Na_xH_(3-x)PW_(12)O_(40)催化苯乙烯的烷基化反应(英文)

Alkylation of Phenol with Styrene over Na_xH_(3-x)PW_(12)O_(40)

研究了磷钨酸 (H3PW12 O4 0 ,简记为PW12 )及其钠盐 (NaxH3-xPW12 O4 0 ,简记为NaxH3-x,x =1～ 3)催化苯酚与苯乙烯的烷基化反应 .NH3 TPD及吡啶热脱附结果表明 :随着钠含量的增加 ,催化剂的酸性及催化活性皆依次降低 :PW12 >Na1H2 >Na1.5H1.5>Na2 H1>Na2 .5H0 .5>Na3.

tungstophosphoric acid (H 3PW 12 O 40 ,abbreviated as PW 12 ) and its partial Na salts (Na x H 3-x PW 12 O 40 ,abbreviated as Na x H 3-x , x =1～3) were studied as catalysts for the alkylytion of phenol with styrene.The acidity of Na x H 3-x ,which was examined by NH 3 TPD and thermal desorption of pyridine,decreased with the increase of the Na content,corresponding to the catalytic activity sequence:PW 12 >Na 1H 2>Na 1.5 H 1.5 >Na 2H 1>Na 2.5 H 0.5 >Na 3.