204 results about "Bisulfide" patented technology

A composition useful for nitrate removal, and treatment of water, selected from mining, agriculture industries, military operations, or others water stream, or industrial waters, livestock wastewater and a livestock water stream or from other sources, which comprises a sufficient amount of organic modified clay, a highly crosslinked carbohydrate polymer with branched-chain structure and having present sulfide or disulfide group, or alloy or blend with triazine-trithione sodium salt, high swelling sodium bentonite or calcium bentonite, and activated carbon, without pH adjustment, and/or presents of electropositive metals inorganic acid or alkaline compounds.

The invention relates to a mercaptan removal and lye regeneration device and a method for gasoline light fractions. The mercaptan removal and lye regeneration device for gasoline light fractions comprises a static mixer, a liquid film alkaline wash reactor, a lye coalescence remover, a lye oxidation separation tower and a liquid film extraction contactor. The mercaptan removal and lye regeneration device and the method for gasoline light fractions have the advantages that pre-alkaline washing is used for removing hydrogen sulfide and phenol, so that the investment is low; the two-stage liquid film alkaline wash reactor and the alkaline wash process are utilized, so that the mercaptan in products can be guaranteed to be below 10 parts per million (ppm), no free lye is carried, and the copper sheet corrosion and water-solutbility acid base detection can be guaranteed to be qualified with no water wash needed; the oxidation rate of mercaptan sodium in the lye is high, two-phase perturbation emulsification is quite slight, and more than 60% of generated disulphide can be separated and recycled; the content of the disulphide in the regenerated lye can be guaranteed to be no more than 100 ppm, and the regenerated lye cannot be re-extracted into products when used for removing mercaptan in a circulation mode; the total sulfur in products can be guaranteed to be stable and not rise without replacing the lye frequently, and compared with other processes, the discharge amount of alkaline residues is reduced by more than 50%.

A polymer composite comprising a thermoplastic polyamide polymer compounded with an organo-disulfide additive and a silver-based antimicrobial agent is disclosed. The organo-disulfide additive inhibits undesirable discoloration of the thermoplastic polyamide polymer including one or more silver-based antimicrobial agent. Processes for preparing the composite are also disclosed, including compounding the organo-disulfide additive in a polymeric carrier with the silver-based antimicrobial agent, then with the thermoplastic polyamide polymer, or compounding the organo-disulfide additive with the thermoplastic polyamide polymer before adding the silver-based antimicrobial agent.

This invention relates to compositions of one or more compounds that incorporate one or more allyl sulfide, allyl disulfide or allyl polysulfide moieties, or one or more allyl sulfide, allyl disulfide or allyl polysulfide moieties and one or more hydroxyl groups, used in effective amount in formulations, including emulsions, to repel blood-feeding ectoparasitic arthropods, including mosquitoes, and to deter them from landing and feeding when applied to the skin, clothing or environment of animals, including humans. Said compounds can include, but are not limited to, 8-allyl-sulfanyloctan-1-ol. This invention also relates to compositions comprising one or more of said compounds in further combination with other arthropod repellent and deterrent compounds, including vanillin. These compounds may be formulated with inert ingredients to form a liquid, gel, paste, soap, spray, aerosol or powder.

A lubricating composition comprising a base oil, (A) one or more kinds of compounds selected from phenolic antioxidants and aminic antioxidants, and (B) an ester compound having a disulfide structure is provided. The lubricating composition of the present invention has excellent stability against oxidation, prevents increase of acid value and sludge formation, and has low corrosivity to non-ferrous metals.

The invention relates to a plastic filling master batch, which contains carrier resin, terephthalic acid metal salt, silane coupling agent and lubricating agent. The carrier resin is selected from new plastic or reprocessed plastic; the terephthalic acid metal salt is selected from one or more of sodium terephthalate, magnesium terephthalate, zinc terephthalate, potassium terephthalate, sodium terephthalate, barium terephthalate, lead terephthalate, aluminum terephthalate and ferric terephthalate; the silane coupling agent is selected from one or more of bis(gamma-triethoxysilylpropyl) tetrasulfide, bis-(triethoxysilylpropyl) disulfide and gamma-chloropropyl triethoxysilane; and the lubricating agent is selected from one or more of paraffin, white oil and stearic acid. The invention also relates to a preparation method for the filling master batch. Through the filling master batch provided by the invention, a plastic product has good surface glossiness and is not easily aged, and the tensile strength and the impact strength of the product are improved.

