发明名称 |
Premixture for explosive mfr. - is prepd. from ammonium nitrate and formaldehyde and contains ammonium nitrate, methyl nitrate and alkali metal formate |
摘要 |
<p>Pre-mixt. for the mfr. of explosives is prepd. in liq. phase by (a) mixing NH4NO3 and HCHO; (b) heating gradually to set up an exothermic reaction and keeping 1-2 hrs. at =95 degrees C; (c) vacuum distn. to reduce water content to 8-10 wt.% and (d) removing the HCOOH formed, to leave 1.wt.% HCOOH, by adding sufficient MeOH or EtOH to form Me-. or Et formate and vacuum distn. The residual HCOOH is then neutralised with alkali to pH 6.5, to form a liq. mixt. consisting of NH4NO3, mono- or dimethyl nitrate and a small quantity of alkali formate. The pre-mixt. can be worked to (1) rock-blasting explosives for underground or tunnel construction, and (2) safety mining explosives for coal mines subject to fire-damp. The explosives are water-proof and can be ignited in water-contg. drilling holes up to 24 hrs. after charging.</p> |
申请公布号 |
DE2756261(A1) |
申请公布日期 |
1979.06.21 |
申请号 |
DE19772756261 |
申请日期 |
1977.12.16 |
申请人 |
IDL CHEMICALS LTD. |
发明人 |
IYENGAR VARADACHAR,KUPPAM SRINIVASA;GANAPATHI,DR. SUNDARAM,BALAKRISHNAN |
分类号 |
C06B31/30;C06B47/00;(IPC1-7):C06B31/30 |
主分类号 |
C06B31/30 |
代理机构 |
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代理人 |
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