摘要:
This disclosure relates to a process for manufacturing a mono-alkylaromatic compound, said process comprising contacting a feedstock comprising an alkylatable aromatic compound and an alkylating agent under alkylation reaction conditions with a catalyst comprising EMM-12, wherein said EMM-12 is a molecular sieve having, in its as-synthesized form and in calcined form, an X-ray diffraction pattern including peaks having a d-spacing maximum in the range of 14.17 to 12.57 Angstroms, a d-spacing maximum in the range of 12.1 to 12.56 Angstroms, and non-discrete scattering between about 8.85 to 11.05 Angstroms or exhibit a valley in between the peaks having a d-spacing maximum in the range of 10.14 to 12.0 Angstroms and a d-spacing maximum in the range from 8.66 to 10.13 Angstroms with measured intensity corrected for background at the lowest point being not less than 50% of the point at the same XRD d-spacing on the line connecting maxima in the range of 10.14 to 12.0 Angstroms and in the range from 8.66 to 10.13 Angstroms.
摘要:
A process for the manufacture of large crystal size synthetic porous crystalline molecular sieve requires an aqueous reaction mixture that is organic structure directing agent-free, has a H 2 O/MOH molar ratio (M is an alkali metal) of 75 or less, a source of X 2 O 3 (X is a trivalent element) and a source of YO 2 (Y is a tetravalent element). The source Of X 2 O 3 and YO 2 is an amorphous material containing both X 2 O 3 and YO 2 and having a YO 2 /X 2 O 3 molar ratio of 15 to 40. The resultant highly crystalline novel materials have crystals with at least one dimension greater than 1 μm, such as greater than 3 μm.
摘要:
This disclosure relates to a molecular sieve comprising a framework of tetrahedral atoms bridged by oxygen atoms, the tetrahedral atom framework being defined by a unit cell with atomic coordinates in nanometers shown in Table 3.
摘要:
This invention relates to a crystalline molecular sieve, in its ammonium exchanged form or in its calcined form, comprising unit cells with MWW topology, said crystalline molecular sieve is characterized by diffraction streaking from the unit cell arrangement in the c direction. The crystalline molecular sieve is further characterized by the arced hkO patterns of electron diffraction pattern. The crystalline molecular sieve is further characterized by the unit cells streaking along c direction. This invention also relates to a method of making thereof.
摘要:
This invention relates to a crystalline molecular sieve having, in its as- synthesized form, an X-ray diffraction pattern including d-spacing maxima at 13.18±0.25 and 12.33±0.23 Angstroms, wherein the peak intensity of the d- spacing maximum at 13.18±0.25 Angstroms is at least as great as 90% of the peak intensity of the d-spacing maximum at 12.33±0.23 Angstroms. This invention also relates to a method of making thereof.