33results about How to "Strong chemical bonding" patented technology

The invention belongs to the field of catalytic materials, and particularly relates to a millimeter ball catalyst for one-step synthesis of chiral alcohol and chiral ester from acetophenone. Metal andenzyme are assembled in the catalyst, the particle size is 0.9-3.0 mm, and the mechanical strength is as high as 3.0-15.0 N. A preparation method comprises the following steps of adding silicon oxidenanoparticles loaded with metal nanometer Pd and silicon oxide nanoparticles loaded with candida antarctica lipase B into deionized water, and performing uniform stirring and mixing to obtain a two-component silicon oxide mixed solution; continuously dripping the double-component silicon oxide mixed solution on tiled super-hydrophobic silicon oxide powder, and performing slow rolling to form a droplet millimeter ball which has a silicon oxide hydrophobic shell; collecting the droplet millimeter ball, and slowly drying the droplet millimeter ball; and finally, performing drip washing with acetone, and performing vacuum drying to obtain the millimeter ball for encapsulating the metal and enzyme dual-catalyst. The catalyst can be directly loaded into a fixed bed reactor to synthesize the chiral alcohol and the chiral ester from the acetophenone in one step.