Abstract:
The process of the present invention provides a method of obtaining a high yield of water or acid soluble nitrate esters without the use of organic solvents in the nitration reaction or the production of unstable products or by-products. The process involves the nitration of an organic hydroxy-containing compound with a suitable nitrating agent such as nitric acid in the absence of organic solvents in the nitration reaction. The reaction mixture is neutralized, causing the nitrate esters to precipitate or separate from the neutralized nitrate solution. The nitrate ester is then recovered, and any dissolved nitrate salts can be removed therefrom by gentle washing with water or a dilute halide solution. As provided by the process of the present invention, no organic solvents are used in the nitration reaction and average yields range from about 80% to about 95%.
Abstract:
A process for the production of a high energy material involves reacting, in an inert organic solvent, a heterocyclic compound selected from oxirane, aziridine, oxetane or azetidine with a nitrogen oxide selected from dinitrogen tetroxide (N.sub.2 O.sub.4) and dinitrogen pentoxide (N.sub.2 O.sub.5) and, when the nitrogen oxide is N.sub.2 O.sub.4, oxidizing the O- or N- nitroso substituent or substituents in the product obtained to O- or N- nitro substituent or substituents. The heterocyclic compounds may be substituents or unsubstituted. In the former case the preferred substituents groups are halogen, alkyl, alkenyl, nitro and epoxy (as in epoxidized polybutadiene). The solvent is preferably a chlorinated alkane.Novel nitrated derivatives of polybutadiene, in which between 1% and 25% of the carbon atoms in the polymer are substituted by nitrate (ONO.sub.2), are also provided. These novel materials are liquid rubbers when the polybutadiene starting material has a molecular weight between 2000 and 10000.
Abstract translation:用于生产高能材料的方法包括在惰性有机溶剂中使选自环氧乙烷,氮丙啶,氧杂环丁烷或氮杂环丁烷的杂环化合物与选自四氧化二氮(N 2 O 4)和五氧化二氮(N 2 O 5)的氮氧化物反应, 当氮氧化物是N 2 O 4时,将获得的产物中的O-或N-亚硝基取代基或取代基氧化成O-或N-硝基取代基。 杂环化合物可以是取代基或未取代的。 在前一种情况下,优选的取代基是卤素,烷基,烯基,硝基和环氧基(如在环氧化的聚丁二烯中)。 溶剂优选为氯化烷烃。 还提供了聚合物中1%至25%的碳原子被硝酸(ONO 2)取代的聚丁二烯的新型硝化衍生物。 当聚丁二烯起始材料的分子量在2000和10000之间时,这些新型材料是液体橡胶。
Abstract:
By hydrolyzing a sulfonic acid ester or a nitric acid ester of an optically active 4-hydroxy-2-cyclopentenone, the steric inversion of the hydroxyl group at the 4-position of the cyclopentenone mentioned above is effected.4-hydroxy-2-cyclopentenone is useful as a raw material of prostaglandins (natural substance is an (R)-substance) having stimulative action to uterine muscle and vasodilator action. For instance, 4(S)-hydroxy-2-cyclopentenone can be configurationally inverted to R-isomer. Accordingly, this method is extremely meaningful in the synthesis of prostaglandins.
Abstract:
Organic nitrogen compounds are formed in the vapor phase by organic radical formation by reaction of an organic compound, suitably an alkane, with hydroxyl radicals derived from the reaction between hydrogen peroxide and nitrogen dioxide and the nitration of the organic radicals, suitably with nitrogen dioxide. The process is conducted using a molecular oxygen additive which directs the reaction towards the formation of the nitrate corresponding to the organic compound which may predominate in the organic reaction products.
Abstract:
Blasting oil contained in the effluent from the production of explosives containing nitroglycerine is recovered by extracting with nitroaromatics which make part of the final explosive, the resulting extract being used completely in the explosive production. Residues of nitroaromatics may be removed from the purified effluent by means of an extraction liquid being sparely water-soluble, such as toluene or xylene or a mixture thereof.
Abstract:
Cycloaliphatic nitrates are produced by dissolving cycloaliphatic alcohols in an indifferent solvent and then treating them in this solution with nitrating acid. A suitable temperature range for the reaction is between +20 DEG and -40 DEG C., preferably between -5 DEG and -10 DEG C. Suitable cycloaliphatic alcohols are cyclopentanol, cyclohexanol, cyclo-octanol, cyclodecanol, decahydronaphthol, the isomers of methyl cyclohexanol and dimethylcyclohexanol and mixtures of such alcohols. Examples of indifferent solvents are aliphatic halogenated hydrocarbons, such as chloroform, carbon tetrachloride and ethylene chloride, or aliphatic hydrocarbons, such as petroleum ether, hexane, or heptane, or cyclic hydrocarbons, such as methylcyclopentane, cyclohexane, methylcyclohexane, dimethyl cyclohexane or mixtures thereof. The alcohol is dissolved in the solvent in a ratio of 1 part alcohol to 1, 2, 3 or more parts of solvent. The nitrating acid is a mixture of 1 part of concentrated nitric acid to 1, 2, 3 or more parts of concentrated sulphuric acid. The nitration may be carried out continuously by leading the reactants through a tubular coil at the desired temperature. In examples: (1) cyclohexanol dissolved in carbon tetrachloride is introduced rapidly with stirring into a nitrating acid mixture cooled to -5 DEG to -10 DEG C., and the organic layer is washed with water and soda solution and fractionally distilled to obtain cyclohexanol nitrate; methylcyclohexanol nitrate and dimethylcyclohexanol nitrate are similarly obtained; (2) cyclopentanol dissolved in chloroform is nitrated as in (1) and poured on to crushed ice, the organic layer is washed with sodium bisulphite to remove cyclopentanone, then with water and soda and then is fractionally distilled to obtain cyclopentanol nitrate; cyclo-octanol nitrate is similarly obtained; (3) decahydronaphthol nitrate is obtained by the process of (1). The products are valuable fuel additives.