of accelerant, and carrying out vulcanization reaction; then adding cyclic anhydride to carry out esterification reaction; and adding a second part of accelerant and a second part of calcium source, then carrying out carbonation reaction, and purifying the product after the reaction is finished to obtain the novel lubricating oil detergent. Wherein the cyclic anhydride is selected from one or a combination of more than two of maleic anhydride, succinic anhydride, adipic anhydride and phthalic anhydride; the addition amount of the cyclic anhydride is 0.01-0.25 part by weight based on 1 part by weight of alkylphenol. The cyclic anhydride participates in the reaction, so that the content of free phenol in the product can be reduced, and the wear resistance of the product can be improved. The novel lubricating oil detergent provided by the invention has no free phenol residue, and has more excellent detergency, oxidation resistance, wear resistance and the like.

Provided is a lubricating oil composition, including: a vegetable oil (A); a zinc dithiophosphate (B); and an amine-based antioxidant (C), wherein a total content of linoleic acid and linolenic acid among constituent fatty acids of the vegetable oil (A) is less than 20 mass % with respect to a total amount of the constituent fatty acids in the vegetable oil (A), wherein a content of the amine-based antioxidant (C) is 2.00 mass % or more with respect to a total amount of the lubricating oil composition, and wherein when the lubricating oil composition further includes a phosphorus-free phenol-based antioxidant (D), a content of the phosphorus-free phenol-based antioxidant (D) is less than 2.00 mass % with respect to the total amount of the lubricating oil composition.

The present application belongs to the technical field of slag wool, and particularly relates to a method for preparing slag wool from secondary aluminum ash and fly ash resources. The present application directly uses hot molten slag to prepare slag wool, realizes the recovery and utilization of the sensible heat of the hot molten slag, reduces the instability of the melt caused by the carbon dioxide generated by the introduction of carbonates, and improves the quality of the slag wool fiber prepared by the injection process. By using fly ash and secondary aluminum ash for partial conditioning, the fly ash and secondary aluminum ash contain high alumina and silica contents, can replace part of the substances for conditioning, and reduce the production cost. By adding kaempferol instead of part of the phenol, the degree of polycondensation reaction of phenol and aldehyde is slowed down, the resin gel time is shortened, and the free phenol content is reduced. As a coupling agent, boric acid has good bonding performance, high-temperature resistance, can reduce the water absorption of slag wool, improve the service life of slag wool, and the prepared slag wool product has excellent thermal insulation and hydrophobic properties.

The present invention relates to myconoside-containing extracts obtained from in vitro systems of plants belonging to the genera Haberlea and Ramonda, including Haberlea rhodopensis Friv, Ramonda heldreichii (Boiss.) C.B. Clarke, Ramonda myconi (L.) Rchb., Ramonda nathaliae Pancic & Petrovic, and Ramonda serbica Pancic, as well as hybrids thereof, belonging to the family Gesneriaceae, and to methods for their preparation. Furthermore, the present invention relates to the use of said extracts as chemoprotective, radioprotective, and UV-protective agents in human and veterinary medicine, dietary supplements, and cosmetics. The described in vitro plant extracts contain two fractions, Extract 1, a polyphenol fraction containing primarily flavone C-glycosides and phenylethanoids (PHEs), and Extract 2, a fraction containing primarily phenylethanoid myconosides, particularly myconosides and pauciflosides, either alone or in combination. Extract 1 contains 0.1-55.0 wt% PHEs, with free phenols, sugars, organic acids, fatty acids, amino acids, and sterols accounting for up to 100 wt%. Extract 2 contains 55.0-99.9 wt% PHEs (particularly myconosides and pauciflosides), with phenolic compounds, monosaccharides, disaccharides, or their residues accounting for up to 100 wt%. Extracts 1 and 2 obtained according to the present invention consist primarily of broad-spectrum RHEs (particularly myconosides and pauciflosides) within the limits of quantitation. These compounds, especially the myconosides, have the high biological, antioxidant, antimutagenic and anticlastogenic activity demonstrated herein and are therefore suitable for use alone or in combination by dilution and by metered formulation for the preparation of products to be used as natural chemical, radiological and UV protection agents with a controlled degree of protection.The latter are used in human and veterinary medicine, dietary supplements and cosmetics for the prevention and treatment of harmful chemical, radiation and ultraviolet effects.

