216 results about "Sebacic acid" patented technology

The invention discloses a nylon elastomer preparation method, which comprises: S1, weighing preparation raw materials of a nylon elastomer according to a feeding ratio, and weighing the preparation raw materials by using a weighing device, the nylon elastomer is prepared from the following raw materials: tridecane diamine, tridecane dibasic acid, dodecanediamine, dodecanedioic acid, undecanediamine, undecanedioic acid, decamethylene diamine, sebacic acid, pentamethylene diamine, glutaric acid, hexamethylenediamine, adipic acid, caprolactam, and one or more of polyether amine and polyether alcohol; and S2, feeding the preparation raw materials weighed in the step S1. In the preparation process of the nylon elastomer, the nylon elastomer with different melting points, different crystallization temperatures, different strengths and different elongation at break is produced by adopting a multi-component copolymerization mode and adjusting the types and the molecular weights of polyether amine and polyether alcohol by adjusting the types and the proportions of binary acid and diamine, so that the nylon elastomer is suitable for different use environments; the utilization rate is improved.

The invention discloses a coating type high-molecular flame-retardant material. The composite material is prepared from the following components: organic silicon modified epoxy resin, a bio-based castor oil derivative, hydroxyapatite, carbon nanofibers, expanded graphite, ammonium polyphosphate, zinc borate, nano silicon dioxide, molybdenum oxide, microencapsulated red phosphorus, magnesium hydroxide, melamine cyanurate, aluminum diethylphosphinate, pentaerythritol, trihydroxymethyl phosphine oxide and a silane coupling agent. The coating is prepared from a titanate coupling agent, stearic acid, polyethylene glycol, 2, 6-butylated hydroxytoluene, triphenyl phosphite, 2, 4-dihydroxybenzophenone, sebacic diester, polytetrafluoroethylene micro powder, a modified polydimethylsiloxane flatting agent, organic montmorillonite, a polyether modified silicon defoaming agent and a solvent. The invention has the beneficial effects of high flame retardant efficiency, environmental friendliness, excellent comprehensive performance and excellent processability.

The invention relates to the technical field of sunscreen cosmetics, in particular to an oil-in-water gel bead sunscreen emulsion and a preparation method thereof. The oil-in-water gel bead sunscreen emulsion comprises gel beads and a dispersion liquid, the oil-in-water gel bead sunscreen emulsion comprises, by mass, 60-80 parts of oil gel and 20-40 parts of an oil-soluble sunscreen agent, and the mass part of the dispersion liquid is 2-20 times that of the gel beads; the oil gel comprises 3-16 parts of a gelling agent, and the gelling agent comprises 0-4 parts of a hydrogenated castor oil / sebacic acid copolymer, 3-12 parts of a castor oil / isophorone diisocyanate copolymer, 0-3 parts of an additional component and 80-90 parts of grease. According to the oil-in-water gel bead sunscreen emulsion and the preparation method thereof, the oil-in-water gel bead sunscreen emulsion is stable in structure, the oil-soluble sunscreen agent can be well dispersed, meanwhile, the waterproof performance and the skin feeling can be guaranteed, and the sunscreen effect is good. The problems that in the prior art, an oil-in-water product is poor in waterproof performance, and a sun-screening agent is uneven in dispersion in a system, prone to precipitation and the like, so that the product is poor in sun-screening performance are solved.

The invention belongs to the technical field of preparation of hot melt adhesives, and particularly relates to a high-strength quick-curing bio-based hot melt adhesive and a preparation method thereof. The preparation method comprises the following steps: preparing a dimer acid polymer from dimer acid, sebacic acid, polyether amine, ethylenediamine, an antioxidant and a catalyst, and mixing the dimer acid polymer with a beta nucleating agent toughened polypropylene / SiO2 nano-composite and an organic borosiloxane polymer to obtain the high-strength quick-curing bio-based hot melt adhesive. The prepared hot melt adhesive has good mechanical property, viscosity and self-healing property.

