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291 results about "Crotonaldehyde" patented technology
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Crotonaldehyde is a chemical compound with the formula CH₃CH=CHCHO. The compound is usually sold as a mixture of the E- and Z-isomers, which differ with respect to the relative position of the methyl and formyl groups. The E-isomer is more common (data given in Table is for the E-isomer). This lachrymatory liquid is moderately soluble in water and miscible in organic solvents. As an unsaturated aldehyde, crotonaldehyde is a versatile intermediate in organic synthesis. It occurs in a variety of foodstuffs, e.g. soybean oils.
Additive agent selectively reducing aldehydes matter in cigarette flue gas, production method and application thereof
ActiveCN101194755AReduce the amount of adsorptionExtended reaction timeTobacco smoke filtersPigment treatment with non-polymer organic compoundsCrotonaldehydeChemical compound
The invention discloses an additive to selectively lower the aldehydes substances in cigarette smoke, which uses the silica gel with thick holes as the carrier and introduces the functional group through modification to coat a layer of chemical compounds provided with amidogen, carbamido or amide and capable of reacting with aldehydes substances on the carrier surface and the hole channel surface, wherein the modified carrier is applied in the cigarette filter up and can selectively lower the contents of the aldehyde substances in the cigarette smoke, such as formaldehyde, aldehyde, propanal, acrylic aldehyde, crotonaldehyde and the like.
Owner:CHINA TOBACCO HUNAN INDAL CORP
Kudzuvine root porous particles and application thereof to cigarettes
ActiveCN103689801AUniform sizeStable physical and chemical propertiesTobacco smoke filtersCrotonaldehydeOperability
The invention discloses kudzuvine root porous particles and application thereof to cigarettes. The kudzuvine root porous particles of 20-60 meshes are prepared by taking kudzuvine root powder of which the water content is 5-6 percent and the particle diameter is 100-160 meshes as raw materials and taking one or more of gelatin, polyvinylpyrrolidone and sodium carboxymethyl starch as bonding agents with a fluidized bed top spray process. The particles are rough in surfaces and are large in specific surface areas, the effective contact area between a particle material and cigarette smoke is increased remarkably, and hydrocyanic acid and crotonaldehyde in cigarette smoke can be adsorbed selectively; the irritation of the cigarette smoke is effectively lowered, and remaining taste is improved; meanwhile, the effect of improving the sweet taste of smoke is enhanced. The kudzuvine root porous particles and the application thereof to the cigarettes have the advantages of simple production process, high operability, high standardability, ready availability of raw materials, low cost, convenience in the realization of industrial production and good application prospect.
Owner:HONGYUN HONGHE TOBACCO (GRP) CO LTD
Method for synthesizing cosmetic-grade 1,3-butanediol
ActiveCN105585448ACondensation reaction is mildReduced risk of deep condensationOrganic compound preparationHydroxy compound preparationCrotonaldehydeDistillation
The invention relates to a method for synthesizing cosmetic-grade 1,3-butanediol. The method includes the steps that acetaldehyde and water are mixed evenly and then injected into a reaction kettle, and dilute acetic acid is dripped under the alkaline condition so that the reaction system can be neutralized to be neutral; flashing is carried out, acetaldehyde obtained in distillation is recycled, and distillation residual liquid is 3-hydroxybutanal; obtained 3-hydroxybutanal and a catalyst are mixed evenly, hydrogen pressure is kept, centrifugal separation is carried out on the obtained product to obtain the catalyst for recycling, flashing is carried out on the liquor at 120 DEG C to obtain water and the byproducts ethyl alcohol and crotonaldehyde, and reduced pressure distillation is carried out to obtain coarse 1,3-butanediol; purification is carried out. The process of synthesizing 1,3-butanediol through condensation and hydrogenation reduction of an acetaldehyde liquid phase is improved through the steps, and thus the product 1,3-butanediol meets the quality requirement of the cosmetic industry.
