55 results about "Dimethyl trisulfide" patented technology

The invention belongs to the technical field of natural environment water quality monitoring and discloses a method for determining eight kinds of common odorous substances in water simultaneously through use of a method of combining purge-and-trap and gas chromatography/mass spectrometry. The method can be adopted to determine eight kinds of common odorous substances such as dimethyl sulfide (DMS), dimethyl trisulfide (DMTS), 2-isopropyl-3-methoxy pyrazine (IPMP), 2-isobutyl-3-methoxy pyrazine (IBMP), 2-methyl isobornyl (MIB), beta-cyclocitral, geosmin (GSM) and beta-ionone in water simultaneously. Any report on the method for determining the eight kinds of substances in one step is not present yet. The method disclosed by the invention fills the gap and can be used for quantitatively analyzing the eight kinds of odorous substances in water in one step, so that the detection efficiency is greatly increased.

The invention discloses a method for continuously producing dimethyl disulfide. The method is characterized in that after being molten, a material sulfur is fed into a dimethyl trisulfide reactor by virtue of a feeding pump so as to react with recycled dimethyl disulfide to generate dimethyl trisulfide; dimethyl trisulfide and methyl mercaptan are feed into a dimethyl disulfide reactor so as to react to generate dimethyl disulfide; a dimethyl disulfide crude product is fed into a separating tank, so that most of hydrogen sulfide is separated out, a liquid-phase product is fed into a rectifying tower, a dimethyl disulfide product is condensed and recycled at a tower top, hydrogen sulfide is exhausted as a non-condensable gas, and the dimethyl disulfide and dimethyl trisulfide in a tower kettle are returned and recycled. A method of enabling dimethyl trisulfide to be excessive is adopted, so that methyl mercaptan is completely converted, separating requirements are lowered and a separating process is simplified, and therefore, not only can the dimethyl disulfide yield be improved to 90%, but also the product purity is up to 99wt%.

The invention belongs to the technical field of soy sauce production, and specifically relates to a preparation method of mellow-aroma dark soy sauce. The preparation method of the mellow-aroma dark soy sauce comprises the followings steps: (1) preparing raw materials, and carrying out treatment; (2) preparing koji; (3) carrying out fermentation; (4) carrying out squeezing; (5) carrying out firststerilization; (6) improving aroma, namely adding burnt sugar coloring into crude soy sauce sterilized in the step (5), adjusting salt content, adjusting pH value to 4.0-5.0, carrying out heating in asealed jar until the temperature reaches 60-70 DEG C, carrying out maintaining for a predetermined period, carrying out natural cooling, and carrying out storing for 4-12 months; (7) carrying out blending; and (8) carrying out second sterilization. Compared with dark soy sauce prepared by conventional methods, the dark soy sauce prepared by the preparation method has significantly increased contents of 4-ethyl guaiacol, dimethyltrisulfide, 4-ethylphenol, phenethyl alcohol and 3-methional; and thus, the dark soy sauce is mellow in aroma, significantly improved in sauce-flavor, and greatly increased in soy sauce flavor.

The invention relates to a chicken oily essence, which consists of the following components: 2-methyl-3-furanthiol, bis(2-methyl-3-furanthiol), 1,6-hexanedithiol , furanone, dimethyl trisulfide, 2-methylpyrazine, 2,3,5-trimethylpyrazine, 2,5-dimethyl-3-furanthiol, 3-methylthiopropanal , 4-methyl-5-hydroxyethylthiazole, 2,6-dimethylpyrazine, 2,4-decadienal, 2,4-nonadienal, furfuryl mercaptan, 1-octene- 3-Keto, distilled ginger oil, clove oil, 2-acetylfuran, nonanal, 4-ethylguaiacol, soy sauce ketone, 3-methylthiopropanol, trans-2-hexenal, 3- Methyl-2-butanone and soybean oil. The final formulated essence has a strong chicken flavor, can provide good chicken aroma and fragrance to soybean products, and has good aroma and fragrance stability.

The present invention is asafetida extract and its pharmaceutical use, and aims at eliminating offensive odor of asafetida and providing one new use. The asafetida extract contains alpha-terpinene, 2-borneol, terpine tetraol, D-fenchol, pinocarveol, etc. and is extracted via conventional process. The asafetida extract is used in preparing drug addiction stopping medicine, and the medicine may be injection, capsule, tablet or granule.

