62 results about "Thiocarbonic acid" patented technology

The present invention provides a process for producing copper nanoparticles, comprising steps of: a) reacting an aqueous solution containing a reductant with an aqueous solution of a copper salt while stirring for 1-8 min, wherein the reductant being one or more selected from a group consisting of hydrazine hydrate, sodium borohydride and sodium hypophosphite; b) adding an apolar organic solution containing the extracting agent and continuing the stirring for 0.5-1.5 hrs, said extracting agent being one or more selected from the group consisting of alkyl dithiocarbonic acid and salts thereof, O,O′-dialkyl dithiophosphoric acid and salts thereof, and dialkylamino dithioformic acid and salts and said apolar organic solution being one selected from the group consisting of benzene, toluene and straight or branched alkanes having 6-12 carbon atoms, wherein the alkyl having 6-20 carbon atoms; and c) post-treating the reaction product to obtain copper nanoparticles.

The invention discloses a method and device for deeply removing copper of nickel thiocarbonate from a nickel-containing solution. Substantially, the nickel thiocarbonate after pulping is used as a copper removal agent; and the copper removal agent is automatically added through a mechanical mixing pump and is uniformly mixed with the nickel-containing solution in a pipeline reactor to remove copper. The method can realize continuous copper removal in the closed environment, the copper removal efficiency is high, and the concentration of the liquid cooper after copper removal is lower than 3mg/l. The copper-nickel ratio in the copper removal slag is greater than 15, thereby completely meeting the production requirements.

The invention relates to a colorimetric fluorescent probe for supersensitive analysis of mercury ions and a preparation method thereof. Concretely, the probe is a thiocarbonic acid phenyl ester compound, and the compound can be used as the mercury ion colorimetric fluorescent probe for detection of mercury ions. The probe can be used for realizing at least one of following technical effects: identification of mercury ions with high selectivity; rapid response of mercury ions; high sensitivity analysis of mercury ions; stable property, and long-term preservation and usage; high anti-interference capability.

A method of making a compound of the formula shown below is disclosed:

wherein Z is Se or S; Y is NH or O; X is O or S and W and W′ are independently selected from the group consisting of hydrogen, —C═ONH₂, —C═ONHR′, —C═ONR′R′, —C≡N, and R′ is C_1-6 alkyl and the resultant monomer compounds. The method includes contacting a 3,4-disubstituted thiophene or selenophene or disubstituted thiophene or selenophene derivatives with a carbonyl or thiocarbonyl containing compound selected from the group consisting of ureas, thioureas, carbonate esters, thionocarbonates, thiocarbonate esters, or orthocarbonates. The monomer compounds are suitable for forming polymers for use in a wide range of electronic applications.

The invention relates to a nitration method having the following principles: a phosgene species is converted with two equivalent silver nitrates into a double-mixed anhydride of carbonic acid and nitric acid, known here as carbonic acid dinitrate (I). Said operation is carried out in situ, and the formed dinitrate decomposes spontaneously. In addition to carbon dioxide, nitrate ions and nitronium ions are formed, said ions comprising electrophiles which are necessary for nitration. The solution which is used is acetonitrile, and is insignificant if the alcohol species is dissolved or suspended. The necessary equivalent silver nitrates are introduced into the system and optionally heated or cooled to the desired temperature. Subsequently, the acid chloride is introduced slowly, drop by drop or slowly little by little. Phosgene, diphosgene, triphosgene and chloroformic acid ester can be used as carbonic acid dichloride and monochloride, and their thiocarbonic acid analogues. A brown colouration and precipitated silver chloride display the formation of the carbonic acid reactants, said brown colouration rapidly discolouring due to an immediate reaction of the nitronium ions with the substrate with is to be nitrated. Towards the end of the addition of phosgene, the brown colouration remains for longer and longer until it no longer disappears. Then, it is stirred for another hour at room temperature. In the event of high acid-sensitive educts, non-nucleophilic nitrogen bases such as DBU can be added to the system in order to intercept the formation of nitric acid.

The invention discloses an organic catalyst, a preparation method and application. The invention discloses an organic catalyst, which has any one of a compound structure shown in a formula I or a formula II, wherein and m and n are independently selected from integers of 1-50, in the formula II, h is selected from an integer of 1-100000, when h is larger than or equal to 2, n and m are independent, m can be the same or different, and n can be the same or different, X is an electrophilic reagent, and Y is a nucleophilic reagent. The organic catalyst provided by the invention is a catalyst withelectrophilic and nucleophilic double functions. The invention also discloses a preparation method of the organic catalyst. The organic catalyst provided by the invention can be used for preparing polyether, polyester, polycarbonate, polythiocarbonate, polythioether and other high polymer materials, and can effectively synthesize cyclic (thio) carbonate, lactone and other fine chemicals with highadded value.

The invention discloses a catalytic supported polymer. The structural formula is any one of a formula (I) or a formula (II). In the formulas, A is a urea or thiourea group, B is onium salt with positive charges, M is a comonomer, and X is a corresponding negative charge balance ion; and m represents the number of A and is any integer between 1 and 100000, and n represents the number of onium salt groups and is any integer between 1 and 100000. The invention also discloses a preparation method of the catalytic supported polymer, and application in catalysis of polymerization of one or more cyclic monomer bodies for obtaining amacromolecular polymer or a reaction of one or more cyclic monomers with carbon dioxide, carbon disulfide, carbon oxysulfide and carbon monoxide to obtain small molecular compounds and macromolecular polymers of cyclic carbonate cyclic lactone, and cyclic thiocarbonate. The catalytic supported polymer has relatively high catalytic activity and selectivity when applied to catalytic preparation of organic micromolecule and macromolecular polymers.

