Modified acidic ion-exchange resin and method for preparing bisphenol

a technology of acidic ion exchange resin and bisphenol, which is applied in the direction of organic compound/hydride/coordination complex catalyst, physical/chemical process catalyst, bulk chemical production, etc., can solve the problems of insufficient conversion of acetone, complex process, corrosion of apparatus used in reaction, etc., and achieve the effect of increasing the selective effect of bisphenol

Inactive Publication Date: 2005-03-31
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0012] The present inventors have conducted extensive studies to solve the problems, and as a result, they have found that by using, as a catalyst, an acidic ion-exchange resin in which at least one kind of cationic compound selected from compounds represented by the formulae (1), (2) and (3), and an N-substituted nitrogen-containing aromatic compound, ionically binds to an acidic functional group of the acidic ion-exchange resin, the selectivity to bisphenol can be increased and the activity or the selectivity of a catalyst can also be maintained for a longer period of time, and accordingly bisphenol can be obtained with a high yield. Thus, they have completed the present invention.

Problems solved by technology

However, the homogeneous acid such as hydrochloric acid requires removal of the catalyst from a reaction mixture or neutralization of the reaction mixture, and thus the process becomes complicated.
Homogeneous dissolution of the acid in the reaction solution further causes corrosion of apparatus used in the reaction.
Therefore, the reaction apparatus vessels should be made of expensive, anti-corrosive materials, thus being uneconomical.
First, in the case where a particle diameter of a sulfonic acid-type cation-exchange resin to be used is large, since the reaction raw materials do not sufficiently diffuse within the particles, a sufficient conversion of acetone is not obtained.
In other words, a sulfonic acid-type cation-exchange resin with a low content of divinylbenzene has a high catalytic activity due to a large gel micropore, but the mechanical strength is low.
In addition, in the case where the content thereof is high, the mechanical strength increases, but the gel micropore size decreases, which causes decreased activity.
However, in the case where an ion-exchange resin having macropores adsorbs molecules having high polarity, such as water, a crosslinked structure tends to inhibit the bulge of particles caused by the swelling, which eventually collapses when it can no longer endure the pressure from the swelling.
As such, various technologies have been examined for the catalyst, but none has been satisfactory with respect to the selectivity.
Therefore, the development of a catalyst having a high selectivity and a long life time is demanded.

Method used

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  • Modified acidic ion-exchange resin and method for preparing bisphenol
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  • Modified acidic ion-exchange resin and method for preparing bisphenol

Examples

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example 1

[0045] (1) Preparation of a Modified Ion-Exchange Resin Catalyst

[0046] While vigorously stirring the water-swollen Amberlyst 31 (dry weight 4 g) with 80 ml of ion-exchange water, thereto was slowly added dropwise 40 ml of an aqueous n-tetrabutylammonium chloride solution having a concentration of 0.153 mole / L. After completing the dropwise addition, the mixture was further stirred for 5 hours, and was then repeatedly filtered and washed with ion-exchange water. Thereafter, it was dried under vacuum at 80° C. for 10 hours or longer to obtain Catalyst 1. The results of the measurement of an acid amount and of the elemental analysis in the Catalyst are shown in Table 1.

[0047] (2) Synthesis Reaction of Bisphenol A

[0048] 6.63 g of phenol, 0.37 g of acetone and 0.35 g of Catalyst 1 prepared in (1), were put into a 70 ml pressure-resistant reactor, and 3-mercaptopropionic acid was put thereto such that the concentration is 3000 ppm. Then, the pressure-resistant reactor was pressurized w...

example 2

[0049] In the same manner as in (1) of Example 1, except that an aqueous tetramethylammonium chloride solution having a concentration of 0.153 mole / L was used instead of an aqueous tetrabutylammonium chloride solution, the operation was performed to obtain Catalyst 2. The results of the measurement of an acid amount and of the elemental analysis in the Catalyst are shown in Table 1. In addition, under the same conditions as in (2) of Example 1, except that Catalyst 2 was used instead of Catalyst 1, the synthesis reaction of bisphenol A was performed. The results were shown in Table 2.

example 3

[0050] In the same manner as in (1) of Example 1, except that an aqueous n-dodecyltrimethylammonium chloride solution having a concentration of 0.153 mole / L was used instead of an aqueous tetrabutylammonium chloride solution, the operation was performed to obtain Catalyst 3. The results of the measurement of an acid amount and of the elemental analysis in the Catalyst are shown in Table 1. In addition, under the same conditions as in (2) of Example 1, except that Catalyst 3 was used instead of Catalyst 1, the synthesis reaction of bisphenol A was performed. The results were shown in Table 2.

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Abstract

The present invention provides an ion-exchange resin catalyst, as a catalyst for preparing bisphenol from phenol compounds and ketone, which has a higher selectivity to bisphenol and a longer life time, as compared to a conventional ion-exchange resin, and a method for preparing the same. The present invention also provides a method for preparing bisphenol comprising reacting phenol compounds with ketone, wherein the modified acidic ion-exchange resin in which at least one kind of cationic compound selected from the following (a), (b), (c) and (d) ionically binds to an acidic functional group, is used as a catalyst: (a) a quaternary phosphonium ion, (b) a quaternary ammonium ion, (c) a bis(phosphoranylidene) ammonium ion, and (d) an N-substituted nitrogen-containing aromatic cation.

Description

TECHNICAL FIELD [0001] The present invention relates to a modified acidic ion-exchange resin catalyst and a method for preparing bisphenol using the same. In particular, the present invention relates to a modified ion-exchange resin catalyst having a high reactive selectivity and a method for preparing bisphenol which comprises reacting phenol compounds with ketone and / or aldehyde in the presence of the catalyst. BACKGROUND ART [0002] Bisphenol A [2,2-bis(4-hydroxyphenyl)propane] is usually prepared by reacting phenol with acetone in the presence of a homogeneous acid or a solid acid catalyst. The reaction mixture includes unreacted acetone, unreacted phenol, water and other by-products formed by the reaction, in addition to bisphenol A. The main component of the by-products is 2-(2-hydroxyphenyl)-2-(4-hydroxyphenyl)propane (hereinafter, referred to as o,p′-BPA), and in addition, it includes trisphenol, a polyphenol compound, a chroman compound and colored impurities. [0003] Example...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B01J31/08B01J39/12B01J39/08B01J39/16B01J39/20C07B61/00C07C37/20C07C39/16
CPCB01J31/0239B01J31/0268B01J31/08B01J31/10C07C37/20B01J2231/342C07C39/16Y02P20/52B01J39/08B01J39/16B01J39/12
Inventor TERAJIMA, TAKASHITAKAI, TOSHIHIROFUJIWARA, KENJI
Owner MITSUI CHEM INC
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