Butene Isomerization Technology（2）
Sourc:The SiteAddtime:2023/06/09 Click:0
Isobutylene is a raw material for the production of chemical products such as methyl tert-butyl ether, butyl rubber, and polyisobutylene. As oilfield gas gradually replaces civil liquefied gas, the isomerization reaction of interconverting butenes according to demand has become a hot research topic.
1 | Improved molecular sieve synthesis technology
Molecular sieve is an aluminosilicate compound with uniform micropores. Molecular sieve has uniform pore size and strong acidity on the surface. It is widely used in petroleum and coal mines and other industries. The study found that by controlling the OH-/SiO2 (molar ratio, the same below), the obtained catalyst with high SiO2/Al2O3, large specific surface area and high purity has higher isobutene selectivity in the n-butene isomerization reaction .
2 | Adding precious metals to improve catalyst activity
Butene isomerization catalysts are prone to coke deposits after long-term use, which affects the activity of the catalyst. If the catalyst is to continue to maintain a high activity state, the catalyst must first be dehydrocarbonized. Coke combustion can be promoted by high temperature, and the optimum temperature is generally kept at about 565°C. Pd/Pt metals have lower temperature requirements, which can promote catalyst cycle regeneration and prolong the service life of the catalyst.
3 | Carboxylic acid modification technology
When making catalysts, carboxylic acid groups can be used for modification, and citric acid and acetic acid can improve catalysts significantly. The service life of the catalyst can be extended by acetic acid modification, a stable operation effect can be achieved, and the use efficiency and effect of isobutylene can be improved.
The current n-butene isomerization technology has accumulated rich experience. Through the research on butene isomerization technology, the four isomers of butene are organically converted. Chemical enterprises should rationally use butene isomerization devices according to their characteristics and needs, so as to maximize benefits and resource utilization.
