Title:
HIERARCHICAL PORE ALL-SILICON MOLECULAR SIEVE, PREPARATION METHOD THEREFOR, AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2024/061210
Kind Code:
A1
Abstract:
Disclosed is a hierarchical pore all-silicon molecular sieve, which uses trimethylphosphine (TMP) as a probe molecule for characterization by using a solid-state nuclear magnetic resonance technology. Three characteristic peaks are displayed at chemical shift positions of -5±1 ppm, -34±1 ppm and -61±1 ppm of a 31P MAS NMR spectrogram of the molecular sieve, wherein the peak intensity of the characteristic peak at the chemical shift position of -5±1 ppm is denoted as N1; the peak intensity of the characteristic peak at the chemical shift position of -34±1 ppm is denoted as N2; the peak intensity of the characteristic peak at the chemical shift position of -61±1 ppm is denoted as N3. Then, X1 defined by formula (1) is within the range of 0.10-0.30; X1＝N1/N3(1); X2 defined by formula (2) is within the range of 0.15-0.45; X2＝N2/N3(2). When the molecular sieve is used for gas-phase Beckmann rearrangement reaction of cyclohexanone oxime, the selectivity of a caprolactam product can be improved and the service life of a catalyst can be prolonged.
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Inventors:
XIA CHANGJIU (CN)
ZHANG PENG (CN)
PENG XINXIN (CN)
XING ENHUI (CN)
ZHANG XIAOXIN (CN)
LUO YIBIN (CN)
LIN MIN (CN)
ZHU BIN (CN)
SHU XINGTIAN (CN)
ZHANG PENG (CN)
PENG XINXIN (CN)
XING ENHUI (CN)
ZHANG XIAOXIN (CN)
LUO YIBIN (CN)
LIN MIN (CN)
ZHU BIN (CN)
SHU XINGTIAN (CN)
Application Number:
PCT/CN2023/119697
Publication Date:
March 28, 2024
Filing Date:
September 19, 2023
Export Citation:
Assignee:
CHINA PETROLEUM & CHEM CORP (CN)
SINOPEC RES INSTITUTE OF PETROLEUM PROCESSING CO LTD (CN)
SINOPEC RES INSTITUTE OF PETROLEUM PROCESSING CO LTD (CN)
International Classes:
C01B37/02
Foreign References:
| CN113845124A | 2021-12-28 | |||
| US20150119569A1 | 2015-04-30 | |||
| JP2007261852A | 2007-10-11 |
Other References:
ZASUKHIN, D. S. ET AL.: "31Р NMR Spectroscopy of Adsorbed Probe Molecules as a Tool for the Determination of the Acidity of Molecular Sieve Catalysts (A Review)", PETROLEUM CHEMISTRY, vol. 61, no. 8, 30 July 2021 (2021-07-30), XP037646811, ISSN: 0965-5441, DOI: 10.1134/S0965544121080107
KOLODZIEJSKI WACLAW, HE HEYONG, KLINOWSKI JACEK: "31P solid-state NMR study of spin diffusion in the molecular sieve VPI-5 using variable-speed MAS", CHEMICAL PHYSICS LETTERS, ELSEVIER BV, NL, vol. 191, no. 1-2, 1 March 1992 (1992-03-01), NL , pages 117 - 124, XP093149100, ISSN: 0009-2614, DOI: 10.1016/0009-2614(92)85379-O
KOLODZIEJSKI WACLAW, HE HEYONG, KLINOWSKI JACEK: "31P solid-state NMR study of spin diffusion in the molecular sieve VPI-5 using variable-speed MAS", CHEMICAL PHYSICS LETTERS, ELSEVIER BV, NL, vol. 191, no. 1-2, 1 March 1992 (1992-03-01), NL , pages 117 - 124, XP093149100, ISSN: 0009-2614, DOI: 10.1016/0009-2614(92)85379-O
Attorney, Agent or Firm:
CHINA PATENT AGENT (H.K.) LTD. (CN)
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