The Separation of Catechol from Carbofuran Phenol by Extractive Distillation

›› 2009, Vol. 17 ›› Issue (1): 42-46.

• SEPARATION SCIENCE AND ENGINEERING • Previous Articles Next Articles

The Separation of Catechol from Carbofuran Phenol by Extractive Distillation

ZHANG Jianyu^1,2, HU Aixi¹, WANG Yu^1,2, XIAO Xuhui², GUO Jiabin¹, LUO Xianfu¹

1. College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China;
2. Hunan Haili Chemical Industry Co., Ltd, Changsha 410007, China

Received:2008-06-05 Revised:2008-08-26 Online:2009-01-28 Published:2009-01-28
Supported by:
Supported by the National High Technology Research and Development Program of China(2006AA03Z460)

The Separation of Catechol from Carbofuran Phenol by Extractive Distillation

张建宇^1,2, 胡艾希¹, 王宇^1,2, 肖旭辉², 郭家斌¹, 罗先福¹

1. College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China;
2. Hunan Haili Chemical Industry Co., Ltd, Changsha 410007, China

通讯作者: HU Aixi, E-mail: axhu0731@yahoo.com.cn
基金资助:
Supported by the National High Technology Research and Development Program of China(2006AA03Z460)

Abstract

Abstract: In this study, extractive distillation has been applied to separate catechol(CAT) from carbofuran phenol(CFP) with high purity and yield.The relative volatility of CFP to CAT was measured, and the choice of separating agents was investigated.The experimental results indicated that CFP/CAT is an azeotropic system with an azeotropic point at 93.40℃/0.400 kPa and an azeotropic mixture containing 49.96% of CFP and 50.04% of CAT.Data from the determination of the relative volatility have shown that separating agents such as diglycol and 4-butylcatechol(4-TBC) are able to increase the relative volatility up to 1.90.In one shot process batch extractive distillation of CFP mixture with 3%(by mass) diglycol as separating agent, the purity and yield of the obtained CFP was 99.0% and 95.0%, respectively, while the distillation without separating agent provided a purity and yield of only 98.0% and 90.0%, respectively.There was no residual separating agent found in the product.

Key words: carbofuran phenol, catechol, azeotrope, extractive distillation

摘要： In this study,extractive distillation has been applied to separate catechol(CAT) from carbofuran phenol(CFP) with high purity and yield.The relative volatility of CFP to CAT was measured,and the choice of separating agents was investigated.The experimental results indicated that CFP/CAT is an azeotropic system with an azeotropic point at 93.40℃/0.400 kPa and an azeotropic mixture containing 49.96% of CFP and 50.04% of CAT.Data from the determination of the relative volatility have shown that separating agents such as diglycol and 4-butylcatechol(4-TBC) are able to increase the relative volatility up to 1.90.In one shot process batch extractive distillation of CFP mixture with 3%(by mass) diglycol as separating agent,the purity and yield of the obtained CFP was 99.0% and 95.0%,respectively,while the distillation without separating agent provided a purity and yield of only 98.0% and 90.0%,respectively.There was no residual separating agent found in the product.

关键词: carbofuran phenol, catechol, azeotrope, extractive distillation

ZHANG Jianyu, HU Aixi, WANG Yu, XIAO Xuhui, GUO Jiabin, LUO Xianfu. The Separation of Catechol from Carbofuran Phenol by Extractive Distillation[J]. , 2009, 17(1): 42-46.

张建宇, 胡艾希, 王宇, 肖旭辉, 郭家斌, 罗先福. The Separation of Catechol from Carbofuran Phenol by Extractive Distillation[J]. , 2009, 17(1): 42-46.

References

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The Separation of Catechol from Carbofuran Phenol by Extractive Distillation

The Separation of Catechol from Carbofuran Phenol by Extractive Distillation

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