37 results about "Cyanogen halide" patented technology

The present invention provides for a method to prepare a pressure stable and pH stable medium for use in high pressure (performance) affinity chromatography. The method includes the steps of treating hydroxyalkyl-silica with cyanogen halides or other cyanogen transfer reagents in the presence of an organic base in anhydrous solvents at temperatures in the range of from about -15° C. to about 20° C. for a period of time in the range of from about 1 minute to about 5 minutes, and washing the resulting medium in anhydrous solvent.

5-Substituted-8-alkoxy[1,2,4]triazolo[1,5-c]pyrimidin-2-amines are manufactured from 2-substituted-4-amino-5-methoxypyrimidines in a process that avoids hydrazine and cyanogen halide.

Semi-quantitative colorimetric analysis of a fibrous matrix disposed on a support, and quantitative analysis of liquid color, are described. Cyanide and a halogenating reagent are reacted to produce a cyanogen halide, and Konig reagents are reacted with the cyanogen halide to yield a colorimetrically analyzable complex. A beneficial photometric method is also described. In addition, a reagent delivery device that includes a beneficial fibrous matrix for rapid delivery of reagents and rapid liquid color analysis, is described.

The present invention belongs to the field of organic polymer material synthesis, and particularly relates to a bisphenol A type cyanate resin monomer synthesis method, which specifically comprises: dissolving bisphenol A in an alkane organic solvent containing 5-8 c atoms; spraying the bisphenol A solution, cyanogen halide and triethylamine into a reaction container achieving turbulent flow through different feeding pipelines at a high speed, wherein a molar ratio of the bisphenol A to the cyanogen halide to the triethylamine is 1:1.1-1.5:1.2-1.9, the reaction temperature is -5 to 15 DEG C, and the reaction time is 3-15 min; and after completing the reaction, self-precipitating the bisphenol A cyanate without application of other methods to extract. According to the present invention, the bisphenol A type cyanate resin monomer preparation method is achieved.

A method for efficiently producing a cyanogen halide with suppressed side effects, and a method for producing a high-purity cyanate ester compound at a high yield includes contacting a halogen molecule with an aqueous solution containing hydrogen cyanide and / or a metal cyanide, so that the hydrogen cyanide and / or the metal cyanide is allowed to react with the halogen molecule in the reaction solution to obtain the cyanogen halide, wherein more than 1 mole of the hydrogen cyanide or the metal cyanide is used based on 1 mole of the halogen molecule, and when an amount of substance of an unreacted hydrogen cyanide or an unreacted metal cyanide is defined as mole (A) and an amount of substance of the generated cyanogen halide is defined as mole (B), the reaction is terminated in a state in which (A):(A)+(B) is between 0.00009:1 and 0.2:1.

The invention discloses a method for preparing and purifying cyanate, which comprises dissolving the dihydroxy compound into dissolvent, reacting with cyanogen halide at the presence of acid absorption agent, obtaining corresponding cyanate product, removing by-product through filtering or washing, subjecting the cyanate solution to decompression concentration, stirring and cooling, separating white crystal, then carrying out filtration, scouring and drying.

The present invention provides a category of phenolphthalein-cyanate resin and a preparation method thereof. The structure of the cyanate resin is shown in the right; wherein, the substituents from R1 to R6 can be hydrogen atom, halogen atom, nitro, or the same or different fat alkanes from C1 to C20 and derivatives thereof, or the same or different arenes from C6 to C12 and derivatives thereof. In the preparation method, cyanate monomer and derivatives thereof react with cyan halide to prepare the phenolphthalein-cyanate resin. The cyanate monomer is cured at the temperature between 120 DEG C and 300 DEG C to prepare poly cyanic ester. The cyanate monomer with the structure of phenolphthalein has high reaction activity and wide processing window. The temperature of the initial thermal loss of the poly cyanic ester is above 400 DEG C. The cyanate monomer can be used a suitable matrix for preparing a category of novel high-performance polymer materials and can be used in printed circuit boards, materials of aerospace, and other field.

