A method for preparing cis-pinane by hydrogenation of α-pinene
A technology for hydrogen preparation and pinene, which is applied in the field of α-pinene hydrogenation to prepare cis-pinene, can solve the problems of high reaction temperature and reaction pressure, poor catalyst reusability, complex reaction condition system, etc., and achieves good repeatability. , environment-friendly, simple effect of catalyst separation
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0033] Embodiment 1 Catalyst Fe 3 o 4 @SiO 2 @C 12 @NH 2 Preparation of / Ru
[0034] S 1 , Nanoparticle Fe 3 o 4 The preparation weighs 3.4g FeCl respectively 3 ·6H 2 O and 1.25 g FeCl 2 4H 2 O was added to a three-necked flask, followed by 100ml of water and 6ml of 25% ammonia water, stirred at 60°C for 40min, separated by an external magnetic field, washed with pure water several times, and vacuum-dried at 60°C for 4h to obtain Fe 3 o 4 Nanoparticles;
[0035] S 2 , Magnetic carrier Fe 3 o 4 @SiO 2 The preparation weighs 1.4g Fe 3 o 4 Add it to a three-necked flask, then add 5ml of 25% ammonia water, 70ml of water and 280ml of ethanol, dropwise add 1ml of TEOS (tetraethyl orthosilicate), stir mechanically at room temperature for 8h, apply a magnetic field to separate, wash with water and ethanol respectively Three times; vacuum drying at 50°C for 8 hours to obtain the magnetic carrier Fe 3 o 4 @SiO 2 ;
[0036] S 3 , Fe 3 o 4 @SiO 2 @C 12 @NH 2 P...
Embodiment 2
[0042] Example 2 Preparation of cis-pinane by hydrogenation of α-pinene
[0043] Weigh 1g of α-pinene and add it to a stainless steel mechanically stirred kettle, then add 20ml of water, weigh 20mg of magnetic amphiphilic catalyst and mix evenly, replace the gas in the kettle with 1MPa hydrogen for 4 times, then flush into 1MPa hydrogen, at 40°C Under mechanical stirring reaction 1h, after the reaction finishes, the catalyst is separated from the product under an external magnetic field, after extraction with n-heptane, the upper product phase is collected and quantitatively analyzed by chromatography. The conversion rate of α-pinene is 99.6%. The selectivity of pinane is 98.5%.
Embodiment 3
[0044] The reuse of embodiment 3 catalyst
[0045] Weigh 1g of α-pinene and add it to a stainless steel mechanically stirred kettle, then add 20ml of water, weigh 20mg of amphiphilic magnetic catalyst and mix evenly, replace the gas in the kettle with 1MPa hydrogen for 4 times, then flush into 1MPa hydrogen, at 40°C Under mechanical stirring reaction for 1h, after the reaction is over, the catalyst is separated from the product under an external magnetic field, the separated catalyst is reused, the above experimental steps are repeated, the catalyst is reused 7 times, and the conversion rate of α-pinene reaches 95.2%. The selectivity of alkane reaches 98.5%, Fe 3 o 4 @SiO 2 @C 12 @NH 2 The conversion and selectivity results after repeated use of / Ru are shown in Figure 5 ; The catalyst was reused 8 times, the conversion rate of α-pinene reached 85.2%, and the selectivity of cis-pinene reached 95.7%.
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More