The present invention provides a process for producing bisphenol A which is capable of prolonging the life of an acid-type ion exchange resin partially modified with a sulfur-containing amine compound as catalyst, and increasing the yield of bisphenol A per unit quantity of the catalyst. There is disclosed a process for producing bisphenol A by reacting acetone with phenol in the presence of an acid-type ion exchange resin partially modified with a sulfur-containing amine compound as catalyst and alkylmercaptan as co-catalyst, said process comprising:
conducting said reaction using a multi-stage reaction apparatus comprising at least two individual reactors connected in series to each other, wherein the molar ratio of total alkylmercaptan to total acetone and the molar ratio of total acetone to phenol are increased as the conversion rate of the phenol is decreased.
本发明提供了一种生产双酚 A 的工艺,该工艺能够延长用含硫胺化合物部分改性的酸 型离子交换树脂作为催化剂的寿命,并提高单位数量催化剂的双酚 A 产量。本发明公开了一种生产双酚 A 的工艺,该工艺通过丙酮与苯酚在部分改性为含 硫胺化合物的酸性离子交换树脂作为催化剂和烷基硫醇作为助催化剂的存在下发 生反应来生产双酚 A,所述工艺包括: 1:
使用多级反应装置进行上述反应,该装置由至少两个相互串联的独立反应器组成,其中总烷基硫醇与总丙酮的摩尔比以及总丙酮与苯酚的摩尔比随着苯酚转化率的降低而增加。
CATALYST FOR PRODUCTION OF BISPHENOL COMPOUND AND METHOD FOR PRODUCING BISPHENOL COMPOUND
申请人:Mitsubishi Chemical Corporation
公开号:EP2497574A1
公开(公告)日:2012-09-12
A catalyst for producing a bisphenol compound, composed of gel catalyst beads formed by introducing strongly acidic group such as sulfonic acid group into gel beads obtained by the copolymerization of a styrene-based monomer and a crosslinking monomer, wherein 50% or more of the gel catalyst beads have particle diameters of 30 to 650 µm, and a method for producing a bisphenol compound by the reaction of a phenol compound and a carbonyl compound in the presence of the catalyst. The present invention provides a strongly acidic cation exchange resin catalyst for producing a bisphenol compound, exhibiting high raw-material conversion rate and high bisphenol-compound selectivity, having a long catalyst life span, and reducing pressure loss in a catalyst filled layer, and a method for producing a bisphenol compound at high conversion rate and high selectivity stably and efficiently for a long time by using the catalyst.
A series of novel 2-phenylthiazolidine-3-thiocarboxamides (II) was synthesized and tested for positive inotropic activity in the isolated guinea pig heart and in anesthetized dogs. Reaction of the benzaldehydes (VI, XI, XIV and XV) with cysteamine followed by treatment with isothiocyanates readily gave II. Structure-activity relationships were investigated by varying the structural parameters. N-Methyl-2 -phenylthiazolidine-3-thiocarboxamides having an ortho substituent such as a Me or OMe group exhibited significant positive inotropic action, which was not blocked by propranolol. Among the various ortho-alkoxyphenyl derivatives synthesized, the 2- (2- (3- (4-phenylpiperazino) propoxy) phenyl) derivative (I67) was found to exhibit more potent and longerlasting activity than amrinone without any significant effect on heart rate or blood pressure