A process for synthesizing high-purity cyanate ester resin with high output rate features that the cyanogen halide, triethylamine and phenol compound are used as raw materials, the ketone, alcohol, substituted benzene, or haloform is used as solvent, and the solution is triethylamine and phenol compound in acetone is dripped in the solution of cyanogen halide in acetone at temp lower than 10 deg.C. Its advantages are easy control, high output rate greater than 96.5% and high purity (more than 99%).

The invention provides an aromatic cyanate ester monomer containing silicon and a preparation method thereof. The structure of the cyanate ester resin monomer is as above; in the formula, n is the integer between 2 and 4. The cyanate ester resin monomer is prepared by taking the chlorosilane as the original material, synthesizing an aromatic polyphenol monomer containing silicon, then reacting with the cyan halide. The aromatic cyanate ester monomer containing silicon has high reaction activity. The prepared resin has good thermooxidation resistance and the humidity resistance, is suitable as a substrate for a new high performance polymer composite material and is applied to the fields of the printed circuit board and the aerospace material, wherein the polyfunctional group resin is especially suitable for the low dielectric coefficient material and the polyporous material field owing to the special space network structure.

The invention relates to naphthol phenolic cyanate ester resin and a synthesis method thereof. The structural formula of the naphthol phenolic cyanate ester resin is shown in the specification, wherein R1, R2 and Rr are H atom, alkyl or aralkyl; and n is an integer of 1-50. The naphthol phenolic cyanate ester resin is prepared by taking naphthol phenolic resin and cyanogen halide as raw materials and taking trialkylamine as a catalyst. The prepared naphthol phenolic cyanate ester resin can be applied in the fields of high-end composite materials, high-frequency circuit substrates, IC (Integrated Circuit) package substrates, and the like.

The invention relates to a method for producing chlorosulfonyl isocyanate by taking cyanogen chloride and sulfur trioxide as raw materials, belonging to the methods for producing chlorosulfonyl isocyanate. The method comprises the following steps: feeding the raw materials into a tubular reactor at a theoretical molar ratio, enabling the raw materials to react continuously in the tubular reactor, feeding the by-products of reaction into a tubular thermal decomposition reactor of by-products, continuously converting the by-products of reaction to the desired product, separating the crude product, and purifying to obtain the high-purity chlorosulfonyl isocyanate. The method provided by the invention can realize the production of the chlorosulfonyl isocyanate through continuous reaction in the tubular reactor, and the method has the advantages of low investment in devices, high production efficiency and strong production capacity. The advanced production process is adopted to produce the chlorosulfonyl isocyanate, a few by-products are generated during reaction in the tubular reactor, and the by-products can be completely converted into the target product through thermal decomposition reaction. No by-product is sent out of the bound in addition to the impurities involved into the raw materials in the production process, the utilization rate of the raw materials is high, the product has high quality, the production process is stable, and the method is easy to operate and has large operating flexibility.

The invention relates to alkyl dimethylbenzene cyanic acid ester resin as well as a preparation method and an application thereof. The particular preparation method comprises the following steps: hydroxybenzene alkyl dimethylbenzene resin and cyan halide are taken as raw materials and tri-ethylamine is taken as the catalyst for preparation. The prepared alkyl dimethylbenzene cyanic acid ester resin undergoes solidifying reaction under relatively low temperature under the action of proper catalyst and heat; the solidifying degree after post-treatment can exceed 90 percent, and the materials achieved by solidification have excellent dielectric property, moisture and heat resisting performance and mechanical performance, and the like, and are applicable to the fields of aerospace aircraft, satellite, gantry radar antenna cover, high-performance printed circuit board, and the like.

The invention belongs to the technical field of synthesis of cyanate type compounds and relates to a preparation method of a fluorine-containing cyanate monomer. The method comprises the following steps: step 1, adding a solvent and cyanogen halide; stirring to completely dissolve the cyanogen halide; step 2, under violent stirring, slowly dropwise adding triethylamine and a solution of a fluorine-containing bisphenol compound, wherein the dropwise adding speed of the triethylamine is slightly smaller than the dropwise adding speed of the fluorine-containing bisphenol compound; controlling thereaction temperature to be -20 to 0 DEG C; finishing dropwise adding after 2 to 10 h; then continually stirring for 1 to 3 h and stopping reaction; step 3, after standing for 1 to 5 h, filtering to obtain a fluorine-containing bisphenol cyanate resin crude product and then purifying. The invention provides the method for synthesizing the fluorine-containing cyanate monomer so that the preparationof the fluorine-containing cyanate monomer becomes possible.

