8 results about "Thiocarbonate" patented technology

This invention discloses a copper ion scavenging agent suitable for a wide pH range, its preparation method, and its application. The scavenging agent comprises the following components by mass: 10-30 parts trithiocarbonate, 5-20 parts N,N-dimethylaminodithiocarbamate, and 1-5 parts sodium citrate. The preparation method is as follows: (1) Add water to a sodium citrate solution and stir to prepare a buffer solution A; (2) Add trithiocarbonate and N,N-dimethylaminodithiocarbamate to buffer solution A, stir until completely dissolved, and filter to obtain the final product. This invention has the advantages of a wider pH range, copper removal effect that varies with water quality, stable copper removal effect, fast reaction speed, and rapid floc settling. After treatment, the concentration of each copper ion is less than 0.1 mg / L, the iron content is less than 0.0001%, and the lead content is less than 0.0001%, meeting the environmental emission requirements.

The invention belongs to the technical field of fluorescent probes, and discloses a thiocarbonate-based hydrogen polysulfide fluorescent probe, a preparation method and application, the fluorescent probe can respond to H2Sn with high selectivity and high sensitivity, can resist thiol interference, has obviously increased fluorescence intensity in the presence of H2Sn, can be used for qualitative and quantitative detection of H2Sn, and can be applied to detection of H2Sn. The method is successfully applied to living cell and type 2 diabetes mouse imaging, a feasible means is provided for explaining H2Sn participating in physiological and pathological effects in vivo, and a valuable tool is provided for promoting H2Sn biological research and guiding future probe development.

The invention belongs to the field of flotation, and particularly relates to a dithiocarbonate collecting agent, a preparation method of the dithiocarbonate collecting agent and application of the dithiocarbonate collecting agent in metal ore flotation. According to the collecting agent, molecular association can be promoted through intermolecular water bridging hydrogen bonds and the pi-pi accumulation effect, molecular volatilization is inhibited, and the peculiar foul smell of traditional xanthate is weakened or even eliminated from the source; meanwhile, introduction of N atoms with high electronegativity and pi-rich electron benzene rings in the molecular structure can synergistically regulate and control the electronic characteristics and the spatial configuration of collector molecules, and then selective collection of the collector on target minerals is enhanced.

The invention discloses a sulfur-containing polycarbonate copolymer and a preparation method thereof, and belongs to the technical field of polythiocarbonate materials. A molecular main chain of the copolymer simultaneously comprises a carbonate unit, a thiocarbonate unit, a polyester unit and a polysulfide chain segment formed by ring opening of elemental sulfur, and the polysulfide chain segment can be used as a crosslinking bridge bond to form a three-dimensional network structure. The preparation method comprises the step of carrying out copolymerization reaction on an epoxy compound, carbon disulfide, cyclic anhydride, carbon dioxide and elemental sulfur in the presence of a quaternary ammonium salt / quaternary phosphonium salt initiator and an organic boron catalyst under the pressure of carbon dioxide. According to the invention, coordination of mechanical properties of polycarbonate and functional characteristics of polythiocarbonate is realized through multi-component copolymerization, and introduction of S-S bonds endows the material with excellent electrochemical properties, potential self-repairing ability and adjustable crosslinking degree.

This application provides surface-charged polymer nanoparticles, their synthesis method, and applications. The synthesis method for the charged polymer nanoparticles includes: adding a thiocarbonate chain transfer agent, a charged monomer, an aromatic monomer containing at least two benzene rings, and an initiator to a mixture of water and an organic solvent to obtain a mixture; heating the mixture in a vacuum-sealed environment, and obtaining surface-charged polymer nanoparticles through a polymerization reaction and self-assembly process, wherein the charged monomer is a monomer with a single charge type.

The invention belongs to the field of RAFT reagent synthesis, and particularly relates to a preparation method of a reversible addition fragmentation chain transfer reagent. Comprising the following steps: by taking dodecyl mercaptan as a starting raw material, generating thiolate under the action of alkali; and reacting the obtained thiolate with carbon disulfide (CS2) to generate trithiocarbonate. And reacting the obtained trithiocarbonate with trichloromethane and acetone under the catalysis of alkali, and finally acidifying to obtain 2-[dodecyl sulfenyl (thiocarbonyl) sulfenyl]-2-methyl propionic acid, namely the RAFT reagent. Tetrabutylammonium bromide is specifically selected as a phase transfer catalyst, and the catalyst system provided by the invention can realize higher product yield.

The invention discloses an Off-On type fluorescent probe compound, the chemical name of the Off-On type fluorescent probe compound is thiocarbonic acid O-(2-butyl-1, 3-dioxo-2, 3-dihydro-1H-benzo [de] isoquinoline-6-yl) O-(4-fluorophenyl) ester (short for 2B6NI-4FP-TC), a preparation method of the Off-On type fluorescent probe compound and application of the Off-On type fluorescent probe compound to detection of mercury ions in complex matrix samples such as ashing soil and tea leaves. During detection, Hg < 2 + > is combined with sulfur atoms of thiocarbonate and catalyzes ester bond breakage, 4-OH of a fluorescent parent nucleus is exposed, and a system fluorescent signal is remarkably amplified. The probe has extremely high selectivity and sensitivity, the detection limit is as low as 1.5 * 10 <-8 > M, the stability in a wide pH range is good, qualitative and quantitative detection of Hg < 2 + > can be realized through visual colorimetry and fluorescence spectrum, and the probe is particularly suitable for rapid and high-throughput detection of trace Hg < 2 + > in complex matrix samples such as traditional Chinese medicines and tea leaves subjected to ashing treatment.

The invention belongs to the technical field of mineral flotation, and particularly discloses an environment-friendly xanthate collecting agent and a preparation method and application thereof. The environment-friendly xanthate collecting agent comprises at least one of alkoxy dithiocarbonate as shown in formulas I-VII, wherein the alkoxy dithiocarbonate is selected from the group consisting of alkoxy dithiocarbonate as shown in the formulas I-VII; the preparation method of the environment-friendly xanthate collecting agent comprises the following steps that epoxypropane, fatty alcohol and caustic alkali A are added into a reaction kettle, an oxyalkylation ring-opening addition reaction is conducted under the inert atmosphere, and propylene glycol ether reaction liquid is obtained; and carbon disulfide and caustic alkali B are added into the propylene glycol ether reaction liquid for a reaction, and the environment-friendly xanthate collecting agent is obtained. The raw materials are wide in source, the cost is low, the yield is high, operation is easy and convenient, no waste water is discharged in the reaction process, and the obtained product is free of pungent smell, high in collecting performance, good in environmental compatibility and easy to degrade in an aqueous solution and has good industrial application prospects.