The invention relates to the technical field of metal working fluids, in particular to a degradable environment-friendly vegetable oil-based semi-synthetic cutting fluid and a preparation method thereof. The cutting fluid comprises 20-30 parts of vegetable lubricating oil, 10-20 parts of an alkali storage agent, 2-5 parts of a corrosion inhibitor, 3-5 parts of a coupling agent, 5-8 parts of a surfactant and 6-11 parts of a composite anti-rust agent, the composite anti-rust agent comprises an anti-rust agent A and an anti-rust agent B, the anti-rust agent A comprises N-[3-(dimethylamino) propyl]-N, N-dimethylformamide, and the anti-rust agent B comprises N-[3-(dimethylamino) propyl]-N, N-dimethylformamide. The antirust agent A comprises at least one of N, N ', N'-trimethyl-1, 3-propanediamine, benzotriazole, sebacic acid and 2, 4, 6-tri (aminocaproic acid)-1, 3, 5-triazine, and the antirust agent B comprises at least one of an imidazoline compound and fatty acid sarcosine ester. The cutting fluid provided by the invention has excellent corrosion resistance, rust resistance, defoaming property, biodegradability and storage stability, and has a good application prospect.

The invention provides a cold-resistant high-insulation polyvinyl chloride cable material and a preparation method thereof, and belongs to the technical field of cables, and the cold-resistant high-insulation polyvinyl chloride cable material comprises the following components by mass: 100 parts of polyvinyl chloride resin; 30 to 40 parts of dioctyl sebacate; 1-7 parts of a composite stabilizer; 5 to 10 parts of nano filler; 0.1 to 0.5 part of an antioxidant; and 1-1.5 parts of a lubricant. According to the cold-resistant high-insulation polyvinyl chloride cable material and the preparation method thereof provided by the invention, the low-temperature performance of the polyvinyl chloride cable material is improved, and the insulation performance of the polyvinyl chloride cable material is also improved, so that the cold-resistant high-insulation polyvinyl chloride cable material is formed and is suitable for wide popularization and application.

The invention discloses a high-rate lithium iron phosphate positive electrode material, a preparation method thereof and a battery, and belongs to the technical field of batteries, the preparation method comprises the following steps: mixing iron phosphate, a lithium source, a carbon source and an additive with a solvent, and carrying out coarse grinding and fine grinding to obtain mixed slurry; and carrying out spray drying on the mixed slurry, sintering in a nitrogen atmosphere, and naturally cooling to room temperature to obtain the high-rate lithium iron phosphate positive electrode material. The preparation method of the additive comprises the following steps: treating titanium dioxide with sebacic acid to obtain modified titanium dioxide; kH550 is adopted to treat zirconium oxide, and modified zirconium oxide is obtained; the modified titanium dioxide, the modified zirconium oxide and polyethylene glycol diamine 200 are added into N, N-dimethylformamide to be treated, a mixture is obtained, low-temperature heat treatment, ball milling and drying are conducted, and the additive is obtained. The high-rate lithium iron phosphate positive electrode material prepared by the method has excellent electrochemical performance, the charge-discharge specific capacity and the rate capability are well improved, and the high-rate lithium iron phosphate positive electrode material has high discharge specific capacity under different rates.

The invention discloses environment-friendly metal cutting oil with high bearing capacity and high wear resistance, and belongs to the technical field of metal cutting fluid. The cutting fluid is composed of diisooctyl sebacate, a phosphate amine salt extreme pressure additive, a borate additive and a sulfurized extreme pressure additive, the sulfurized extreme pressure additive is sulfurized fatty acid ester and dialkyl pentasulfide (Rc2540), and the addition amount of the phosphate amine salt extreme pressure additive is 0.12-0.80% of the weight of base oil; the addition amount of the borate additive is 0.05-1.45% of the weight of the base oil, the addition amount of the sulfurized fatty acid ester is 0.10-0.85% of the weight of the base oil, and the addition amount of the dialkyl pentasulfide (Rc2540) is 0.20-0.85% of the weight of the base oil. The bearing capacity (Pb) of the cutting oil can reach more than 920N, and the diameter (Db) of a low-load long grinding scar can be less than 0.35 mm.

