Disordered ABC-6 molecular sieve

A molecular sieve belonging to the ABC-6 framework family with disorder in the ABC stacking sequence essentially composed of double-six-ring periodic building units and having a mole ratio of silicon oxide to aluminum oxide from about 8 to about 60, obtainable by a method comprising the steps of:

• i) preparing a synthesis mixture comprising at least one crystalline molecular sieve containing six-ring structural features, a source of alkali or earth alkali (A), at least one OSDA and water in molar ratios of:
• SiO2/Al2O3
• 8-60
• OSDA/SiO2
• 0.01-1.0
• A/SiO2
• 0.01-1.0
• OH/SiO2
• 0.01-1.5
• H2O/SiO2
• 2-200
• ii) subjecting the mixture to conditions capable of crystallizing the molecular sieve;
• and
• iii) separating the molecular sieve product;
• wherein the molecular sieve belonging to the ABC-6 framework family with disorder in the ABC stacking sequence belongs to the disordered CHA-GME series;
• and
• wherein the as-synthesized form of the molecular sieve has a powder X-ray diffraction pattern collected in Bragg-Brentano geometry with a variable divergence slit using Cu K-alpha radiation essentially as shown in the following table:
• 2-Theta (°)
• d-spacing (Å)
• Relative peak area
• Peak character
• 7.45-7.54
• 11.85-11.72
• W-M
• Broad to sharp
• 9.55-9.65
• 9.24-9.15
• VS-W
• Sharp to broad
• 11.40-11.66
• 7.75-7.58
• W-M
• Broad to sharp
• 12.90-13.04
• 6.85-6.78
• S-W
• Sharp
• 14.07-14.21
• 6.29-6.23
• M-W
• Sharp to broad
• 14.89-15.12
• 5.94-5.85
• W
• Broad to sharp
• 16.08-16.27
• 5.50-5.44
• VS-W
• Sharp to broad
• 17.17-17.34
• 5.16-5.11
• W-S
• Broad to sharp
• 17.71-18.00
• 5.00-4.92
• VS-S
• Sharp
• where the relative areas of the observed peaks in the 2-Theta range 7-19 degrees are shown according to:
• W=weak:
• 0-20%;
• M=medium:
• 20-40%;
• S=strong:
• 40-60% and VS=very strong:
• 60-100%.