Preparation method of Cu-SSZ-13 molecular sieve

Abstract

The invention provides a preparation method of a Cu-SSZ-13 molecular sieve. The method comprises the following steps: (1) mixing an aluminum source, sodium hydroxide, a Cu-TEPA complex and a templateagent with deionized water, uniformly stirring, then adding a silicon source, continuously stirring till the materials are uniformly mixed to obtain a mixture; (2) crystallizing the mixture for 48-96hours at 120-170 DEG C to obtain a crystallized product; (3) drying the crystallized product for 8-12 hours at 80-120 DEG C to obtain a dried product; and (4) roasting the dried product for 6-10 hoursat 500-600 DEG C to obtain the Cu-SSZ-13 molecular sieve. The molecular sieve has broad application prospects in the fields of the petrochemical industry, MTO reaction, exhaust purification and the industry of fine chemicals, and can be used as a catalyst for removing NOx in the automobile exhaust.

Description

technical field [0001] The invention relates to the technical field of modified catalysts, in particular to a method for preparing Cu-SSZ-13 molecular sieves. Background technique [0002] Over the past few decades, nitrogen oxides (NO x ) have caused many environmental problems, such as: acid rain and photochemical smog in cities, nitrogen oxides in motor vehicle exhaust, etc. In the United States, the European Union and Japan, a series of regulations to strictly control the exhaust emissions of nitrogen oxides have been promulgated. x content is required to be controlled at a lower level. Therefore, the development of newer and more effective exhaust gas purification technology has become a hot spot and a top priority in current research. [0003] In addition, due to the skyrocketing oil price in recent years, the technology of converting methanol into light olefins (MTO) has attracted people's attention, and the research focus is mainly on the screening and preparation...

AI Technical Summary

Problems solved by technology

However, there are relatively few domestic and foreign literatures on Cu-SSZ-13 molecular sieves due to the following reasons

First of all, the template agent for preparing Cu-SSZ-13 molecular sieve is difficult to buy in China and is expensive; secondly, the reaction cycle for preparing Cu-SSZ-13 molecular sieve is long, which increases the cost of preparing molecular sieve Cu-SSZ-13

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