Method for synthesizing succinic acid from maleic acid
A technology of maleic acid and succinic acid, which is applied in the direction of ozone oxidation to prepare carboxylic acid, etc., can solve the problems of low product quality, complicated process, and high requirements for operating conditions, and achieve high product quality, simplified process, and low reaction temperature Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0016] After loading 6.0 g of palladium / strongly acidic cationic resin catalyst with a palladium loading of 0.2% (mass fraction) into the fixed-bed reactor, pass hydrogen and make the pressure stable to 15 atm, and heat the reactor to 70° C. Utilize feed pump, make mass fraction be 20.0% maleic acid aqueous solution at space velocity 1.00h -1 Pass through the catalyst bed and enter the liquid collection tank. During the reaction, the hydrogen to maleic acid feed rate was maintained at a molar ratio of about 7.0. The obtained reaction solution was cooled and filtered to obtain white succinic acid crystals and a colorless filtrate. The resulting filtrate is mixed with maleic acid, and the excess hydrogen is recovered for reuse. Through HPLC analysis, the conversion rate of maleic acid reaches 99.9%, the selectivity of succinic acid is 99.8%, and the purity of succinic acid is about 99.9%.
Embodiment 2
[0018] After loading 4.0 g of platinum / silicon dioxide with a platinum loading of 0.5% (mass fraction) into the fixed-bed reactor, hydrogen was passed through to stabilize the pressure to 5 atm, and the reactor was heated to 50°C. Utilize feed pump, make mass fraction be 1.0% maleic acid aqueous solution at space velocity 5.00h -1 Pass through the catalyst bed and enter the liquid collection tank. During the reaction, the hydrogen to maleic acid feed rate was maintained at a molar ratio of about 3.0. The obtained reaction solution was cooled and filtered to obtain white succinic acid crystals and a colorless filtrate. The resulting filtrate is mixed with maleic acid, and the excess hydrogen is recovered for reuse. Through HPLC analysis, the conversion rate of maleic acid reaches 99.8%, the selectivity of succinic acid is 99.9%, and the purity of succinic acid is about 99.9%.
Embodiment 3
[0020] After loading 10.0 g of ruthenium / activated carbon catalyst with a ruthenium loading of 2.0% (mass fraction) into the fixed-bed reactor, hydrogen was passed through to stabilize the pressure to 25 atm, and the reactor was heated to 90° C. Use the feed pump to make the "acid water" with a mass fraction of 25.0% flow at a space velocity of 1.00h -1 It enters the liquid collection tank through the catalyst bed. During the reaction, the hydrogen to maleic acid feed rate was maintained at a molar ratio of about 10.0. The obtained reaction solution was cooled and filtered to obtain white succinic acid crystals and a colorless filtrate. The resulting filtrate is mixed with maleic acid, and the excess hydrogen is recovered for reuse. Through HPLC analysis, the conversion rate of maleic acid reaches 99.9%, the selectivity of succinic acid is 99.2%, and the purity of succinic acid is about 99.7%.
PUM
Property | Measurement | Unit |
---|---|---|
purity | aaaaa | aaaaa |
purity | aaaaa | aaaaa |
purity | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- 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, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com