| 摘要 |
<p>PCT No. PCT/EP94/02084 Sec. 371 Date Dec. 4, 1995 Sec. 102(e) Date Dec. 4, 1995 PCT Filed Jun. 27, 1994 PCT Pub. No. WO95/01213 PCT Pub. Date Jan. 12, 1995A method for the recovery of glycols from used antifreeze compositions by distillation entails the used antifreeze composition being treated before and/or during its distillation with an effective amount of sulfamic acid.</p> |