The invention provides an epoxidized soybean oil-binary acid bio-based dynamic polymer, a preparation method thereof and a paper-based strain sensor packaged by the epoxidized soybean oil-binary acid bio-based dynamic polymer. The preparation method of the dynamic polymer comprises the following steps: (1) taking epoxidized soybean oil as an epoxy monomer, aliphatic dibasic acid as a flexible monomer and aromatic dibasic acid as a rigid monomer, and carrying out polymerization reaction in the presence of a transesterification catalyst to obtain a dynamic polymer prepolymer; the aliphatic binary acid comprises succinic acid, adipic acid and sebacic acid; (2) removing bubbles from the dynamic polymer prepolymer; and (3) carrying out thermal curing on the dynamic polymer prepolymer to obtain the epoxidized soybean oil-binary acid bio-based dynamic polymer. The epoxidized soybean oil-binary acid bio-based dynamic polymer has good mechanical properties and hydrophobicity, a paper-based strain sensor based on the epoxidized soybean oil-binary acid bio-based dynamic polymer also has good mechanical properties and hydrophobicity, and the sensor has certain application potential in the field of human motion monitoring.

The invention discloses an optical paste film and a preparation method thereof, and relates to the technical field of optical functional materials. The optical slurry film is prepared by taking a polyethylene glycol terephthalate film as a base material and coating an optical slurry coating, the optical slurry coating is prepared from the following raw materials in parts by weight: 12 to 16 parts of nano silicon dioxide, 22 to 28 parts of acetone and butanone mixed solvent, 7 to 9 parts of modified titanium dioxide, 4 to 6 parts of nano zirconium oxide, 30 to 35 parts of modified epoxy resin, 18 to 22 parts of butyl acrylate, 4 to 6 parts of dioctyl sebacate, 2.5 to 3.5 parts of silane coupling agent KH-570, 1 to 1.5 parts of organic silicon flatting agent and 0.6 to 1 part of organic silicon defoaming agent. 1.2-1.8 parts of an antioxidant 1010, 3-4 parts of a photoinitiator 184 and 6-8 parts of bis (4-tert-butylphenyl) iodine hexafluorophosphate; the polyethylene glycol terephthalate film pretreatment material comprises absolute ethyl alcohol and deionized water. The raw materials are scientifically proportioned, the titanium dioxide and the epoxy resin are clearly modified, the preparation process is complete, and the finished product is high in light transmittance, good in weather resistance, adaptive to the requirements of the optical field and high in practicability.

The invention provides a novel analgesic injection composition. The composition comprises tapentadol in an active ingredient quick release form and a quick-acting and long-acting composition of bistapentadol sebacate in an active ingredient slow release form. The invention also relates to a method for preparing the quick-acting and long-acting injection composition and application of the prepared dosage form in preparation of medicines for treating chronic or acute pain, such as preoperative and postoperative administration. The quick-acting and long-acting injection composition provided by the invention has ideal pharmaceutical technology and clinical attributes.

Provided are a polyester-based plasticizer which is excellent in cold resistance, non-migration, oil extraction resistance, volatility resistance and the like in a well-balanced manner, which particularly allows a molded article to be excellent in oil extraction resistance and transparency, and which can be produced from a biomass resource, and a vinyl chloride-based resin composition containing the polyester-based plasticizer and a molded article thereof. A polyester-based plasticizer obtained from a dibasic acid component (A), a glycol component (B), a hydroxy acid component (C), and an end termination component (D), wherein the component (A) is one or more selected from the group consisting of sebacic acid, azelaic acid and succinic acid, the component (B) is one or more selected from the group consisting of 1,2-propylene glycol, 1,3-propylene glycol, 1,3-butanediol and 1,4-butanediol, the component (C) is 12-hydroxystearic acid, and the end termination component (D) is one or more selected from the group consisting of a monovalent fatty acid having 8 to 12 carbon atoms and a linear monohydric alcohol having 6 to 10 carbon atoms.

