The invention relates to a molecular sieve SCM-14, a preparation process and use thereof. The molecular sieve has a schematic chemical composition of a formula of “SiO.sub.2.1/nGeO.sub.2” or a formula of “kF.mQ.SiO.sub.2.1/nGeO.sub.2.pH.sub.2O”, wherein the molar ratio of silicon to germanium, n, satisfies n≤30, and other values and symbols are defined in the specification. The molecular sieve has unique XRD diffraction data and can be used as an adsorbent or a catalyst.

A process comprising hydrothermally synthesizing a titanium-containing zeolitic material having framework type MWW in the presence of an MWW template compound, obtaining a mother liquor comprising water, a first portion of the MWW template compound and a titanium-containing zeolitic material having framework type MWW comprising a second portion of the MWW template compound, separating the first portion of the MWW template compound from the mother liquor and recycling the first portion of the MWW template compound into a hydrothermal synthesis of a titanium-containing zeolitic material having framework type MWW.

The invention relates to a molecular sieve SCM-15, a preparation process and use thereof. The molecular sieve comprises a schematic chemical composition of a formula of “SiO.sub.2.GeO.sub.2”, wherein the molar ratio of silicon and germanium satisfies SiO.sub.2/GeO.sub.2≥1. The molecular sieve has unique XRD diffraction data and can be used as an adsorbent or a catalyst.

Described herein is a process for producing a zeolitic material having an MWW framework structure containing YO.sub.2 and B.sub.2O.sub.3, in which Y stands for a tetravalent element. The process includes the steps of (i) preparing a mixture containing one or more sources for YO.sub.2, one or more sources for B.sub.2O.sub.3, one or more organotemplates, and seed crystals, (ii) crystallizing the mixture obtained in (i) for obtaining a layered precursor of the MWW framework structure, and (iii) calcining the layered precursor obtained in (ii) for obtaining the zeolitic material having an MWW framework structure. Also disclosed herein are synthetic boron-containing zeolites obtain by the process and uses thereof.

A molecular sieve material, EMM-17, has in its as-calcined form, a total surface area of greater than 550 m.sup.2/g and/or an external surface area of greater than about 100 m.sup.2/g as measured by the BET Method, and a specific X-ray diffraction pattern.

The invention relates to a molecular sieve SCM-15, a preparation process and use thereof. The molecular sieve comprises a schematic chemical composition of a formula of SiO.sub.2.GeO.sub.2, wherein the molar ratio of silicon and germanium satisfies SiO.sub.2/GeO.sub.21. The molecular sieve has unique XRD diffraction data and can be used as an adsorbent or a catalyst.

The invention relates to a molecular sieve SCM-14, a preparation process and use thereof. The molecular sieve has a schematic chemical composition of a formula of SiO.sub.2.1/nGeO.sub.2 or a formula of kF.mQ.SiO.sub.2.1/nGeO.sub.2.pH.sub.2O, wherein the molar ratio of silicon to germanium, n, satisfies n30, and other values and symbols are defined in the specification. The molecular sieve has unique XRD diffraction data and can be used as an adsorbent or a catalyst.

A molecular sieve having the framework structure of ZSM-5 is described comprising crystals having an external surface area in excess of 100 m.sup.2/g (as determined by the t-plot method for nitrogen physisorption) and a unique X-ray diffraction pattern.

A new crystalline aluminosilicate zeolite comprising a new framework has been synthesized that has been designated UZM-55. This zeolite is represented by the empirical formula:
M.sup.+.sub.mR.sub.rAl.sub.1-xE.sub.xSi.sub.yO.sub.z
where M represents a metal or metals selected from zinc or Group 1 (IUPAC 1), Group 2 (IUPAC 2), Group 3 (IUPAC 3) or the lanthanide series of the periodic table including sodium, potassium or a combination of sodium and potassium cations, R is an organic structure directing agent or agents derived from reactants R1 and R2 such as where R1 is diisopropanolamine and R2 is a chelating diamine, and E is an element selected from the group consisting of gallium, iron, boron and mixtures thereof. Catalysts made from UZM-55 have utility in various hydrocarbon conversion reactions. The calcined zeolite is used in hydrocarbon conversion reactions.

The zeolite UTD-1 may be formed under hydrothermal synthesis conditions using a directing agent that does not include a metal atom therein. Methods for synthesizing the zeolite UTD-1 may comprise: combining at least a silicon atom source and a directing agent having a structure of

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in an aqueous medium; forming the zeolite in the aqueous medium under hydrothermal synthesis conditions, such that the zeolite has a framework silicate with a cationic portion of the directing agent occluded within pores or channels of the framework silicate; and isolating the zeolite from the aqueous medium. The zeolite has a powder x-ray diffraction pattern with at least the following 2scattering angles: 6.00.12, 7.60.1, 14.660.15, 19.70.15, 21.270.15, 22.130.15, 22.610.15, and 24.420.10 for a borosilicate form zeolite, or 6.00.12, 7.60.15, 14.550.15, 19.640.15, 21.010.20, 21.900.20, 22.340.20, and 24.38 0.20 for an aluminosilicate form zeolite.