Synthesis of crystalline ZSM-5-type material
AssigneeMobil Oil Corporation
InventorsStuart D. Hellring, Randy F. Striebel
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Abstract
This invention relates to a new form of crystalline material identified as zeolite ZSM-5-type, to a new and useful method for synthesizing said crystalline material and to use of said crystalline material prepared in accordance herewith as a catalyst for organic compound, e.g. hydrocarbon compound, conversion.
Drawings
Claims18
A method for synthesizing crystalline material exhibiting a characteristic X-ray diffraction pattern including d-spacing maxima values shown in Table 1 which comprises (i) preparing a mixture capable of forming said material, said mixture comprising sources of alkali or alkaline earth metal (M), an oxide of trivalent element (X), an oxide of tetravalent element (Y), water and 2-methylcylcohexylamine directing agent (R), and having a composition, in terms of mole ratios, within the following ranges:
- ______________________________________ YO.sub.2 /X.sub.2 O.sub.3 >50 H.sub.2 O/YO.sub.2 10 to 100 OH.sup.- /YO.sub.2 0 to 0.5 M/YO.sub.2 0 to 2.0 R/YO.sub.2 0.01 to 2.0 ______________________________________
- (ii) maintaining said mixture under sufficient conditions until crystals of said material are formed;
- and (iii) recovering said crystalline material from step (ii), said recovered crystalline material containing said R.
A mixture capable of forming crystals of ZSM-5 structure upon crystallization, said mixture comprising sources of alkali or alkaline earth metal (M), trivalent element (X) oxide selected from the group consisting of oxide of aluminum, boron, iron, gallium, indium and mixtures thereof;
- tetravalent element (Y) oxide selected from the group consisting of oxide of silicon, germanium, tin and mixtures thereof;
- water and 2-methylcyclohexylamine directing agent (R), and having a composition, in terms of mole ratios, within the following ranges:
- ______________________________________ YO.sub.2 /X.sub.2 O.sub.3 >50 H.sub.2 O/YO.sub.2 10 to 100 OH.sup.- /YO.sub.2 0 to 0.5 M/YO.sub.2 0 to 2.0 R/YO.sub.2 0.01 to 2.0. ______________________________________
A method for synthesizing crystalline material having the structure of ZSM- 5 which comprises (i) preparing a mixture capable of forming said material, said mixture comprising sources of alkali or alkaline earth metal (M);
- an oxide of trivalent element (X) selected form the group consisting of aluminum, boron, iron, indium, gallium, and combinations thereof;
- and oxide of tetravalent element (Y) selected from the group consisting of silicon, tin, germanium, and combinations thereof;
- water and 2-methylcyclohexylamine directing agent (R);
- and having a composition, in terms of mole ratios, within the following ranges:
- ______________________________________ YO.sub.2 /X.sub.2 O.sub.3 >50 H.sub.2 O/YO.sub.2 10 to 100 OH.sup.- /YO.sub.2 0 to 0.5 M/YO.sub.2 0 to 2.0 R/YO.sub.2 0.01 to 2.0 ______________________________________
- (ii) maintaining said mixture under sufficient conditions until crystals of said material are formed;
- and (iii) recovering said crystalline material from step (ii), said recovered crystalline material having a formula on an anhydrous basis and in terms of moles of oxides per y moles of YO.sub.2 as follows:
- (0.1 to 1.1)M.sub.2 O:(0.5 to 3.5)R:X.sub.2 O.sub.3 :(y)YO.sub.2
- wherein y is at least about 50.
Dependencies are inferred from the claim text.