The invention relates to the technical field of polymer synthesis, and discloses a finely-controlled optical-grade polycarbonate (PC) polymerization method, optical-grade polycarbonate and application thereof. The method comprises the following steps: in an inert atmosphere, mixing bisphenol A, diphenyl carbonate and a composite catalyst for condensation polymerization, the composite catalyst contains sodium tetraphenylborate and nano cerium dioxide; the polycondensation reaction comprises three stages of gradient heating reactions, and the first stage reaction is that the reaction is carried out for 1-2 hours at 180-200 DEG C under normal pressure; in the second-stage reaction, the reaction is carried out for 3-4 hours at 220-240 DEG C and 10-15 kPa; and the third-stage reaction is as follows: the reaction is performed at 250-260 DEG C and less than 5kPa until the intrinsic viscosity of the reaction system reaches 0.5-0.6 dL / g. According to the method, the optical-grade polycarbonate with high light transmittance, low chroma, narrow molecular weight distribution and low free phenol content can be prepared.

The invention provides a manufacturing process of styrene-butadiene latex modified hot-melt phenolic resin, and relates to the technical field of high polymer materials, and the manufacturing process comprises the following steps: firstly, adding accurately metered phenol and a formaldehyde solution with a specific concentration into a reaction kettle provided with an intelligent temperature control and stirring system, adding an oxalic acid catalyst, and carrying out a multi-stage temperature control reaction to obtain a phenolic resin prepolymer; then, adding a proper amount of styrene-butadiene latex into the prepolymer, and raising the temperature to continue the reaction; cooling after the reaction is finished, adding a curing agent, uniformly stirring, and pouring into a specially treated mold for curing. An online monitoring device is introduced in the manufacturing process, and reaction conditions are adjusted in real time. The modified phenolic resin prepared by the process is excellent in performance, high in softening point, low in free phenol content and high in tensile strength and bending strength. The process is high in controllability, all links are accurately controlled through an advanced technology, the product quality and performance are effectively improved, powerful support is provided for application and expansion of phenolic resin, and the method has wide application prospects in numerous industrial fields.

The invention relates to a high-strength phenolic moulding compound for an automobile brake piston and a preparation method of the phenolic moulding compound. The phenolic moulding compound is prepared from the following raw materials: thermosetting phenolic resin, thermoplastic phenolic resin, glass fibers, wollastonite fiber powder, active whisker silicon, iron oxide pigment, a curing agent, a curing accelerator and a release agent. Wherein the thermosetting phenolic resin is obtained by feeding and reacting phenol and formaldehyde according to a molar ratio of 1: (1.90-1.95), the softening point of the thermosetting phenolic resin is 65-75 DEG C, the free phenol content is less than or equal to 5.5%, and the polymerization speed is 35-80S. The preparation method comprises the following steps: mixing the raw materials except for the glass fiber, and crushing the mixture at the temperature of less than 20 DEG C until the fineness is 100 meshes, so as to obtain a mixture; and uniformly mixing the mixture with the glass fiber, heating and mixing or extruding, and finally granulating and forming to obtain the glass fiber reinforced plastic. The high-aldehyde-ratio thermosetting phenolic resin is used as a main adhesive, so that the high-temperature performance is excellent, and the size can be stabilized; fiber fillers with three particle sizes are used, so that the strength, hardness and wear resistance of a workpiece are improved; the resin system is tightly combined, so that the product is water-resistant and solvent-resistant, and the application is expanded.