The invention discloses composite ester-based hydraulic oil and a preparation method thereof, and belongs to the technical field of hydraulic oil preparation. The hydraulic oil based on the complex ester comprises the following components: pentaerythritol synthetic ester, polysebacic acid glycol ester, a viscosity-temperature performance regulator, an ash-free antioxidant, a bio-based anti-wear agent and a nano modifier. Wherein the pentaerythritol synthetic ester is a mixed ester obtained by carrying out a reaction on a mixture of 2-ethylhexanoic acid, 3, 5-dimethylhexanoic acid and 4-methyloctanoic acid and pentaerythritol, and the pentaerythritol synthetic ester is a mixture of 2-ethylhexanoic acid, 3, 5-dimethylhexanoic acid and 4-methyloctanoic acid; the viscosity-temperature performance regulator is a grafted copolymer obtained by grafting poly (N-isopropylacrylamide) to a poly (ethylene sebacate) molecular chain through an ester exchange reaction. The product prepared by the method disclosed by the invention can effectively solve the contradiction between the environmental protection performance and the comprehensive performance of the traditional hydraulic oil through the synergistic effect of the components, has the characteristics of high biodegradation rate and good oxidation resistance and hydrolytic stability, and can keep excellent performance in both low-temperature and high-temperature environments.

The invention discloses an extraction method of sebacic acid. The method comprises the following steps: firstly, adjusting sebacic acid fermentation liquor produced by a microbial fermentation method, and accurately controlling the temperature, viscosity and pH value to obtain first mixed liquor; heating and preserving heat to obtain a second mixed solution, and performing membrane filtration; and after the filtrate is subjected to acidification crystallization and solid-liquid separation, solid matters are washed and refined, and secondary treatment can also be carried out. Compared with the prior art, the method is more accurate in parameter control of each step, and key steps such as decoloration pretreatment are added. The prepared sebacic acid product is higher in purity, the content of sebacic acid is larger than or equal to 99.9%, the content of impurities such as water, ash, iron ions and nitrogen is lower, and the color / light transmittance is better. The method can reduce the consumption of acid and alkali and the content of inorganic salt in water, reduces the sewage treatment load, is simple and convenient to operate, is suitable for large-scale industrial production, and has important significance for improving the quality and production benefits of sebacic acid products.

The invention discloses a sebacic acid production wastewater treatment and recycling process which comprises the following steps: a heat pump evaporation system comprises an evaporator, a compressor, a circulating pump and a heating heat exchanger, sebacic acid production wastewater is efficiently desalted through the heat pump evaporation system, and obtained steam enters a catalytic combustion device for catalytic combustion reaction; the final effluent is reused for an evaporation process and a crude sebacic acid washing process in the production process. Low-level heat energy of the system is recovered through the heat pump technology, evaporation energy consumption is remarkably reduced, gas-phase oxidation removal of organic matter is achieved through catalytic combustion, and secondary pollution is avoided; meanwhile, closed-loop recycling of wastewater is achieved, fresh water consumption and wastewater discharge are greatly reduced, and the comprehensive advantages of being low in operation cost, high in treatment efficiency, high in environmental friendliness and the like are achieved.

