16 results about "Cyanogen chloride" patented technology

The invention discloses a distillation separation mechanism and method of a cyanate ester synthesis reaction device, and belongs to the field of cyanate ester synthesizing.The mechanism comprises a distillation assembly, a first collection assembly for collecting cyanogen chloride and hydrogen chloride, a second collection assembly for collecting bisphenol compounds and a third collection assembly for collecting cyanate ester, in the second collection assembly, a second condensation pipe is connected between a second collection cylinder and the distillation cylinder, a second condensation cylinder is sleeved on the pipe, a sliding plate in the second collection cylinder is connected with a piston rod and an insertion rod, and a tension spring is arranged between the piston rod and a piston cylinder. Pressure passes through the branch pipe to enable the piston rod to move downwards, the sliding plate to descend, the volume of the communication space to descend, boiling is slowed down, the insertion rod moves downwards to enable the second collection barrel to ascend, the condensation pipe to incline and liquid drops to flow back, and the cyanate collection amount is ensured.

The present invention discloses a preparation method of a levocarnitine intermediate. It uses S-epichlorohydrin as the starting material, first undergoes an amination reaction with trimethylamine hydrochloride to obtain L-3-chloro-2-hydroxypropyltrimethylammonium chloride, and then undergoes a cyanation reaction with sodium cyanide to obtain the levocarnitine intermediate L-3-cyano-2-hydroxypropyltrimethylammonium chloride; after the amination reaction is completed, a complexing agent is used to treat the reaction system, and the complexing agent is preferably phytic acid; after the cyanation reaction is completed, an adsorbent is used to treat the reaction system; the adsorbent is preferably activated carbon. The method of the present invention can significantly improve the color of the L-quaternary ammonium salt solution by adding a complexing agent for treatment after the amination reaction, and further can significantly improve the color of the L-nitrile compound and reduce its impurity content; the method of the present invention can further improve the color of the L-nitrile compound and further reduce the impurity content of the L-nitrile compound by adding an adsorbent for treatment after the cyanation reaction.

The invention discloses tetramethyl bisphenol F cyanate ester and a preparation method thereof, and belongs to the technical field of cyanate ester, in the preparation process of the tetramethyl bisphenol F cyanate ester, firstly, tetramethyl bisphenol F is obtained through aldol reaction, then tetramethyl bisphenol F reacts with cyanogen chloride to obtain the tetramethyl bisphenol F cyanate ester, only one catalyst, namely a montmorillonite-based bifunctional catalyst is introduced in the process, and the tetramethyl bisphenol F cyanate ester is prepared through a one-step reaction. The catalyst is intercalated and compounded with the quaternized chitosan, the acid-activated montmorillonite provides a large number of acid sites for the catalyst, the quaternized chitosan provides a large number of alkaline sites for the catalyst, and due to the special positions of the acid-base centers, the acid-base centers cannot be quenched mutually, so that the catalysis of the two reactions can be realized at the same time, the process steps are simplified, and the production cost is reduced. The overall reaction progress and the product purity are improved.

The application provides a preparation method and application of a nitrogen-doped activated carbon composite zirconium-metal organic framework material. The zirconium-metal organic framework is compounded with the nitrogen-doped activated carbon, mixed and ground, and the mixed powder is bonded into a form by using a binder to obtain a broad-spectrum adsorption material capable of carrying multiple adsorption sites and synergistically acting on various toxic and harmful gas pollutants; then, the broad-spectrum adsorption material is impregnated and loaded with ammonium bicarbonate, basic copper carbonate, basic zinc carbonate, silver nitrate, ammonium molybdate tetrahydrate and potassium hydroxide by using ammonia water; the nitrogen-doped activated carbon composite zirconium-metal organic framework material has good protection capability for benzene, chloroethane, hydrocyanic acid, cyanogen chloride, sulfur dioxide, hydrogen sulfide and ammonia gas.

The invention relates to the technical field of protective materials, in particular to high-humidity-resistant multispectral protective carbon and a preparation method thereof. The preparation raw materials of the high-humidity-resistant multispectral protective carbon comprise the following components in parts by weight: 30-50 parts of an activated carbon composite carrier, 6-10 parts of basic cupric carbonate, 3-5 parts of basic zinc carbonate, 3-5 parts of ferrous sulfate and 3-5 parts of cobalt nitrate. The high-humidity-resistant multi-spectrum protective carbon is prepared by dipping an activated carbon composite carrier into metal salt, so that various toxic gases such as benzene, ammonia gas, hydrogen sulfide, sulfur dioxide, cyanogen chloride and phosgene are efficiently removed, and excellent protective performance is still kept in a high-humidity environment.

The invention relates to a treatment method for removing organic pollutants in water, which comprises the following steps: introducing ozone into to-be-treated water containing the organic pollutants to enable the initial concentration of the ozone in the to-be-treated water to be 250-550mu M, adding alkali and cyanurate chloride to enable the pH value of the to-be-treated water to be kept at 6-9, and stirring to react until water treatment is finished, wherein the molar ratio of the ozone to the cyanurate chloride in the water to be treated is 1: (0.2-1). According to the method, the pH value of a water system to be treated is adjusted by adding alkali, and the specific adding proportion of ozone and cyanurate chloride is matched, so that ionization of cyanurate chloride, enhancement of ozone decomposition inducing capability and generation of more hydroxyl radicals and active chlorine are facilitated, the utilization rate of ozone is increased, and the degradation effect of 2, 4-D is improved. And the degradation rate of 2, 4-D can reach 90% or above, the cost is low, and the process is simple.

