The present invention is a kind of micro-porous spherical crosslinked copolymer ligand rhodium carbonylation of methanol synthesis catalyst. Wherein the copolymer of vinyl pyridine ligand, ethylene glycol diester formed crosslinked copolymer. Use of ligands N, O donor atoms with four rhodium carbony.....
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One kinds of shape memory alloys are driven by the non-wheel motor mechanism, comprising: a main body frame, which forms a receiving space; turning portion, provided on one side of the body frame can be rotated relative to the main frame and including a ratchet (3 ); and a mobile portion, provided o.....
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