Process for recovering resorcinol and hydroquinone in mixture
    4.
    发明授权
    Process for recovering resorcinol and hydroquinone in mixture 失效
    在混合物中回收间苯二酚和氢醌的方法

    公开(公告)号:US3969420A

    公开(公告)日:1976-07-13

    申请号:US375920

    申请日:1973-07-02

    摘要: Resorcinol and hydroquinone are recovered in mixture at a high purity from a solution containing resorcinol and hydroquinone, especially, a solution resulting from cleavage of oxidation products of isopropylbenzene and successive distillation of the cleavage product thereby to remove lower and higher boiling components therefrom, by adding 0.5 to 20 parts by weight of at least one solvent selected from aromatic hydrocarbons, aromatic hydrocarbons having lower alkyl substituent groups, and aliphatic hydrocarbons having 7 to 10 carbon atoms to one part by weight of said solution, if necessary, together with 1 to 30% by weight of at least one compound selected from ketones having 3 to 10 carbon atoms, alcohols having 1 to 5 carbon atoms and aliphatic esters having 3 to 5 carbon atoms, based on the weight of the organic solvent, dissolving the solution into the organic solvent by heating, separating a mixture of resorcinol and hydroquinone as a solid phase from the organic solvent layer after slow cooling, and recovering the solid phase as a product. The resorcinol and hydroquinone in the organic solvent layer are further recovered through extraction with water. When water is used together with the organic solvent from the beginning of extraction, the resorcinol and hydrocarbon are obtained in an aqueous layer.

    摘要翻译: 间苯二酚和氢醌以高纯度从含有间苯二酚和氢醌的溶液中回收,特别是从裂解异丙苯的氧化产物产生的溶液,并连续蒸馏裂解产物,从而通过加入从其中除去较低沸点和较高沸点的组分 0.5至20重量份的至少一种选自芳族烃,具有低级烷基取代基的芳族烃和具有7至10个碳原子的脂族烃的溶剂相对于所述溶液的1重量份,如果需要,连同1至30个 至少一种选自具有3至10个碳原子的化合物,具有1至5个碳原子的醇和3至5个碳原子的脂肪族酯的化合物,基于有机溶剂的重量,将该溶液溶解在有机溶剂中 溶剂,从有机溶剂层af分离作为固相的间苯二酚和氢醌的混合物 缓慢冷却,并回收作为产品的固相。 有机溶剂层中的间苯二酚和氢醌通过水提取进一步回收。 当水从开始开始与有机溶剂一起使用时,在水层中获得间苯二酚和烃。