40 results about "Thiirane" patented technology

The present invention relates generally to high sulfur content polymeric materials and composites, methods for making them, and devices using them such as electrochemical cells and optical elements. In one aspect, a polymeric composition comprising a copolymer of sulfur, at a level in the range of at least about 50 wt % of the copolymer, and one or more monomers each selected from the group consisting of ethylenically unsaturated monomers, epoxide monomers, and thiirane monomers, at a level in the range of about 0.1 wt % to about 50 wt % of the copolymer.

The invention relates to a synthetic method for N, N-diethylaminoethanethiol, comprising the following step: the N, N-diethylaminoethanethiol is prepared after mixing ethylene sulfide and diethylamine under the condition of adding catalyst and heating the mixture to 50-80 DEG C for reaction. In the method, under the condition of presence of the catalyst, the raw materials can fully react without using any solvent and the ethylene sulfide can be effectively prevented from self polymerization, thus obtaining the products with high yield and quality. Meanwhile, without producing the three wastes, the method effectively protects the environment.

The invention discloses a preparation method and application of a modified superparamagnetic Fe3O4 nanoparticle, belonging to the field of treatment of industrial wastewater. The method comprises the following steps of preparing the superparamagnetic Fe3O4 nanoparticle by adopting a coprecipitation method; by taking superparamagnetic Fe3O4 as a core, coating the surface of Fe3O4 with one or more layers of silica shells by adopting hydrolysis; modifying coated silica by applying a coupled reaction principle; by taking 3-aminopropyl trimethoxysilane as a modification reagent, modifying on a core-shell structure and connecting to an amino group; finally, using chloromethyl thiirane to synthesize a chelate which simultaneously contains nitrogen and sulfur by a nucleophilic substitution reaction; then using the chelate to adsorb heavy metal mercury, and in particular to selectively adsorb Hg<2+> at normal temperature, wherein the adsorption efficiency of the chelate is significantly higher than that of a chelate which is previously synthesized and only contains a sulfur ligating atom. The modified superparamagnetic Fe3O4 nanoparticle has the advantage of easiness in recovery and regeneration.

The invention discloses a preparation method and application of a modified superparamagnetic Fe3O4 nanoparticle, belonging to the field of treatment of industrial wastewater. The method comprises the following steps of preparing the superparamagnetic Fe3O4 nanoparticle by adopting a coprecipitation method; by taking superparamagnetic Fe3O4 as a core, coating the surface of Fe3O4 with one or more layers of silica shells by adopting hydrolysis; modifying coated silica by applying a coupled reaction principle; by taking 3-aminopropyl trimethoxysilane as a modification reagent, modifying on a core-shell structure and connecting to an amino group; finally, using chloromethyl thiirane to synthesize a chelate which simultaneously contains nitrogen and sulfur by a nucleophilic substitution reaction; then using the chelate to adsorb heavy metal mercury, and in particular to selectively adsorb Hg<2+> at normal temperature, wherein the adsorption efficiency of the chelate is significantly higher than that of a chelate which is previously synthesized and only contains a sulfur ligating atom. The modified superparamagnetic Fe3O4 nanoparticle has the advantage of easiness in recovery and regeneration.

Improved aromachemical derivatives, and fragrances and flavorings including the derivatives, that have a longer useful shelf life than the aromachemicals from which they can be derived, are disclosed. In particular, the derivatives maintain the fragrance characteristics of the aromachemicals, while lowering the allergic properties, increasing the stability, and / or increasing the odor intensity. Also disclosed are methods of making the derivatives, and articles of manufacture including the derivatives. In one embodiment, the derivatives are prepared by replacing one or more double bonds in citral with a thioether, cyclopropyl, oxirane, or thiirane group. The cyclopropane ring can be unsubstituted, or substituted with one or two lower alkyl, preferably methyl groups. The alkyl groups can optionally be substituted, for example, with electron donating groups, electron with drawing groups, groups which increase the hydrophilicity or hydrophobocity, and the like. In another embodiment, the derivatives are prepared by replacing the aldehyde group in the essential oil with a nitrile, methyl ether or acetal group. The acetal groups can provide the compounds with a long lasting flavor or fragrance, where the acetals slowly hydrolyze to provide the aldehyde group in the parent essential oil. In some embodiments, both the aldehyde and at least one of the double bond functional groups are both derivatized as described herein. Examples of suitable articles of manufacture include candles, air fresheners, perfumes, disinfectant compositions, hypochlorite (bleach) compositions, beverages such as beer and soda, denture cleanser tablets and flavored orally-delivered products such as lozenges, candies, and the like.

The invention discloses application of the compound (I) as shown in formula (I) in preparing a pharmaceutical composition for treating cerebrovascular spasm. Animal experiments confirm that: SB-3CT has certain curative effect to CVS after SAH (subarachnoid hemorrhage), and can mitigate the thickening degree of spastic vessel walls and the lumen stenosis, thus providing a new treatment approach for CVS after SAH.

