Process for catalytic synthesis of phthalide from phthalic anhydride
A technology of phthalide and phthalic anhydride, which is applied in the field of catalytic synthesis of phthalide from phthalic anhydride, which can solve the problems of environmental pollution and easy crushing of catalysts, and achieve the effects of environmental friendliness, high activity and stability, and low post-processing cost
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0016] Preparation of catalyst by impregnation method:
[0017] 1) Pretreatment of the carrier, the SiO 2 The carrier is calcined at 400-600°C for 3-5 hours;
[0018] 2) loading active components, the carrier pretreated in step 1) is impregnated with an aqueous nickel nitrate solution with a nickel content of 10% by weight for 6 hours at 20° C., then dried at 110° C., and calcined at 500° C. for 4 hours, Finally, the catalyst for the hydrogenation of phthalic anhydride to phthalide can be obtained after reduction at 500° C. for 3 hours in a hydrogen atmosphere.
[0019] 700 mg Ni / SiO 2 The catalyst was added into a 100 ml autoclave, and then 17.8 grams of phthalic anhydride and 41.5 grams of solvent phthalide were added into the autoclave. The reaction temperature was 150° C., the reaction hydrogen pressure was 3.0 MPa, and the reaction time was 4 hours. The conversion rate of phthalic anhydride was 85.5%, and the recovery of phthalide The rate is 69.7%.
Embodiment 2
[0021] Catalyst preparation process is the same as embodiment 1, and difference is that catalyst uses TiO 2 -ZrO 2 As a carrier, the nickel content is 15wt%. 700 mg Ni / TiO 2 -ZrO 2 The catalyst was added into a 100 ml autoclave, the reaction temperature was 170° C., the reaction hydrogen pressure was 3.2 MPa, other conditions were the same as in Example 1, and the reaction time was 5 hours. The conversion rate of phthalic anhydride was 93.3%, and the yield of phthalide was 88.7%.
Embodiment 3
[0023] Catalyst preparation process is the same as embodiment 2, and difference is that catalyst uses TiO 2 -SiO 2 as the carrier. 700 mg Ni / TiO 2 -SiO 2 The catalyst was added into a 100 ml autoclave, the reaction temperature was 180° C., the reaction hydrogen pressure was 3.0 MPa, other conditions were the same as in Example 1, and the reaction time was 6 hours. The conversion rate of phthalic anhydride was 98.5%, and the yield of phthalide was 91.4%.
PUM
Login to view more Abstract
Description
Claims
Application Information
Login to view more - R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap