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 discloses a method for preparing parabenzoquinone dioxime, which comprises the following steps: 1) preparing sodium phenolate solution: mixing 5%-20% of NaOH solution and phenol solution and sodium nitrite solution, preparing the sodium phenolate solution, and adding sodium carbonate with a weight of 1 / 10 of the NaOH weight; 2) preparing parabenzoquinone monoxime, guiding the sodium phenolate solution into 28%-32% of acid liquor through a duct, and adding the sodium nitrite solution for the nitrosation reaction, the whole process being operated under the condition of -3 DEG C to 5 DEG C; 3) cleaning the solution, cleaning the prepared parabenzoquinone monoxime to neutral by using pure water, and measuring a decomposition point; 4) preparing the parabenzoquinone dioxime, adding water into the prepared parabenzoquinone monoxime and stirring, controlling the temperature within 45 DEG C to 62 DEG C, and pouring hydroxylamine and oximating and obtaining the product. The invention has the advantages that the reaction yield is high; the purity of target matter can reach 98 percent; and the content value of the nitrogen element in parabenzoquinone dioxime is not less than 20.26 percent.

Intrinsic black polyurethane with near-infrared photothermal effect and its preparation and application, raw materials and synthesis: After mixing multifunctional isocyanate and polyurethane catalyst evenly, add p-benzoquinone dioxime with the same functionality as isocyanate group to ensure The total number of moles of oxime functional groups in the system is equal to the number of moles of isocyanate groups, forming a highly cross-linked polymer network; put the mixed system into an internal mixer, and carry out internal mixing at 60-80°C for 4-10 hours to obtain a brown powder Material, the powder material is hot-pressed in a flat vulcanizer, the hot-pressing condition is 140-160 ° C, 4-6 MPa for 30-50 minutes, and a uniform intrinsic black film is obtained; the film is irradiated by near-infrared light Under the environment, it has a significant photothermal effect, and the large amount of heat generated after illumination can trigger the dynamic dissociation and reorganization of the dynamic oxime urethane bond, so that the cross-linked polyurethane can achieve fast and efficient welding and shape memory recovery, which can be applied in welding and The field of shape memory recovery.

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.

The invention relates to a butyl rubber composite gel oil absorption material and a preparation method thereof. A three-dimensional network spatial structure is formed by using butyl rubber as a base material, disulfur dichloride as a cross-linking agent and octyl phenol formaldehyde resin and parabenzoquinone dioxime as accelerants. The obtained oil absorption material is small in density, large in oil absorption, fast in rate of adsorption and capable of adsorbing multiple oil products; the oil absorption material can be repeatedly recycled through simple extrusion treatment, so that the cost is effectively reduced. The oil absorption material is a novel environmental-friendly material and widely applied and can be used for recovery of spilled oil in seaborne or land water bodies, treatment of oily wastewater and the like.

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.