The invention discloses an iron antirust agent composition and a preparation method and application thereof.The iron antirust agent composition comprises fatty alcohol-polyoxyethylene ether carboxylic acid, sebacic acid, C21 binary acid, triethanolamine and water, and the preparation method comprises the steps that fatty alcohol-polyoxyethylene ether carboxylic acid, sebacic acid and C21 binary acid are mixed and stirred to be uniform under the heating condition; and slowly adding triethanolamine, continuously stirring until the triethanolamine is completely dissolved, and cooling to room temperature to obtain the iron antirust agent composition. The problems that an existing iron antirust agent is poor in environmental protection property, not lasting in antirust effect and the like are solved.

The invention belongs to the technical field of reinforcement and repair of paper archives, and relates to a paper pink pencil handwriting display reinforcing agent and a preparation method and application thereof, the paper pink pencil handwriting display reinforcing agent is formed by ethyl cellulose, an organic solvent, diphenyl-isooctyl phosphite and bis (1, 2, 2, 6, 6-pentamethyl-4-piperidyl) sebacate; the volume ratio of the organic solvent to the diphenyl-isooctyl phosphite to the bis (1, 2, 2, 6, 6-pentamethyl-4-piperidyl) sebacate is (14 to 16): (2 to 3): 1; 3 g of ethyl cellulose is added into every 100 mL of the organic solvent; the organic solvent is formed by mixing ethyl acetate, acetone and n-butyl alcohol which are equal in volume. The display reinforcing agent disclosed by the invention has excellent anti-hydrophilic property, and the pink pencil writing is not easy to fall off; the blue printing paper also has the effect of inhibiting light scattering, so that the handwriting developing definition is improved, the blue printing paper is not easy to age and fade, and long-term storage of the blue printing paper is realized.

The invention provides a bio-based dual-dynamic network polymer as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, mixing an epoxy monomer, binary acid, graphene and a transesterification catalyst, and heating for polymerization reaction to obtain a prepolymer; wherein the epoxy monomer comprises polyethylene glycol diglycidyl ether and glycerol triglycidyl ether, and the binary acid comprises sebacic acid, 2, 5-furandicarboxylic acid and 2, 2 '-dithiodibenzoic acid; and S2, removing bubbles from the obtained prepolymer, and then carrying out thermocuring to obtain the bio-based dual-dynamic network polymer. The bio-based dual-dynamic network polymer obtained by the invention has good mechanical properties, hydrophobicity, solvent resistance, alkali recoverability, self-healing and shape memory properties, and has certain application potential in the fields of intelligent actuators and flexible sensors.

The invention belongs to the technical field of preparation of hot melt adhesives, and particularly relates to a quick-curing bio-based hot melt adhesive and a preparation method thereof. Cyclosiloxane, mercapto acid and polyether amine are used as raw materials, siloxane modified polyether amine is obtained through ring opening polymerization, mercapto-alkene click reaction and amidation reaction, then siloxane modified polyether amine is mixed with dimer acid, sebacic acid, an antioxidant, a catalyst, organic borosiloxane and stearic acid, and the quick-curing bio-based hot melt adhesive is obtained. The prepared hot melt adhesive has good low temperature resistance, viscosity and self-healing property, and the dimer acid is used as a main bio-based raw material, so that the hot melt adhesive has good biodegradability and is environmentally friendly and sustainable.

The invention discloses a composite propellant containing a high-nitrogen ferrocene derivative and a preparation method of the composite propellant. The composite propellant is prepared from the following components: 14.05% of hydroxyl-terminated polybutadiene (HTPB), 7.03% of diisooctyl sebacate (DOS), 0.92% of 2, 4-toluene diisocyanate (TDI), 1% of the high-nitrogen ferrocene derivative, 59% of ammonium perchlorate (AP) and 18.00% of aluminum powder (Al). N, N-dimethylaminomethylferrocene in the three high-nitrogen ferrocene derivatives has the effects of improving the burning rate of the composite propellant and reducing the pressure index as the ferrocene derivative, nitrate, picric acid, 3-nitro-1, 2, 4-triazole-5-ketone and the like are rich in C, H, O and N elements, and are similar to oxidizing agents such as typical components ammonium nitrate, HMD and the like in the composite propellant; the fuel can be decomposed to provide energy for propellant combustion; the propellant has a low combustion rate pressure index in a pressure range of 1-10 MPa, and has more excellent combustion stability.