Owner:LIAONING KELONG FINE CHEM
Process for preparing sorbic acid from sorbic acid polyester
InactiveUS20030065218A1High yieldReduce usageOrganic compound preparationPreparation from carboxylic acid esters/lactonesPolyesterCrotonaldehyde
The invention relates to a process for preparing sorbic acid by cleaving the sorbic acid polyester prepared from crotonaldehyde and ketene, the sorbic acid polyester being distilled and the cleavage being catalyzed by an amine, which comprises separating off the amine from the distillation residue by distillation under reduced pressure and at a temperature which is higher than the temperature of the polyester distillation and recovering it.
Owner:NUTRINOVA NUTRITION SPECIALTIES & FOOD ENGREDIENTS GMBH
Method for measuring main carbonyl compounds in main stream smoke of cigarette through ultra high performance convergence chromatography
ActiveCN103698458AShort detection timeReduce consumptionComponent separationCrotonaldehydeDerivatization
Owner:CHINA NAT TOBACCO QUALITY SUPERVISION & TEST CENT
Method for detecting eight volatile carbonyl compounds in cigarette filter tip through liquid chromatography-tandem mass spectrometry
ActiveCN103163270AHigh sensitivityEfficient exclusionComponent separationCrotonaldehydeVapor phase chromatography
The invention relates to a method for detecting eight volatile carbonyl compounds in a filter tip through liquid chromatography-tandem mass spectrometry. The eight volatile carbonyl compounds are formaldehyde, acetaldehyde, propanal, acetone, acraldehyde, crotonaldehyde, butanal and 2-butanone. The method comprises the following steps: performing ultrasonic extraction on the carbonyl compounds in a filter tip by using an acetonitrile / water mixed solution, performing 2,4-dinitrophenylhydrazine derivatization reaction, and analyzing through a liquid chromatography-tandem mass spectrometer (LC-MS / MS). Compared with the original gas chromatography, the LC-MS / MS method used in the method has the following advantages: (1) the LC-MS / MS method is higher in sensitivity, and the two-stage mass spectrometry can more effectively eliminate the false positive result, thus ensuring that the qualitative analysis accuracy is higher; (2) separation is performed through liquid chromatography, and 2,4-dinitrophenylhydrazone of the carbonyl compounds has favorable stability; (3) the sample does not need to be purified, and the pretreatment is simple and efficient; and (4) the method can realize the simultaneous detection of the eight volatile carbonyl compounds.
Owner:ZHENGZHOU TOBACCO RES INST OF CNTC
Papery filter tip for reducing aldehydes material in smoke of cigarette and preparation method thereof
The invention relates to a paper filter tip capable of reducing aldehydes in cigarette smoke gas and a preparation method thereof. The paper filter tip capable of reducing aldehydes in cigarette smoke gas adopts the paper containing one or a plurality of wood pulp fibers or jute pulp fibers. The paper undergoes a coating process. Through the high water absorption of the paper, compound solution containing amino groups are coated onto the paper; and after drying, cutting and embossing, the paper filter tip is prepared by the paper through a filter tip forming machine. The paper filter tip can effectively reduce formaldehyde by 15 to 40 percent, acetaldehyde by 10 to 25 percent, acrolein by 15 to 30 percent and crotonaldehyde by 10 to 20 percent in cigarette smoke gas.
