| 刘 群,丁 斌,郝凤岭,等.强酸性阳离子交换树脂催化玉米原油[J].中国油脂,2014,39(9):.[LIU Qun,DING Bin,HAO Fengling.Epoxidization of crude corn oil catalyzed by strong-acid cation exchange resin[J].China Oils and Fats,2014,39(9):.] |
| 强酸性阳离子交换树脂催化玉米原油 |
| Epoxidization of crude corn oil catalyzed by strong-acid cation exchange resin |
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| DOI： |
| 中文关键词: 玉米原油 强酸性阳离子交换树脂 环氧玉米油 环氧值 |
| 英文关键词:crude corn oil strong-acid cation exchange resin epoxidized corn oil epoxy value |
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| 中文摘要: |
| 以强酸性阳离子交换树脂NKC-9为催化剂、乙二胺四乙酸二钠（EDTA-Na2）为助催化剂，使用低浓度双氧水与甲酸原位反应生成过氧甲酸（PA）；以PA为氧化剂、玉米原油为原料合成环氧玉米油。考察了EDTA-Na2、NKC-9、双氧水、甲酸溶液的用量,反应温度,反应时间对环氧化反应的影响，确定了最佳反应工艺条件为：EDTA-Na2、NKC-9、双氧水、甲酸溶液的用量分别为玉米原油质量的0.01%、13%、110%、17%，反应温度55℃，反应时间6 h。在最佳反应条件下，环氧玉米油的环氧值达到6.49%，环氧率为85.85%，未反应率为2.83%，开环率为11.32%；与传统硫酸催化工艺相比，使用NKC-9催化产品的环氧率比硫酸催化高，并且开环率低约0.7个百分点。 |
| 英文摘要: |
| Crude corn oil was epoxidized with peroxyformic acid prepared by in-situ reaction of formic acid and low concentration of hydrogen peroxide as oxidant, strong-acid cation exchange resin NKC-9 as catalyst and ethylene -diamine tetraacetic acid disodium salt (EDTA-Na2) as promoter. The effects of dosages of EDTA-Na2, hydrogen peroxide, NKC-9 and formic acid, reaction temperature and reaction time on the epoxidization were studied, and the optimal process parameters were determined as follows: the respective dosage of EDTA-Na2, NKC-9, hydrogen peroxide and formic acid 0.01%, 13%, 110% and 17%(based on the mass of crude corn oil), reaction time 6 h, reaction temperature 55℃. Under these conditions, the epoxy value, epoxy rate, unreaction rate and ring opening rate of epoxidized corn oil were 6.49%, 85.85%, 2.83% and 11.32%respectively; comparing with the traditional sulfuric acid catalytic process, the epoxy rate of epoxidized corn oil with NKC-9 as catalyst was higher and the ring opening rate lowered by 0.7 percentage points. |
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