Catalyst for producing crotonaldehyde
A catalyst and crotonaldehyde technology, applied in the direction of molecular sieve catalyst, catalyst activation/preparation, physical/chemical process catalyst, etc., can solve the problem of high conversion rate and high selectivity, low conversion rate of crotonaldehyde selectivity, and limit the development of crotonaldehyde and other issues, to achieve the effect of improving conversion rate and selectivity, environmental friendliness, and reducing the amount of waste water
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1~6
[0021] Weigh mlg of the alkali metal oxide precursor and dissolve it in distilled water with a mass concentration of 15%. Weigh m2g alkaline earth metal oxide precursor and m3g Al 2 o 3 , was added to the aqueous solution of the alkali metal precursor, stirred at room temperature for 5 hours, then stood still for 12 hours, and dried at 100° C. to constant weight. After grinding, add 15% of the total mass of cyanide powder and mix evenly, then add 20% of the total mass of silica sol, mix evenly, extrude on a catalyst molding machine, and then calcinate in a muffle furnace at 550°C for 4 hours , the cooled catalyst is crushed and sieved, and the 20-40 mesh catalyst is taken and put into a desiccator for standby. The preparation conditions of several catalysts are shown in Table 1.
[0022] Table 1
[0023] catalyst
[0024] 1 KOH 1.2 MgO 95.2 4.8 2 NaNO 3 8.2 MgO 25.0 75.0 3 KF 6.2 Mg(OH) 2 120.8 16.7 4 Cs 2 CO 3 11....
Embodiment 7~12
[0026] Take 20 g of the catalysts in Examples 1-6 and put them into a fixed-bed reactor. Under normal pressure and reaction temperature 300°C, with N 2 As a carrier gas, acetaldehyde is fed at a certain mass space velocity, and the obtained reaction product is analyzed by gas chromatography, and the conversion rate of acetaldehyde, the selectivity of crotonaldehyde and the selectivity of the main by-product tolualdehyde are calculated. The reaction results are shown in Table 2.
[0027] Table 2
[0028] catalyst
Embodiment 13~16
[0030] Weigh m1g of the alkali metal oxide precursor and dissolve it in distilled water with a mass concentration of 5%. Weigh m2 grams of alkaline earth metal oxide precursors and m3 grams of molecular sieves, add them into the aqueous solution of alkali metal oxide precursors, stir at room temperature for 5 hours, then let stand for 12 hours, and dry at 100°C to constant weight. After grinding, add 20% of the total mass of cyanide powder and mix evenly, then add 20% of the total mass of silica sol, after mixing evenly, extrude on a catalyst molding machine, and then calcinate in a muffle furnace at 550°C for 4 hours , the cooled catalyst is crushed, sieved, and the 20-40 mesh catalyst is taken and put into a desiccator for later use. The preparation conditions of several catalysts are shown in Table 3.
[0031] table 3
[0032] catalyst
PUM
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