| Method for preparing isocyanates by liquid-phase thermal cracking | |
Deng YQ(邓友全) ; Guo XG(郭晓光); Shi F(石峰); Zhang QH(张庆华); Ma XY(马祥元); Lu LJ(卢六斤); Li J(李健); Tian X(田雄); Ma YB(马昱博); Shang JP(尚建鹏); Cui XJ(崔新江); Wang LG(王利国); Zhang HZ(张宏哲)
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| 2014-08-19 | |
| Rights Holder | 中国科学院兰州化学物理研究所 |
| Date Available | 2011-06-27 |
| Country | 美国 |
| Abstract | ; The present invention discloses a method for preparing isocyanates by liquid-phase catalytic thermal cracking. In this method, in a reaction-rectification thermal cracking reactor, using a catalyst composition comprising a superfine powder metal oxide catalyst and an ionic liquid, an alkyl or aryl dialkylurethane, or multialkylurethane being a reactant is liquid-phase thermal cracked for a reaction time of 0.5-3 h under a reaction temperature of 160-220 ℃ and an absolute pressure of 1000-8000 Pa so as to prepare the corresponding isocyanate. The invention has the characteristics of low thermal cracking temperature, high yield of target products, relatively simple reaction apparatus and good universality for substrates (the yields of HDI, MDI, TDI, HMDI, NDI and IPDI or the like are all>85%) and the like. |
| Subject Area | 物理化学与绿色催化 |
| Department | 绿色化学研究发展中心 |
| Application Date | 2009-12-14 |
| Patent Number | US 8,809,574 B2 |
| Language | 英语 |
| Status | 授权 |
| Document Type | 专利 |
| Identifier | http://ir.licp.cn/handle/362003/7119 |
| Collection | 绿色化学研究发展中心 |
| Affiliation | 中国科学院兰州化学物理研究所 |
| Recommended Citation GB/T 7714 | Deng YQ,Guo XG,Shi F,et al. Method for preparing isocyanates by liquid-phase thermal cracking. US 8,809,574 B2[P]. 2014-08-19. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| US8809574B2.pdf（841KB） | 专利 | 授权 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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