The invention belongs to the technical field of fine chemical engineering, and particularly relates to a preparation method of tetramethylguanidine, which comprises the following steps: step 1, reacting cyanogen chloride with dimethylamine at low temperature in a tubular reactor to generate dimethylamino cyanogen and dimethylamine hydrochloride, step 2, heating intermediates of the dimethylamino cyanogen and the dimethylamine hydrochloride, and reacting to obtain the tetramethylguanidine. The method comprises the following steps: 1, adding a sodium hydroxide aqueous solution into a reaction solution, carrying out heat preservation on the reaction solution after adding a catalyst, and carrying out high-temperature condensation to generate tetramethylguanidine hydrochloride, 3, cooling the product, filtering to obtain tetramethylguanidine hydrochloride, and washing the tetramethylguanidine hydrochloride with a detergent, and 4, carrying out a neutralization reaction on the sodium hydroxide aqueous solution and tetramethylguanidine hydrochloride to obtain the tetramethylguanidine hydrochloride. And extracting the reaction solution by using an organic solvent, and fractionating to obtain free tetramethylguanidine. The catalyst is added in the reaction process, so that the temperature required by the reaction is reduced, the time required by the reaction is shortened, a continuous flow process is realized, and the productivity is remarkably improved.

The present application relates to a kind of multicolor antibacterial polyester cotton fabric and its preparation method, belong to textile technical field.The preparation method of the present application includes the following steps, S1, dispersion dye is dissolved in dispersion liquid to obtain dyeing liquid, polyester cotton fabric is immersed in the dyeing liquid, dyeing is carried out by high temperature and high pressure method, and dyed polyester cotton fabric is obtained;The dispersion liquid is obtained by mixing dispersion solvent and water according to the volume ratio 1:9-11;S2, dyed polyester cotton fabric is immersed in trimer cyanogen chloride solution, and activated dyed polyester cotton fabric is obtained by reaction;S3, activated dyed polyester cotton fabric is immersed in photosensitizer solution, and the multicolor antibacterial polyester cotton fabric of the present application is obtained by reaction.The multicolor antibacterial polyester cotton fabric of the present application has at least 99.58% bactericidal efficiency to gram-positive staphylococcus aureus and gram-negative escherichia coli under light condition (65±5mW / cm 2 , 400nm-700nm, 60min).

The utility model provides a cyanogen chloride gas purification device belongs to gas purification technical field, including casing, cyanogen chloride gas feeder, gas distributor and baffle cylinder group. The casing top has tail gas export, and the bottom has the discharge gate, the casing is the jacket structure from oneself, constitutes the secondary condensation of cyanogen chloride gas. The cyanogen chloride gas feeder includes the cyanogen chloride feeding pipe of inserting into the casing. The gas distributor sets up in the casing, is used for purging low temperature inert gas to the casing, constitutes the primary cooling of cyanogen chloride gas, and the gas distributor includes distribution cylinder and distribution air pipe, and the lower end of distribution cylinder is blocked, and the upper end is open. Distribution cylinder is provided with distribution hole. The baffle cylinder group sets up in the casing, and is concentrically nested with distribution cylinder, constitutes the baffle channel, and the tail gas export is located the outside of baffle channel. The application can improve the purification efficiency and purification quality of cyanogen chloride gas through primary cooling and secondary cooling.

The utility model discloses a cyanuric chloride chlorination device for cyanuric chloride, which relates to the technical field of cyanuric chloride production and comprises a tank body, a mixer is arranged at the upper end of the middle position in the tank body, and a sodium cyanide aqueous solution feeding pipe and a chlorine feeding pipe are respectively arranged on two sides of the upper end of the side wall of the tank body. The inner side end of the sodium cyanide aqueous solution feeding pipe and the inner side end of the chlorine feeding pipe are communicated and connected with the two sides of the upper end of the interior of the mixer respectively, a heating pipeline is arranged at the lower end of the interior of the tank body, and a heating grid is arranged at the position, corresponding to the heating pipeline, of the interior of the tank body; a heating grid is arranged in the tank body, a filler is arranged in the tank body and at the upper end of the heating grid, a gas output port is formed in the upper end of the tank body in a penetrating manner, a liquid output port is formed in the lower end of the tank body in a penetrating manner, and the heating pipeline and the heating grid are arranged, so that cyanogen chloride gas dissolved in a sodium chloride aqueous solution is further analyzed, and the production quality of the chlorination device is improved; the cyanogen chloride product purity is improved.

