126165-90-0Relevant academic research and scientific papers
Phosphoric acid modified SBA-15 as a highly efficient heterogeneous catalyst for the synthesis of 4,4′-diamino-3,3′-dibutyl-diphenyl methane
Xu, Qiaoling,Liu, Zhi,Ma, Rui,Li, Dao,Wang, Xingyi
, p. 438 - 441 (2010)
Phosphoric acid modified SBA-15 (P/SBA-15) was employed as catalyst in the synthesis of 4,4′-diamino-3,3′-dibutyl-diphenyl methane (MBTBA) via condensation of o-tert-butylaniline with paraformaldehyde. It performed more efficiently than HY, kaolinite, γ-Al2O3 in heterogeneous reaction and HCl in homogeneous catalysis did. The catalyst preparation and reaction conditions were investigated and the yield reached 50% under the optimized term. The BET and Py-FTIR results suggested that the excellent performance of P/SBA-15 in the synthesis of MBTBA should be attributed to the weak acidity of the material and its large pore size that facilitated the diffusion of substrate and product.
Synthesis method of 4,4-diamino 3,3-di-tert-butyl diphenylmethane
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Paragraph 0012; 0013; 0014, (2017/03/18)
The invention aims at providing a synthesis method of 4,4-diamino 3,3-di-tert-butyl diphenylmethane. According to the process, o-tert-butyl aniline is used as raw materials to perform further a condensation reaction with formaldehyde under the effect of solid acid catalysts to obtain the 4,4-diamino 3,3-di-tert-butyl diphenylmethane. The reaction temperature is 90 to 150 DEG C; the reaction time is 1 to 8 hours. The o-tert-butyl aniline can be obtained through methyl tertiary butyl ether or tert-butyl alcohol alkylation reaction via aniline; the raw material cost is greatly reduced; the huge possibility is provided for the industrial application of the 4,4-diamino 3,3-di-tert-butyl diphenylmethane. The catalyst is montmorillonoid or kaolin with layered structures sold in the market. The catalyst can be cyclically used. High activity is realized on the synthesis of 4,4-diamino 3,3-di-tert-butyl diphenylmethane from the o-tert-butyl and the formaldehyde. The process belongs to a green environment-friendly and efficient synthesis process for the 4,4-diamino 3,3-di-tert-butyl diphenylmethane.
Confinement effect as a tool for selectivity orientation in heterogeneous synthesis of 4,4′-diamino-3,3′-dibutyl-diphenyl methane over montmorillonite catalysts
Liu, Zhi,Xu, Qiaoling,Peng, Xutao,Li, Dao,Wang, Xingyi
experimental part, p. 55 - 59 (2010/10/01)
Montmorillonite was successfully employed as a heterogeneous catalyst in the condensation of o-tert-butylaniline with paraformaldehyde for its significant confinement effect on the synthesis of 4,4′-MBTBA.
