290 results about "Crotonaldehyde" patented technology

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.

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.

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.

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.

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.

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.

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%.

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.

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.

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.

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.

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.

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%.

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.

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.

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.

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.

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.

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%.

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.