One-Pot Synthesis of TMOS from SiO2-Enriched Minerals and Supercritical MeOH in a Flow Reactor Full article
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Chemical Engineering Journal
ISSN: 1385-8947 , E-ISSN: 1873-3212 |
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| Output data | Year: 2021, Volume: 426, Article number : 131871, Pages count : 8 DOI: 10.1016/j.cej.2021.131871 | ||
| Tags | One-pot TMOS synthesis; Continuous flow mode; Molecular sieves 3Å; Equilibrium constant | ||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Ministry of Science and Higher Education of the Russian Federation | 0239-2021-0003 |
Abstract:
An original method for direct synthesis of tetramethyl orthosilicate from SiO2 raw minerals and supercritical methanol was developed for the first time in a flow mode. The process promoted by KOH was performed at 270°С and 100 atm using 3Å zeolite molecular sieves to shift the reversible reaction toward TMOS formation by removing released water. The equilibrium constant Keq of the reaction was determined as 0.839E-08.
Silica gel (100 wt.% SiO2), quartz sand (97 wt.% SiO2), expanded perlite (73 wt.% SiO2) and vermiculite (38 wt.% SiO2) were tested as SiO2 minerals. The highest equilibrium concentration of TMOS equal to 20.4 g/L was achieved for silica gel that can be increased using larger amount of water adsorbent.
Cite:
Kozhevnikov I.V.
, Chibiryaev A.M.
, Martyanov O.N.
One-Pot Synthesis of TMOS from SiO2-Enriched Minerals and Supercritical MeOH in a Flow Reactor
Chemical Engineering Journal. 2021. V.426. 131871 :1-8. DOI: 10.1016/j.cej.2021.131871 WOS Scopus РИНЦ OpenAlex ANCAN
One-Pot Synthesis of TMOS from SiO2-Enriched Minerals and Supercritical MeOH in a Flow Reactor
Chemical Engineering Journal. 2021. V.426. 131871 :1-8. DOI: 10.1016/j.cej.2021.131871 WOS Scopus РИНЦ OpenAlex ANCAN
Dates:
| Submitted: | Apr 24, 2021 |
| Accepted: | Aug 12, 2021 |
| Published online: | Aug 18, 2021 |
| Published print: | Dec 15, 2021 |
Identifiers:
| ≡ Web of science: | WOS:000715921900004 |
| ≡ Scopus: | 2-s2.0-85113346910 |
| ≡ Elibrary: | 46999344 |
| ≡ OpenAlex: | W3194419573 |
| ≡ Chemical Abstracts: | 2021:1864812 |
| ≡ Chemical Abstracts (print): | 176:106347 |