The invention discloses a method for detecting dimethyl trisulfide in beer. The method comprises the following steps of 1, an apparatus connection process, 2, an apparatus parameter arrangement process, 3, a standard curve drawing process comprising preparing dimethyl trisulfide having a concentration of 99% into a standard solution having a concentration of 5mg/L, adding 40 microliters of the standard solution, 80 microliters of the standard solution, 120 microliters of the standard solution, 160 microliters of the standard solution, 200 microliters of the standard solution and 240 microliters of the standard solution respectively into 40mL of beer, putting the beer with the standard solution on a sample disk of a purge-trap automatic sampler, carrying out detection by an apparatus, and drawing a standard curve with concentration values as horizontal coordinates and peak areas as vertical coordinates, and 4, a beer sample detection process comprising putting 40ml of a beer sample to be detected into a container having an appropriate volume, adding 0.5ml of a chemical defoamer (diluted with water according to a ratio of the chemical defoamer to water of 1: 5), uniformly mixing, putting the beer sample on the sample disk of the purge-trap automatic sampler, carrying out detection analysis by the apparatus, and calculating dimethyl trisulfide content of the beer sample according to the standard curve. The method realizes detection of dimethyl trisulfide in beer and further promotes the improvement of beer quality.

The invention relates to a method for using asafetida to prepare the anti-tumor drug, which can be injection, capsule, tablet, or the like. The asafetida benzene mainly comprises a-firpene, a-terpinenes, terpin 4-alochol, pinocarveol, 2-bornyl alcohol, dimethyl disulfide, dimethyl trisulfide, N, N-thioformamide, and allyl-butyl-bisulfide. The invention uses general method to extract the asafetida benzene, as the gel resin of XinJiang asafetida or FuKang asafetida, or the like.

Dimethyl trisulfide (DMTS) antidote compositions may be used to as a cyanide poisoning antidote.

The invention is the application of resina ferulae volatile oil in preparing an anti-cancer preparation, relates to pharmaceutical uses of resina ferulae volatile oil of Chinese medicine and resina ferulae volatile oil abroad, and aims to provide a new use of the resina ferulae volatile oil. The resina ferulae volatile oil of the invention is used for preparing an anti-cancer preparation. The anti-cancer preparation can be preparations for injection, capsules, pills, tablets, granules, powders, oral liquid or other dosage forms. The resina ferulae volatile oil mainly contains: alfa-pinene, alfa-terpinenes, terpine 4-alcohol, D fenchyl alcohol, pinocarveol, 2-borneol, di-sec-butyl disulphide, sec-butyl- antiform-1-butenyl disulphide, sec-butyl- propenyl disulphide, dimethyl disulphide, dimethyl tersulfide, N.N-dimethyl thioformamide, propenyl-butyl-disulphide. The resina ferulae volatile oil is extracted from the resina ferulae by adopting the common extraction method. The resina ferulae can be oleo-gum-resin of Xinjiang resina ferulae or Fukang resina ferulae, as well as oleo-gum-resin of resina ferulae from Iran, Afghanistan, Sri Lanka, etc. The anti-cancer preparation prepared from the resina ferulae volatile oil is suitable for treating patients suffering from cancers.

The invention discloses an Allium tuberosum fermented extract and a preparation method and application thereof. The Allium tuberosum fermented extract is prepared from Allium tuberosum, which serves as a raw material, through fermenting with Lodderomyces elongisporus and extracting aroma components from a fermented solution. The Lodderomyces elongisporus is collected in the China General Microbiological Culture Collection Center (CGMCC); the collection number is CGMCC No. 6645; the collection date is October 08, 2012. The prepared Allium tuberosum fermented extract contains a variety of volatile components, and aroma substances of relatively high content mainly comprise phenylethyl alcohol, dimethyl trithioether, methylpropyl dithioether, methyl pyrazine, benzyl alcohol, solanone and the like. Shown by results of flavored smoking assessment tests, the product can be harmonized with cigarette flavors, can obviously promote the cigarette flavors, make smoke gas delicate and mellow, lower irritation, conceal impurity gases and improve the smoking flavor of cigarettes, and can generate a fresh and special aroma.

