3 results about "Cyclododecane" patented technology

This invention provides a controllable synthesis method for 1,4,7,10-tetraazacyclododecanepentazole salt, belonging to the field of energetic materials technology. It includes two synthesis methods: the first is the synthesis of 1,4,7,10-tetraazacyclododecane dipentazole salt, in which 1,4,7,10-tetraazacyclododecane tetrahydrochloride is dissolved in deionized water, at least 4 equivalents of silver pentazole powder are added, the reaction is performed ultrasonically and in the dark, the precipitate is filtered, and the filtrate is concentrated to obtain the product; the second is the synthesis of 1,4,7,10-tetraazacyclododecane pentaazole nitrate complex salt, which differs from the first in that 1 equivalent of silver nitrate and at least 3 equivalents of silver pentazole powder are added. This invention, by controlling the amount of silver salt added, directly synthesizes dipentazole salt and pentaazole nitrate complex salt from 1,4,7,10-tetraazacyclododecane tetrahydrochloride in one step, solving the problems of difficult raw material synthesis and uncontrollable product structure, laying the foundation for the large-scale preparation and application of energetic materials.

The application discloses a preparation method of high-purity cyclododecanone, and steps of the method comprise the following steps: 1) cyclododecanol is subjected to a dehydrogenation reaction under the action of a dehydrogenation catalyst to obtain a dehydrogenation reaction liquid rich in cyclododecanone; 2) the dehydrogenation reaction liquid is introduced into cyclopentyl methyl ether, cyclododecanone solid is precipitated, then solid-liquid separation is carried out, and the solid is subjected to vacuum rectification after being melted to obtain high-purity cyclododecanone. The method can prepare a cyclododecanone product with a purity of greater than or equal to 99.998%, impurities cyclododecane and cyclododecene can be controlled at an extremely low level, and the anti-yellowing capacity of the product is significantly enhanced.

This application relates to the field of cultural relic restoration, specifically disclosing a method for sealing inscriptions on cultural relics during restoration. The method includes the following steps: heating menthol crystals until completely melted to obtain a menthol melt; then applying the menthol melt to the inscriptions to be sealed; and finally, after the menthol melt cools and solidifies, the sealing is complete. This method utilizes menthol crystals instead of cyclododecane, effectively sealing the inscriptions on cultural relics. The sealed inscriptions exhibit significant water resistance, do not diffuse upon contact with water, and improve the tensile strength of the simulated archival paper after restoration and mounting. Simultaneously, it has no negative impact on paper fibers, and leaves no residual new chemical substances on the paper.