A complete method for preparing diethylaminoethanethiol comprises the following steps: heating and drying thiocyanate by using a double-cone vacuum dryer, and cooling for later use after drying; carrying out cyclization reaction on ethylene carbonate and dried and heat-insulated sodium thiocyanate in a cyclization kettle to generate ethylene sulfide; and carrying out an addition reaction on the generated ethylene sulfide and excessive diethylamine in the addition kettle, putting the obtained reaction product into a distillation kettle, carrying out atmospheric distillation to collect unreacted diethylamine for direct recycling, carrying out reduced pressure distillation on the reaction product, and removing impurities to obtain the diethylaminoethanethiol. The preparation method of diethylaminoethanethiol is reasonable in process, green and environment-friendly, and high in product purity.

There is provided a coating composition having a good wetting property which is capable of forming a coating film exhibiting a high refractive index, a less discoloration, and excellent transparency and uniformity when polymerized and cured. The present invention relates to a coating composition comprising (A) 100 parts by weight of a thiirane ring-containing compound, (B) 0.0001 to 10 parts by weight of a catalyst for accelerating polymerization of the thiirane ring-containing compound, and (C) 0.005 to 4 parts by weight of a modified silicone oil; a coating film produced from the composition; and an optical product provided with the coating film.

Improved aromachemical derivatives, and fragrances and flavorings including the derivatives, that have a longer useful shelf life than the aromachemicals from which they can be derived, are disclosed. In particular, the derivatives maintain the fragrance characteristics of the aromachemicals, while lowering the allergic properties, increasing the stability, and / or increasing the odor intensity. Also disclosed are methods of making the derivatives, and articles of manufacture including the derivatives. In one embodiment, the derivatives are prepared by replacing one or more double bonds in citral with a thioether, cyclopropyl, oxirane, or thiirane group. The cyclopropane ring can be unsubstituted, or substituted with one or two lower alkyl, preferably methyl groups. The alkyl groups can optionally be substituted, for example, with electron donating groups, electron with drawing groups, groups which increase the hydrophilicity or hydrophobocity, and the like. In another embodiment, the derivatives are prepared by replacing the aldehyde group in the essential oil with a nitrile, methyl ether or acetal group. The acetal groups can provide the compounds with a long lasting flavor or fragrance, where the acetals slowly hydrolyze to provide the aldehyde group in the parent essential oil. In some embodiments, both the aldehyde and at least one of the double bond functional groups are both derivatized as described herein. Examples of suitable articles of manufacture include candles, air fresheners, perfumes, disinfectant compositions, hypochlorite (bleach) compositions, beverages such as beer and soda, denture cleanser tablets and flavored orally-delivered products such as lozenges, candies, and the like.

The invention provides a method for synthesizing aminoethanethiol, a taurine intermediate. In the method, an addition reaction of ethylene sulfide and an ammonia compound is carried out under the catalysis of a modified supported metal catalyst to obtain aminoethanethiol. The method solves the problem of easy self-polymerization of ethylene sulfide after ring-opening, improves the yield and reduces the production cost.

Sulfur composites and polymeric materials having a high sulfur content and prepared from elemental sulfur as the primary chemical feedstock. The sulfur copolymers are prepared by the polymerization of elemental sulfur with one or more monomers of amines, thiols, sulfides, alkynylly unsaturated monomers, nitrones, aldehydes, ketones, thiiranes, ethylenically unsaturated monomers, or epoxides. The sulfur copolymers may be further dispersed with metal or ceramic composites or copolymerized with elemental carbon, photoactive organic chromophores, or reactive and solubilising / biocompatible moieties. The sulfur composites and polymeric materials feature the ability self-healing through thermal reformation. Applications utilizing the sulfur composites and polymeric materials may include electrochemical cells, optics, H2S donors and antimicrobial materials.

The invention discloses application of the compound (I) as shown in formula (I) in preparing a pharmaceutical composition for treating cerebrovascular spasm. Animal experiments confirm that: SB-3CT has certain curative effect to CVS after SAH (subarachnoid hemorrhage), and can mitigate the thickening degree of spastic vessel walls and the lumen stenosis, thus providing a new treatment approach for CVS after SAH.

The invention provides a synthesis method of a taurine intermediate aminoethanethiol. According to the method, epithioethane and an ammonia compound are subjected to an addition reaction under the catalysis of a modified supported metal catalyst to obtain aminoethanethiol. According to the method, the problem that the epithioethane is easy to self-polymerize after ring opening is solved, the yield is improved, and the production cost is reduced.

The present invention discloses one kind of bacterial strain for desulfurizing sulfur-containing heterocyclic ring compound in fuel oil. The bacterial strain is named as Mycobacterium ZD-19, and has the preservation number of CGMCC No. 1817. The present invention also discloses the specific desulfurizing use of eliminating sulfur-containing heterocyclic ring compound in fuel oil. By means of biological desulfurizing technology with the strain as the catalyst, sulfur-containing heterocyclic ring compound in fuel oil is degraded. The process of degrading dibenzothiophene and its derivative 4, 6-dimethyl dibenzothiophene follows one unique 'expanded 4S path', and the traditional 'expanded 4S path' products 2-hydroxy biphenyl and 3, 3'-dimethyl-2-hydroxy biphenyl are further methylated to produce final products 2-methoxyl biphenyl and 3, 3'-dimethyl-2- methoxyl biphenyl in effectively reduced product inhibition.