The invention provides a method for preparing dimethyl disulfide by virtue of a methanthiol sulfidization method. The method comprises the specific steps of filling a tower-type reactor with a solid catalyst and then filling the tower-type reactor with a mixed solution containing dimethyl disulfide, dimethyl trisulfide and dimethyl polysulfide, keeping the solid catalyst to be immersed in the solution inside the tower, spraying powdery sulfur into the solution and continuously introducing impure methanthiol gas from the bottom of the tower-type reactor; enabling the produced hydrogen sulfide gas to return inside a thiol reactor by virtue of the tower top and synthesizing methanthiol from thiol and methanol, extracting a mixture of dimethyl disulfide, dimethyl trisulfide and dimethyl polysulfide, rectifying to obtain dimethyl disulfide, further introducing a mixed solution of byproducts dimethyl trisulfide, dimethyl polysulfide and a small amount of dimethyl disulfide into the tower-type reactor to complete the circular reaction. The conversion rate of sulfur can be not less than 99.0%, the content of bottom product dimethyl polysulfide is 0.5%-1% (in mass percentage) and the purity of dimethyl disulfide by virtue of primary rectification is not more than 99.5%.

The invention belongs to the technical field of tobacco production, and concretely relates to a method for determining smelly substances in paper-making reconstituted tobacco white water. The method comprises the following steps: collecting a white water sample by using a specific white water smelly substance collection device, and analyzing and detecting adsorbed substances through thermal desorption-gas chromatography-mass spectrometry; and judging that the white water is deteriorated and replacing or treating the white water when it is detected that the content of any one of dimethyl disulfide, N,N-dimethylformamide and dimethyl trisulfide in the white water exceeds a limit value. The method for determining smelly substances in the white water is sensitive and reliable, and the detection result is objective and is not affected by people's subjective feelings, so the judgment result of the quality of the white water is objective, and a good basic guarantee is provided for guiding theproduction of reconstructed tobacco leaves and ensuring the tobacco quality, thereby the method has good promotion and application meaning in the cigarette production field.

The invention discloses durian essence and a preparation method thereof. The durian essence comprises propanethiol, dimethyl disulfide, dipropyl disulfide, methyl propyl disulfide, 3-hydroxy-butanone,ethyl butyrate, ethyl acetate, ethyl hexanoate, methyl cyclopentenolone, vanillin, ethyl thioacetate, delta-decanolactone, dimethyl trisulfide, diisopropyl disulfide, 3-sulfydryl-2-methylpentanol, butyl mercaptan, hexanoic acid, onion oil, propenyl propyl disulfide, 2-methyl ethyl butyrate and propylene glycol. Sensory evaluation of the durian essence shows that the durian essence is close to natural durian aroma, coordinated and stable in fragrance and high in naturalness and characteristic performance; flavor quality can be improved obviously by using the durian essence.

The invention provides a preparation method of Korean pickled vegetable essence. The disclosed Korean pickled vegetable essence comprises the ingredients of Caprylic capric triglycerride,, dimethyl disulfide, dimethyl trisulfide, diallyl sulfide, dimethyl sulfide, diallyl disulfide, 3-methylthiopropanol,, star anise essential oil, cinnamon essential oil, fresh ginger essential oil, chili pepper essential oil, propanoic acid, acetic acid, ethyl caprylate, ethyl caprate, ethyl acetate, 3-methylthiopropyl aldehyde and allyl isothiocyanate. The prepared pickled vegetable essence has the characteristics of being real and natural in fragrance, rich in mouth feel and stable in flavor, the appetence degree of a consumer is increased, and the Korean pickled vegetable essence can be well applied tothe field of foods of leisure puffed foods and the like.

The invention also relates to the use of asafetida volatile oil in preparing medicament for treating irritable bowel syndrome, which can be in the forms of injection, capsules, drop pill, tablets, granules, powder, oral liquid or other dosage forms, the asafetida volatile oil mainly contains alpha-firpene, 2-bornyl alcohol, dibutyl bisulphide, sec-butyl-trans-1-cyclobutenyl bisulphide, sec-butyl-trans-isoallyl bisulphide, dimethyl disulfide, dimethyl trisulfide, N,N-dimethyl thioformamide, and isoallyl-butyl-bisulfide.

The invention relates to a method for producing dimethyl disulfide through a methyl mercaptan vulcanization method, and belongs to the technical field of chemical engineering, the method for producing dimethyl disulfide through the methyl mercaptan vulcanization method can realize large-scale utilization of hydrogen sulfide, and provides a new thought for comprehensive utilization of hydrogen sulfide in petrochemical engineering and coal chemical engineering; the method comprises the following steps: absorbing effective gases such as hydrogen sulfide in methyl mercaptan synthesis tail gas by using low-temperature methanol, desorbing hydrogen sulfide gas from an absorption liquid for recycling, and desorbing the absorption liquid methanol and conveying the desorbed absorption liquid methanol to a mercaptan reactor to participate in a reaction; the methyl mercaptan is subjected to a high-pressure rectification process, and rectification tail gas is returned to methyl mercaptan synthesis for recycling; the hydrogen sulfide gas obtained by the reaction of the vulcanizing tower returns to the mercaptan reactor for recycling, the dimethyl trisulfide and the dimethyl polysulfide generated by the reaction of the vulcanizing tower can be used as feed of the vulcanizing tower to react with methyl mercaptan to generate dimethyl disulfide, and the production device is advanced in technology, high in reaction efficiency, high in effective component utilization rate and small in pollution.

