| 摘要 |
<p>PCT No. PCT/AU88/00301 Sec. 371 Date Apr. 12, 1990 Sec. 102(e) Date Apr. 12, 1990 PCT Filed Aug. 12, 1988 PCT Pub. No. WO89/01468 PCT Pub. Date Feb. 23, 1989.A process for the production of urea comprising the steps of reacting carbon dioxide and ammonia to form ammonium carbamate and subsequent decomposition of ammonium carbamate to form a reaction mixture comprising urea and water, wherein the reaction mixture is contacted with one side of a semi-permeable membrane, and a drying fluid capable of removing water and possibly other reaction products(s) from the reaction mixture is contacted with the other side of the semi-permeable membrane.</p> |
