| 摘要 |
1467936 Treating waste water RUHRCHEMIE AG 22 May 1975 [31 May 1974] 22304/75 Heading C1C Effluent water, from the production of plasticizer esters by the esterification of an aliphatic of aromatic polycarboxylic acid with an alkanol in the presence of H 2 SO 4 as catalyst, is treated to remove and recover organic matter by heating in the liquid phase at above 200‹ C., cooling optionally acidifying and separating the organic and aqueous phases. The aqueous phase may be further treated with acid to precipitate dissolved carboxylic acids. |
