Cao Yan; Chi Yafang; Muhammad Ammar; He Peng; Wang Liguo; Li Huiquan
Source Publicationchinesejournalofchemicalengineering
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.
Document Type期刊论文
First Author Affilication中国科学院过程工程研究所
Recommended Citation
GB/T 7714
Cao Yan,Chi Yafang,Muhammad Ammar,et al. nonphosgenesynthesisofhexamethylene16diisocyanatefromthermaldecompositionofhexamethylene16dicarbamateoverzncobimetallicsupportedzsm5catalyst[J]. chinesejournalofchemicalengineering,2019,27(3):549.
APA Cao Yan,Chi Yafang,Muhammad Ammar,He Peng,Wang Liguo,&Li Huiquan.(2019).nonphosgenesynthesisofhexamethylene16diisocyanatefromthermaldecompositionofhexamethylene16dicarbamateoverzncobimetallicsupportedzsm5catalyst.chinesejournalofchemicalengineering,27(3),549.
MLA Cao Yan,et al."nonphosgenesynthesisofhexamethylene16diisocyanatefromthermaldecompositionofhexamethylene16dicarbamateoverzncobimetallicsupportedzsm5catalyst".chinesejournalofchemicalengineering 27.3(2019):549.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Cao Yan]'s Articles
[Chi Yafang]'s Articles
[Muhammad Ammar]'s Articles
Baidu academic
Similar articles in Baidu academic
[Cao Yan]'s Articles
[Chi Yafang]'s Articles
[Muhammad Ammar]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Cao Yan]'s Articles
[Chi Yafang]'s Articles
[Muhammad Ammar]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.