A kind of MFI structure molecular sieve containing phosphorus and loaded metal and preparation method thereof
A technology of supporting metals and molecular sieves, applied in molecular sieve catalysts, chemical instruments and methods, molecular sieves and alkali exchange compounds, etc., can solve the problems of poor hydrothermal stability, difficult production, and high three-waste discharge, and achieve low total acid content and reduced Cracking activity, effect of increasing aromatics content
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0037] The present disclosure also provides a preparation method of the phosphorus-containing and metal-loaded MFI structural molecular sieves provided in the present disclosure, the preparation method comprising: a, performing ammonium exchange treatment on the sodium-type MFI structural molecular sieves to obtain ammonium exchange molecular sieves; wherein, Calculated in sodium oxide and based on the total dry basis weight of ammonium-exchanged molecules, the sodium content of the ammonium-exchanged molecular sieve is less than 0.2% by weight; Carry out dealumination treatment in the composite acid dealumination agent solution composed of acid, and after filtering and washing, obtain dealumination molecular sieve; c, after carrying out phosphorus modification treatment and load metal loading treatment on the dealumination molecular sieve obtained in step b to obtain a modified molecular sieve; d, subjecting the modified molecular sieve obtained in step c to hydrothermal roast...
Embodiment 1
[0063] With ZSM-5 molecular sieve (catalyst Qilu branch production, no amine synthesis, n(SiO 2 ) / n(Al 2 o 3 )=27) with NH 4 Cl solution exchange wash to Na 2 O content is lower than 0.2% by weight, filters to obtain filter cake; Get above-mentioned molecular sieve 100g (dry basis) and add water and be mixed with the molecular sieve slurry of solid content 10% by weight, add oxalic acid 20g in stirring, then 200g hydrochloric acid (mass fraction 10%) and 167g of fluosilicic acid (mass fraction 3%) was added in parallel, and the addition time was 30min; the temperature was raised to 65°C and stirred at a constant temperature for 1h, filtered and washed until the filtrate was neutral, and the filter cake was beaten with water to obtain a molecular sieve slurry with a solid content of 40% by weight; 2.4 g H 3 PO 4 (Concentration 85% by weight) and 6.6gZn(NO 3 ) 2 ·6H 2 O was dissolved in deionized water, and ammonia water was added to adjust the pH=6, then added to the mo...
Embodiment 2
[0081] With ZSM-5 molecular sieve (catalyst Qilu branch production, no amine synthesis, n(SiO 2 ) / n(Al 2 o 3 )=27) with NH 4 Cl solution exchange wash to Na 2 O content is lower than 0.2% by weight, filters to obtain filter cake; Get above-mentioned molecular sieve 100g (dry basis) and add water and be mixed with the molecular sieve slurry of solid content 10% by weight, add citric acid 40g in stirring, then add 100g sulfuric acid (mass fraction 10%) Add 500 g of fluosilicic acid (3% by mass) in parallel for 30 minutes; raise the temperature to 45° C. and stir at a constant temperature for 1 hour, filter and wash until the filtrate is neutral; add water to the filter cake and beat to obtain a molecular sieve slurry with a solid content of 40% by weight; 2.0gH 3 PO 4 (concentration 85% by weight) and 3.6 grams of Ga 2 (SO 4 ) 3 16H 2 O was dissolved in deionized water, and ammonia water was added to adjust the pH to 4, then added to the molecular sieve slurry, mixed ev...
PUM
Property | Measurement | Unit |
---|---|---|
pore size | aaaaa | aaaaa |
diameter | 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