| 用半量溴素合成溴硝醇新工艺 |
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| 引用本文： | 李建生,魏青. 用半量溴素合成溴硝醇新工艺[J]. 精细石油化工, 2006, 23(1): 46-48 |
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| 作者姓名： | 李建生 魏青 |
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| 作者单位： | 天津职业大学生物与环境工程学院,天津,300402;天津化工研究设计院,天津,300131 |
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| 摘 要： | 为了降低溴硝醇生产的溴素消耗,采用甲醛和硝基甲烷经过缩合、中和、溴化和氯化过程合成了溴硝醇。优化反应条件为缩合反应温度0~4℃,反应时间60 min;中和反应温度0~4℃,反应时间67 min;溴化反应温度-4℃以下,反应时间90 min,溴素过量5%。新工艺溴硝醇收率79.1%,含量99.7%,最大杂质含量0.09%。与传统工艺相比溴素平均消耗降低48%,原料成本降低约27.2%。
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| 关 键 词： | 溴硝醇 溴素 甲醛 硝基甲烷 |
| 收稿时间： | 2005-06-27 |
| 修稿时间： | 2005-10-31 |
NEW PROCESS FOR THE SYNTHESIS OF BRONOPOL WITH HALF QUANTITY OF BROMINE |
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| Li Jiansheng,Wei Qing. NEW PROCESS FOR THE SYNTHESIS OF BRONOPOL WITH HALF QUANTITY OF BROMINE[J]. Speciality Petrochemicals, 2006, 23(1): 46-48 |
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| Authors: | Li Jiansheng Wei Qing |
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| Affiliation: | 1. Tianjin Professional College, Tianjin 300402, China;2. Tianjin Research and Design Institute of Chemical Industry, Tianjin 300131, China |
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| Abstract: | Bronopol was synthesized from formaldehyde and nitromethane by condensation,neutralization,bromination and chlorination for decreasing the consumption of bromine.The optimal conditions of the reaction were: temperature of condensation 04 ℃ and reaction time 60 min,temperature of neutralization 04 ℃ and reaction time 67 min,and temperature of halogenation-4 ℃ and reaction time 90 min with 5% over dosage of bromine.The yield of bronopol was 79.1% with 99.7% purity and 0.09% impurity.The average consumption of bromine and material cost of the new process decreased by 48% and 27.2%,resepectively,compared with the old process. |
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| Keywords: | bronopol bromine chlorine formaldehyde nitromethane |
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