申请人:MITSUI PETROCHEMICAL INDUSTRIES, LTD.
公开号:EP0112615A2
公开(公告)日:1984-07-04
A process for continuously producing 2,2-bis(4-hydroxyphenyl) propane having a high quality from a reaction of phenol and acetone in the presence of a hydrochloric acid containing catalyst comprising the steps of:
(A) carrying out the reaction by continuously charging additional phenol, the below-mentioned circulating phenol, additional acetone, additional hydrogen chloride or hydrochloric acid, the below-mentioned circulating oily mother liquor, and the below-mentioned aqueous mother liquid into a reactor to form a reaction mixture slurry comprising the crude phenol adduct of 2,2-bis(4-hydroxyphenyl) propane in the form of crystal and two liquid phase reaction mother liquors of an oily mother liquor and an aqueous mother liquor;
(B) separating the reaction mixture slurry into the crude phenol adduct of 2,2-bis(4-hydroxyphenyl) propane and the two liquid phase mother liquors after discharging the reaction mixture slurry from the reactor;
(C) separating the two liquid phase mother liquors obtained in the above-mentioned step (B) into the oily mother liquor and the aqueous mother liquor, whereby the oily mother liquor is circulated as a circulating oily mother liquor to the reactor and the remaining portion of the aqueous mother liquor, after discharging a portion thereof, is circulated as a circulating aqueous mother liquor to the reactor;
(D) dissolving the crude phenol adduct of 2,2-bis(4-hydroxyphenyl) propane obtained in the above-mentioned step (B) in a phenol solvent and, after neutralizing the hydrogen chloride or hydrochloric acid contained in the crude phenol adduct with a base, crystallizing and separating the phenol adduct of 2,2-bis(4-hydroxyphenyl) propane from the solution to obtain the purified phenol adduct of 2,2-bis(4-hydroxyphenyl) propane;
(E) decomposing the purified phenol adduct of 2,2-bis (4-hydroxyphenyl) propane obtained in the above-mentioned step (D), on heating, to form a thermally decomposed product containing phenol and 2,2-bis(4-hydroxyphenyl) propane;
(F) recoverying the phenol and 2,2-bis(4-hydroxyphenyl) propane from the thermally decomposed product obtained in the above-mentioned step (E); and
(G) circulating the phenol recovered in the above-mentioned step (F) to the reactor in the above-mentioned step (A) as a circulating phenol or to the above-mentioned step (D) as a phenol solvent.
一种在含盐酸催化剂存在下通过苯酚和丙酮反应连续生产高质量 2,2-双(4-羟基苯基)丙烷的工艺,包括以下步骤: 1:
(A) 通过将额外的苯酚、下述循环苯酚、额外的丙酮、额外的氯化氢或盐酸、下述循环油性母液和下述水性母液连续加入反应器来进行反应,以形成反应混合物浆液,该浆液包括晶体形式的 2,2-双(4-羟基苯基)丙烷的粗苯酚加成物以及油性母液和水性母液两种液相反应母液;
(B) 将反应混合物浆液从反应器中排出后,将反应混合物浆液分离成 2,2-双(4-羟基苯基)丙烷的粗酚加合物和两种液相母液;
(C) 将上述步骤(B)中得到的两种液相母液分离成油性母液和水性母液,其中油性母液作为循环油性母液循环到反应器中,剩余部分水性母液在排出一部分后作为循环水性母液循环到反应器中;
(D) 将上述步骤(B)中得到的 2,2-双(4-羟基苯基)丙烷的粗酚加合物溶解在苯酚溶剂中,用碱中和粗酚加合物中含有的氯化氢或盐酸后,从溶液中结晶分离出 2,2-双(4-羟基苯基)丙烷的酚加合物,得到纯化的 2,2-双(4-羟基苯基)丙烷的酚加合物;
(E) 将上述步骤(D)中得到的 2,2-双(4-羟基苯基)丙烷的纯化苯酚加合物加热分解,形成含有苯酚和 2,2-双(4-羟基苯基)丙烷的热分解产物;
(F) 从上述步骤(E)得到的热分解产物中回收苯酚和 2,2-双(4-羟基苯基)丙烷;以及
(G) 将上述步骤(F)中回收的苯酚作为循环苯酚循环到上述步骤(A)中的反应器中,或作为苯酚溶剂循环到上述步骤(D)中。