Owner:CHINA TOBACCO HUNAN INDAL CORP
Method for measuring main carbonyl compounds in cigarette filter through ultra-performance convergence chromatography
ActiveCN103675153AShort detection timeReduce consumptionComponent separationCrotonaldehydeCigarette filter
Owner:CHINA NAT TOBACCO QUALITY SUPERVISION & TEST CENT
5-hydroxy coumarin and pyranoid type coumarin compounds, synthesizing method and use
InactiveCN101497593ANovel structureStrong anti-breast cancer cell MCF-7 effectOrganic chemistryAntineoplastic agentsIc50 valuesCrotonaldehyde
The invention relates to a compound of 5-hydroxycoumarin and pyranocoumarin and synthesis and application thereof. The compound has a structural formula I or II; during preparation, according to the mol portion, under the catalytic action of 2 to 6 portions of SO2-OSO3H(silicon sulfonic acid), 1 to 3 portions of 5-iodine-1 and 3-dihydroxyhenzene and 1 to 3 portions of RCOCH2COOCH2CH3 are condensed to obtain the compound of which the structural formula is iodo-5-hydroxycoumarin; 1 to 4 portions of compound of iodo-5-hydroxycoumarin and 2 to 8 portions of 3-methyl-2-crotonaldehyde or 3-chloro-3-methylbutyne are reacted to generate a compound of iodo-pyranocoumarin; and finally, by coupled reaction, the coumarin compound with the structural formula I or II is generated. The IC50 value of the compound on breast cancer cells MCF-7 reaches 3.3 to 18.3, so that the compound can strongly inhibit the breast cancer cells MCF-7.
Owner:SOUTH CHINA UNIV OF TECH
Preparation method and application of nanofiber membrane-modified cellulose molding paper
ActiveCN103625089AUniform thicknessSpecial pore structureSynthetic resin layered productsTobacco smoke filtersCrotonaldehydeNanofiber
The invention discloses a preparation method and application of nanofiber membrane-modified cellulose molding paper. The preparation method comprises the following steps: dissolving polymer raw materials into a solvent to prepare a spinning solution, and putting the spinning solution into a liquid storage device; after regulating the electrostatic spinning voltage, continuously feeding the spinning solution in the liquid storage device to a spinning nozzle connected with the liquid storage device through a micro pump; spraying the spinning solution to the surface of a continuously-moving normal cellulose molding paper matrix through the spinning nozzle so as to form a nanofiber membrane, namely the nanofiber membrane-modified cellulose molding paper. The preparation method is simple and can be applied to continuous industrial production; the prepared nanofiber membrane-modified cellulose molding paper can be applied to the preparation of cigarette groove filter sticks which does not influence the smoking quality of cigarettes and can effectively reduce the release amount of crotonaldehyde and NH3 in the main stream smoke of the cigarettes.
Owner:CHINA TOBACCO HUNAN INDAL CORP
Dual catalyst system for the self-condensation of alcohols
ActiveUS20140088326A1Preparation from carboxylic acid saltsOrganic compound preparationCrotonaldehydeAlcohol
Disclosed is a process for the production of higher aldehydes from lower alcohols using a two-stage vapor phase heterogeneous catalyst system. Ethanol feeds afford aldehydes such as butyraldehyde and crotonaldehyde while butanol feeds yield 2-ethylhexanal and 2-ethylhexenal. Higher product selectivities are obtained when the alcohol is first dehydrogenated in the upper catalyst stage followed by aldol condensation of the resulting lower aldehyde to a higher aldehyde.
Owner:EASTMAN CHEM CO
Filter tip capable of reducing releasing amount of harmful ingredients of mainstream cigarette smoke
InactiveCN102511928AReduce releaseThe effect of reducing focus and harm is obviousTobacco smoke filtersCrotonaldehydeTio2 nanotube
The invention discloses a filter tip capable of reducing the releasing amount of harmful ingredients of mainstream cigarette smoke. The filter tip comprises a titanium dioxide nano tube additive, wherein the content of an additive in each filter tip is 10-30 mg; the pore diameter of a titanium dioxide nano tube is in a range of 1.5-30 nm. The titanium dioxide nano tube additive is a compound of one or more than two of the titanium dioxide nano tube, a cuprous oxide coped titanium dioxide nano tube, an iron oxide doped titanium dioxide nano tube, an aluminum doped titanium dioxide nano tube, a zirconium doped titanium dioxide nano tube and a boron doped titanium dioxide nano tube according to any ratio. With the adoption of the filter tip, the releasing amount of the harmful ingredients including hydrocyanic acid, benzopyrene, phenol, crotonaldehyde, ammonia and NNK (nitrosamine) in the mainstream smoke can be reduced by more than 30%.
