Catalyst and preparation method
A catalyst and catalytic metal technology, applied in molecular sieve catalysts, chemical instruments and methods, separation methods, etc., can solve problems such as a large amount of hydrocarbon storage, reduced conversion efficiency, and catalyst HC leakage.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0105] Embodiment 1: Preparation of silver nanocrystals
[0106]At a temperature of about 25°C (room temperature), silver acetate (4 mmol, SA), oleic acid (4 ml, OA, technical grade, 90%, Aldrich) and trioctyl were added to a 3-neck flask equipped with a stirrer. Amine (15 mL, TOA). The resulting mixture was heated to a temperature of about 60°C under a vacuum of 1 mm Hg. As the temperature increases, silver acetate begins to dissolve in trioctylamine. Bubbling was observed in the flask due to the boiling of water present as an impurity in the reaction mass. Water is removed under vacuum as water vapor. When the temperature was raised to 60°C, silver acetate was completely dissolved in trioctylamine, and the resulting solution turned brown-grey-black, indicating that silver acetate decomposed and silver nanocrystals were formed. The temperature was then raised to 90°C and the mixture was maintained at this temperature for about 2 hours to ensure completion of the reaction....
Embodiment 2-3
[0113] Embodiment 2-3: Preparation of silver nanocrystals
[0114] Examples 2 and 3 were performed in a manner similar to that described above for Example 1, except that they were performed on a relatively larger scale. The amounts of silver acetate, oleic acid and trioctylamine used and the concentration of the resulting AgNCs in hexane and the PSD of the AgNCs are included in Table 3 below. Examples 2 and 3 show that a PSD of less than 10% can be achieved even in large scale batches.
[0115] table 3
[0116]
Embodiment 4-7
[0117] Example 4-7: Preparation of the first catalytic composition
[0118] To a 3-neck flask equipped with a stirrer was added aluminum tri-sec-butoxide (50 g) and IPA (200 mL). Then, a predetermined amount of AgNC in a hexane solution containing 43.1 grams (0.4 moles) of AgNC in hexane was added to the flask to form a first solution. The predetermined amount of AgNC in the added hexane solution and the resulting loading of AgNC in the catalyst composition are included in Table 4 below. After addition to the flask, in a separate flask with a mechanical stirrer turned on at about 60 rpm, ethyl acetoacetate (2.65 g), Triton X-114 (14 g) and 65 mL of isopropanol were added , to form the second solution. Then pour the second solution into the first solution. The resulting mixture was stirred at a temperature of about 25° C. at a speed of about 180 rpm for about 30 minutes. During 30 min of stirring, a mixture of 7.5 mL of distilled water and 85 mL of isopropanol was added dro...
PUM
| Property | Measurement | Unit |
|---|---|---|
| pore size | aaaaa | aaaaa |
| pore size | aaaaa | aaaaa |
| pore size | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More