The invention discloses a method and a system for preparing cyanogen chloride based on continuous flow of a microchannel reaction device, under the condition of temperature control, a NaCN solution and chlorine are introduced into the microchannel reaction device for reaction, then gas-liquid separation, gas washing, drying, condensation and collection are performed to obtain a cyanogen chloride product, and a matched reaction system is provided. The microchannel reaction device is introduced into the reaction preparation process, the heat and mass transfer performance is improved through continuous flow, the heating time is shortened, and continuous production is achieved. No catalyst is used, reaction steps are simplified, and reaction cost is reduced.

The present invention is a method for producing a 2-amino-5-substituted-1, 3, 4-# imgabs0 # diazole, said method comprising the following steps (A) to (E), and a process for producing a 2-amino-5-substituted-1, 3, 4-# imgabs0 # diazole. A step (A) for preparing a cyanogen chloride solution from hydrogen cyanide and chlorine. And a step (B) in which the amount of the by-product hydrochloric acid, which is a by-product together with the cyanogen chloride in the step (A), is adjusted to 0.5 equivalents or less with respect to the generated cyanogen chloride. And (C) a step for reacting the carboxylic acid hydrazide with a cyanogen chloride solution to obtain a 2-amino-5-substituted-1, 3, 4-# imgabs 1 # diazole hydrochloride. And a step (D) in which an alkali is added to the solution obtained in step (C) in an amount equal to or greater than the sum of the amount of the by-product hydrochloric acid and the amount of the cyanogen chloride in the cyanogen chloride solution used in step (C). And a step (E) in which the solution containing the hydrochloride of the alkali obtained in step (D) is cooled and the precipitated crystals are separated. # imgabs2 #

The invention relates to the field of adsorbent preparation, in particular to a preparation method of a CNCl low-component ammonia-free impregnated activated carbon adsorbent. Comprising the following steps: a) screening metal active components, calculating the relationship between adsorption and reaction energy of surface intrinsic properties, such as an electronic structure and a geometric structure, of the metal active components on cyanogen chloride and intermediate product micromolecules thereof by using quantum chemistry, obtaining an optimal reaction substrate for cyanogen chloride hydrolysis reaction, and screening the active components; b) preparing a low-component ammonia-free impregnated activated carbon adsorbent; according to the impregnated activated carbon for protecting the CNCL, the intrinsic properties of metal are associated with micromolecule adsorption energy and reaction energy of the cyanogen chloride and intermediate products thereof through quantitative calculation, metal active components are screened according to calculation results, the obtained impregnated activated carbon for protecting the CNCL is good in chemical adsorption catalytic activity, the preparation method is simple in process, safe and controllable, the metal loading content is low, and the method is suitable for industrial production. The activity is high, and certain practicability and economical efficiency are achieved.

The invention belongs to the technical field of fine chemical engineering, and particularly relates to a preparation method of diphenylguanidine, which comprises the following steps: 1, simultaneously introducing aniline and cyanogen chloride into a tubular reactor, carrying out contact reaction on aniline and cyanogen chloride in the tubular reactor, controlling the temperature of the tubular reactor at 40-80 DEG C, and carrying out microwave-assisted reaction to obtain a diphenylguanidine crude product and hydrochloric acid, 2, filtering the crude product flowing out of the tubular filter again, and carrying out neutralization reaction on the feed liquid by adopting a sodium hydroxide solution, and 3, washing the feed liquid, and drying to obtain the diphenylguanidine. The diphenylguanidine can be prepared at a relatively low temperature, so that the energy consumption is remarkably reduced; in the synthesis process, a large amount of cyanogen-containing waste brine is not generated, and the harm to ecology is reduced.

The application provides a kind of alkali copper combined impregnated activated carbon for protecting CNCl / HCN and organic vapor and a preparation method, first, peach shell activated carbon with certain pore structure is selected, then impregnated in two steps, first, sodium alkali is impregnated into the inside of activated carbon carrier channel, then active component copper is impregnated into the inside of activated carbon carrier channel, wherein the oxide generated by thermal decomposition of Cu, Mo bimetallic impregnation solution has strong adsorption capacity for cyanide, the presence of alkali can promote the hydrolysis reaction of cyanogen chloride, and the hydrolysis product of adsorbed cyanogen chloride is hydrochloric acid. The unique pore structure of activated carbon and alkaline pretreatment are beneficial to the adsorption of DMMP organic vapor. The application first uses vacuum ultrasonic impregnation and water vapor activation to load the precursors of alkali and copper into the inside of macropore of activated carbon in turns, which not only makes the surface of impregnated carbon alkaline, but also makes the active component fully absorbed and dispersed in the channel of activated carbon.

The application discloses a preparation method of an adsorbing material for comprehensive protection of ethylene oxide and cyanogen chloride, and belongs to the technical field of adsorbents. The method uses activated carbon as a carrier, impregnates a basic metal complex solution for multiple times, and loads metal oxide components such as potassium, copper, zinc and silver in the pores of the activated carbon to obtain impregnated activated carbon with adsorption and catalysis functions. The impregnated activated carbon is mixed and packed with porous zeolite molecular sieves rich in acid sites to form a composite adsorbing material. The material can efficiently hydrolyze EO and CNCl which are difficult to be treated by conventional adsorbents, and has good application value in the fields of chemical protection and air purification.