Composite oxide catalyst for synthesizing isophthalonitrile as well as preparation and application of composite oxide catalyst
By using heterophase metal catalysts such as manganese, cobalt, copper, etc., and introducing other metal and non-metal heteroatoms, the structure of the catalyst is regulated, and the existing catalysts are solved, with high cost, low activity and poor selectivity when producing isophthalene, and efficient and low-cost isophthalene production is achieved.
CN119657161AActive Publication Date: 2025-03-21DALIAN INSTITUTE OF CHEMICAL PHYSICS CHINESE ACADEMY OF SCIENCES
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Patent Information
- Application Number
- CN202311222157.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-09-21
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2043-09-21
AI Technical Summary
Technical Problem
The existing catalysts have problems such as high cost, low reactivity, poor selectivity and low product yield when producing isophthalonitrile.
Method used
The heterophase metal catalyst with manganese, cobalt and copper as the main body is used, and the number of lattice oxygen and crystal surface defects of the catalyst is regulated by introducing alkali metals, alkaline earth metals, transition metals and non-metallic heteroatoms to improve catalytic activity and water resistance.
Benefits of technology
The high conversion rate of m-xylene and the high yield of isophthalene are achieved, with a selectivity of 99.3%, while reducing the reaction temperature, extending the service life of the catalyst, avoiding the use of precious metals, and reducing production costs.
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Abstract
The invention discloses a preparation method and application of a catalyst for producing isophthalonitrile from m-xylene, the catalyst comprises an active component, and the active component contains manganese, cobalt, copper, at least one of optional sodium, potassium, magnesium and calcium, at least one of optional iron, nickel, zinc, aluminum and lead, and at least one of optional boron, phosphorus and sulfur. In the presence of the catalyst, m-xylene is used as a raw material, and one-step ammoxidation is carried out in the atmosphere of air and ammonia gas to obtain isophthalonitrile. The catalyst used in the invention has the advantages of low cost, good thermal conductivity, strong water resistance, strong cycle stability, high reaction activity, reduction of reaction temperature, inhibition of deep oxidation, and improvement of reaction selectivity.
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