| 摘要 |
<p>A process for the preparation of chloromethyl chloroformate comprises introducing dry gaseous monomeric formaldehyde into a reactor containing phosgene and a catalyst which is a substituted amide, tetrasubstituted urea or thiourea, a phosphoramide in which the nitrogen is completely substituted, a quaternary ammonium halide in which the substituents include a total of at least 16 carbon atoms, or an alkali metal or alkaline earth metal halide associated with a sequestering agent for its cation, or the reaction product of any of these catalysts with phosgene, in the absence of water and hydrochloric acid and at a temperature of from -10 DEG C to +60 DEG C.</p> |