Owner:CHINA TOBACCO ANHUI IND CO LTD
Pure polylactic acid tows as well as preparation method and cigarette filter trip thereof
InactiveCN103088458AAvoid potential hazardsCompensation for pressure dropTobacco smoke filtersArtificial filament washing/dryingPolymer scienceCrotonaldehyde
Owner:彭荣淮
Removing permanganate-reducing impurities from acetic acid
ActiveUS7208625B1Organic compound preparationCarboxylic compound separation/purificationAcetic acidCrotonaldehyde
A method for removing permanganate-reducing impurities from an acetic acid product is disclosed. The method comprises contacting an acetic acid product containing permanganate-reducing impurities with peracetic acid and an oxygen-containing gas. The method is particularly suitable for post treatment of acetic acid that contains permanganate-reducing impurities such as crotonaldehyde.
Owner:LYONDELLBASELL ACETYLS
Processing method of cigarettes with low crotonaldehyde content
The invention relates to a processing method of cigarettes with low crotonaldehyde content, and the specific process parameters of the main process steps are as follows: 1) the microwave loosening process step: the microwave power is 136KW, and the processing time is 320s; 2) the loosening and conditioning process step: the steam pressure of a steam and water nozzle is 0.3MPa, the temperature of return air is 48 DEG C, and the rotational speed of a cylinder body is 9r / min; 3) the HT and cut tobacco drying process step: the HT working steam pressure is 0.60MPa, the temperature of hot air is 85 DEG C, the opening degree of a moist air removing door is 53%, the opening degree of a hot air door is 70%, and the rotational speed of the cylinder body is 9r / min; and the HT is the cut tobacco temperature-increasing and moisture-increasing process step which is carried out by adopting a tunnel type cut tobacco temperature-increasing and moisture-increasing machine. The processing method can effectively reduce the content of crotonaldehyde in smoke gas of the prepared cigarette products through optimal combination of process parameters of the existing process steps.
Owner:CHINA TOBACCO CHUANYU IND
Sulfite ratiometric fluorescence probe and preparation method thereof
InactiveCN105112049AEasy to synthesizeLow costOrganic chemistryFluorescence/phosphorescenceCrotonaldehydeIodide
The invention belongs to the technical field of chemical analysis detection, and particularly relates to a sulfite ratiometric fluorescence probe and a preparation method thereof. The molecular structural formula of the sulfite ratiometric fluorescence probe refers to description. The preparation method of the sulfite ratiometric fluorescence probe includes the following steps: reacting N1,N1 dimethyl benzene-1,4-diamine with crotonaldehyde to obtain N,N,2-trimethylquinoline-6-amine; reacting N,N,2-trimethylquinoline-6-amine with selenium dioxide to obtain 6-(dimethylamino) quinoline-2-formaldehyde; reacting 2,3,3-trimethylindoline with iodomethane to obtain 1,2,3,3-tetramethyl-3H-indoliu iodide; reacting 6-(dimethylamino) quinoline-2-formaldehyde and 1,2,3,3-tetramethyl-3H-indoliu iodide with piperidine to obtain the probe. According to the invention, molecular synthesis of the probe is simple, the cost is relatively low, the selectivity to sulfite is good, the preparation method is simple, raw materials are cheap and easy to obtain, and the method is easy to realize.
