Micro-mesoporous core-shell composite molecular sieve for reducing harmful ingredients of cigarettes and preparation method of micro-mesoporous core-shell composite molecular sieve

Abstract

The invention discloses a micro-mesoporous core-shell composite molecular sieve for reducing harmful ingredients of cigarettes and a preparation method of the micro-mesoporous core-shell composite molecular sieve. The preparation method comprises the following steps: adding a template agent into a solution of which the alcohol-water ratio is (1:1)-(4:3); then adding a zeolite molecular sieve; performing ultrasonic dispersion for 0.5-2 hours; dropwise adding tetraethoxysilane of which the mass is 1-1.5 times that of the zeolite molecular sieve into the zeolite molecular sieve; stirring for 24-48 hours at room temperature; extracting the template agent by using ethanol at normal temperature to obtain a mesoporous-microporous core-shell composite molecular sieve material. In the preparation method disclosed by the invention, the template agent is extracted directly by using ethanol, so that high-temperature calcination is saved, and the preparation process is simpler; the micro-mesoporous core-shell composite molecular sieve is simple and convenient in operation and equipment requirement and low in price, and has good application prospect; the micro-mesoporous core-shell composite molecular sieve has a significant adsorption effect on harmful substances especially phenol in smoke of cigarettes when being applied to a binary composite filter rod.

Description

technical field [0001] The invention belongs to the field of cigarette harm reduction, and relates to a harm reduction material and a preparation method of the material, in particular to a micro-mesoporous core-shell composite molecular sieve and a preparation method thereof. Background technique [0002] With the progress of society, smoking and environmental issues have attracted worldwide attention. The "Framework Convention on Tobacco Control" requires governments to formulate more stringent "tobacco control" laws and regulations, urging cigarette manufacturers to strictly control the release of major harmful components in cigarette smoke while reducing the amount of tar released from cigarettes. In 2009, the Zhengzhou Tobacco Research Institute led a study on the cigarette smoke hazard index of Chinese-style cigarettes, and selected seven representative components as cigarette hazard evaluation indicators, such as CO, HCN, NNK, B[a] P, phenol, etc. The inventors found...

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Problems solved by technology

[0004] In the process of realizing the present invention, the inventors have found that there are at least the following problems in the prior art: the synthesis of core-shell structure composite molecular sieves requires precise regulation of the pH value, and the use of relatively expensive templates. Finally, the templates have to pass high temperature Calcination to remove

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