This invention relates to a method for improving the intestinal tolerance of wheat bran dietary fiber based on synergistic modification by microorganisms and enzymes. The method includes ultra-fine grinding and high-pressure moist heat activation of wheat bran; multi-enzyme synergistic microbial stepwise treatment, first using high-temperature amylase and neutral protease to remove interfering components such as starch and protein, then using laccase to degrade lignin, resulting in a looser structure; subsequently, phytase efficiently degrades phytic acid, Aspergillus nidulan degrades the side chains of arabinogalactan, and snail enzyme and ferulic acid esterase work synergistically to convert insoluble arabinoxylan into soluble dietary fiber and release phenolic antioxidants. This method increases the soluble dietary fiber content of wheat bran by 2 times, reduces phytic acid to 10 mg / g, increases free phenolic acid content by 40%, achieves a DPPH free radical scavenging rate of 60%, significantly enhances antioxidant activity, and significantly reduces IgG levels in mouse models compared to those consuming unmodified wheat bran, thus improving intestinal tolerance and probiotic function; the product can be used as a high-quality functional food ingredient.

The invention discloses moisture-absorption-resistant environment-friendly precoated sand and a preparation method thereof. According to the invention, long-chain alkyl trialkoxysilane and an epoxy silane coupling agent are subjected to co-hydrolytic polycondensation under an acidic condition, such that the organosilicon hydrophobic agent with epoxy reaction activity is prepared. And then in a film coating process, the surface of hot sand is coated with the hydrophobic agent, then thermosetting phenolic resin and a curing agent are sequentially added, and a final product is obtained after mixing, grinding, cooling and crushing. According to the method, a hydrophobic interface layer anchored through chemical bonds is constructed between sand grains and resin, a stable physical water blocking barrier is formed through long-chain alkyl, firm interface combination is achieved through active group reaction, and therefore the moisture absorption resistance of the precoated sand is fundamentally improved. Meanwhile, the environment-friendly resin with low free formaldehyde and low free phenol is combined, so that the gas forming amount of the product is remarkably reduced.

The invention discloses a preparation method for improving the extraction efficiency and fidelity of plant combined polyphenol, and relates to the field of functional food preparation. The extraction method comprises the following steps: 1, adding a raw material into an acetone aqueous solution, shaking at room temperature or homogenizing to extract free phenol, and carrying out residue-liquid separation to obtain a raw material without the free phenol; 2, adding a sodium hydroxide solution and an organic solvent which is immiscible with water into the raw material without the free phenol; 3, after room-temperature shaking extraction, collecting an upper-layer organic phase, and adjusting the pH value of a lower-layer water phase to 1.0-2.0; 4, extracting the water phase by using ethyl acetate; and 5, combining the upper organic phase and the ethyl acetate phase, and carrying out vacuum concentration and drying to obtain the combined polyphenol extract. Compared with a conventional combined polyphenol extraction method, the combined polyphenol extraction method established by the invention can effectively improve the extraction efficiency of the combined polyphenol in the raw materials, and can reduce the degradation of combined polyphenol substances to ensure the authenticity of the combined polyphenol.

A myconoside containing extract is derived from in vitro systems of plants belonging to the family Gesneriaceae, in particular from the genera Haberlea and Ramonda, also including the species Haberlea rhodopensis Friv., Ramonda heldreichii (Boiss.) C. B. Clarke; Ramonda myconi (L.) Rchb.; Ramonda nathaliae Pancic & Petrovic, and Ramonda serbica Pancic, as well as from their hybrids. The extract is used in human and veterinary medicine, nutritional supplements and cosmetics as chemo-, radic- and UV protector. Extract 1 comprises 0.1 to 55.0 wt % PHE and free phenols, sugars, organic-, fatty- and amino acids, sterols up to 100 wt %, while Extract 2 comprises 55.0 to 99.9 wt % of PHE (in particular, myconoside and paucifloside), and phenolic compounds, mono-, disaccharides or their residues up to 100 wt %. Extracts 1 and 2 obtained according to this invention mainly consist of RHE (in particular, myconoside and paucifloside) within a broad spectrum and quantitative limits.

