15 results about "Carbon bisulfide" patented technology

The application discloses a chrysochlamys zollingeri extract functionalized viscose fiber and a preparation method and application thereof, and belongs to the technical field of functional fiber material preparation.The chrysochlamys zollingeri extract functionalized viscose fiber is formed by wet spinning process of a viscose original solution containing microcapsules, and the viscose original solution containing microcapsules is prepared by mixing a viscose original solution and chrysochlamys zollingeri extract / porous starch composite microcapsules, wherein the viscose original solution is prepared by impregnating cellulose pulp with a sodium hydroxide aqueous solution, carbon disulfide yellowing, and then dissolving and aging in a sodium hydroxide aqueous solution.The chrysochlamys zollingeri extract functionalized viscose fiber is prepared by microcapsule embedding combined with a mild spinning process, so that active ingredients of the chrysochlamys zollingeri extract are maximally retained, long-acting, stable and slow release and anti-inflammatory and soothing effects are achieved, the chrysochlamys zollingeri extract functionalized viscose fiber can be further processed into a functional fabric through a water jet process, and is suitable for high-end sanitary material fields such as infant paper diapers.

The application provides a polyxanthate compound and a preparation method thereof, and relates to the technical field of organic polymer synthesis. The application adds a dihydric alcohol compound, alkali and carbon disulfide into an organic solvent, and stirs and reacts; a dihalogenated compound is added into the foregoing reaction system for reaction, stirring, precipitation, drying, and thus a polyxanthate compound is obtained. The application has the characteristics of mild reaction conditions, simple operation, and easily available raw materials, and the obtained polyxanthate compound has excellent solubility, thermal stability, ultraviolet resistance and refractive performance.

This invention provides a system and method for preparing sodium ethyl xanthate based on microchannel technology, belonging to the field of chemical synthesis technology. The system includes a storage tank, a metering pump, a mixing pump, a microchannel reactor, a concentration vessel, a condenser, a centrifuge, and a dryer. The method includes: mixing carbon disulfide, ethanol, and liquid alkali in a predetermined ratio via the mixing pump, then feeding the mixture into the microchannel reactor; reacting under controlled temperature and residence time conditions to generate a sodium ethyl xanthate solution; concentrating the solution by vacuum distillation in the concentration vessel; centrifuging to separate the solid product; and drying to obtain the final product. This invention improves reaction efficiency and product purity by precisely controlling reaction conditions and equipment coordination, reducing side reactions and byproduct formation, and lowering the hazards and environmental pollution of the production process. It has the advantages of high efficiency, safety, and environmental friendliness, providing an efficient solution for the industrial continuous production of sodium ethyl xanthate, and is suitable for wide application in fields such as mineral processing reagents.

A method for preparing diisopropyl xanthate, a solid base catalyst is filled into a fixed bed reactor after being immobilized with molybdenum disulfide, a mixed solution of isopropyl alcohol, carbon disulfide and an organic solvent is injected into a micro-mixer through a feeding pump at the same time with oxygen or air, the gas-liquid mixture is fully mixed and then enters the fixed bed for heterogeneous catalytic oxidation reaction. The solid base-immobilized composite catalyst has long service life and good stability; the composite base catalyst can provide an alkaline environment to promote the formation of intermediates and avoid the generation of high-salt wastewater; a micro-mixer is added at the front end of the fixed bed reactor to realize the full mixing of gas-liquid, so that the gas-liquid heterogeneous catalytic oxidation reaction can be continuously carried out with high efficiency and high selectivity; oxygen or air which is cheap and easy to obtain is used as the oxidant, and the by-product is water, basically without three wastes.

This invention discloses a refining process and equipment for high-concentration sulfur dioxide byproducts of chemical production tail gas, relating to the field of chemical tail gas treatment and resource recovery technology. The process includes pretreatment, adsorption and regeneration, extractive distillation, double-effect distillation, and finished product collection. In this invention, micro-oxygen pre-removal utilizes the reaction of sodium bisulfite with oxygen to remove trace amounts of oxygen from the tail gas. Simultaneously, the crystals precipitated from the reaction capture residual micron-sized acid mist, blocking the sulfite oxidation side reaction at its source and preventing equipment scaling and clogging. Gradient reverse adsorption changes the gas flow direction, matching different concentrations of impurities to corresponding adsorbents, achieving synchronous saturation of each adsorption layer and improving adsorbent utilization. Pressure swing extractive distillation sets different pressure ranges within a single tower to increase the relative volatility of carbon disulfide and sulfur dioxide, enhancing the separation of difficult-to-separate impurities. Finally, a four-stage separation system is constructed to remove impurities of different properties at each stage for progressive depth removal.

