205 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%.

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.