62 results about "Diallyl disulfide" patented technology

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 present invention relates to agricultural emulsion concentrates which form stable oil-in-water emulsions when diluted with water. More specifically, the invention relates to stable oil-in-water emulsions which include cinnamaldehyde and diallyl disulfide with a Calsogen® EH and Surfonic® CO 36 emulsion system. The increased stability of the emulsion allows for efficient mixing of the emulsion ingredients and effective storage and application of the cinnamaldehyde and diallyl disulfide to areas in need of nematode protection or treatment.

The invention relates to prepared meat-flavor oily essence and a preparation method thereof. The prepared meat-flavor oily essence is prepared through the following method that: monomer fragrance raw materials such as 2-methyl-3-furathiol, dual (2-methyl-3-furathiol), trans, trans-2, 4-decadienal, 4-hydroxy-2,5-dimethyl 3(2H)-furanone, trans, trans-2,4-heptadiene aldehyde, trans, trans-2,4-nonadienal, 2,3,5-trimethyl pyrazine, 5-methyl-furfural, diallyl disulfide ether, 4-methyl-5-thiazoleethanol, 2,3-dimethyl pyrazine, difurfuryldisulfide, distilled ginger oil, green Chinese onion oil, onion oil, 2-acetyl-furan, 3-mercapto-2-butanol, cassia oil, star anise oil, 3-methylthio propyl alcohol, butanedione and soy fouranone are respectively diluted by soybean oil to a stipulated concentration, then the diluted fluid is uniformly mixed, finally the soybean oil is used as a solvent to supply the 100 percent, and an essence finished product is prepared. Note of the essence consists of meat note, butter note, burnt odor, spice, delicate green note, nut note and onion and ginger note.

The invention discloses a method for synthesizing garlic oil with different compositions through phase transfer catalysis. Chloropropene reacts with sodium thiosulfate in the presence of phase transfer catalyst, generated monoester mono-sodium thiosulfate reacts with sodium sulfide through the adjustment of buffer solution, and the garlic oil mainly containing diallyl trisulfide or diallyl disulfide is obtained through extraction separation. The method can synthesize the garlic oil with different compositions through changing the phase transfer catalyst in the same reaction system so as to satisfy the content requirements of different applications for diallyl trisulfide and diallyl disulfide in dephenzoat; the chloropropene residuals exist in the garlic oil, the reaction requires low conditions, the post-processing method is simple and convenient, and the product quality and the yield are high.

The present invention relates to a preparation method of garlic essential oil, in particular to a preparation method used for separating and purifying the garlic essential oil, and belongs to the field of fine chemicals. Based on each factor of the separation and purification of the garlic oil, the preparation method adopts the influence of each parameter on the separation and purification of the garlic oil so as to explore the best process of purifying the garlic oil through molecular distillation. In the method, crude garlic oil is selected; a molecular distillation device is used; and the molecular distillation is used for separating and purifying the garlic essential oil. The preparation method has the advantages of simple separation and easy operation. In the prepared the garlic essential oil, the diallyl disulfide (DADs) and diallyl trisulfide (DATs), which are prepared after a plurality of times of distillation and purification, has the purity of 85.03 percent. The economic benefit is quite significant.

The invention relates to controllably and reversibly crosslinked urushiol resin and a preparation method thereof. The preparation method of the controllably and reversibly crosslinked urushiol resin comprises the following steps: dissolving urushiol resin or a urushiol derivative and reversible crosslinking agent diallyl disulfide in a diluent in the mass ratio being 100:1-100:30, and uniformly stirring the substances to obtain the controllably and reversibly crosslinked urushiol resin. According to the controllably and reversibly crosslinked urushiol resin, content of carbon-carbon double bonds (C=C) in the resin can be changed by controlling dose of diallyl disulfide under ultraviolet irradiation, that is, controllable free radical crosslinking polymerization of the urushiol resin is realized by controlling content of free radicals. After crosslinking polymerization of the resin, reversible crosslinking functionalization of the urushiol resin can be realized by means of the characteristic that disulfide bonds in diallyl disulfide can be oxidized under the condition of a strong base into mercapto groups to be broken. The controllably and reversibly crosslinked urushiol resin is applicable to the fields of paint technology automation technique, additive manufacturing technique, raw lacquer coating, raw lacquer pigment and the like.

