Defective metal-organic framework desulfurization adsorbent and its preparation method and use

• Main Authors: Jiahui Fu, Xinyue Liu, Jinghua Du, Yushan Li, Yonghou Xiao, Zhigang Yan
• Format: Patent
• Language: English
• Published: 12.07.2023
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; THEIR RELEVANT APPARATUS; TRANSPORTING

A method of preparing a defective metal-organic framework suitable for use as a desulfurization adsorbent. The preparation method comprises initially dissolving trimesic acid and 5-hydroxyisophthalic acid in a solvent and sonicating them to form solution 1. Copper nitrate trihydrate is added to the solution to form solution 2. Solution 2 is then subjected to a microwave-assisted synthesis to obtain the desired metal-organic framework. The solvent can be one or more of water, anhydrous ethanol, N,N-dimethylformamide or acetone. Preferably the microwave-assisted synthesis involves heating from 20-35 ℃ to 95-105 ℃ at a rate of 4-6 ℃min-1, maintaining this target temperature for between 10 and 20 min followed by a second heating step to between 115 and 125 ℃ at a rate of 1-2 ℃ and maintaining this temperature for 30 mins. A microwave power of between 500-1000 W is used. Preferably the molar ratio of benzene-1,3,5-tricarboxylic acid and 5-HIPA is between 1-9 and 3-7. Post-treatment can include washing, drying, extruding and grinding. Use of the defective MOF, in the adsorption and removal of sulfides from oil, is also described.