The invention discloses a novel tetrazolium compound and its metal salt derivative, and preparation methods of the above compounds, and belongs to the fields of novel chemical materials and preparation technologies thereof. 5-(1'-methyl)hydrazinotetrazolium is prepared through reacting a cyanogen halogenide with sodium azide in a solvent, and reacting the resultant mixed solution / filtrate with methylhydrazine in the solvent. The metal salt of the 5-(1'-methyl)hydrazinotetrazolium is obtained through reacting 5-(1'-methyl)hydrazinotetrazolium / sodium 5-(1'-methyl)hydrazinotetrazolium with a metal hydroxide / metal sulfate / metal nitrate in water. The 5-(1'-methyl)hydrazinotetrazolium and the 5-(1'-methyl)hydrazinotetrazolium metal salt derivative prepared in the invention have a high nitrogen content and a good stability, can be used in energetic materials, can have magnetic characteristics, and have the advantages of simple preparation process and high purity.

The invention belongs to the technical field of an advanced composite material science, and particularly relates to a boride ceramic in-situ filling cyanate ester resin base composite material and a preparation method thereof. By an in-situ polymerization method, firstly, bisphenol A is dissolved in a benzene or alkane type organic solvent; a certain amount of cyanogen halide is added; mechanical stirring is performed in an environment being -10 to 0 DEG C to obtain a mixed solution; under the strong stirring, metal boride ceramic powder is added into the mixed solution; the stirring is continuously performed; at -10 to 0 DEG C, triethylamine is dropwise added into the system; the system takes polymerization; after the organic solvent is removed through distillation, metal boride powder in-situ filling cyanate ester resin is obtaine; then, a catalyst is added for stirring; after vacuum degassing treatment, curing formation is performed at a high temperature. The prepared metal boride in-situ filling cyanate ester resin base composite material has the structure performance characteristics of uniform material tissue, heat resistance and excellent heat conduction performance, and can be used as a base board material, an encapsulating material and the like of a printed circuit board in electronic equipment for space navigation industry and aerospace industry.

The present invention belongs to the field of organic polymer material synthesis, and particularly relates to a bisphenol A type cyanate resin monomer synthesis method, which specifically comprises: dissolving bisphenol A in an alkane organic solvent containing 5-8 c atoms; spraying the bisphenol A solution, cyanogen halide and triethylamine into a reaction container achieving turbulent flow through different feeding pipelines at a high speed, wherein a molar ratio of the bisphenol A to the cyanogen halide to the triethylamine is 1:1.1-1.5:1.2-1.9, the reaction temperature is -5 to 15 DEG C, and the reaction time is 3-15 min; and after completing the reaction, self-precipitating the bisphenol A cyanate without application of other methods to extract. According to the present invention, the bisphenol A type cyanate resin monomer preparation method is achieved.

A method for efficiently producing a cyanogen halide with suppressed side effects, and a method for producing a high-purity cyanate ester compound at a high yield includes contacting a halogen molecule with an aqueous solution containing hydrogen cyanide and / or a metal cyanide, so that the hydrogen cyanide and / or the metal cyanide is allowed to react with the halogen molecule in the reaction solution to obtain the cyanogen halide, wherein more than 1 mole of the hydrogen cyanide or the metal cyanide is used based on 1 mole of the halogen molecule, and when an amount of substance of an unreacted hydrogen cyanide or an unreacted metal cyanide is defined as mole (A) and an amount of substance of the generated cyanogen halide is defined as mole (B), the reaction is terminated in a state in which (A):(A)+(B) is between 0.00009:1 and 0.2:1.

5-Substituted-8-alkoxy[1,2,4]triazolo[1,5-c]pyrimidin-2-amines are manufactured from 2-substituted-4-amino-5-methoxypyrimidines in a process that avoids hydrazine and cyanogen halide.