The invention relates to a separation and purification method of synthetic garlic oil. The synthetic garlic oil contains 4-6 reaction products and unreacted reactants such as chloropropene and other components, wherein the useful components are diallyl disulfide and diallyl trisulfide, other components are useless, whereas chloropropene has stronger toxicity. The invention adopts an industrial chromatographic separation technology, the stationary phase is a T300 special chromatographic packing, the mobile phase is methanol and water, the ratio of which is 70:30, the flow rate is 280-300ml/min, the volume of a receiving bucket is 60L, and the total drip washing volume is 960L. After being detected by a high performance liquid chromatograph, the collected liquid is divided into four sections, wherein the second section and the third section can respectively obtain monomer pure products of the diallyl disulfide and the diallyl trisulfide by adding water and extracting; the contents of both the diallyl disulfide and the diallyl trisulfide are larger than 98%; and the monomer pure products of the diallyl disulfide and the diallyl trisulfide can replace natural garlic oil to be applied to the fields of medicines and foods, can also be used in animal feed additives and animal medicines, and have the advantages of environmental protection, safety and high efficiency. The cost of the synthetic garlic oil is only one tenth of the cost of the natural garlic oil and has considerable economic benefit.

The invention discloses soil treatment granules containing dimethyl disulfide. The soil treatment granules comprise the following components by weight percent: 1-30% of dimethyl disulfide serving as an effective component and 100% of zeolite powder. Dimethyl disulfide technical is prepared into the granules, so that the use of dimethyl disulfide as a soil fumigant is better facilitated and the granules have the characteristics of safety and convenience in use and the like. The prepared dimethyl disulfide granules have a relatively good effect on prevention and control of soil root-knot nematodes and soilborne pathogenic fungi.

The invention relates to a liquid environment-friendly heating water anti-theft agent and a preparation method thereof. The heating water anti-theft agent comprises the components based on the weight ratio: 65-94.4% of diallyl disulfide, 0.3-15% of diallyl trisulfide, 0.1-10% of propene thiol, 2-3% of boiler corrosion inhibitor, 3-5% of boiler scale inhibitor and 0.2-2% of amidosulphuric acid; the components are weighed according to the mixture ratio and evenly mixed together. The invention is beneficial to preventing residents from illegally stealing the water used for heating, so as to effectively reduce the heating cost of heating enterprises, ensure the boiler plant to have safe operation, and be beneficial to prolonging the service life of the boiler.

The invention relates to garlic essence, in particular to a preparation method of separated and purified garlic essence, which belongs to the field of fine chemistry. The preparation method comprises: separating and purifying coarse garlic essence by using a molecular distilling apparatus and molecular distillation process; and obtaining garlic essence with high purity through 1 to 5 stages of molecular distillation. The method for separating and purifying garlic essence is simple and easy to operate, can obtain diallyl disulfide (DADs) and diallyl trisulfide (DATs) containing garlic essence with purity reaching 85.03 percent, and can create very obvious economic benefit.

The invention relates to a pharmaceutical composition, in particular to a composition used for treating AIDS. The composition for treating AIDS and associated diseases comprises the following components (wt%): 30-40% of diallyl disulfide (DADS), about 40-50% of diallyl trisulfide (DATS), namely allicin, and 10-30% of allyl methyl disulfide. A preparation method of the composition used for treating AIDS and associated diseases comprises the following steps of: selecting big and plump garlic; peeling off, washing and mashing the same; putting the garlic spread in a distilling device, adding distilled water or pure water; distilling, collecting volatile oil in a brown glass bottle; preserving at 0-5 DEG C. the composition of the invention can act on HIV-1 virus and has comparatively good effect on AIDS and associated diseases.

