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Non-phosgene synthesis of isocyanates based on CO2: Synthesis of methyl N-phenyl carbamate through coupling route with lead compound catalysts
Gao, Junjie1,2; Li, Huiquan2; Zhang, Yi2; Fei, Weiyang1; Fei, WY
2009-11-30
Source PublicationCATALYSIS TODAY
ISSN0920-5861
Volume148Issue:3-4Pages:378-382
AbstractThe synthesis of methyl N-phenyl carbamate (MPC), the key intermediate for the non-phosgene synthesis of isocyanates based on CO2, was studied from the reaction of dimethyl carbonate and N,N'-diphenyl urea under pressure. A variety of solid catalysts were screened, which showed lead compounds such as PbO, PbO2, PbCO3, and 2PbCO(3)center dot Pb(OH)(2) had excellent catalytic activity. The characterization of XRD showed that the screened lead compound catalysts after reaction were changed into the same lead compound with the group -PbOH. With the increase of recycling times of the used lead compound catalysts, the selectivity of MPC and conversion of DPU were still about 99%. And the characterization of XRD and FRIR showed that new lead compound, which was produced with the increase of recycling times of the used lead compound catalysts, was also a lead compound with -PbOH. So the above results indicated that the real lead catalyst was the compound containing -PbOH. A possible reaction mechanism was discussed with the lead compound catalysts. (C) 2009 Elsevier B.V. All rights reserved.
KeywordIsocyanates Non-phosgene Synthesis Methyl N-phenyl Carbamate Coupling Route Lead Compound Catalysts Co2 Utilization
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1016/j.cattod.2009.07.069
Indexed BySCI ; ISTP
Language英语
WOS KeywordDIMETHYL CARBONATE ; UREAS ; CARBONYLATION ; METHANOL ; ANILINE ; AMINES
WOS Research AreaChemistry ; Engineering
WOS SubjectChemistry, Applied ; Chemistry, Physical ; Engineering, Chemical
WOS IDWOS:000272972400028
Citation statistics
Cited Times:14[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/6549
Collection湿法冶金清洁生产技术国家工程实验室
Corresponding AuthorFei, WY
Affiliation1.Tsinghua Univ, State Key Lab Chem Engn, Beijing 100084, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Gao, Junjie,Li, Huiquan,Zhang, Yi,et al. Non-phosgene synthesis of isocyanates based on CO2: Synthesis of methyl N-phenyl carbamate through coupling route with lead compound catalysts[J]. CATALYSIS TODAY,2009,148(3-4):378-382.
APA Gao, Junjie,Li, Huiquan,Zhang, Yi,Fei, Weiyang,&Fei, WY.(2009).Non-phosgene synthesis of isocyanates based on CO2: Synthesis of methyl N-phenyl carbamate through coupling route with lead compound catalysts.CATALYSIS TODAY,148(3-4),378-382.
MLA Gao, Junjie,et al."Non-phosgene synthesis of isocyanates based on CO2: Synthesis of methyl N-phenyl carbamate through coupling route with lead compound catalysts".CATALYSIS TODAY 148.3-4(2009):378-382.
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