Catalytic agent for preparing p-aminophenol by using nitrobenzene catalytic hydrogenation and preparation method thereof
A technology for catalytic hydrogenation of p-aminophenol, which is applied in the preparation of amino hydroxyl compounds, organic compounds, metal/metal oxide/metal hydroxide catalysts, etc., and can solve the problems of poor selectivity of PAP, carrier loss, and intolerable electrode materials Corrosion and other problems, to achieve the effect of improved activity and selectivity, good catalytic performance, and good hydrogen absorption effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0020] Immerse 40-60g of activated carbon purified by nitric acid in 15-20ml of chloroplatinic acid aqueous solution with a volume concentration of 4-8%, keep the temperature at 50°C for 4-6h, and cool to 20°C; prepare saturated aqueous sodium carbonate solution , adjust the impregnation solution to be alkaline; add excess hydrazine hydrate dropwise while stirring, and then keep warm on a water bath for 1-4 hours to completely reduce the chloroplatinic acid; filter the solid phase components, wash with deionized water until there is no chloride ion, Place in a vacuum dryer and dry to obtain 40-60g of Pt / C catalyst, which is ready for use; dissolve 8-12g of ammonium tetrathiomolybdate crystals (ATTM) in deionized water, add spare Pt / C, and stir magnetically under immersion conditions 1-3h, stand still for 4-8h, and dry at 60-90°C to obtain the catalyst precursor ATTM-Pt / C(I); put ATTM-Pt / C(I) into a quartz tube and place it in a tube furnace Medium roasting, the temperature is ...
Embodiment 2
[0022] In a stirred reactor at normal pressure, add 100ml of distilled water, 10ml of concentrated sulfuric acid with a mass fraction of 98%, 0.05ml of dimethyl sulfoxide, and 0.3g of MoS 2 - Pt / C catalyst, 20ml nitrobenzene. Pass N 2 , replace the air in the device, and check the airtightness. Heat up to about 87°C, keep the temperature constant, pass H 2 . Stop heating after 5 h of reaction, pass N 2 Purge, cool to room temperature, and recover the catalyst. According to GC-MS analysis, the yield of p-aminophenol is 86%.
Embodiment 3
[0024] Using the catalyst in Example 2, the reaction conditions were the same as above, and after 22 cycles, the yield of p-aminophenol in the 23rd reaction solution was determined to be 83%.
PUM
Property | Measurement | Unit |
---|---|---|
particle size | 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