The application discloses a modified phenolic resin and a preparation method thereof, and a rubber composition, and belongs to the rubber material field. The preparation method of the modified phenolic resin comprises the following steps: performing one-stage condensation reaction on a phenolic compound and a first-stage aldehyde, and then performing one-stage dehydration treatment to obtain a first-stage resin; and performing two-stage condensation reaction on the first-stage resin, a second-stage aldehyde and lignin to obtain the modified phenolic resin. The preparation method provided in the application embodiment adds lignin to modify the phenolic resin, realizes effective utilization of the natural resource of lignin, and enables the modified phenolic resin to better improve the adhesive property while keeping good mechanical property and vulcanization property when being applied to rubber and other reinforcing adhesive materials. Meanwhile, the specific step-by-step preparation process effectively improves the reaction activity and efficiency of the lignin, can improve the modification effect, and can effectively reduce the free phenol content in the modified phenolic resin, which is beneficial to better application of the modified phenolic resin.

The invention relates to a preparation method of sulfurized alkylphenate. The oxidation resistance of the obtained sulfurized alkylphenate is remarkably improved, and the content of free phenol is reduced to 2% or below.

The invention belongs to the crossing field of plant-based food and nanotechnology, and particularly relates to a vitamin E-coffee nanoparticle compound as well as a preparation method and application thereof, the vitamin E-coffee nanoparticle compound comprises coffee nanoparticles and vitamin E loaded on the surfaces of the coffee nanoparticles; wherein the coffee nanoparticles are nanoscale particles separated from a coffee extracting solution, and the coffee nanoparticles naturally carry polyphenol compounds; the vitamin E is loaded on the surfaces of the coffee nanoparticles through non-covalent acting force. The vitamin E-coffee nanoparticle compound is used for replacing a traditional coffee polyphenol extract, so that the problems of protein aggregation, precipitation and phase separation caused by interaction of free phenolic acid and vegetable protein are effectively avoided, and the product can be kept in a uniform colloidal state for a long time in the storage period. Meanwhile, the dispersity and the stability of the fat-soluble vitamin E in a water-phase system are greatly improved, and coffee polyphenol carried by the fat-soluble vitamin E is also retained.

The invention discloses a method for characterizing gastrointestinal digestion characteristics of phenolic substances in fermented red date juice, which comprises the following steps of: simulating a gastrointestinal digestion model in vitro, sampling a stomach phase and an intestine phase of a fermented product at different times, measuring the content of free phenol, bound phenol and total phenol and antioxidant activity, calculating digestion stability and bioaccessibility, and constructing multiple characterization thresholds. Operation is simple, and repeatability is good.

The present application relates to a kind of preparation methods of high purity tert-butylated triphenyl phosphate, belong to flame retardant production technical field, comprising the following steps, with first part of phosphorus oxychloride is mixed with tert-butyl phenol, after heating and melting, obtain mixed solution, standby.This high purity tert-butylated triphenyl phosphate preparation method, using step-by-step reaction and twice negative pressure distillation process, significantly reduce the formation of harmful by-product triphenyl phosphate, the content of triphenyl phosphate in product can be reduced to 1% or less, can be as low as 0.57%, by optimizing catalyst type and caustic wash condition, product is colorless or slightly yellow transparent state, product acid value is as low as 0.01~0.02mgKOH / g, free phenol content is less than 0.01%, using magnesium chloride instead of traditional aluminium chloride, dosage is only 0.1%~0.2%, catalytic effect is good, product yield can be as high as 98% or more, hydrogen chloride gas produced in the reaction process is absorbed to form by-product hydrochloric acid, reduce "three wastes" emissions.