The present disclosure relates to a feed additive composition for reducing methane production generated in the ruminant stomach of ruminant animals. Specifically, the present disclosure relates to a feed additive composition for reducing methane production comprising at least one selected from the group consisting of alliin and berberine, more specifically to a feed additive composition for reducing methane production comprising at least one selected from the group consisting of diallyl disulfide (DADS), nitrate, and eucalyptus oil. The feed additive composition according to the present disclosure may be added to the feed without additional treatment, thereby reducing the amount of methane production in the ruminant stomach without negative effects on livestock productivity. Thus, the feed additive composition can be effectively used in the ruminant animal industry.

The present invention relates to a garlic essential oil, specifically to a preparation method for separating and extracting a garlic essential oil from a crude garlic oil, and belongs to the field of fine chemical engineering. According to the method, the crude garlic oil is selected, a molecular distillation apparatus and a molecular distillation method are adopted to separate and extract the garlic essential oil. The method for separating and extracting the garlic essential oil is simple, and is easy to operate. After repeated distillation purification, the garlic essential oil is obtained, and significant economic benefits are provided, wherein the purities of the diallyl disulfide (DADs) and the diallyl trisulfide (DATs) in the garlic essential oil are 85.03%.

The invention discloses diaryl sulfide compounds and a preparation method thereof. The method uses an organic dye as a photosensitizer, an equivalent weight of an oxidant is added, an aryl hydrazine and a diaryl disulfide are used as reactants, dimethyl sulfoxide is used as a solvent, a temperature is controlled at 25-45 DEG C, a reaction is performed for 5-12 h under visible light irradiation, column chromatography separation is performed, and therefore the product sulfide compounds are obtained. The invention provides the novel method for synthesizing the diaryl sulfide target compounds by using the cheap readily-available aryl hydrazine and diaryl disulfide compounds as starting raw materials for the first time. The method provided by the invention has the advantages of mild reaction conditions, simple operation and the like, and can also conveniently synthesize the asymmetric diaryl sulfide compounds; in drug synthesis, a metal catalyst is difficult to remove, so that drug production and applications are limited; therefore, in the method provided by the invention, the metal-free catalytic system shows huge potential application value.

The invention discloses a low-temperature proton exchange membrane and a preparation method thereof and belongs to the technical field of high polymer materials. The preparation method comprises the steps as follows: tetra[4-(4'-carboxylphenyl)phenyl]ethylene, diallyl disulfide, carboxylated fullerene, an emulsifier and a photoinitiator are mixed, the obtained mixture is dropped on a glass plate and irradiated under a 220-230 nm ultraviolet lamp in a niotrgen or inert gas atmosphere for 40-50 min to be subjected to a polymerization reaction, and the low-temperature proton exchange membrane isobtained. The invention also discloses the low-temperature proton exchange membrane prepared with the preparation method. The low-temperature proton exchange membrane is low in price, high in proton conductivity and excellent in mechanical performance and water absorption and retention performance.

The invention discloses an antibacterial anti-inflammatory medical gel. The antibacterial anti-inflammatory medical gel is prepared from agarose, sodium alginate, nopol, rue oil, artemisia apiacea oil, diallyl disulfide, terpinene, sodium diacetate, histidine, sodium lactate, silymarin, cyanobacteria extract, magnesium chloride, vitamin P, tween-20, glycerin, and water. The invention also discloses a preparation method of the antibacterial anti-inflammatory medical gel. The antibacterial anti-inflammatory medical gel possesses excellent antibacterial anti-inflammatory effect; inhibition rate on staphylococcus aureus, pseudomonas aeruginosa, trichophyton rubrum, and candida albicans is 93.5% or higher; it is confirmed by rabbit skin test that no skin erythema, or edema, or irritation is caused by the antibacterial anti-inflammatory medical gel, and the antibacterial anti-inflammatory medical gel is safe and reliable to use.

