Molecular sieve-based catalyst used for dechloridation of methane chloride
A molecular sieve-based, monochloromethane technology, used in molecular sieve catalysts, physical/chemical process catalysts, incinerators, etc., can solve the problems of low specific surface area of the carrier, single component, low dechlorination efficiency, etc., to improve the dechlorination capacity. , less by-products, high dechlorination efficiency
Inactive Publication Date: 2015-05-13
BEIJING UNIV OF CHEM TECH
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Problems solved by technology
[0005] Most of the above dechlorination agents use oxides or alkali metals as active components, the dechlorination efficiency is low, the components are single, and the specific surface area of the carrier is low
Method used
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Embodiment 1
[0024] 1 g of dried H-ZSM-5 (Si / Al=30) was pressed into tablets to obtain 40-60 mesh molecular sieves. According to BET analysis, the specific surface area of the prepared catalyst carrier is 304.7m 2 / g.
Embodiment 2
[0026] 1 g of dried H-USY (Si / Al=25) was pressed into tablets to obtain 40-60 mesh molecular sieves. According to BET analysis, the specific surface area of the prepared catalyst carrier is 423.3m 2 / g.
Embodiment 3
[0028] 1 g of dried H-Beta (Si / Al=22) was pressed into tablets to obtain 40-60 mesh molecular sieves. According to BET analysis, the specific surface area of the prepared catalyst carrier is 443.0m 2 / g.
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The invention relates to a molecular sieve-based catalyst used for dechlorination of methane chloride. The molecular sieve-based catalyst is characterized by comprising a micropore molecular sieve carrier and an oxide of a transitional metal element; the molecular sieve-based catalyst is prepared through the following method: impregnating 1 g of dried micropore molecular sieve into a 50 ml nitrate ethyl alcohol solution, wherein the load quantity of the transitional metal accounts for 5 wt%; stirring at the room temperature, using a rotary evaporimeter for distillation until dried, then drying at the temperature of 80 to 120 DEG C for 8 to 12 hours, and roasting at the temperature of 500 to 600 DEG C for 4 to 8 hours inside a muffle furnace. The catalyst for dechlorination, provided by the invention, adopts an impregnation method to prepare a transitional metal loading type ZSM-5 catalyst. Through synergistic effect of the transitional metal and the molecular sieve, the dechlorination capability of a chlorine contained volatile organic compound is improved. The catalyst provided by the invention is used for removing chlorine in methane chloride.
Description
technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a catalyst preparation method for improving the dechlorination performance of monochloromethane. Background technique [0002] Organochlorine compounds are important compounds widely used in various chemical raw materials and reagents. Some of these compounds are not only highly toxic, but also difficult to degrade, posing a threat to both the environment and humans. Chlorine-containing volatile organic compounds (CVOCs) are an important class of volatile organic compounds (VOCs). It is mainly divided into two categories: small molecule organic chlorides and high polymer chlorides. Chloromethane is a small molecular chloride and is mainly used in the production of methylchlorosilane, polysilicone, methylcellulose, and tetramethyllead. A small amount is used in the production of quaternary ammonium compounds and pesticides. It is a colorless, toxic and fl...
Claims
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IPC IPC(8): B01J29/40F23G7/07
Inventor 张润铎石兆源陈标华刘宁
Owner BEIJING UNIV OF CHEM TECH
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