Synthesis of zeolite EU-2
AssigneeImperial Chemical Industries PLC
InventorsJohn L. Casci, Barrie M. Lowe, Thomas V. Lowe
Life of this patent
Estimating the term…
Abstract
Zeolite EU-2 having a molar composition expressed by the formula: 0.5 to 1.5 R.sub.2 O:Y.sub.2 O.sub.3 : at least 70 XO.sub.2 :0 to 100 H.sub.2 O wherein R is a monovalent cation or 1/n of a cation of valency n, X is silicon and/or germanium, Y is one or more of aluminium, iron, gallium or boron, and H.sub.2 O is water of hydration additional to water notionally present when R is H, and having an X-ray pattern substantially as set out in Table 1 is prepared from a reaction mixture containing XO.sub.2 (preferably silica), Y.sub.2 O.sub.3 (preferably alumina) and a dicationic alkylated polymethylene diamine. The zeolite is useful in catalytic processes, especially for the conversion of methanol to hydrocarbons.
Claims4
A method of making zeolite EU-2 having a molar composition expressed by the formula:
- 0.5 to 1.5R.sub.2 O:Y.sub.2 O.sub.3 :at least 70XO.sub.2 :0 to 100H.sub.2 O
- wherein R is a monovalent cation or 1/n of a cation of valency n, X is silicon and/or germanium, Y is one or more of aluminum, iron, gallium or boron, and H.sub.2 O is water of hydration additional to water notionally present when R is H, and having an X-ray diffraction pattern substantially as set out in Table 1, which method comprises reacting an aqueous mixture comprising at least one oxide XO.sub.2, at least one oxide Y.sub.2 O.sub.3 and at least one alkylated derivative of a polymethylene .alpha.-.omega. diamine having the formula:
- ##STR2## wherein n is in the range from 3 to 12, R.sub.1 to R.sub.6 are each methyl, the mixture having the molar composition:
- ______________________________________ XO.sub.2 /Y.sub.2 O.sub.3 at least 70 OH.sup.- /XO.sub.2 0.1 to 6.0 (M.sup.+ + Q)/Y.sub.2 O.sub.3 0.5 to 100 Q/(M.sup.+ + Q) 0.1 to 1.0 H.sub.2 O/XO.sub.2 1 to 100 ______________________________________
- where X is silicon and/or germanium, Y is one or more of aluminum, iron, gallium, boron, M is an alkali metal or ammonium and Q is the aforesaid alkylated derivative of a polymethylene diamine, or a precursor thereof.
Dependencies are inferred from the claim text.