Document Detail


Ultrasonically controlled particle size distribution of explosives: a safe method.
MedLine Citation:
PMID:  17532248     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
Size reduction of the high energy materials (HEM's) by conventional methods (mechanical means) is not safe as they are very sensitive to friction and impact. Modified crystallization techniques can be used for the same purpose. The solute is dissolved in the solvent and crystallized via cooling or is precipitated out using an antisolvent. The various crystallization parameters such as temperature, antisolvent addition rate and agitation are adjusted to get the required final crystal size and morphology. The solvent-antisolvent ratio, time of crystallization and yield of the product are the key factors for controlling antisolvent based precipitation process. The advantages of cavitationally induced nucleation can be coupled with the conventional crystallization process. This study includes the effect of the ultrasonically generated acoustic cavitation phenomenon on the solvent antisolvent based precipitation process. CL20, a high-energy explosive compound, is a polyazapolycyclic caged polynitramine. CL-20 has greater energy output than existing (in-use) energetic ingredients while having an acceptable level of insensitivity to shock and other external stimuli. The size control and size distribution manipulation of the high energy material (CL20) has been successfully carried out safely and quickly along with an increase in the final mass yield, compared to the conventional antisolvent based precipitation process.
Authors:
Mohan Narayan Patil; G M Gore; Aniruddha B Pandit
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2007-04-14
Journal Detail:
Title:  Ultrasonics sonochemistry     Volume:  15     ISSN:  1350-4177     ISO Abbreviation:  Ultrason Sonochem     Publication Date:  2008 Mar 
Date Detail:
Created Date:  2007-11-13     Completed Date:  2008-03-31     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9433356     Medline TA:  Ultrason Sonochem     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  177-87     Citation Subset:  -    
Affiliation:
Chemical Engineering Division, UICT, Matunga, Mumbai 400 019, India.
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