34 results about "P-benzoquinone dioxime" patented technology

The invention provides a manufacture method of p, p-dibenzoylquinone dioxime compounds. According to the manufacture method, dimethoxyethane is used as solvents, benzoquionone dioxime and benzoyl chloride are used as raw materials to be reacted, and in addition, acid-binding agents are added in the reaction for manufacture. The reaction equation is shown as the accompanying drawing. The solvents used in the method provided by the invention are the dimethoxyethane, the boiling point is higher, the volatilization is not easy to occur, the total recovery can be realized, the utilization rate is high, a small number of the acid-bonding agents are added, the yield is improved and reaches higher than 95 percent (the reported yield in the prior art is about 78 percent), the product purity is high, the purity can reach higher than 95 percent with no need of the recrystallization of products, the reaction is carried out at the room temperature, the production cost is low, the operation is convenient, and the method is suitable for industrial production.

The invention provides a method for preparing parabenzoquinone dioxime, and relates to a method for enzymatically synthesizing the parabenzoquinone dioxime. The method comprises the following steps of: carrying out nitrosation on phenol dissolved in solution of NaOH with sodium nitrite to prepare parabenzoquinone monooxime in the presence of certain concentration of sulfuric acid; and then addinghydroxylamine into the prepared parabenzoquinone monooxime for oximation to prepare the parabenzoquinone dioxime. When the parabenzoquinone monooxime is prepared, a reverse addition method is adopted, namely mixing 5 to 20 percent solution of NaOH dissolved with the phenol and 93 to 97 percent solution of sodium nitrite at the temperature of between 3 DEG C below zero and 5 DEG C; then leading the mixture into 5 to 20 percent solution of sulfuric acid through a conduit at the temperature of between 3 DEG C below zero and 5 DEG C; and adding calcined soda into the solution of NaOH dissolved with the phenol. The method has the advantages that: the reaction yield is high, the purity of the target can reach 98 percent, and the nitrogen element content in the parabenzoquinone dioxime can be more than or equal to 20.26 percent; the method not only effectively improves the contents of nitrogen, hydrogen and carbon of products, but also effectively improves product quality stability. The method has superior technological properties that cannot be replaced by other vulcanization systems.

An anti-fake bill allowing codes to be changeable comprises an upper bill paper layer 1 and a lower bill paper layer 2, wherein a chip groove 4 and an annular frame groove 5 are formed in the upper portion of the lower bill paper layer 2, a chip 3 is arranged in the chip groove 4, a metal frame 6 is arranged in the frame groove 5, and the space between the frame groove 5 and the metal frame 6 is filled with a glue strip 7. The glue strip 7 is composed of, part by weight, 60-70 parts of methacrylic acid, 5-20 parts of acrylic acid, 20-30 parts of diethylene glycol, 3-6 parts of benzoyl, 0.5-2 parts of methyl toluidine, 0.1-0.3 part of benzoquinone, 2-4 parts of xylopropamine, 1-4 parts of dicumyl peroxide, 0.1-0.5 part of saccharin, 3-6 parts of triethylamine, 0.1-0.3 part of white carbon black, 1-4 parts of ethyl acetate, 0.5-3 parts of propylgallate, 0.3-0.9 part of p-benzoquinone dioxime, 1-3 parts of polysulfone resin and 0.2-0.6 part of 8-hydroxyquinoline. The metal frame serves as a support in the bill, the chip is located in the space defined by the metal frame in an enclosed mode, external force on the bill is resisted, the bill is prevented from being bent to be deformed or damaged, and completeness of the chip is guaranteed.