A method for simultaneously removing nitric oxide and sulfur dioxide, belonging to the field of air pollution control technology, is characterized by introducing the gas stream to be treated into a reactor, simultaneously introducing an absorbent into the reactor. Sulfur dioxide in the gas stream undergoes a redox reaction with ferric chloride in the absorbent, causing the sulfur dioxide to be oxidized to sulfate ions, which are then absorbed by the absorbent. Nitric oxide gas in the gas stream reacts chemically with solid ferric chloride crystals in the ferric chloride slurry of the absorbent and is absorbed. The absorbent, after saturation, is regenerated and recycled. This method can also remove harmful gases such as carbon disulfide, carbon oxysulfide, and hydrogen sulfide from the gas stream separately.

The application discloses a kind of molybdenum bis (dibutyl dithiocarbamate) oxide and preparation method thereof, comprising the following steps: molybdenum trioxide, phase transfer catalyst and water are uniformly mixed, are sent into first-stage mixing reactor, sodium hydrosulfide, sodium thiosulfate and water are uniformly mixed, also are sent into first-stage mixing reactor, and first reaction solution is obtained by reaction;Di-n-butylamine and water are uniformly mixed, are sent into second-stage mixing reactor, carbon disulfide is simultaneously sent, and second reaction solution is obtained by reaction;First reaction solution, second reaction solution are respectively sent into third-stage mixing reactor and are reacted, obtain molybdenum bis (dibutyl dithiocarbamate) oxide solution, solid-liquid separation, drying, obtained immediately.The yield of product obtained by the application is high, the purity is high, the quality is stable, the whole reaction process is continuously carried out in airtight container, there is no gas volatilization, which is conducive to environmental protection, reaction solvent is water, resource consumption is less, can be recycled, clean and environmentally friendly.

This invention relates to the field of carbon disulfide preparation technology, specifically to a reboiler and a carbon disulfide distillation column containing the reboiler, comprising a self-driven anti-scaling component assembly. The self-driven anti-scaling component assembly includes a rotating cleaning component assembly and a self-opening and closing anti-clogging and descaling mechanism. The rotating cleaning component assembly is installed at the top of the main pipe fitting and is used to agitate and clean the inner wall of the main pipe fitting in solution using steam within the main pipe fitting. This invention utilizes a steam-driven cleaning and turbulence impeller to clean the pipe wall online, inhibiting scaling; a self-opening and closing valve cover adaptively adjusts the opening to prevent clogging and scouring; rotating micro-vibration collaboratively breaks down initial adhesion and enhances cleaning; shutdown impact removes outlet crystals; and outlet turbulence improves steam distribution and reduces mist entrainment. This achieves efficient self-cleaning and improves operational stability.

This invention relates to the field of medium- and long-chain xanthic acid synthesis, specifically disclosing a microtubular synthesis method and system for medium- and long-chain xanthic acid and its salts. The method involves: reacting a mixed solution containing a medium- and long-chain alcohol of formula 1, carbon disulfide, an M-containing base, and an aqueous solvent in a microtubular reaction chamber to continuously synthesize medium- and long-chain xanthates of formula 2; and / or acidifying the medium- and long-chain xanthates to obtain long-chain xanthic acid; ROH (formula 1); RCSSM (formula 2); the inner wall size of the microtubular reaction chamber is in the micrometer or millimeter range, and the inner wall of the tubular reaction chamber is provided with a turbulent mixing unit for mixing; the molar ratio of hydroxyl groups, carbon disulfide, base, and water in the medium- and long-chain alcohol is 1:(1~4):(0.9~1.3):(2~25). Based on microtubule reactions, this invention precisely controls the excess of carbon disulfide and combines it with a specific ratio of auxiliary solvents to form a mixed solvent system, which significantly improves the synthesis of medium and long chain xanthic acid and its salts.

The application provides a method for deeply removing sulfides from fuel gas, comprising the following steps: (1) removing hydrogen sulfide gas by an organic alcohol amine absorbent; (2) contacting and reacting the fuel gas after removal of hydrogen sulfide gas with an oxidizing solvent to remove methyl mercaptan, dimethyl sulfide and residual hydrogen sulfide, the oxidizing solvent comprising 1-10% of an organic alcohol amine, 0.5-20% of an organic solvent, 2-38% of an oxidizing agent, 0.2-1% of an inorganic salt, and the balance of water, the organic solvent being at least one selected from the group consisting of tributyl phosphate, dimethylformamide, N-methyl pyrrolidone and polyethylene glycol dimethyl ether; the oxidizing agent being at least one selected from the group consisting of sodium hypochlorite, sodium chlorate, potassium hypochlorite, potassium chlorate, hydrogen peroxide and potassium permanganate; the inorganic salt being sodium carbonate and / or potassium carbonate; (3) adsorbing the fuel gas after removal of hydrogen sulfide, methyl mercaptan and dimethyl sulfide by an adsorbent to remove carbonyl sulfur and carbon disulfide.

