四氟乙烯生产用双戊烯的深度脱水技术研究
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摘要
以4A分子筛为干燥剂,对水的质量分数10~(-3)～1.5×10~(-3)的双戊烯采用静态浸泡法进行液相深度脱水,以满足四氟乙烯生产过程中对于阻聚剂含水量的使用要求。结果表明,分子筛的干燥效果要明显好于硅胶吸附与化学吸收;为保证脱水效果,活化后的分子筛只能使用1次,在优化干燥时间4 h并优选二级吸附工艺(二次干燥)的条件下,可以确保双戊烯的中水的质量分数在0.2×10~(-3)以下;且吸附过的分子筛可以通过简单的再生处理而被重复使用,具有很好的应用前景。
In order to satisfy the requirement of polymerization inhibitor in the tetrafluoroethylene production,a liquid phase deep dehydration technique was used for dipentene(mass fraction of water is about 1.0 × 10~(-3)～1.5 × 10~(-3)) with 4 A molecular sieve as desiccant by a static immersion method. The results showed that drying effect of 4 A molecular sieve was better than that of silica gel and chemisorption. In order to ensure drying effect, the activated molecular sieve was used only once. In the condition of optimal dehydrated time was 4 h and secondary dehydration technology was profitable,this could make sure that mass fraction of water of dipentene is about 0.2 × 10~(-3) or lower. what is more, the employed molecular sieve could be used repeatedly by simple recovery process, therefore it have good application prospects.
In order to satisfy the requirement of polymerization inhibitor in the tetrafluoroethylene production,a liquid phase deep dehydration technique was used for dipentene(mass fraction of water is about 1.0 × 10~(-3)～1.5 × 10~(-3)) with 4 A molecular sieve as desiccant by a static immersion method. The results showed that drying effect of 4 A molecular sieve was better than that of silica gel and chemisorption. In order to ensure drying effect, the activated molecular sieve was used only once. In the condition of optimal dehydrated time was 4 h and secondary dehydration technology was profitable,this could make sure that mass fraction of water of dipentene is about 0.2 × 10~(-3) or lower. what is more, the employed molecular sieve could be used repeatedly by simple recovery process, therefore it have good application prospects.
引文
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[4]庄礼信.氟致冷剂F12的深度干燥[J].广东化工,1985,(4):23-29.
[5]牟国培. JMT型天然沸石干燥剂在酸性气体深度脱水中的应用[J].化工设计,1992,(1):23-26,17.
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[7] BRECK D W. Zeolite molecular sieves:Structure,Chemistry and use[M]. New York:John Wiley&Sons Inc,1974:701-707.
[8]梁政,李双双,张力文,等. CNG脱水用4A分子筛再生性能实验研究[J].石油与天然气化工,2014,43(4):362-365.
[2]苗雨欣,蒋丽虹,王昊.工业双戊烯在精细化学品制备中的应用[J].日用化学工业,2011,41(1):55-59.
[3]朱霖章,姜羿,郑岗.天然沸石在氟制冷剂F12深度干燥上应用[J].浙江化工,1990,21(1):31-35.
[4]庄礼信.氟致冷剂F12的深度干燥[J].广东化工,1985,(4):23-29.
[5]牟国培. JMT型天然沸石干燥剂在酸性气体深度脱水中的应用[J].化工设计,1992,(1):23-26,17.
[6]许少白.分子筛及其在绝缘净化中的应用[J].缘材料通讯,1992,(5):38-42.
[7] BRECK D W. Zeolite molecular sieves:Structure,Chemistry and use[M]. New York:John Wiley&Sons Inc,1974:701-707.
[8]梁政,李双双,张力文,等. CNG脱水用4A分子筛再生性能实验研究[J].石油与天然气化工,2014,43(4):362-365.