Owner:SHANDONG UNIV OF TECH
Catalyst for producing crotonaldehyde
InactiveCN101462044ANo corrosionShort processMolecular sieve catalystsOrganic compound preparationCrotonaldehydeAlkali metal oxide
The invention provides a catalyst for producing crotonaldehyde, which takes a complex consisting of alkaline earth metal oxide and a molecular sieve or alumina as a carrier, and is prepared by supporting alkaline metal oxide by adopting an impregnation method. Alkaline earth metal is magnesium, calcium or barium, the molecular sieve is an HZSM-5, Hbeta, HY, USY or rare earth Y(ReY) molecular sieve, the alumina is gamma-Al2O3, and alkaline metal is lithium, sodium, potassium or cesium. The mass ratio of the alkaline earth metal oxide and the molecular sieve or the alumina which are taken as the carrier of the catalyst is 1: 20-20: 1, and the mass of the alkaline metal oxide is 1 to 30 percent of the total mass of the complex consisting of the alkaline earth metal oxide and the molecular sieve or the alumina. Compared with a solid catalyst reported by literature, the catalyst has better low-temperature activity, namely the reaction temperature is lower than that of the catalyst reported by literature when the conversion rate of acetaldehyde is equivalent to the selectivity of the crotonaldehyde. The method also additionally produces tolyl aldehyde with higher added value when synthesizing a main product, namely the crotonaldehyde, and further promotes the economic benefit of the catalyst.
Owner:SINOPEC YANGZI PETROCHEM
PDGA resin and preparation method and application thereof
ActiveCN105273118AEfficient removalReduced HCN releaseTobacco smoke filtersCrotonaldehydeGlycidyl methacrylate
The present invention belongs to the field of cigarette harm reduction addition materials, and relates to a PDGA resin and a preparation method and application thereof. The PDGA resin is prepared by amination after copolymerization of divinylbenzene and glycidyl methacrylate (GMA) The resin regulates resin skeleton polarity on the one hand, and on the other hand the resin amination reaction is simplified due to the good reaction ability of epoxy functional groups, so that the synthetic resin both has a porous weakly polar skeleton and high content amine functional groups, a variety of harmful substances such as HCN, aldehydes and phenols and the like in cigarettes can be simultaneously removed, HCN emission maximum decreasing range is nearly 65%, formaldehyde emission maximum decreasing range is 81%, acetaldehyde emission maximum decreasing range is 42%, acrolein emission maximum decreasing range is 52%, crotonaldehyde emission maximum decreasing range is 44%, phenol emission maximum decreasing range is 24%, the resin synthesis process is simple, and the resin is suitable for large-scale industrial production, and has a good practical application prospect in selective removal of harmful substances in cigarette smoke.
Owner:NANTONG CELLULOSE FIBERS CO LTD
Method for synthesizing crotonic acid by oxidizing croton aldehyde selectively
InactiveCN101003472AEasy to manufactureLow costPhysical/chemical process catalystsOrganic compound preparationPhosphomolybdic acidCrotonaldehyde
This invention relates to a method for synthesizing crotonic acid by selective oxidation of crotonaldehyde. The method adopts crotonaldehyde as the raw material, acetone, acetic acid, benzene or toluene as the solvent, phosphomolybdic acid as the main catalyst, and V2O5 as the cocatalyst, and reacts at 30-100 deg.C and 0.3-0.9 MPa in the presence of O2 to obtain crotonic acid. Phosphomolybdic acid can be supported by such carriers as active carbon, SiO2, gamma-Al2O3 or molecular sieve. Therefore, the catalyst can be separated from the reaction solution by filtration, and dried in air at 120 deg.C for recycling. The supported catalyst has such advantages as simple preparation, high catalytic activity, high selectivity, and high stability, and can be used repeatedly.
