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AssigneeKing Fahd University of Petroleum and Minerals
InventorM. Nasiruzzaman SHAIKH
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A solid-supported Pd catalyst is suitable for C—C bond formation, e.g., via Suzuki-Miyaura and Mizoroki-Heck cross-coupling reactions, with a support that is reusable, cost-efficient, regioselective, and naturally available. Such catalysts may contain Pd nanoparticles on jute plant sticks (GS), i.e., Pd@GS, and may be formed by reducing, e.g., K2PdCl4 with NaBH4 in water, and then used this as a “dip catalyst.” The dip catalyst can catalyze Suzuki-Miyaura and Mizoroki-Heck cross coupling-reactions in water. The catalysts may have a homogeneous distribution of Pd nanoparticles with average dimensions, e.g., within a range of 7 to 10 nm on the solid support. Suzuki-Miyaura cross-coupling reactions may achieve conversions of, e.g., 97% with TOFs around 4692 h−1, Mizoroki-Heck reactions with conversions of, e.g., a 98% and TOFs of 237 h−1, while the same catalyst sample may be used for 7 consecutive cycles, i.e., without addition of any fresh catalyst.
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The method of claim 21, wherein the particles of the particulate matrix have no average dimension less than 100 μm.
The method of claim 21, wherein the palladium catalyst is in the form of nanospheres having an average particle size of from 2.5 to 45 nm.
The method of claim 21, wherein the α-cellulose, hemicellulose, and lignin, are from jute stems.
The method of claim 21, wherein the particles of the particulate matrix comprise 20 to 60 wt. % α-cellulose, based on the total weight of the particulate matrix.
The method of claim 21, wherein the particles of the particulate matrix comprise 10 to 35 wt. % lignin, based on the total weight of the particulate matrix.
The method of claim 21, wherein the particles of the particulate matrix comprise 10 to 30 wt. % hemicellulose, based on the total weight of the particulate matrix.
The method of claim 21, wherein the particles of the particulate matrix comprise 30 to 50 wt. % α-cellulose, 15 to 30 wt. % lignin, and 15 to 25 wt. % hemicellulose, based on the total weight of the particulate matrix.
The method of claim 21, wherein the particles of the particulate matrix comprise at least 90 wt. % jute stems, based on the total weight of the particulate matrix.
The method of claim 21, wherein the palladium catalyst comprises at least 90 wt. % of palladium, relative to a total metal weight in the palladium catalyst.
A method for making a natural material-supported palladium catalyst, the method comprising:
18-20. (canceled)
Dependencies are inferred from the claim text.