The use of a coupling agent containing a mercapto, disulfide, tretrasulfide and/or polysulfide end group provides a mercury removal media having increased reactivity, stability, and mercury removal ability. The mercury removal media described herein is prepared by reacting an organophilic clay containing onium ions with a mercapto, disulfide, tetrasulfide, and/or polysulfide end moiety. Alternatively, the clay can be made organophilic by onium ion reaction prior to or simultaneously with the coupling reaction of the mercapto- or sulfide-end group-containing coupling agent.

A stabilised composition comprising at least one adrenergic compound and at least one antioxidant selected from the group consisting of a bisulfite, a metabisulfite and a sulfite compound.

In a catalytic treatment process, mercaptans in sour hydrocarbon are oxidized to disulfide oils using an aqueous treatment solution containing a chelated polyvalent metal catalyst, alkali metal hydroxide, and the alkali metal salt of at least one alcohol in a non-dispersive mixing apparatus wherein an upgraded hydrocarbon containing the disulfide oils is produced.

The invention relates to an oil-contained lye separating device, which at least comprises a device shell and is characterized in that the upper space of the device shell is a tail gas separation zone provided with a tail gas outlet, and the circumferential surface of the middle-lower space of the device shell is at least distributed with an oil-alkali separation zone provided with an oxidized lyeinlet and a gas stripping separation zone, wherein an oil phase aggregation separating device and an oil phase outlet are arranged in the oil-alkali separation zone which is communicated with the bottom of the gas stripping separation zone; a gas distributor and a gas stripping gas inlet connected therewith are arranged in the gas stripping separation zone; and the device shell is provided with aregenerated lye outlet. A method comprises the following steps: adopting the oil phase aggregation separating device to perform oil-alkali separation on the oxidized lye in the oil-alkali separation zone, and then using the gas distributor to perform gas stripping in the gas stripping zone so as to obtain the regenerated lye through a lye stabilization zone, wherein the tail gas zone is communicated with other zones so as to exhaust the tail gas after the treatment. The oil-contained lye separating device integrates the separation processes of the three phases including the tail gas generatedin the lye regeneration process, the lye and disulphide into a whole; the cleanliness of the lye obtained through separation is improved, the content of the disulphide is low, and the separation effect is good; besides, the oil-contained lye separating device has the advantages of more compact structure, small volume, and reasonable and practical process.

The invention relates to a method and a device for deep oxidation of sweetening alkali liquor and separation of disulfide. The method comprises the following steps: a, alkali liquor oxidation; b, primary separation; c, deep extraction; d, oil-gas separation; and e, oil-alkali separation. By using a liquor distributor and an air distributor, the alkali liquor is in full contact with the oxygen and the oxidation conversion speed; the disulfide is deeply extracted through a fibrous membrane extraction contactor, so that the contact area is enlarged, the extraction depth is increased, the content of the disulfide in the alkali liquor is reduced to be below 200ppm, the quality of the regenerated alkali liquor is improved; the tail gas after the reaction is absorbed by a diesel absorption tank, so that the pollution of the disulfide to the atmosphere is decreased; and the gasoline after the extraction is washed, so that the influence of the residual alkali liquor to the gasoline hydrogenation is prevented. The method and the device are simple in process, energy-saving, environmentally friendly, good in device controllability, stable in operation, in accordance with the market requirement and suitable for large-scale popularization.

The invention relates to a preparation method of non-water-soluble transition metal disulphide nanosheets. The preparation method comprises the following steps that water-soluble salts containing transition metal elements are used as transition metal sources; thiourea is used as a sulphur source; the transition metal sources, the sulphur source and NaCl are added into deionized water to be dissolved according to the mol ratio of transition metal elements in the transition metal sources to the sulphur element in the sulphur source being 1: (1.8 to 2.5) and according to the mol ratio of the transition elements in the transition metal source to the NaCl being 1:(150 to 600); then, freezing and vacuum drying are performed to obtain a mixture; the prepared mixture is ground into powder; the powder is put into a tubular furnace constant-temperature region for calcination and chemical vapor deposition to obtain products; water washing and vacuum drying are carried out; the disulphide nanosheets are obtained. The disulphide nanosheets with the characteristics of high quality, uniform dimension, relatively controllable layer number, higher yield, lower relative preparing cost and the like can be obtained.

