| 摘要 |
Hazards are dealt with by appropriate placement of high heat capacity flame arrestor packings at suitable zones in the flow of the process streams comprising vapors of flammable mixture containing water and more than 10 mol % tertiary butyl hydroperoxide (conveniently designated as TBHP). Stainless steel mesh or other corrosion resistant high heat capacity packing is inserted in the lower portion of the first distillation zone, from which all components more volatile than dilute aqueous TBHP are removed. Suitable packing is also inserted into the upper portion of the second distillation zone, whereby a flammable mixture containing more than 10 mol % TBHP, is distilled without allowing a large plenum filled with flammable vapor. The vapor line between the top of such distillation zone and a condensation zone features a plurality of flame arrestors (e.g. a cylinder having a length and diameter of at least twice the effective diameter of the vapor line, and filled with corrosion resistant high heat capacity packing having a density greater than about 0.08 g/cc.) The spacing apart of such flame arrestors is from about 15 to 30 times the effective diameter of such vapor line. If any combustion starts in such vapor line, it is constrained between a pair of flame arrestors, thus protecting the purification system before extensive damage occurs. For a given size distillation zone, the aqueous TBHP can be distilled at a faster rate by such use of flame arrestors than by previous distillation arrangements.
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