Application of alkali modified molecular sieve serving as catalyst in reaction for conjugation preparation of conjugated linoleic acid though coin oil
A conjugated linoleic acid and molecular sieve technology, which is used in molecular sieve catalysts, physical/chemical process catalysts, preparation of organic compounds, etc., to achieve the effects of high conjugated conversion rate, easy availability of raw materials and less dosage
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
preparation example Construction
[0021] The preparation method of alkali-modified molecular sieve of the present invention comprises the following steps:
[0022] 1) Add ethyl orthosilicate to water, stir and heat up to 50-60°C, then add dodecylamine and anhydrous sodium metaaluminate, and stir evenly;
[0023] 2) Add 0.5-1.0mol / L alkali solution dropwise until the pH of the solution is 10-11, and continue to stir for 2-3 hours;
[0024] 3) Transfer the solution in step 2) into a high-pressure hydrothermal reaction kettle, remove oxygen, fill in hydrogen until the pressure in the kettle is 0.8-2.0MPa, then raise the temperature to 110-160°C, react for 40-60 hours, and terminate the reaction ;
[0025] 4) Suction filtration, washing the obtained solid with water until neutral, drying at 80-100° C. for 8-10 hours, grinding the solid and heat-treating at 450-650° C. for 5-7 hours to obtain an alkali-modified molecular sieve.
[0026] Preferably, the mass ratio of ethyl orthosilicate, water, dodecylamine, and a...
Embodiment 1
[0037] 1) Preparation of alkali-modified molecular sieves:
[0038] Add 20g of tetraethyl orthosilicate to 200mL of deionized water, stir at a constant temperature of 55°C, then add 2g of dodecylamine and 0.1g of anhydrous sodium metaaluminate, and then add dropwise 0.5mol / L NaOH solution to adjust the pH value to 10~ 11. After continuing to stir for 2 hours, transfer the solution into a polytetrafluoroethylene-lined high-pressure reactor, replace the oxygen in the reactor with nitrogen after sealing, then fill in hydrogen until the pressure in the reactor is 1.5MPa, and then raise the temperature to 160 °C, react for 40 hours. After the reaction, the material was taken out by depressurization and suction filtered, the solid was washed with deionized water until it became neutral, and then dried at 100°C for 8 hours. After the solid was ground, it was heat-treated at 550°C for 6 hours to obtain an alkali-modified molecular sieve. After measurement, the specific surface (BET...
Embodiment 2
[0042] 1) Preparation of alkali-modified molecular sieves:
[0043] Add 20g of tetraethyl orthosilicate to 250mL of deionized water, stir at a constant temperature of 50°C, then add 3g of dodecylamine and 0.15g of anhydrous sodium metaaluminate, and then add dropwise 0.7mol / L NaOH solution to adjust the pH value to 10~ 11. After continuing to stir for 2.5 hours, transfer the solution into a polytetrafluoroethylene-lined high-pressure reactor, replace the oxygen in the reactor with nitrogen after sealing, and then fill in hydrogen until the pressure in the reactor is 0.8MPa, and then raise the temperature to 130 °C, react for 48 hours. After the reaction, the material was taken out by depressurization and suction filtered, the solid was washed with deionized water to neutrality and then dried at 90°C for 9 hours, the solid was ground and then heat-treated at 450°C for 7 hours to obtain an alkali-modified molecular sieve. After determination, the specific surface (BET) of mol...
PUM
| Property | Measurement | Unit |
|---|---|---|
| Specific surface | aaaaa | aaaaa |
| Pore volume | aaaaa | aaaaa |
| Aperture | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More