The invention provides a soil pollution remediation reagent. The soil pollution remediation reagent is prepared from the following raw materials in parts by weight: 40-50 parts of polyacrylamide, 20-30 parts of modified diatomite, 14-18 parts of quick lime, 4-8 parts of sodium humate, 3-6 parts of ethyl dithiopotassium carbonate, 4-8 parts of ethylene diamine tetraacetic acid disodium salt and 0.26-0.48 parts of a water-retaining agent. The soil pollution remediation reagent provided by the invention is simple to operate, convenient to carry and good in heavy metal treatment effect, can improve soil organic matters and improve the absorption capacity of soil to nutrients while treating heavy metals, avoids the phenomenon of soil hardening, can ensure the content of water in soil and normal growth of crops, has a good remediation effect on soil around mineral products and is short in remediation period, and the preparation process of the remediation reagent is simple.

The invention relates to a preparation and application method of a self-vulcanization oil-soluble multi-metal composite hydrocracking catalyst, which comprises the following steps: adding sodium polyalcohol into carbon disulfide, and reacting to obtain alkyl sodium dithiocarbonate; and then adding alkyl sodium dithiocarbonate into a mixed solution of a VIII group metal iron source, a cobalt sourceand a nickel source to react to prepare the oil-soluble multi-metal composite catalyst. By adding an auxiliary dispersing agent, the multi-metal composite catalyst can be quickly, mutually and stablydispersed in inferior heavy oil, can be self-vulcanized and decomposed to form nanoscale dispersed active metal composite sulfide, and has excellent hydrogenation activity and coking inhibition performance. The catalyst provided by the invention has the characteristics of simple preparation process, no need of vulcanization, small catalyst addition amount, simple application and the like, is suitable for a low-cost slurry reactor hydrocracking process of high-metal, high-carbon-residue and high-viscosity inferior heavy oil, and is also suitable for a slurry reactor hydrogenation pretreatmentpurification process of waste lubricating oil.

The invention discloses a phosphorus salt amphiphilic bifunctional organic catalyst as well as a preparation method and application thereof, and belongs to the field of synthesis and application of organic catalysts. The invention solves the problem that the existing organic catalytic system is characterized in that the polymerization reaction can be realized only by mixing two or more components of nucleophilic and electrophilic reagents and even adding a cocatalyst or an initiator. According to the phosphorus salt amphiphilic bifunctional organic catalyst provided by the invention, nucleophilic and electrophilic groups and initiation species are mixed into a catalytic system, the catalyst has nucleophilic and electrophilic bifunctional sites, and the use of a complex multi-component multicomponent catalytic system is avoided. The catalyst can be used for preparing high polymer materials such as polyether, polyester, polycarbonate, polythiocarbonate and polythioether and synthesizing blocks or random copolymers of the high polymer materials, can also be used for preparing fine chemicals such as cyclic carbonate, lactone and thiocyclic carbonate through small organic molecule coupling reaction, and has the characteristics of high efficiency, high selectivity, controllability and the like.

The invention provides a polytetrafluoroethylene composite material. The composition is prepared from the following components in parts by weight: 80-99 parts of fluorine-containing resin, 0.1-5 partsof fluorinated graphene, 0.1-19 parts of glass fiber and 0.1-1 part of antimonous oxide. The polytetrafluoroethylene composite material is prepared by dispersing polytetrafluoroethylene resin, fluorinated graphene, glass fibers and antimonous oxide in a carboxylic acid modified macromolecular dispersing agent solution according to a weight ratio, drying, pressing, molding and sintering. The preparation method of the carboxylic acid modified macromolecular dispersing agent comprises the following steps: dissolving acrylated methoxy polyethylene glycol, acrylic acid, S, S'-bis(2-methyl-2-propionic acid) trithiocarbonate and azodiisobutyronitrile in dioxane, introducing inert gas to remove oxygen, magnetically stirring until a homogeneous solution reacts at 60-80 DEG C, washing with n-hexane, and carrying out vacuum drying on the product. All the components in the polytetrafluoroethylene composite material are good in dispersity, and the polytetrafluoroethylene composite material has excellent mechanical property and heat-conducting property.

Provided is a process for the preparation of a compound with at least one five-membered cyclic monothiocarbonate group. A compound C1 with at least one halohydrin group is used as starting material. Compound C1 is reacted with phosgene or an alkyl chloroformate to give an adduct C2. The adduct C2 is reacted with a compound that includes anionic sulfur to obtain the compound with at least one five-membered cyclic monothiocarbonate group.

The present disclosure provides a crystalline polythiocarbonate and a preparation method thereof. The crystalline polythiocarbonate is a random copolymer and includes five structural units L1 to L5 as shown in the following formula. The method includes carrying out a polymerization reaction natively or in solution using carbon disulfide, ethylene oxide, selectively added third monomer, initiator, Lewis acid, selectively added chain transfer agent, and selectively added solvent as raw materials. This method provides a new way for high value-added application of carbon disulfide and ethylene oxide by using inexpensive carbon disulfide and ethylene oxide as monomers; the product is a random copolymerized crystalline polythiocarbonate with novel structure, which has various chain link structures and excellent mechanical properties, processing properties and degradability.

A process prepares a compound containing at least one cyclic monothiocarbonate group, wherein a salt of an acidic compound with at least one acidic hydrogen atom is reacted with a compound of formula (I),

wherein one of the groups R¹ to R⁴ is a group of formula (II), -A-X, with A representing an organic group with at least one carbon atom and X representing a halide, and the remaining groups R¹ to R⁴ independently from each other represent hydrogen or an organic group with 1 to 50 carbon atoms.