81results about How to "Does not generate corrosive substances" patented technology

The invention relates to a preparation method of 2, 2-bis-[3-amino-4-(2, 4-dinitrophenoxy) phenyl] hexafluoropropane, comprising: (1) heating to reflux and segregate water for 6-18h to treat 2, 2-bis-(3-amino-4-hydroxy phenyl and 2, 4-dinitro halogenated benzene at a mol ratio of 1.0:2.0 to 2.2, in a system of salt forming agent and organic solvent, (2) concentrating reaction liquid, cooling the reactant system, adding water, precipitating solid product, filtering, washing and drying to obtain 2, 2-bis-[3-amino-4-(2, 4-dinitrophenoxy) phenyl] hexafluoropropane crystal. The preparation method of 2, 2-bis-[3-amino-4-(2, 4-dinitrophenoxy) phenyl] hexafluoropropane has simple operation, high yield and purity, wherein the solvent can be recovered easily and repeatedly used. The invention has low generation of three wastes and environment-friendly property, which is suitable for industrial production.

The invention relates to a BAHPP type polyimide humidity-sensitive capacitor and a preparing method thereof. The humidity-sensitive capacitor is composed of a substrate, a lower electrode, a BAHPP type humidity-sensing polyimide coating and an upper electrode, wherein 2, 2-bis(3-amino-4-hydroxyphenyl)propane (BAHPP), aromatic diamine and aromatic dianhydride react to obtain BAHPP type humidity-sensing polyimide. The preparing method comprises the steps of: placing the substrate into a drying box for drying after cleaning the substrate; carrying out drying; then preparing the lower electrode by means of vacuum vapor plating; guiding a lower electrode lead by JP-6 conductive adhesive; then coating a BAHPP type humidity-sensing polyimide precursor solution in a spin manner; carrying out imidization; preparing the upper electrode by means of vacuum vapor plating; carrying out slicing; flushing with deionized water; carrying out drying; carrying out screening; carrying out surface modifying; guiding an upper electrode lead with JP-6 conductive adhesive; and preparing the BAHPP type polyimide humidity-sensitive capacitor. The BAHPP type polyimide humidity-sensitive capacitor and the preparing method thereof has the advantages of high sensitivity, small humidity hysteresis, simple preparing process, low cost, good market prospect and the like.

The invention relates to a method for preparing 4, 4'-double (2, 4- dinitrophenoxy) sulfone, which comprises the steps that: (1) 4, 4'-dihydroxy diphenyl sulfone and 2, 4- dinitrohalobenzenes with a molar ratio ranging from 1.0 : 2.0 to 1.0 : 2.2 are subject to a heat refluxing and water diversion reaction for 6 to 18 hours in a system comprising salt forming agents and organic solvents; (2) the reaction solution is concentrated, the reactant system is cooled, and the water is added in the reactant system so as to precipitate the solid product; the obtained product is filtered, washed and dried so as to obtain 4, 4'-double (2, 4- dinitrophenoxy) sulfone. The invention has simple operations and high product yield and purity, the solvents can be conveniently recycled and can be repeatedly used with few wastes, and the invention is environmentally friendly and suitable for industrialized production.

The invention relates to a preparation method of 3, 3', 5, 5'- tetramethyl -4, 4'-double (2-trifluoromethane-4-nitrobenzene oxy) diphenyl. The invention comprises the following steps: (1) mixing 3, 3', 5, 5'-tetramethyl-4, 4'-dihydroxy diphenyl and 2-chlorine-5-nitryl trifluoromethyl benzene by the mol ratio of 1.0:2.0-2.6, and then adding the mixture into a mixed solvent of salifying agent, soluble organic solvent and non-soluble organic solvent for reaction for 4 to 15 hours at 100 to 180 DEG C; (2) filtering when the solvent is hot, eliminating filter residue, condensing mother liquid, cooling and stewing to precipitate a butter yellow solid product, and then filtering, washing and drying the product to obtain the butter yellow solid powder of 3, 3', 5, 5'-tetramethyl-4, 4'-double(2- trifluoromethyl-4-nitrobenzene oxy) diphenyl. The method with simple process, low cost, environment-friendliness and high purity and yield is applicable to the industrial production.

The invention relates to a method for preparing 4, 4'-bis (4-nitrophenoxy) diphenyl sulfide ether which comprises the steps: (1) 4,4'-thiobis-phenol and 4-halogenated nitrobenzene with the mol ratio of 1.00 to between 2.00 and 2.22 are subjected to heating reflux water separation reaction for 4 to 18 hours in a system formed by a salt forming agent and an organic solvent; and (2) reaction liquid is concentrated, a reactant system is cooled, water is added to precipitate a solid product, and the 4, 4'-bis (4-nitrophenoxy) diphenyl sulfide ether is obtained through filtration, washing and drying. The method has simple operation, and high yield and purity of products, ensures that the solvent is convenient to reclaim and can be repeatedly used, has less three wastes, is environment-friendly,and is suitable for industrialized production.

