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Non-phosgene synthesis of hexamethylene-1,6-diisocyanate from thermal decomposition of hexamethylene-1,6-dicarbamate over Zn-Co bimetallic supported ZSM-5 catalyst
Cao, Yan1,2; Chi, Yafang1,2; Muhammad, Ammar1,2; He, Peng1,2; Wang, Liguo1,2,3; Li, Huiquan1,2,3
2019-03-01
Source PublicationCHINESE JOURNAL OF CHEMICAL ENGINEERING
ISSN1004-9541
Volume27Issue:3Pages:549-555
AbstractA non-phosgene route for the synthesis of hexamethylene-1,6-diisocyanate (HDI) was developed via catalytic decomposition of hexamethylene-1,6-dicarbamate (HDC) over Zn-Co bi-metallic supported ZSM-5 catalyst. The catalyst was characterized by FTIR and XRD analyses. Three solvents dioctyl sebacate (DOS), dibutyl sebacate (DBS) and 1-butyl-3-methylimidazolium tetrafluoroborate (BMIMBF4) were investigated and compared; DOS gave better performance. The catalytic performances for thermal decomposition of HDC to HDI using DOS as solvent were then investigated, and the results showed that, under the optimized reaction conditions, i.e., 10 wt% concentration of HDC in DOS, 250 degrees C temperature, 60 min reaction time, 83.8% yield of HDI had been achieved over Zn-Co/ZSM-5. Decomposition of the intermediate hexamethylene-1-carbamate-6-isocyanate (HMI) over Zn-Co/ZSM-5 in DOS solvent was further studied and the results indicated that yield of HDI from HMI reached to 69.6% (98.6% HDI selectively) at 270 degrees C, which further increased the yield of the total HDI (HDItol) to as high as 95.0%. Recycling of catalyst showed that HDI and HMI yield slightly decreased, and by-product yield increased after the catalyst was reused for 4 times. At last possible reaction mechanism was proposed. (C) 2018 The Chemical Industry and Engineering Society of China, and Chemical Industry Press Co., Ltd. All rights reserved.
KeywordNon-phosgene Thermal decomposition Hexamethylene-1,6-diisocyanate Hexamethylene-1,6-dicarbamate Bimetallic supported ZSM-5 catalyst
DOI10.1016/j.cjche.2018.05.001
Language英语
WOS KeywordDIMETHYL CARBONATE ; DIMETHYLHEXANE-1,6-DICARBAMATE ; 1,6-HEXANEDIAMINE ; METHANOL ; ACIDITY
Funding ProjectNational Natural Science Foundation of China[21476244] ; National Natural Science Foundation of China[21406245] ; Transformational Technologies for Clean Energy and Demonstration, Strategic Priority Research Program of the Chinese Academy of Sciences[XDA 21030600] ; Youth Innovation Promotion Association CAS[2016046]
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationNational Natural Science Foundation of China ; Transformational Technologies for Clean Energy and Demonstration, Strategic Priority Research Program of the Chinese Academy of Sciences ; Youth Innovation Promotion Association CAS
WOS IDWOS:000465111100008
PublisherCHEMICAL INDUSTRY PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/28307
Collection中国科学院过程工程研究所
Corresponding AuthorCao, Yan
Affiliation1.Chinese Acad Sci, Inst Proc Engn, CAS Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Cao, Yan,Chi, Yafang,Muhammad, Ammar,et al. Non-phosgene synthesis of hexamethylene-1,6-diisocyanate from thermal decomposition of hexamethylene-1,6-dicarbamate over Zn-Co bimetallic supported ZSM-5 catalyst[J]. CHINESE JOURNAL OF CHEMICAL ENGINEERING,2019,27(3):549-555.
APA Cao, Yan,Chi, Yafang,Muhammad, Ammar,He, Peng,Wang, Liguo,&Li, Huiquan.(2019).Non-phosgene synthesis of hexamethylene-1,6-diisocyanate from thermal decomposition of hexamethylene-1,6-dicarbamate over Zn-Co bimetallic supported ZSM-5 catalyst.CHINESE JOURNAL OF CHEMICAL ENGINEERING,27(3),549-555.
MLA Cao, Yan,et al."Non-phosgene synthesis of hexamethylene-1,6-diisocyanate from thermal decomposition of hexamethylene-1,6-dicarbamate over Zn-Co bimetallic supported ZSM-5 catalyst".CHINESE JOURNAL OF CHEMICAL ENGINEERING 27.3(2019):549-555.
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