Abstract: A method of preparing a surface modifier for nanoparticles, and a dispersion of inorganic oxide nanoparticles are provided. The surface modifier is formed by hydrolyzing 1 part by weight of an alkoxysilane compound with 1˜9 parts by weight of an alcohol/water solution, and the alkoxysilane compound is hydrolyzed to form a silanol. The weight ratio of alcohol to water is 60:40˜95:5. The alcohol/water solution can control the degree of forming of silanol, and thus prevents self-condensation of the silanol. The dispersion is formed by dispersing inorganic oxide nanoparticles in the aforesaid surface modifier, and can be used in the manufacture of inorganic-organic polymeric functional materials, especially anti-UV polyester products.

Abstract: A process for separating p-diethylbenzene from a diethylbenzene isomers mixture by selective adsorption of p-diethylbenzene on a silicalite adsorbent is disclosed in the present invention, wherein a compressed high pressure CO.sub.2 or propane is used as a carrier for carrying a fixed amount of the diethylbenzene isomers mixture to the silicalite adsorbent bed for the selective adsorption, a first stage effluent stream containing a rich meta-diethylbenzene (m-DEB) and/or ortho-diethylbenzene (o-DEB), but having substantially no para-diethylbenzene (p-DEB) is eluted from the adsorbent bed; when p-DEB of the mixture starts to appear in the first stage effluent stream, a much higher pressurized CO.sub.2 or propane used as a desorbent is then fed into the adsorbent bed, and a second stage effluent stream conaining a rich p-DEB, but having substantially no other DEB isomers is thereby eluted from the adsorbent bed.