The invention discloses bio-based polyamide with low water absorption and a preparation method thereof, and belongs to the technical field of polyamide preparation. The bio-based polyamide with the low water absorption rate is prepared from the following components in parts by weight: 30 to 50 parts of pentamethylene diamine, 15 to 30 parts of sebacic acid, 5 to 12 parts of citric acid, 5 to 10 parts of hexamethylenediamine, 2 to 5 parts of a hydrophobic auxiliary agent and 1 to 5 parts of a modified high-temperature-resistant additive, the hydrophobic additive is prepared from acetoxybenzoic acid, nonadecanoic acid, m-dimethoxybenzene, trifluoroacetic anhydride and methyl tert-butyl ether as raw materials, and the modified high-temperature-resistant additive is prepared from o-phenylenediamine, chloroacetic acid, vanillin, benzoyl bromide and thiourea as raw materials. The bio-based polyamide prepared from the substances has low water absorption and excellent thermal stability.

This invention discloses a low-conductivity coolant for microchannel water-cooled plates and its application. The coolant, by mass fraction, comprises 85-95% propylene glycol, 1-5% deionized water, 0.05-0.15% imidazole, 0.1-0.3% toluenetriazole, 0.10-0.4% sebacic acid, 0.1-0.3% benzoic acid, 3-4% triethanolamine, and 0-0.06% defoamer. The coolant is stirred evenly with deionized water, and the resulting mixture is placed in the micron-level fluid channels inside the microchannel water-cooled plate. The high-speed flow of the mixture absorbs the heat dissipated by the chip. The coolant prepared by this invention exhibits low corrosivity, high reserve alkalinity, low foaming tendency, and low conductivity. This coolant can be used safely and efficiently in microchannel structures, meeting the growing heat dissipation needs of AI big data computing centers.

The invention relates to the technical field of circulating water systems, in particular to a circulating water system protective agent and a preparation method thereof.The circulating water system protective agent is prepared from, by weight, 20-40 parts of lipid matrixes, 10-20 parts of carboxyl-containing organic compounds, 8-15 parts of ester-containing organic compounds, 5-12 parts of hydrophilic functional auxiliaries, 5-8 parts of modified functional agents, 4-7 parts of nano silver powder, 1-3 parts of dispersing agents and 4-7 parts of auxiliary agents. The polyol ester in the formula can form a stable complex with calcium and magnesium ions in water, and crystal nucleus formation and growth of carbonate and sulfate scales are inhibited; the carboxyl-containing organic compounds (adipic acid and sebacic acid) have strong chelating ability, and can disperse scale forming ions in water and prevent deposition of scale bodies.

The invention provides a whitening composition as well as a preparation method and application thereof, and belongs to the technical field of cosmetics. According to the whitening composition provided by the invention, the isopropyl lauroyl sarcosinate, the diisopropyl sebacate, the PPG-14 polyglycerol-2 ether, the bis-diethoxy diglycol cyclohexane 1, 4-dicarboxylate and the poly C10-30 alkanol acrylate are used as oil phases to wrap the whitening components (magnolol, pterostilbene, ferulic acid and dimethyl methoxy benzodihydropyranol) so as to form oil sacs, so that the whitening composition can be used for whitening the skin; and then dispersing in a polyhydric alcohol and carbomer matrix to control the composition of the oil phase and the whitening component, so that the whitening effect and the transdermal absorption effect of the whitening composition are improved.

