共查询到17条相似文献,搜索用时 156 毫秒
1.
2.
3.
《精细化工原料及中间体》2014,(6)
正山东易达利化工有限公司自主开发了碳四氧化和加氢生产甲基烯丙醇环境友好新工艺。该工艺以叔丁醇(或异丁烯)为原料经过氧化和加氢生产甲基烯丙醇,工艺路线主要有两个步骤,第一步是叔丁醇氧化合成甲基丙烯醛;第二步是甲基丙烯醛加氢合成甲基烯丙醇,原子利用率为80%。在开发过程中,先后解决了加氢选择性差、甲基丙烯醛防聚合 相似文献
4.
5.
镁蒸气(原子)和3种溶剂(THF,n-Bu_2O,PhMe)在77K 下共凝聚,凝聚物升温至室温得溶剂化金属镁原子。此时很易发生格氏反应。不活泼的卤代物也能与其在室温、无任何引发剂的条件下进行反应,产率很高。还研究了溶剂对活性的影响。 相似文献
6.
7.
本文围绕“原子经济”反应,原料,催化剂,溶剂和开发新型合成方法等几个方面着重评述了有机合成反应绿色化近几年来的进展。 相似文献
8.
9.
根据原子经济观点提出以碳当量计入化学加工能耗后的有效原子利用率,能够更完整地描述过程的原子经济性。基于此提出从天然气脱硫再生酸气出发的气-肥-氯-碱多联产循环工艺,其有效原子利用率接近1,产品附加值增长超过156%。 相似文献
10.
从原子经济性出发,对以碳酸铈为原料合成硝酸铈铵的绿色化学工艺与传统工艺进行了对比.与传统工艺相比,绿色化学工艺的原子利用率提高30.01个百分点,原子效率因子提高24.44个百分点. 相似文献
11.
In the preliminary stage of chemical process design, the choice of chemical reaction route is the key design decision, and the concepts of atom utilization and environmental quotient have become extremely useful tools. However, the waste quality such as chemical toxicity and other engineering factors have not been taken into account. Therefore, a synthetic route selection index, IRoute is proposed to determine the suitability of a chemical route in this paper. IRoute considers the effects of "extended atom economy", material renewability, chemical characteristics and some engineering factors. The extended atom economy concept regards not only the value of the desired product but also the value of byproducts. The methodology by using IRoute to compare different routes is illustrated in case study of cyclohexanone oxime and acrylonitrile manufacture. 相似文献
12.
In the preliminary stage of chemical process design, the choice of chemical reaction route is the key design decision, and the concepts of atom utilization and environmental quotient have become extremely useful tools. However, the waste quality such as chemical toxicity and other engineering factors have not been taken into account. Therefore, a synthetic route selection index, /Route, is proposed to determine the suitability of a chemical route in this paper. /Route considers the effects of “extended atom economy”, material renewability, chemical characteristics and some engineering factors. The extended atom economy concept regards not only the value of the desired product but also the value of byproducts. The methodology by using IRoute to compare different routes is illustrated in case study of cyclohexanone oxime and acrylonitrile manufacture. 相似文献
13.
14.
Weihan WANG Jing Lü Li ZHANG Zhenhua LI 《Frontiers of Chemical Science and Engineering》2011,5(3):349-354
Green chemistry has attracted more attention in the past century. Among the 12 principles of green chemistry, only atom economy and E factor can be expressed quantitatively to depict the impact of a chemical process to environment. Atom economy was thought better than the traditional yield for evaluating the atom efficiency of raw materials. But it is not enough to reflect the conversion degree of raw material. In this paper, we proposed the concept of real atom economy (RAE) as a metric. RAE could combine the above two factors together to better express the green degree of a process. We further suggested an equation to correlate E factor with RAE. The concept of RAE is proved to be helpful for estimating an environmentally benign process. 相似文献
15.
绿色可持续发展石油化工生产技术的新进展 总被引:9,自引:0,他引:9
围绕过氧化氢作氧化剂的烃类“原子经济”氧化反应、取代有毒有害原料的绿色化工技术、使用环境友好催化剂的化学反应、在新兴绿色溶剂中进行的化学反应、废弃聚合物的回收利用及由生物质资源生产石油化工产品和生物柴油等内容,评述了绿色可持续发展石油化工生产技术的一些新进展。 相似文献
16.
关于有机化学反应中的原子经济性探讨 总被引:1,自引:0,他引:1
探索具有原子经济性的反应是绿色化学的重要研究内容,是当今合成策略的一个重要组成部分。通过有机化学反应中重排反应、加成反应和异构化反应等对原子经济性进行了探讨 相似文献
17.
采用原子利用率、环境因子和环境商以及GREENSCOPE法对4-氨基吡啶的不同合成工艺过程进行了绿色评价. 与传统的铁粉还原和催化氢化过程相比,电化学还原方法具有明显的优势:工艺操作简单,反应收率高,生产成本低,具有环境友好和可持续性. 采用电化学方法还原硝基化合物制备氨基化合物符合绿色化学发展的趋势,满足可持续发展要求,在精细化工领域具有良好的应用前景. 相似文献