The invention belongs to the technical field of an advanced composite material science, and particularly relates to a boride ceramic in-situ filling cyanate ester resin base composite material and a preparation method thereof. By an in-situ polymerization method, firstly, bisphenol A is dissolved in a benzene or alkane type organic solvent; a certain amount of cyanogen halide is added; mechanical stirring is performed in an environment being -10 to 0 DEG C to obtain a mixed solution; under the strong stirring, metal boride ceramic powder is added into the mixed solution; the stirring is continuously performed; at -10 to 0 DEG C, triethylamine is dropwise added into the system; the system takes polymerization; after the organic solvent is removed through distillation, metal boride powder in-situ filling cyanate ester resin is obtaine; then, a catalyst is added for stirring; after vacuum degassing treatment, curing formation is performed at a high temperature. The prepared metal boride in-situ filling cyanate ester resin base composite material has the structure performance characteristics of uniform material tissue, heat resistance and excellent heat conduction performance, and can be used as a base board material, an encapsulating material and the like of a printed circuit board in electronic equipment for space navigation industry and aerospace industry.

2-Amino-5,8-dialkoxy[1,2,4]-triazolo[1,5-c]pyrimidines are manufactured from 4-chloro-2,5-dialkoxypyrimidines in a process that avoids hydrazine and cyanogen halide.

The invention discloses a novel tetrazole compound and a metal complex thereof, and preparation methods of the compounds, and belongs to technical fields of novel chemical materials and preparation thereof. The preparation method of the 5-amino-1-benzamido tetrazole comprises the steps that cyanogen halogenide reacts with sodium azide in a solvent; the obtained mixed solution / filtrate reacts with benzoyl hydrazine in the solvent, so as to prepare 5-amino-1-benzamido tetrazole. The 5-amino-1-benzamido tetrazole reacts with a metal salt in the solvent, so as to obtain the product, namely the metal complex of the 5-amino-1-benzamido tetrazole. The 5-amino-1-benzamido tetrazole has multi-point coordination characteristics and good stability. The 5-amino-1-benzamido tetrazole and the metal complex thereof are simple in preparation process, easy to operate and high in product purity, and play important roles in application as a ligand and a functional material.

The present invention relates to a method for concentrating an aqueous starting solution of hydrogen halide, in particular hydrochloric acid, comprising the following steps: - in a distillation unit (12), in the presence of an extractant, the aqueous starting solution of hydrogen halide extractive distillation of the solution, removal of hydrogen halide vapor and / or hydrogen halide gas (38) from the upper section of the distillation unit, removal of the extractant-containing solution (24) from the lower section of the distillation unit, - concentration of the extractant-containing solution removed from the lower section of the distillation device in the evaporation device (14), and - return of the extractant-containing solution concentrated in the evaporation device to the distillation device (22), · wherein said extractant-containing solution removed from the lower stage of the distillation device is concentrated by evaporation in said evaporation device at a pressure higher than atmospheric pressure.

The invention provides a composite material, a preparation method thereof and a quantum dot light emitting diode. The composite material comprises metal oxide nanoparticles and organic molecules combined on the surfaces of the metal oxide nanoparticles, wherein the organic molecule is selected from an epihalohydrin compound molecule, a vinyl sulfone compound molecule, a cyanogen halide compound molecule, a trifluoroalkane sulfonyl halide compound molecule, carbonyl imidazole or disuccinimido carbonate. The surface of the composite material is provided with stable organic molecules, when the composite material is used as an electron transport layer of a quantum dot light emitting diode, good transmission performance can be kept in a working state, the organic molecules on the surface of thecomposite material are not prone to falling off, and the stability of a device can be improved.

A pre-polymer composition and methods of making and using the composition are provided. The composition may include a reaction product of polyhydroxystyrene and cyanogen halide, wherein the product includes a plurality of cyanate ester moieties.

The present invention relates to a novel structure of alkyl diphenyl ether type cyanate and its preparation method and application. The specific preparation method is to use hydroxyphenyl alkyl diphenyl ether and cyanogen halide as raw materials and use triethylamine as catalyst to prepare have to. Under the action of appropriate catalyst and heat, the prepared cyanate can undergo curing reaction at relatively low temperature. After the post-treatment process, the curing degree of the material can reach more than 90%. The material has excellent dielectric properties, heat and humidity resistance, thermal properties and mechanical properties. It can be used in aerospace vehicles, satellites, radome and high-performance printed circuits. board and other fields.