To provide a resin composition which has improved impact resistance at low temperature.SOLUTION: A resin composition contains a 3-hydroxyalkanoic acid-based polymer represented by formula (I), and a polyester-based polymer, wherein the polyester-based polymer is composed of a monomer unit composed of only a polyhydric alcohol component and a dicarboxylic acid component, at least a part of a terminal of the polyester-based polymer is sealed with a residue of monoalcohol and / or a residue of a monocarboxylic acid, polyhydric alcohol of the polyhydric alcohol component is MPD(3-methyl-1,5-pendandiol) and / or TMP(trimethylol propane), a dicarboxylic acid of the dicarboxylic acid component is an adipic acid or a sebacic acid, the monoalcohol is 2-ethylhexanol, and the monocarboxylic acid is an acetic acid. In the formula (I), a ratio (k / p) is 70 / 30 to 99 / 1.SELECTED DRAWING: None

The invention relates to a potassium type neutralization regulation and control method in a sebacic acid fermentation process and application, a potassium hydroxide solution is used as a neutralizer, sebacic acid generated by microorganisms is neutralized in situ in the fermentation process, a product is accumulated in a high-solubility sylvite form, and the problem of sodion pollution caused by use of sodium hydroxide in a traditional process is avoided. The method comprises the core steps of strain activation, seed solution preparation, fermentation culture medium preparation, fermentation starting, pH dynamic regulation and control and product extraction. By automatically controlling the pH value to be 4.5-6.8, a 20-40% potassium hydroxide solution is fed, so that the fermentation acid production concentration reaches 180g / L or above. A potassium sulfate byproduct which is easy to dissolve in water is generated through subsequent acidification and crystallization, efficient separation can be achieved through washing, and a low-sodium / sodium-free high-purity sebacic acid product is obtained. According to the method, potassium ions are used as necessary elements for microbial growth to optimize a metabolic environment, so that the viscosity of fermentation liquor is remarkably reduced, dissolved oxygen transfer is improved, the environmental protection pressure of downstream extraction is relieved, and the production efficiency and the product quality are improved.

The invention provides a preparation method of sebacic acid, which comprises the following steps: in the presence of 1-3 parts of alkali, heating 1 part of reactant from castor oil, and reacting to generate a material flow A containing sebacate and hydrogen; gas-solid separation is carried out on the material flow A to generate a material flow B containing hydrogen and a material flow C containing sebacate, and the material flow B enters a hydrogen energy utilization system; the material flow B enters a heating device through a buffer device to burn the hydrogen; the method comprises the following steps: firstly, adding acid into the material flow C for treatment, acidifying until the pH value is 5-7, then separating by adsorption, acidifying until the pH value is 1-3, and carrying out solid-liquid separation to obtain sebacic acid. According to the invention, the sebacic acid production cost is reduced. By means of combination and cooperation of a plurality of hydrogen recovery steps and system components, safe and reliable recovery and utilization of hydrogen can be achieved even under the condition that the hydrogen production flow changes along with time.

The invention provides a hydrogen energy comprehensive utilization system in a sebacic acid preparation process. The hydrogen energy comprehensive utilization system comprises a cooler, a switching system, a pressure stabilization control system, a buffer tank, a cracking device and a heating device which are communicated in sequence. According to the hydrogen energy comprehensive utilization system, the high calorific value of hydrogen is allowed to be utilized, so that dependence on external fuel is reduced, and the production cost is reduced.

The present invention discloses a method for determining the content of diethyl hexyl sebacate in polyvinyl acetate. The method comprises the following steps: (1) adding a dissolving solvent to a pretreated polyvinyl acetate sample, and after the sample is completely dissolved, adding a main precipitant dropwise to the solution until no polymer continues to precipitate, then adding a co-precipitant dropwise until the precipitation is complete, and constant volume with the co-precipitant as a test solution, wherein the co-precipitant is selected from one of isopropanol, water and heptane; (2) preparing a standard working solution; (3) performing gas chromatography-mass spectrometry analysis on the standard working solution and the test solution. The assay method proposed by the present invention can meet higher detection requirements, such as reducing the detection limit, and the method also has the advantages of being simple to operate and fast, and has a very wide range of application prospects.