Owner:SINOPEC YANGZI PETROCHEM
Method for detecting volatility carbonyl compound in cigarette filter tip with solid phase extraction capillary gas chromatography
InactiveCN101113973AStrong costLow costComponent separationCrotonaldehydeCapillary gas chromatography
The invention relates to a method of detecting evaporable carbonyl compounds in cigarette filters by the solid-phase extraction and capillary gas chromatography. The cigarette filter is added with the Hydrochloric acidified 2,4-dinitrophenylhydrazine solution, for vibrating and extracting, then the extracted liquid is moved to C18 solid phase extraction columnella, eluted by cyclohexane, and the elutriant analyzed by GC, DB-5MS capillary chromato bar is adopted. The volume of sample injection is 1MuL. N2 is used as carrier gas in splitless sample injection. The flow rate of carrier gas is 1-2.5mL / min and the temperature of injection port is 200-250 DEG C. FID detector and the temperature of detector is 250 DEG C. The heating process is to keep initial temperature at 100 DEG C for 0-1min and heating rate at 15-20 DEG C / min, to 200 DEG C for 5min, then the heat rate from 4-8 DEG C / min, heating to 250 DEG C, keeps the temperature under 250 DEG C for 10min, quantitative analysis is according to the peak area. The invention lowers the operation request and can eliminate interference of nontaget compound which can separate formaldehyde, butanone, acrolein, crotonaldehyde, n-butylaldehyde, acetone, acetaldehyde from the cigarette filters effectively and quantitative analysis the seven evaporable carbonyl compounds in the cigarette filter accurately.
Owner:CHINA TOBACCO HUNAN INDAL CORP
Preparation method of 5-amino-2-methyl quinoline
The invention relates to a preparation method of pharmaceutical intermediate 5-amino-2-methyl quinoline. The method is as follows: cyclizing o-chloroaniline and crotonaldehyde under the action of Lewis acid to obtain chinoline rings, carrying out 5-site nitrification on the chinoline rings, reducing by iron powder, and carrying out hydrogenation reduction by 5% palladium carbon to finally obtain the target compound 5-amino-2-methyl quinoline with high purity. The preparation method has the advantages of simple process, mild reaction conditions, low cost and simple post treatment and is applicable to industrial production, and the obtained products have high yield, high purity and stable quality, therefore 5-amino-2-methyl quinoline completely conforms to the using requirement when serving as pharmaceutical intermediate.
Owner:ZHEJIANG QIMING BIOCHEM TECH
Cigarette paper additive for reducing harmful ingredients of cigarette mainstream smoke and application thereof
ActiveCN102839565AKeep the styleMaintain suction qualityNon-fibrous pulp additionNatural cellulose pulp/paperFiberCombustion
The invention relates to a cigarette paper additive for reducing harmful ingredients of cigarette mainstream smoke. The cigarette paper additive is prepared by the following components in percentage by weight: 5-20% of tobacco extract, 5-20% of tea extract, 10-30% of air permeability regulator and 30-60% of efficient combustion improver. The cigarette paper additive for reducing harmful ingredients of cigarette mainstream smoke majors in tobacco fiber cigarette paper; after the additive is applied to the cigarette, at least four harmful ingredients in seven harmful ingredients, such as CO, HCN, NNK, NH3, benzo [a] pyrene, phenol and crotonaldehyde of the cigarette can be obviously reduced; decreasing amplitude is above 10%; and the decreasing amplitude of an H value of cigarette hazardous index is above 5%.
Owner:CHINA TOBACCO GUANGDONG IND +1
Blow molded container, fuel container, and method for producing blow molded container
ActiveUS20150041462A1Sufficient gas barrier propertySufficient oil resistanceBottlesSynthetic resin layered productsCrotonaldehydeOrganic chemistry
A blow molded container including (A) a layer containing an ethylene-vinyl alcohol copolymer as a principal component, in which the layer (A) contains an unsaturated aldehyde, and the content of the unsaturated aldehyde in the layer (A) is 0.01 ppm or more and 100 ppm or less. The unsaturated aldehyde (II) is preferably an unsaturated aliphatic aldehyde. The unsaturated aldehyde (II) is preferably at least one selected from the group consisting of crotonaldehyde, 2,4-hexadienal and 2,4,6-octatrienal. The layer (A) preferably contains a conjugated polyene compound, and the content of the conjugated polyene compound in the layer (A) is preferably 0.01 ppm or more and 1,000 ppm or less.