The invention relates to the technical field of preparation of chemical treatment agents, in particular to a preparation method of an anti-deformation treatment agent for plywood. The problem that an anti-deformation treatment agent is poor in anti-deformation durability is solved. Soybean oil is epoxidized through hydrogen peroxide and formic acid to prepare bio-based epoxy resin, an epoxy group of the bio-based epoxy resin and hydroxyl of wood cellulose are subjected to nucleophilic ring opening crosslinking to form a three-dimensional hydrogen bond network, meanwhile, a bio-based polyol flexible chain segment synthesized by castor oil epoxy resin and triethanolamine is fused, and the impact resistance and construction permeability are improved; and then fusing with formaldehyde-free phenolic resin obtained by catalytic condensation of alkaline lignin through glyoxal base to realize zero formaldehyde release and compatibility with plywood raw materials and enhance durable shear strength. During hybridization, a chitosan cationic catalyst is added to promote protonation ring opening of epoxy-phenolic hydroxyl groups and bonding of a silane coupling agent bridging interface, a uniform network is formed, warping and water absorption rate are reduced synergistically, and a water contact angle is increased. No volatile organic compound exists in the whole process, and plywood standards are met.

The invention discloses an echelon preparation device and process of litchi pomace polyphenol and dietary fiber, and belongs to the technical field of agricultural waste resource utilization. The device comprises an extraction tank, a column chromatography module, a screw lifter, an ultrasonic probe and a liquid outlet, the process specifically comprises the following steps: (1) adding litchi pomace and choline chloride-glycerol into an extraction tank, extracting free phenol under the assistance of an ultrasonic probe, synchronously adsorbing and separating the free phenol by using a column chromatography module, and recovering the choline chloride-glycerol; and (2) adding choline chloride-malonic acid into the extraction tank, extracting bound phenols and soluble dietary fibers in the residues, carrying out alcohol precipitation treatment on a supernatant solution to respectively obtain bound phenols and soluble dietary fibers, and taking residual residues as insoluble dietary fibers. By designing an extraction and purification integrated device and designing a deep eutectic solvent (DES) choline chloride-glycerol and choline chloride-malonic acid in a targeted manner, efficient and echelon preparation of polyphenols and dietary fibers in litchi pomace is realized.

The invention provides phenolic resin for a low-free-phenol friction material and a preparation method of the phenolic resin, and belongs to the technical field of preparation of high polymer materials. The adhesive is prepared from 4000-5000kg of phenol, 2800-3500kg of 37% formaldehyde, 60-75kg of oxalic acid and 256-320kg of a modifier, the curing time of the adhesive is less than or equal to 110 seconds, the fluidity of the adhesive is 20-30mm, the hexamine content of the adhesive is 12%-14%, and the molecular weight of the adhesive is 13000-15000Mw. The preparation method comprises the following steps: mixing phenol and a modifier, adding oxalic acid, and heating to a preset temperature; dropwise adding formaldehyde at a constant speed within a certain time, heating to 100 DEG C, and carrying out reflux reaction at normal pressure for 3 hours; after detecting that the free aldehyde is less than 1%, dehydrating under a vacuum condition until the viscosity is reached and the free phenol is qualified; and finally, cooling by a steel belt, crushing and sieving to obtain a phenolic resin product. The problem that the existing friction material phenolic resin is high in flexibility, heat resistance, hardenability and free phenol content is solved.

The invention provides a preparation method of thermosetting phenolic resin, and relates to the technical field of preparation of chemical materials, phenol and formaldehyde are added into a reaction kettle according to the molar ratio of 1: (1.2-1.8), the formaldehyde is added in the form of an aqueous solution with the mass fraction of 37%, a catalyst accounting for 0.5-1.5% of the mass of the phenol is added into the reaction kettle, the catalyst is oxalic acid, and the reaction kettle is heated to 80-90 DEG C; the preparation method comprises the following steps: reacting at the temperature of 80-90 DEG C for 1-2 hours, adding a surfactant which accounts for 0.1-0.5% of the total mass of initial reaction materials and is sodium dodecyl benzene sulfonate into a reaction system, and continuously introducing inert gas which is nitrogen in the reaction process at the introduction rate of 0.5-1.5 L / min, the thermosetting phenolic resin prepared by the invention has higher viscosity, which means that the thermosetting phenolic resin can provide stronger binding power and better formability in application. Due to the lower free phenol content, the pollution to the environment and the potential harm to a human body are reduced, and meanwhile, the purity and the quality of the product are also improved.