The invention provides an environmentally friendly fertilizer for pest dispelling, pest killing, bacterium inhibiting and bacterium killing, and a production technology and a use method thereof. The fertilizer is a neutral or weakly acidic fertilizer, and contains a diallyl disulfide and diallyl trisulfide mixture. The pH value of a saturated aqueous solution of the fertilizer can be 5-7, and preferably 6.5-7. The fertilizer can have the following one or more characteristics: 1, a compound fertilizer or a composite fertilizer; 2, a slow release fertilizer or a controlled release fertilizer; 3, an organic fertilizer or an inorganic fertilizer or an organic-inorganic compound fertilizer; 4, urea, a urea-ammonium mixed nitrogen fertilizer and polypeptide urea; 5, monoammonium phosphate and diammonium phosphate; and 6, potassium chloride and potassium sulfate. The fertilizer can provide crop nutrients, effectively purifies soil and control the diseases and insect pests of crops, and diallyl disulfide and diallyl trisulfide are from garlic extracts, are most safe biological pesticides proved in the laboratory at present, have no toxic side effects, no drug residual and no drug resistance, and are best additives substituting antibiotics to produce nuisance free products.

The invention relates to diallyl disulfide and cinnamon oil formulations, for protecting plants from nematodes and other plant pathogens. The invention provides a method for suppressing plant damage by nematodes and other plant pathogens, which comprises the concurrent administration, to the locus, soil or seeds of plants in need of such treatment, of (a) cinnamon oil (and/or its component cinnamaldehyde), (b) an effective quantity of diallyl disulfide, as well as nematocidal compositions useful therein.

The invention discloses an anode activator used for cyanide-free silver plating. The anode activator includes 0.1-5 g/L of sulfur-bearing derivatives, 0.1-5 g/L of ammonium thiocyanate, and the balance water. The sulfur-bearing derivatives are one or more thioacetate, thioformate, methyl ammonium sulphate or diallyl disulfide. The invention also discloses a preparation method of the anode activator. According to the anode activator used for cyanide-free silver plating, a silver anode can be made to be normally dissolved in a silver plating tank liquor; silver ions in tank liquor is maintainedto be a normal production range; and the service life of the tank liquor is prolonged and extra losses due to bad anodic dissolution is reduced.

The invention provides a Bradysia odoriphaga attractant and a preparation method and application thereof and relates to the technical field of biological attraction. The Bradysia odoriphaga attractant provided herein comprises allyl methyl disulfide and diallyl disulfide, has significant attracting effect for Bradysia odoriphaga, is nontoxic and harmless and causes no environmental pollution; the preparation method of the Bradysia odoriphaga attractant provided herein is simple to perform and low in cost; an attracting core provided herein comprises the attractant provided herein, is efficient in attracting adults of Bradysia odoriphaga, and is capable of monitoring, trapping or killing the adults of Bradysia odoriphaga, thereby decreasing population density and damage of Bradysia odoriphaga to Chinese chives.

The invention discloses a feed additive for control of the soft-shelled turtle putred-skin disease and a preparation method thereof. The feed additive is mainly made from the following raw materials by weight: 5-8 parts of lophatherum gracile, 1-2 parts of ephedra, 3-5 parts of semen litchi, 10-20 parts of Bupleurum, 3-5 parts of Momordica grosvenori, 10-15 parts of honeysuckle, 3-7 parts of rose, 1-2 parts of calcium carbonate, 1-2 parts of wild hawthorn, 3-7 parts of diallyl disulfide and diallyl trisulfide, 1-3 parts of azithromycin, and 1-2 parts of acetaminophen. The feed additive for control of the soft-shelled turtle putred-skin disease can improve the immune and antiviral ability of the soft-shelled turtle, reduce the infection rate of the bacterial virus of the putred-skin disease and improve the prevention and control effect of the putred-skin disease. The feed additive has the advantages of convenient medication, high absorption rate, no drug residue, and no toxic or side effects.

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.