8 results about "Cyclododecane" patented technology

The invention relates to the technical field of cyclododecanol production, in particular to a method for inhibiting by-product cyclododecane in a cyclododecanol hydrogenation preparation process, which comprises the following steps: mixing one or more of cyclododecanone, epoxy cyclododecane or epoxy cyclododecene as raw materials with a solvent to prepare a raw material solution; the raw material liquid is subjected to a hydrogenation reaction, cyclododecanol is prepared, and the water content in the raw material liquid is 3-15 wt%. By adopting the technical scheme provided by the invention, on the premise of not changing the catalyst and the reaction system, the water content in the raw material liquid is controlled to be 3-15wt%, so that the water content of the reaction system in the reaction process is in a proper range, the generation of a byproduct cyclododecane can be effectively inhibited, and the yield of cyclododecanol is obviously improved; and the yield of the byproduct cyclododecane is reduced, so that the heat load of the tower kettle of the light component removal tower can be reduced by 20-50%.

The present invention relates to a method for preparing hydrocarbon double acids using a cyclic hydrocarbon oxidation catalyst, wherein adipic acid and dodecanedioic acid may be produced with high yield while solving the problem of environmental pollution, the adipic acid and the dodecanedioic acid being prepared by using an oxidation reaction of a cyclohexane-cyclohexanone mixture and an oxidation reaction of a cyclododecane-cyclododecanone mixture, respectively, in the presence of a vanadium phosphate oxide-based catalyst and / or a cobalt-manganese oxide-based catalyst.

The invention discloses a foamed mica composite material and a preparation method thereof. The preparation method comprises the following steps: weighing mica, styrene, benzoyl peroxide, 6-Br cyclododecane, tert-butyl peroxybenzoate, calcium hydrophosphate and a nucleating agent, and putting the weighed materials into a 1L autoclave; stirring at normal temperature and normal pressure; heating and gradually raising the temperature to carry out in-situ prepolymerization; adding a dispersing agent system, heating to 80-100 DEG C, and keeping the temperature for 140 minutes; checking whether the beads sink and harden in normal-temperature water or not, if the beads sink and harden, adding 1g of hydroxy calcium phosphate powder and sealing the kettle; 12-16 g of pentane is added through a pressure balance feeding device, the mixture is heated to 117 DEG C, and the temperature is kept for 240 min; cooling to room temperature with cold water, discharging, drying and screening to obtain the SEPS composite beads, and preparing a composite foam board according to the SEPS composite beads, so that the heat conductivity coefficient of the prepared composite material is reduced.

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.

The invention provides a controllable synthesis method of 1, 4, 7, 10-tetraazacyclododecane pentazole salt, and belongs to the technical field of energetic materials, the controllable synthesis method comprises two synthesis methods, one is synthesis of 1, 4, 7, 10-tetraazacyclododecane dipentazole salt: 1, 4, 7, 10-tetraazacyclododecane tetrahydrochloride is dissolved in deionized water, pentazole silver powder with the equivalent weight not less than 4 is added, ultrasonic and light-shielding reaction is carried out, and the 1, 4, 7, 10-tetraazacyclododecane dipentazole salt is obtained; filtering, precipitating, and concentrating filtrate to synthesize; the other method is synthesis of 1, 4, 7, 10-tetraazacyclododecane pentazole nitric acid composite salt, and the difference between the 1, 4, 7, 10-tetraazacyclododecane pentazole nitric acid composite salt and the 1, 4, 7, 10-tetraazacyclododecane pentazole nitric acid composite salt is that 1 equivalent of silver nitrate and not less than 3 equivalent of According to the method, the adding amount of the silver salt is regulated and controlled, the 1, 4, 7, 10-tetraazacyclododecane tetrahydrochloride is directly used as the raw material, and the bis-pentazole salt and the pentazole nitric acid composite salt are synthesized in one step, so that the problems that the raw material is difficult to synthesize and the product structure is uncontrollable are solved, and a foundation is laid for large-scale preparation and application of energetic materials.

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.

This invention provides a novel compound that can effectively prevent the proliferation of drug-resistant hepatitis B viruses. [Solution] A hydrophobic tag and morphothiazine, which is an allosteric modulator of the hepatitis B virus core protein, are linked by a linker. The ring-type carbocyclic is any of the following: adamantane ring, norbornene ring, norbornane ring, perhydroindene ring, decalin ring, perhydrofluorene ring, perhydroanthracene ring, perhydrophenanthrene ring, tricyclodecane ring, tricycloundecane ring, tetracyclododecane ring, perhydroacenaphthene ring, or perhydrophenalene ring. The novel compound according to the present invention can effectively suppress the proliferation of drug-resistant HBV.