公开(公告)号：US4628041A

公开(公告)日：1986-12-09

申请号：US827699

申请日：1986-02-10

申请人： Brad L. Smith ,  George P. Torrence ,  Adolfo Aguilo

发明人： Brad L. Smith ,  George P. Torrence ,  Adolfo Aguilo

IPC分类号： B01J27/32 ,  C07C51/12 ,  B01J38/68 ,  B01J27/08 ,  C07C53/08

CPC分类号： B01J27/32 ,  C07C51/12 ,  Y02P20/584

摘要： A process for the recovery of rhodium and iodine values and the separation of rhodium from corrosion metal salts in the manufacture of acetic acid by the carbonylation of methanol wherein the reaction mixture contains from about none to about 20 wt % of water, from about 2 to about 20 wt % of alkali metal or alkaline earth metal iodide, methanol, acetic acid, methyl iodide, and carbon monoxide which comprises: (1) removing at least a portion of the reaction solution from the reactor, (2) removing at least a portion of the product acetic acid from the portion in (1) by distillation, (3) adding an excess of methyl acetate to the product depleted material in (2) and heating the resultant mixture to a sufficiently high temperature to convert the methyl acetate to methyl iodide (4) removing the resulting methyl iodide by distillation, (5) continuing to heat the resulting mixture at a temperature and time sufficient to precipitate the rhodium as rhodium iodide, and (6) separating the rhodium iodide and returning it to the reaction mixture.

摘要翻译： 回收铑和碘值的方法以及通过羰基化甲醇在乙酸制造中从腐蚀金属盐中分离铑的方法，其中反应混合物含有约不超过约20重量％的水，约2至 约20重量％的碱金属或碱土金属碘化物，甲醇，乙酸，甲基碘和一氧化碳，其包括：（1）从反应器中除去至少一部分反应溶液，（2）除去至少一种 通过蒸馏从（1）中的部分产物乙酸的部分，（3）向（2）中的产物贫化物质中加入过量的乙酸甲酯，并将所得混合物加热至足够高的温度以将乙酸甲酯转化为 甲基碘（4）通过蒸馏除去得到的甲基碘，（5）在足以使铑作为碘化铑沉淀的温度和时间继续加热所得混合物，和（6）分离铑 碘化物并将其返回到反应混合物中。