The invention provides a novel lubricating oil detergent as well as a preparation method and application thereof, and the preparation method comprises the following steps: carrying out alkylation reaction on phenol, long-chain olefin and a solid acid catalyst to obtain a substituted alkylphenol system; the method comprises the following steps: adding an aldehyde compound and a condensation catalyst into a substituted alkylphenol system for condensation reaction to obtain an alkylphenol intermediate; a calcium source, base oil and a solvent are added into the alkylphenol intermediate for a neutralization reaction, an alcohol compound is added after the reaction is finished, then carbonation is performed, a product is subjected to aftertreatment, and the novel lubricating oil detergent is obtained. The novel lubricating oil detergent is free of sulfur and free phenol residues, and has excellent detergency, oxidation resistance and corrosion resistance.

The invention relates to a method for synthesizing high-carbon phenolic resin and extracting ortho-position and para-position alkylphenol, which is applied to the technical field of organic synthesis and separation and comprises the following steps: taking phenol or phenol and ortho-cresol-containing mixed phenol as a first component and at least one of various alkylphenols selected from coal chemical industry crude phenol rectification products as a second component, carrying out segmented polymerization reaction with aldehyde and a catalyst; controlling the reaction until the content of meta-position phenol is less than or equal to 1% and the content of free phenol is 5-30%, and steaming out unreacted phenol; carrying out secondary polymerization and solvent extraction on the distillate, and rectifying to obtain a product containing high-purity phenol and a plurality of ortho-position and para-position alkylphenols; and dehydrating the resin phase to obtain the high-carbon-content phenolic resin. According to the method, petrochemical phenol is partially replaced with cheap coal-based phenol, various high-added-value alkylphenols are co-produced while high-performance phenolic resin is synthesized, and high-value utilization of resources and cost reduction and efficiency improvement of the process are achieved.

The invention relates to the technical field of chemical synthesis, and particularly discloses a method for synthesizing phenolic hydroxyl modified polysiloxane through a phenolic hydroxyl protection-deprotection two-step method. The method comprises the following steps: S1, phenolic hydroxyl group protection: by taking unsaturated olefin phenol as a raw material, carrying out selective protection on hydrogen atoms in phenolic hydroxyl groups by adopting a protective agent to obtain a phenolic hydroxyl group protection type olefin phenol intermediate; s2, hydrosilylation: under the action of a platinum catalyst, carrying out an addition reaction on the intermediate and hydrogen-containing silicone oil in an organic solvent to obtain protective phenolic hydroxyl modified polysiloxane; s3, deprotection: adding a deprotection reagent into the protective phenolic hydroxyl modified polysiloxane for reaction, and separating and purifying to obtain the phenolic hydroxyl modified polysiloxane. According to the invention, the selectivity of hydrosilylation reaction and the product yield are obviously improved, the content of free phenol in the product is low, and the product has the weather resistance of organic silicon and the reaction activity of phenolic hydroxyl groups, and can be widely applied to many fields.

The present invention belongs to the technical field of fermented foods, and discloses a method for preparing fermented soy milk rich in polyphenols. Lactobacillus delbrueckii MT772183 is inoculated into whole bean soy milk for fermentation to obtain fermented soy milk rich in polyphenols. The present invention utilizes Lactobacillus delbrueckii MT772183 with β-glucosidase activity to ferment whole bean soy milk, and the presence of bean dregs effectively stimulates the ability of Lactobacillus delbrueckii MT772183 to produce β-glucosidase. During the whole bean fermentation process, a large amount of insoluble polyphenols in the bean dregs are dissolved, and the free phenols, bound phenols, total phenols, free flavonoids, bound flavonoids, total flavonoids and soy isoflavone aglycones therein are significantly higher than those in de-slag soy milk and semi-de-slag soy milk. At the same time, whole bean fermentation increases the thickness (viscosity) of the fermented soy milk; provides a rich mouthfeel; the fermented product contains prebiotics such as dietary fiber, oligosaccharides and polyphenols, and long-term use can regulate intestinal flora, thereby improving the bioabsorption rate and bioavailability of polyphenols.