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Process for producing bisphenol A with satisfactory hue

A manufacturing method and technology of bisphenol, which is applied in the field of manufacturing bisphenol A with good hue, can solve the problems of unclear distinction, complicated operation, impracticality, etc., and achieve the effect of avoiding deterioration of hue and reducing device cost

Inactive Publication Date: 2008-10-29
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to produce high-quality bisphenol A, there is no clear distinction as to which material should be used for each device in the above process. In addition, it has not been found that there should be no clear description of the operating temperature or the temperature of the heating medium among the materials of the device used. Documentation set
[0008] In the embodiment of Patent Document 3, SUS304 is used as the metal material of the melting device and the evaporating device, but in order to remove oxygen from the inner wall surfaces of the melting device and the evaporating device, it is necessary to spray high-temperature phenol into the device for cleaning, and the operation is extremely complicated and not necessary. practical

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] (condensation reaction process)

[0063] 20 mol% of the sulfonic acid groups of the cation exchange resin (Mitsubishi Chemical Co., Ltd., "Diayion S K 104H") was partially neutralized with 2-mercaptoethylamine, and the fixed-bed reaction tower filled with the partially neutralized product (Material: SUS304), LHSV 3hr -1 The reaction was carried out at 75°C by continuously passing liquid phenol and acetone at a molar ratio of 10:1.

[0064] (concentration process)

[0065] The resulting reaction mixture was distilled off acetone, water, and phenol in the original distillation tower (material: SUS304, heat carrier temperature 190°C, liquid temperature 170°C) under reduced pressure, and concentrated until the concentration of bisphenol A was 40 mass %, to obtain phenol-bisphenol A solution.

[0066] (Crystalization, solid-liquid separation process)

[0067] Then, add water to the phenol-bisphenol A solution with a bisphenol A concentration of 40% by mass, and in a crys...

Embodiment 2

[0075] Except that in the distillation operation of the reaction mixture and the dissolution operation after crystallization, the heating medium temperature was set at 210° C. and the liquid temperature was set at 190° C., other operations were performed in the same manner as in Example 1 to obtain granular bisphenol A. The APHA of the obtained bisphenol A was 15.

Embodiment 3

[0077] Except having changed the material of the equipment after the adduct decomposition process into SUS316, it operated similarly to Example 1, and obtained the bisphenol A of granular form. The APHA of the obtained bisphenol A was 10.

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PUM

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Abstract

An apparatus for producing bisphenol which has (1) a condensation step in which excess phenol is condensed with acetone, (2) a concentration step, (3) a crystallization / solid-liquid separation step, (4) an adduct decomposition step, and (5) a granulation step, wherein those metallic parts of the apparatus which come into contact with the reaction mixture in and after the adduct decomposition step (4) are made of a stainless steel containing molybdenum, the temperatures of the raw-material system and the liquid-phase part of the reaction product are regulated to 180 DEG C or lower, and the temperature of a heat carrier for heating these is regulated to 200 DEG C or lower. Due to this, bisphenol A having a satisfactory hue can be economically and advantageously produced with this apparatus for producing bisphenol A from phenol and acetone.

Description

technical field [0001] The present invention relates to a method for selecting a material in a bisphenol A manufacturing device and a method for manufacturing bisphenol A. Specifically, it relates to the production of high-quality bisphenol A from phenol and acetone, especially the production of bisphenol A with good hue Selection of the material of the metal material in the equipment used, and the method of producing bisphenol A with good hue using the production equipment. Background technique [0002] Bisphenol A is an important compound as a raw material of epoxy resin or polycarbonate resin, and its use and demand have been increasing in recent years. In order to obtain high-quality resin, colorless and high-purity bisphenol A is required. [0003] Bisphenol A is usually produced by reacting phenol and acetone in the presence of an acidic catalyst. As an acidic catalyst, a strongly acidic cation exchange resin is typified. The reaction product contains reaction by-pr...

Claims

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Application Information

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IPC IPC(8): C07C37/20C07C39/16C07B61/00
CPCC07C37/86C07C37/84C07C37/20C07C39/16C07B61/00
Inventor 吉富一之儿玉正宏增田修一小比类卷润山崎北斗
Owner IDEMITSU KOSAN CO LTD
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