The present invention relates to the use of asafetida extract in the preparation of medicine for abstinence of drugs. The present invention further relates to a method for abstinence of drugs, which comprises administering a therapeutically effective amount of asafetida extract to subjects. The asafetida extract according to the present invention may be extracted from factice resin of Ferula sinkiangensis K.M. Shen or Ferula fukanensis K.M. Shen, and consists essentially of α-pinene, α-terpinene, 2-borneol, terpin-4-ol, D-fenchyl alcohol, pinocarveol, β-ocimene A, β-ocimene B, di-sec-butyl disulfide, sec-butyl-trans-1-butenyl disulfide, sec-butyl-cis-propenyl disulfide, sec-butyl-cis-1-butenyl disulfide, sec-butyl-trans-2-butenyl disulfide and thio-sec-butyl-trans-methylethenyl disulfide. The asafetida extract according to the present invention may also be extracted from factice resin of F. assafoetida L from Iran, Afghanistan and the like, and consists essentially of α-pinene, 2-borneol, terpin-4-ol, D-fenchyl alcohol, pinocarveol, dimethyl disulfide, dimethyl trisulfide, methylpropenyl disulfide, 2,2-dimethylthiopropane, 1,2-diethylthiopropane, N,N-dimethylthioformamide and propenylbutyl disulfide. The medicine for abstinence of drugs prepared with asafetida extract according to the present invention is suitable for the use in the abstinence treatment of subjects addicted to opioid, morphine, marijuana, diamorphine and the like.

The present disclosure provides for a composition and method for attracting bed bugs to a trap or to a location where an insecticide or pesticide is present, or to a trap or a location where a bed bug infestation can be detected. The present disclosure provides for a composition for attracting bed bugs that includes one or more of methyl diethanolamine (MDEA), monoethanolamine (MEA), diethanolamine (DEA), triethanolamine (TEA), and dimethyl trisulfide (DMTS); a carrier; and optionally one or more amides selected from oleamide, octanamide, nonanamide, and laurylamide; urea, biuret, or triuret; and one or more aliphatic fatty acids. The present disclosure further provides for a method for treating an article by applying the composition to the article, where the article comprises a device for trapping or detecting bed bugs or a device for treating a bed bug infestation.

The invention discloses a group of fragrance compositions with salty and fresh enhancing characteristics and application thereof. The fragrance composition is prepared from one or more components of 3-(methylthio) propionaldehyde, 3-(methylthio) propanol, maltol, HEMF, 1-octylene-3-ol and dimethyl trisulfide. The fragrance composition not only has a good salt enhancing characteristic to maintain the salinity and flavor acceptance of foods while the salt content of the foods is reduced, but also has a good fresh enhancing characteristic to effectively promote the fresh intensity, aftertaste, rich taste and satiety of the foods, and can be applied to seasonings such as soy sauce, fish sauce, oyster sauce and the like, soups such as chicken soup, beef soup and the like, sauces such as beef sauce, barbecue sauce, and fried foods such as dry fried foods, deep-fried foods and flour-coated deep-fried foods.

The invention discloses a molybdenum disulfide/sulfur-doped graphene composite material and a preparation method and application thereof. The molybdenum disulfide/sulfur-doped graphene composite material comprises a carbon layer, molybdenum disulfide and sulfur-doped graphene. The preparation method comprises the following steps: mixing raw materials of molybdenum salt, graphene oxide dispersion liquid, dimethyl trisulfide and an oxygen-containing organic carbon source, then carrying out hydrothermal reaction, and carrying out heat treatment to obtain the molybdenum disulfide/sulfur-doped graphene composite material. The preparation method disclosed by the invention is simple to operate, mild in reaction condition and suitable for industrial production; and according to the molybdenum disulfide/sulfur-doped graphene composite material prepared by the preparation method, the electronic conductivity, the ionic conductivity and the specific capacity are greatly improved, and the cycling stability is good.