The application discloses a refining method of ultraviolet absorber UV-3030, which aims at removing various organic solvents in the form of molecular adducts in UV-3030 products obtained through recrystallization, and making the melting point of the UV-3030 products reach 174-176 DEG C. The refining method of the ultraviolet absorber UV-3030 is realized according to the following method: the product (dry melting point 125-140 DEG C) obtained through recrystallization by using toluene, xylene, tetrachloroethylene, dichloromethane, ethyl acetate, methanol and other organic solvents or mixed solvents is suspended in carbon disulfide solution, heated to reflux for a certain time, filtered, dried, and then the refined product with the melting point of 174-176 DEG C is obtained, and the refining yield is greater than 95%. The refining method has the advantages of simple process, green environmental protection and low cost, and the obtained product has high purity and the melting point meets the product requirements.

A collision-resistant pressure vessel steel for storing and transporting carbon disulfide, comprising the following components (wt%): C: 0.10–0.20%, Si: 0.20–0.40%, Mn: 1.35–1.80%, Al: 0.025–0.045%, P≤0.015%, S≤0.005%, Nb: 0.025–0.045%. The process involves: smelting, casting into a billet, heating the billet, rough rolling, finish rolling, cooling, normalizing, and stress relief. This invention ensures a yield strength R... eL ≥360MPa, tensile strength R m With a yield strength of 540–630 MPa, a yield ratio ≤0.85, and an elongation after fracture (A) of 24–40%, the drop hammer tearing (DWTT) energy is 15.5–21 kJ; the dynamic yield strength (Re) is 490–700 MPa, and the dynamic elongation after fracture (A) is... d At 27-40%; when the collision velocity is 6-50 m / s and the collision displacement is 1.5 m, the energy absorbed by the steel plate after the collision is 2.80-3.40 KJ, and the strength-ductility product is 15960-25040 MPa·.

The application discloses a kind of die-casting aluminum putty cleaning agent and preparation method thereof, and cleaning agent is composed of aminosulfonic acid, citric acid, carboxyethylthiosuccinic acid, thiourea derivative, imidazoline, gemini cationic surfactant DF-65, fatty alcohol polyoxyethylene ether mixture, C13-isomer alcohol ether T1308, long-chain fatty alcohol polyoxyethylene ether LMEO-18, polyvinylpyrrolidone PVP, diethylene glycol ethyl ether and water.The application utilizes the sulfur-containing group of carboxyethylthiosuccinic acid, has the structure similar to carbon disulfide, polarity is similar to branched long-chain alkane, has good phase solubility to die-casting aluminum surface release agent, can well emulsify surface long-chain alkane, is helpful to oil stain emulsification and dispersion, and simultaneously utilizes the interaction between high molecular polymer and surfactant, increases the viscoelasticity of oil-water interface film, strengthens emulsification, enhances the dispersion of metal oxide, realizes the rapid cleaning of die-casting aluminum surface putty.

A method for resource recovery of sulfide solid-state batteries includes the following steps: (1) mixing battery powder with a trivalent iron salt solution; (2) adjusting the pH and stirring the reaction; (3) filtering to obtain mixed filter residue A and filtrate A; (4) adding carbon disulfide to mixed filter residue A, reacting and filtering to obtain filter residue B and filtrate B; (5) distilling filtrate B to obtain carbon disulfide solvent and elemental sulfur; (6) adding excess iron powder to filtrate A, stirring or sonicating, filtering to obtain copper-iron slag product and filtrate B; (7) introducing an oxidant into filtrate B, adjusting the pH, stirring the reaction, filtering to obtain iron phosphate product and filtrate C; (8) adjusting the pH in filtrate C, reacting to obtain lithium-containing liquid. This invention enables the full resource recovery of sulfide electrolyte solid-state batteries, realizing the regeneration and utilization of various valuable substances, solving the problem of generating a large amount of toxic H2S gas during wet recovery of sulfide electrolytes, with low energy consumption and no introduction of difficult-to-treat impurity ions.

This invention discloses a separation tower and a carbon disulfide production system containing the separation tower, including a separation tower for preliminary cooling and washing of sulfur-containing gas-liquid mixtures from a reactor; it also includes an internal circulation unit, a heat recovery unit, and a control unit; the separation tower includes a tower shell, within which a first-stage washing and cooling section and a second-stage fine washing section are provided from bottom to top, and a liquid collector is provided below the second-stage fine washing section. The liquid collector has a gas-liquid separation structure that allows gas to pass through and guides liquid, and is connected to a carbon disulfide outlet opened on the tower shell; this invention belongs to the field of chemical separation technology, and the technical effect achieved is: using self-produced crude carbon disulfide as part of the washing liquid for circulation, and combining it with the waste heat of the gas at the top of the tower for preheating, the preheating process not only recovers waste heat, but also reduces the system's demand for external cooling load.