The invention relates to a method for making 4, 4'-bis (2,6-dinitro-4-trifluoromethylphenoxy)-3,3'5,5'-tetramethyldiphenyl, comprising the steps of: (1) carrying out heating, refluxing and water diversion of 4, 4'-dihydroxyl-3,3',5,5'-tetramethyldiphenyl and 2,6-dinitro-4-trifluoromethyl halogenated benzene mixed in a molar ratio of 1.0 : 2.0-2.2 in systems of salt forming agent and organic solvent for a reaction of 6 to 18 hours; (2) condensing reaction liquid, cooling a reactant system, adding water, separating out a solid product, and filtering, washing and drying the solid product to obtain 4, 4'-bis (2,6-dinitro-4-trifluoromethylphenoxy)-3,3'5,5'-tetramethyldiphenyl crystal. The invention has the advantages of simple operation, high product yield and high purity, convenient solvent recycling, repeated use, less three wastes, environment protection, and is suitable for industrialized production.

The invention relates to a preparation method of 3, 5-bi-(2, 4-dinitrophenoxy) benzotrifluoride, which comprises (1), heating, refluxing and water segregating for 3-18h to treat 3, 5-dihydroxy benzotrifluoride and 2, 4-dinitro halogenated benzene at the mol ratio of 1.0:2.0-2.2, in the system of salt forming agent and organic solvent, (2), condensing reaction liquid, cooling reactant system, adding water, precipitating solid product, filtering, washing and drying to obtain 3, 5-bi-(2, 4-dinitrophenoxy) benzotrifluoride. The preparation method of 3, 5-bi-(2, 4-dinitrophenoxy) benzotrifluoride has simple operation, high yield and purity, easily recovered and circulated solvent, less generation of three wastes, environment-friend property and application in industrial production.

The invention relates to a preparation method of 2, 2-double [4-(2-trifluoromethane-4-nitrobenzene oxy) phenyl] hexafluoropropane. The invention comprises the following steps: (1) mixing 2, 2-double(4-hydroxyl phenyl) hexafluoropropane and 2-chlorine -5-nitryl trifluoromethyl benzene by the mol ratio of 1.0:2.0-2.5, then adding the mixtrue into a mixed solvent of a salifying agent and anhydrous organic solvent for reaction for 5 to 10 hours at 110 to 200 DEG C; (2) filtering when the solvent is hot, eliminating filter residue, condensing mother liquid, cooling and stewing to precipitate a milky solid product, and then filtering, washing and drying the product to obtain the milky solid powder of 2, 2-double [4-(2-trifluoromethyl-4-nitrobenzene oxy) phenyl] hexafluoropropane. The method with simple process, low cost, environment-friendliness and high purity and yield rate is applicable to the industrial production.

The present invention relates to a preparation method of 1, 4-bi (2, 6-dinitro-4-trifluoromethyl phenoxy)-2, 5-di-tert-butyl benzene. The preparation method comprises the following steps: (1) 2, 5-di-tert-butyl hydroquinone and 2, 6-dinitro-4-trifluoromethyl halogenated benzene with the molar ratio of from 1.0 : 2.0 to 2.2 are put in the system of salt-forming agent and organic solvent for 6 to 18 hours with heated reflux reaction and water diversion; (2) the reaction solution is concentrated; the reaction system is cooled; water is added; solid products are separated, filtered, washed and dried to prepare the crystals of the 1, 4-bi (2, 6-dinitro-4-trifluoromethyl phenoxy)-2, 5-di-tert-butyl benzene. The preparation method has the advantages of simple operation, high yield of the product, high purity of the product, convenient recovery of the solvent that can be used repeatedly, less three-waste, less environmental pollution, and suitability for the industrial production.

The invention relates to a method for preparing 1,4-bis(2,6-binitro-4-trifluoromethylphenoxy)-2,6-dimethylbenzene, which comprises (1) allowing 2,6-dimethoxybenzene and 2,6-binitro-4-trifluoromethyl halogenated benzene at molar ratio of 1.0:(2.0-2.2) to react in a system of salifying agent and organic solvent while refluxing by heating for water separation for 6-18 hours; and (2) concentrating the reactant liquor, cooling the reactant system, adding water, adding water to separate out solid product, filtering, washing and drying to obtain product crystal. The method has simple process, convenient solvent recovery, repeated used of the solvent, less three wastes, environment friendliness, and suitability for industrialized production. The obtained product has high yield hand purity.