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Cleaning production method for preparing bisphenol compound antioxidant product

A clean production and antioxidant technology, applied in the preparation of organic compounds, chemical instruments and methods, organic chemistry, etc., can solve environmental hazards and other problems, and achieve the effect of simplifying the production operation process

Active Publication Date: 2007-07-11
溧阳常大技术转移中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, a large amount of sewage is produced in the production, causing serious harm to the environment.

Method used

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  • Cleaning production method for preparing bisphenol compound antioxidant product
  • Cleaning production method for preparing bisphenol compound antioxidant product
  • Cleaning production method for preparing bisphenol compound antioxidant product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] In a 1000mL four-necked flask with a thermometer, a stirrer, a reflux condenser, and a dropping funnel, add 300 grams of 2,4-di-t-amylphenol, 380 grams of water, and the anionic surfactant dodecylbenzenesulfonic acid Sodium 2.5 grams, 98% sulfuric acid 18.5 grams. Paraldehyde 31.5 grams. Stir while heating. When the temperature of the reaction mixture rises to 92-93° C., the temperature is kept for 6 hours. After the reaction is finished, filter and collect the obtained filtrate as the reaction mother liquor for use. The filter cake was purified by recrystallization from absolute ethanol to obtain 276.2 g of white crystalline product of 2,2'-ethylene bis(4,6-ditentylphenol), with a melting point of 117.8-118.5°C.

Embodiment 2

[0041] Add the reaction mother liquor obtained in Example 1 into the four-necked flask in Example 1, add 300 grams of 2,4-di-t-amylphenol, and 31.5 grams of paraldehyde. Stir while heating. When the temperature of the reaction mixture rises to 92-93° C., the temperature is kept for 6 hours. After the reaction is finished, filter and collect the obtained filtrate as the reaction mother liquor for use. The filter cake was purified by recrystallization from absolute ethanol to obtain 282.6 g of white crystalline product of 2,2'-ethylene bis(4,6-ditentylphenol), with a melting point of 118.0-118.7°C.

Embodiment 3

[0043]The reaction mother liquor obtained by recycling the fifth time in Example 1 was added to the four-necked flask in Example 1, and 300 grams of 2,4-di-t-amylphenol and 31.5 grams of paraldehyde were added. Stir while heating. When the temperature of the reaction mixture rises to 92-93° C., the temperature is kept for 6 hours. After the reaction is finished, filter and collect the obtained filtrate as the reaction mother liquor for use. The filter cake was purified by recrystallization from absolute ethanol to obtain 279.6 g of white crystalline product of 2,2'-ethylene bis(4,6-di-t-amylphenol), with a melting point of 117.8-118.3°C.

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Abstract

The invention discloses a clean manufacturing method of bisphenol compound anti-oxidant, which comprises the following steps: adopting water with anion surface activator and acid catalyst as reacting solvent; making anhydrous fat aldehyde and phenol dialkyl as raw material; condensing; obtaining the product; separating reacting mother liquid after finishing reacting as reacting solvent to circulate.

Description

technical field [0001] The present invention relates to the clean production method of bisphenol compound antioxidant product, and bisphenol compound specifically refers to following formula (I) [0002] [0003] Where: R 1 =C 1 ~C 5 Straight chain alkanes or alkanes with branched chains; [0004] R 2 =C 1 ~C 5 Straight chain alkanes or alkanes with branched chains; [0005] R 3 = H; CH 3 . Background technique [0006] Bisphenol compound is a kind of antioxidant product in the above formula (I), is mainly used in the antioxidant of polymer materials such as synthetic rubber, polyolefin plastics, engineering plastics and oil products such as lubricating oil, fuel oil; The main raw material of acrylate antioxidant. [0007] Prior art, what this bisphenol compound adopts is water-containing fatty aldehyde, R 3 -CHO, the 30-40% aqueous solution of formula (II); and dialkylphenol, formula (III) is raw material, in containing [0008] [0009] Anionic surfactan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C39/16C07C37/20
Inventor 杜飞陈洪
Owner 溧阳常大技术转移中心有限公司
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