The invention discloses a tin bisulfide nanosheet composite material, as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) uniformly mixing a tin source and an L-cysteine solution, performing heating reaction for 5 to 30 hours, naturally cooling the reaction product, and alternately washing the reaction product with water and ethanol to obtain a flower-like tin bisulfide nanosheet; (2) mixing tin bisulfide and oleic acid according to the weight ratio of (1 to 20) to (1 to 60), performing soaking for 24 to 48 hours, centrifugally removing redundant oleic acid, and performing heating for 1 to 8 hours in the inert gas atmosphere of 400 to 1,000 DEG C to obtain an amorphous carbon-coated tin bisulfide nanosheet composite material. According to the method, amorphous carbon is formed by oleic acid adsorption material surface annealing, and the surface of the flower-like tin bisulfide nanosheet prepared by a hydrothermal method is coated with an amorphous carbon layer, so that the method is simple and easy to operate; the prepared amorphous carbon-coated tin bisulfide nanosheet composite material is large in surface area and thin, and has the characteristics of high cycling stability, high rate capacity and the like when being used as a battery cathode.

The invention discloses tin bisulfide single-crystal nanosheets selectively absorbing organic dyes, and a preparation method thereof. The hydrothermal temperature and the sulfur source are controlled to modulate the size dimension, specific area and other parameters of the tin bisulfide single-crystal nanosheets. The tin bisulfide single-crystal nanosheets prepared by the invention have selectivity on absorption of different types of organic dyes, can be used for absorbing dye molecules and reducing the concentration of dye wastewater, and can be used as an auxiliary for a photocatalyst to cooperate with the photocatalyst to treat high-concentration dye wastewater.

The invention relates to a desulfurizer of organic sulfur (such as carbonyl sulfide, thiol, disulphide and the like) for removing hydrocarbon, in particular for removing hydrocarbon with less than six carbon atoms; the desulfurizer comprises gamma-Al2O3 used as a carrier and alkali metal oxide used as an active constituent. The desulfurizer has the advantages of high precision for removing organic sulfur, simple preparation process and low cost, and the organic sulfur can be transferred to carbonyl sulfide with above 95% of conversion rate.

The invention relates to a desulfurizer of organic sulfur (such as carbonyl sulfide, thiol, disulphide and the like) for removing hydrocarbon, in particular for removing hydrocarbon with less than six carbon atoms; the desulfurizer comprises gamma-Al2O3 modified by silicon dioxide, which is used as a carrier and alkali metal oxide used as an active constituent. The desulfurizer has the advantages of high precision for removing organic sulfur, simple preparation process and low cost, and the organic sulfur can be transferred to carbonyl sulfide with above 95% of conversion rate.

The invention discloses a method for preparing irregular sulfonated poly aromatic (sulfur) ether with high efficiency. The method comprises the following steps that: a sulfonated monomer, a non-sulfonated monomer and a bisphenol (bisulfide) monomer are used as initial raw materials; carbonate which is 2 to 2.25 times of the total mole number of the bisphenol (bisulfide) is used as alkali and is added into the raw materials; the mixed materials react for 10 to 24 hours in a non-protonic solvent with high boiling point; then reaction solution is slowly poured into deionized water to obtain a white fibriform polymer; subsequently, the white fibriform polymer is soaked for 5 to 10 hours under the condition that the temperature is between 60 and 80 DEG C and the process is repeated for 3 to 5 times; and the white fibriform polymer is subjected to filtering, drying and vacuum drying to obtain the irregular sulfonated poly aromatic (sulfur) ether. The preparation method does not need the addition of toluene, removes the step of water separation, simplifies the process, avoids the use of mass organic, flammable, volatile and toxic solvents and the subsequent complex process of reclaiming and processing waste liquid, reduces the volume of the reaction liquid, shortens the reaction time and reduces energy consumption so as to reduce the cost of the production process and improve the working efficiency.

The invention relates to a desulfurizing adsorbent Ag2O/NaY based on a molecular screen and a preparation method thereof, belonging to the technical filed of desulfurizing adsorbents. The preparation method mainly comprises the steps of carrier pretreatment based on a urea sublimation and desublimation method; incipient impregnation of a NaY type molecular screen by using a silver salt solution and calcining of the Y type molecular screen. The desulfurizing adsorbent Ag2O/NaY based on a molecular screen has an excellent performance of dispersing the active components of carriers and therefore has an excellent adsorbent desulfurizing performance although the content of Ag2O is little; so that an excellent desulfurizing effect with lower cost can be achieved by using the desulfurizing adsorbent based on a molecular screen to remove disulfides in hydrocarbon fuel.

