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US 4,060,590 AGranted
Zeolite Nu-1
AssigneeImperial Chemical Industries PLC
InventorsThomas Vincent Whittam, Barry Youll
Life of this patent
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Abstract
New zeolite "nu-1" has a silica to alumina ratio of 20 to 150 and a characteristic X-ray diffraction pattern and adsorption properties. It is made from a reaction mixture containing a methylated quaternary compound. In its hydrogen form it is highly active and selective in the isomerization of xylenes.
Claims4
Zeolite nu-1 having a composition expressed by the formula
- 0.9 to 1.3 R.sub.2 O . Al.sub.2 O.sub.3 . 20 to 150 SiO.sub.2 . 0 to 40 H.sub.2 O
- where R is one or more of hydrogen, ammonium, phosphonium or 1/n of a cation having a valency n and having an X-ray diffraction pattern when R is H substantially as shown in Table 1.
Dependencies are inferred from the claim text.