MODIFICATION OF HIGH-ENERGY SUBSTANCES RECOVERED FROM PRODUCTS OF SOLID PROPELLANT DISPOSAL
DOI:
https://doi.org/10.15421/081922Keywords:
nitramine, solid propellant, crystallization, octogen, extraction, dimethyl sulfoxideAbstract
The main components of high-energy compositions are nitramines: octogen (HMX) & hexogen (RDX). The solution to the problem of the lack of these components is possible through the use of returnable resources, which are obtained using a certain technology for the disposal of solid rocket fuel and ammunition, unsuitable for further use for its intended purpose. The purpose of this research is to develop a crystallization method for octogen extracted from solid rocket fuel and to obtain modified nitramine suitable for use in high-energy compositions (HEC). The parameters of the process of recrystallization of the extracted nitramine from an aqueous solution of dimethyl sulfoxide (DMSO) were determined in the laboratory: the dependence of the average particle size of the substance on the rotational speed of the mechanical stirrer and the cooling rate of the solution. The required crystal size of the modified nitramine is obtained in the process of crystallization with a rotational speed of a mechanical stirrer in the range of 200 – 330 rpm and a cooling rate of an aqueous solution of DMSO not higher than 2 °C / min, it was found. Addition of seed crystals of standard nitramine up to 10 % (by weight) and 0.5 % (by weight) modifier (isomethyltetrahydrophthalic anhydride) positively affects the crystalline form of the modified product with the formation of crystals of predominantly correct isometric form. The resulting modified nitramine has characteristics that satisfy the requirements for use in HЕC.References
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