The invention relates to a method for preparing a thiofide of tetraethylthiuram disulfide. The method uses raw materials with the mol ratio as follows: the mol ratio of dibenzyl amine, carbon bisulfide, sodium hydroxide, hydrogen peroxide and sulphuric acid is 1:1-1.30:1.0-1.2:0.5-0.6:0.28-0.35mol. The method comprises the technical process as follows: under normal pressure, the dibenzyl amine and the sodium hydroxide are sequentially added into a reaction kettle which contains purified water under the state of being stirred; subsequently, the temperature is reduced to 20 DEG C to 30 DEG C, liquid carbon bisulfide is dropwise added for 2 to 3 hours; after dropwise adding, reactant continues to be stirred for 0.5 hour; then, at the temperature of 58 DEG C to 63 DEG C, the hydrogen peroxide is dropwise added into the reactant for oxidation reaction which lasts 3 to 4 hours; when the oxidation reaction is going to finish, the sulphuric acid is added to adjust the pH value of reaction solution to be within the range of 6.5-7.5, and the reaction is finished; then the reaction is taken for 1 hour again by heat preservation for solid-liquid separation, and the solid is dried, crushed, filtered and packed to obtain a product. The method can improve the quality, the yield and the performance of the product effectively, reduce the potential safety hazard during the production process greatly, save energy, reduce consumption, reduce the waste water and exhaust emission during the production process and meet the national relative policy of environmental protection.

The invention relates to a method for preparing a rubber auxiliary agent, and particularly discloses a method for preparing rubber peptizer 2,2-dibenzoylamino diphenyl disulphide (DBD). The method for preparing the rubber peptizer DBD is characterized by comprising the following steps of: performing ring opening reaction on benzothiazole to obtain a ring opening product; oxidizing the ring opening product to prepare diphenylamine disulphide; and performing acylation reaction on the diphenylamine disulphide and benzoyl chloride to generate the DBD. According to the method for preparing the rubber peptizer DBD, compared with the conventional process, the product cost is remarkably reduced; the method is favorable for popularization and application of the environmentally-friendly peptizer DBD, and simultaneously breaks through the situation that the product depends on import for a long term; the organic solvent is used as a reaction medium and can be recycled, so little three-waste is discharged; and the production flow is simple and easily controlled, high-temperature and high-pressure reaction does not exist in the method, the equipment investment is low, and the method is easy for production and operation.

The invention discloses a gas chromatography device for detecting sulfuryl fluoride in a sulfur hexafluoride decomposition product. The gas chromatography device comprises a sulfur hexafluoride separation device, a capillary column sampling device, a Gaspro chromatographic column, a micro-plate flow path control valve and a second sulfide detector, wherein the capillary column sampling device comprises a first inlet, a second inlet and a first outlet which are communicated with one another; the second inlet is communicated with the sulfur hexafluoride separation device; auxiliary gas is fed through the first inlet; the micro-plate flow path control valve comprises a third inlet, a second outlet and a third outlet; the Gaspro chromatographic column is respectively communicated with the first outlet and the third inlet; the second sulfide detector is communicated with the second outlet. The gas chromatography device for detecting the sulfuryl fluoride in the sulfur hexafluoride decomposition product, provided by the invention, can be used for accurately detecting the sulfuryl fluoride.

A method and system for separating hydrogen and sulfur from hydrogen sulfide (H.sub.2S) gas being produced from oil and gas waste streams. The hydrogen sulfide (H.sub.2S) gas is first passed into a scrubber and filtration unit where it encounters polysufide solution. Elemental sulfur is freed when the H.sub.2S interacts with the solution, the sulfur is filtered through a porous media such as a ceramic frit, and continues to a stripper unit where the excess H.sub.2S is removed from the sulfide solution. The excess H.sub.2S returns to the scrubber and filtration unit, while the sulfide solution passes into a photoreactor containing a semiconductor photocatalyst such as Cadmium Sulfide (CdS), Platinized Cadmium Sulfide, Pt--CdS, Zinc Sulfide, ZnS, Zinc Ferrate, ZnFe.sub.2O.sub.4, Indium Sulfide, In.sub.2S.sub.3, along with a 450-500 nm light source. The sulfide solution inside the photoreactor consisting mainly of bisulfide ion, is oxidatively converted to elemental sulfur and then complexed with excess sulfide ion to make polysulfide ion, while water is reduced to make hydrogen under the action of the light source. Hydrogen percolates out of the photoreactor, while the polysulfide solution is fed back to the scrubber unit where the system operation starts over again for additional hydrogen sulfide gas.