Owner:KURARAY CO LTD
Filter tip addition agent for selectively reducing crotonaldehyde in smoke of cigarette and preparing method and application thereof
ActiveCN104720104ASimple preparation processMaintain inner qualityTobacco smoke filtersPolyelectrolyteCrotonaldehyde
The invention relates to a filter tip addition agent for selectively reducing crotonaldehyde in smoke of a cigarette and a preparing method and application thereof. The addition agent is a composite material with polyelectrolyte nano particles loaded on the surface of a porous material. Each polyelectrolyte nano particle is a complex of chitosan hydrochloride and sodium alginate. The mass percentage composition of the polyelectrolyte nano particles in the composite material is 0.1-10.0%. According to a cigarette filter tap prepared through the addition agent, by means of the special structure of loading the nano particles on the porous material of the addition agent and functional groups of the loaded polyelectrolyte nano particles, the release amount of the crotonaldehyde in the smoke of the cigarette can be effectively and selectively reduced. In comparison with a cigarette, sold in the market, of the same specification, the cigarette tip prepared through the composite material enables the release amount of the crotonaldehyde in the smoke of the cigarette to be selectively reduced by 20-70%, fragrance ingredient loss can be avoided, and the inherent quality of the cigarette is kept.
Owner:CHINA TOBACCO ZHEJIANG IND
Method for quickly measuring harmful ingredients in main stream smoke of cigarette
InactiveCN105866351ARapid determinationThe detection method is simpleMaterial analysisCrotonaldehydeIon chromatography
The invention discloses a method for quickly measuring harmful ingredients in main stream smoke of a cigarette. According to the method, solvent gathering and filter disc gathering are adopted on a smoking machine at the same time, carbon monoxide is detected through a non-scattering infrared detection on the smoking machine, a solvent is used for gathering ammonia, hydrogen cyanide and crotonaldehyde, a filter disc is used for gathering NNK, ammonia, hydrogen cyanide and phenol, and after being collected, samples are detected through efficient high oerformance liquid chromatography, ion chromatography and a liquid chromatogram / gas chromatograph-mass spectrometer. The method integrates six tobacco industry standard methods for harmful ingredient detection in smoke of the cigarette, operation is easy and convenient, the analysis procedure is simplified, the analysis step of repeatedly smoking the cigarette is avoided, precision is good, and the method is suitable for measuring the content of the harmful ingredients in the main stream smoke of the cigarette.
Owner:CHINA TOBACCO ANHUI IND CO LTD
Method for synthesizing crotonic acid by using byproduct of croton aldehyde
InactiveCN101003473AIncrease valuePromote cleaner productionPhysical/chemical process catalystsOrganic compound preparationPhosphomolybdic acidCrotonaldehyde
This invention relates to a method for synthesizing crotonic acid from crotonaldehyde byproduct. The method comprises: distilling 20-40% crotonaldehyde byproduct by controlling the boiling point of the distillate on the top of the column at 25-65 deg.C to remove light components and obtain 45-60% crotonaldehyde in the solution in distillation kettle, adopting the solution in distillation kettle as the raw material, acetone, acetic acid, benzene or toluene as the solvent, phosphomolybdic acid as the main catalyst, and V2O5 as the cocatalyst, and reacting at 30-100 deg.C and 0.3-0.9 MPa in the presence of O2, separating the catalyst, distilling to remove the solvent, and recrystallizing with deionized water for twice to obtain crotonic acid with a purity higher than 99%. Phosphomolybdic acid can be supported by such carriers as active carbon, SiO2, gamma-Al2O3 or molecular sieve. Therefore, the catalyst can be separated from the reaction solution by filtration, and dried in air at 120 deg.C for recycling. The method has such advantages as simple process and high crotonic acid yield.
