Synthesis and application of 1-adamantyltrimethylammonium hydroxide
Chu, Xia Jr (2019)
Chu, Xia Jr
2019
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-2021090417436
https://urn.fi/URN:NBN:fi:amk-2021090417436
Tiivistelmä
This paper mainly introduces a simple and high-yield synthesis method for N,N,N-trimethyl-1-adamantyl ammonium hydroxide (TMAdaOH), an important template for MWW pure silicon zeolite ITQ-1. TMAdaOH is an basic organic compound that has important applications in the catalyst industry. Zeolite refers to a porous material with a skeleton structure. The MWW zeolite has both 10-membered ring and a 12-membered ring channel, and exhibits excellent catalytic performance in various reactions, which makes it become a new type of characteristic catalytic material. ITQ-1 zeolite is common zeolite of MWW structure, namely MWW structure of pure silicon, free of metal hetero atoms, unique pore system, excellent hydrothermal stability and acidity, making it play an important role in petrochemical industry and show wide application prospects in this field. The production of ITQ-1 zeolite requires TMAdaOH as a template to participate in the reaction. Zeolite synthesized with template shows better performance and stability than the those synthesized without template, so the selection and synthesis of template is an important subject in zeolite research.
The second part uses a multi-step approach to synthesize TMAdaOH with adamantylamine hydrochloride as a raw material. First, neutralization reaction with sodium hydroxide was carried out, and then methylation reaction was carried out under acidic conditions, followed by quaternization of methylene chloride with methyl iodide, and finally TMAdaOH was obtained by ion exchange.
In the third part, the synthetic TMDaOH and HMI were used to form a double template system. The ITQ-1 zeolite was prepared by classical hydrothermal synthesis method. The XRD data of the obtained zeolite showed that it was consistent with the theoretical data, which proved that the template was successfully synthesized.
In the fourth part, the CFI structure zeolite B-CIT-5 was prepared by using the template SDAOH which was synthesized of sparteine sulfate with the same mathod as the second part to prove that the template synthesis method is universal and not only suitable for the preparation of specific products. The obtained yield was high, which demostrated that the method we used was reasonable and effective synthesis, and can be extended and extended as a basis in the research.
The second part uses a multi-step approach to synthesize TMAdaOH with adamantylamine hydrochloride as a raw material. First, neutralization reaction with sodium hydroxide was carried out, and then methylation reaction was carried out under acidic conditions, followed by quaternization of methylene chloride with methyl iodide, and finally TMAdaOH was obtained by ion exchange.
In the third part, the synthetic TMDaOH and HMI were used to form a double template system. The ITQ-1 zeolite was prepared by classical hydrothermal synthesis method. The XRD data of the obtained zeolite showed that it was consistent with the theoretical data, which proved that the template was successfully synthesized.
In the fourth part, the CFI structure zeolite B-CIT-5 was prepared by using the template SDAOH which was synthesized of sparteine sulfate with the same mathod as the second part to prove that the template synthesis method is universal and not only suitable for the preparation of specific products. The obtained yield was high, which demostrated that the method we used was reasonable and effective synthesis, and can be extended and extended as a basis in the research.