Owner:SINOPEC YANGZI PETROCHEM
Method for preparing crotonic acid
InactiveCN1415594AHigh yieldShort oxidation timeCarboxylic preparation by oxidationCrotonaldehydeMetal
A process for preparing crotonic acid features that under the catalysis of silver powder as catalyst, the crotonaldehyde is oxidized in oxidizing tower to obtain crotonic acid. Its advantages are high output rate and short reaction time.
Owner:JIANGSU PANOXI CHEM
1,3-butanediol synthesis method and system
ActiveCN108383684AImprove stabilityReduce generationOrganic compound preparationHydroxy compound separation/purificationCrotonaldehydeDistillation
The invention discloses a 1,3-butanediol synthesis method and system. For the synthesis method, 1,3-butanediol is produced from acetaldehyde by a 2,6-dimethyl-1,3-dioxane-4-alcohol route; the stability of the intermediate product is improved; the selectivity of the 1,3-butanediol is improved; the generation of harmful, easy-color-developing and smelly crotonaldehyde and derivatives is reduced. Meanwhile, a tubular reactor with a built-in component is used as a condensation reactor; the heat can be effectively removed; the low-temperature cooling load is reduced; the reaction controllability isimproved; the unnecessary backmixing is reduced; the generation of by-products is reduced. The 2,6-dimethyl-1,3-dioxane-4-alcohol pyrolysis is performed in a mode of firstly performing low-temperature flash evaporation and then performing catalytic reaction distillation; the acetaldehyde is recovered; the raw material utilization rate is effectively improved; the yield of the final product is improved; the chromaticity and the odor can meet the requirements of most high-level application.
Owner:LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Method for determining eight carbonyl compounds in heating non-combustible cigarette main flue gas
ActiveCN107490636AThe assay method is fast and efficientHigh sensitivityComponent separationCrotonaldehydeRelative standard deviation
The invention relates to a method for determining eight carbonyl compounds in heating non-combustible cigarette main flue gas, which belongs to the technical field of physical and chemical examination of cigarette main flue gas. The method comprises the following steps: extracting a filter disc used for capturing eight carbonyl compounds in the heating non-combustible cigarette main flue gas by employing a pyridine acetonitrile solution to obtain an extract, using high performance liquid chromatography-tandem mass spectrum for determination, and performing quantification by an internal standard method; wherein the carbonyl compounds are formaldehyde, acetaldehyde, acetone, acrolein, propionaldehyde, crotonaldehyde, 2-butanone, and butyraldehyde. The determination method is rapid and effective, and has the advantages of high sensitivity and low detection limit, average relative standard deviation is less than 6.7%, and the average recovery rate of the index is between 83.5% and 90.5%.
Owner:CHINA NAT TOBACCO QUALITY SUPERVISION & TEST CENT
Application of cross-linked chitosan porous microspheres in cigarette filter tips
The invention relates to the application of cross-linked chitosan porous microspheres in cigarette filter tips. During the filter stick forming process, the cross-linked chitosan porous microspheres are uniformly sprayed into tobacco shreds, paper filter elements or non-woven filter cloth or added into the cavities of three-element hollow filter sticks. The cross-linked chitosan porous microspheres are porous spherical particles with a specific surface area of 35-300 m2 / g. The microspheres particle size distribution range of the cross-linked chitosan porous microsphere is 10-500 Mum, and the pore size is 5-100 nm. The additional amount of the cross-linked chitosan porous microspheres is 10-260 mg / cigarette. The volume of natural stack of the cross-linked chitosan porous microspheres is 0.6-3.0 cm3 / g. the cross-linked chitosan porous microspheres provided by the invention can satisfy the need for filter stick forming process. The release of crotonaldehyde in the main stream smoke of cigarettes can be effectively reduced by adding the cross-linked chitosan porous microspheres into the filter sticks.
Owner:CHINA TOBACCO FUJIAN IND +1
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