Abstract: A SCM-34 molecular sieve, preparation method therefor and use thereof are provided. The SCM-34 molecular sieve contains aluminum, phosphorus, oxygen and optionally silicon. In the XRD diffraction data of the molecular sieve, a 2? degree of the strongest peak within the range of 5-50° is 7.59±0.2. The SCM-34 molecular sieve has a new skeleton structure and can be used to prepare a metal-containing AFI type molecular sieve or an SAPO-17 molecular sieve.

Abstract: A SCM-38 molecular sieve and preparation process and use thereof are provided. The SCM-38 molecular sieve is a phosphorus-aluminium or silicon-phosphorus-aluminium molecular sieve, which has the following diffraction peak feature in its XRD spectrum: X-ray diffraction peaks appear at 2? of 7.20±0.1, 10.81±0.1, 11.60±0.1, 14.32±0.1, 21.39±0.1, 21.83±0.1, 27.31±0.1, 28.72±0.1. The most intense peak appears at 2? of 7.20±0.1.

Abstract: A silicon-aluminum zeolite SCM-36, a manufacturing method therefor and an application thereof are provided. The zeolite has a silicon/aluminum ratio n?5, and has a distinctive XRD diffraction spectrum. The SCM-36 zeolite can be used as an adsorbent, a catalyst, or a catalyst carrier.

Abstract: A biphasic solvent system for converting biomass to prepare 2,5-hexanedione and a one-pot process for catalytically converting biomass to prepare 2,5-hexanedione with said biphasic solvent system are provided. The process includes the steps of contacting and reacting a biomass raw material with a hydrogenation catalyst using hydrogen gas as a hydrogen source in a heterogeneous system formed from an organic solvent, an inorganic salt and water to obtain 2,5-hexanedione. The hydrogenation catalyst includes a hydrogenation active component and a support. The support is selected from one or more of hydrophobic active carbon and graphene. The process can achieve efficient conversion of biomass without the participation of acid catalysts, and have a very high selectivity for the product 2,5-hexanedione.

Abstract: A method for preparing paraxylene by biomass conversion includes the following steps: (1) contacting a biomass starting material with a hydrogenation catalyst for reaction in a multiphase system formed by an organic solvent, an inorganic salt and water, in the presence of hydrogen as a hydrogen source, and separating the resulting product to obtain an organic phase comprising 2,5-hexanedione; and (2) contacting the organic phase comprising 2,5-hexanedione obtained in the step (1) and ethylene with a molecular sieve catalyst for reaction to obtain paraxylene. The molecular sieve catalyst is at least one selected from the group consisting of aluminophosphate molecular sieves and SCM-14 molecular sieves.

Abstract: A silicon-and germanium-based molecular sieve has a framework chemical composition as represented by the formula “SiO2.1/nGeO2”. The silicon/germanium molar ratio is 0.1n30. The molecular sieve has a unique X-ray diffraction pattern. It can be used in adsorptive separation, ion exchange, and catalytic conversion of organic compounds.

Abstract: An aluminophosphate molecular sieve SCM-18 has a schematic chemical composition, expressed on a molar basis, of Al2O3.n P2O5, in which n represents a phosphorus to aluminum molar ratio, and is in a range of about 0.8-1.2. The aluminophosphate molecular sieve has a unique X-ray diffraction pattern, and can be used as an adsorbent, a catalyst or a catalyst carrier.

Abstract: A SCM-34 molecular sieve, preparation method therefor and use thereof are provided. The SCM-34 molecular sieve contains aluminum, phosphorus, oxygen and optionally silicon. In the XRD diffraction data of the molecular sieve, a 2? degree of the strongest peak within the range of 5-50° is 7.59±0.2. The SCM-34 molecular sieve has a new skeleton structure and can be used to prepare a metal-containing AFI type molecular sieve or an SAPO-17 molecular sieve.

Abstract: A novel silicoaluminophosphate molecular sieve has a schematic chemical composition, expressed on a molar basis, of mSiO2·Al2O3·nP2O5, in which m represents the molar ratio of SiO2 to Al2O3 and is in a range of about 0.005-0.15, and n represents the molar ratio of P2O5 to Al2O3 and is in a range of about 0.7-1.1. The silicoaluminophosphate molecular sieve has a unique X-ray diffraction pattern, and can be used as an adsorbent, a catalyst or a catalyst carrier.

Abstract: A SCM-33 molecular sieve has a schematic chemical composition as shown in the formula “SiO2·1/x XO1.5·m MO0.5”, wherein X is a framework trivalent element, the Si/X molar ratio x is ?5, M is a framework equilibrium cation, and the M/Si molar ratio is 0 <m?1. The molecular sieve is a novel molecular sieve with RTE topology and the molecular sieve requires short preparation time, involves a low synthesis cost and can be used as adsorbent or catalyst.

Abstract: A silicon- and germanium-based molecular sieve has a framework chemical composition as represented by the formula “SiO2.1/nGeO2”. The silicon/germanium molar ratio is 0.1n30. The molecular sieve has a unique X-ray diffraction pattern. It can be used in adsorptive separation, ion exchange, and catalytic conversion of organic compounds.

Abstract: An aluminophosphate molecular sieve SCM-18 has a schematic chemical composition, expressed on a molar basis, of Al2O3.n P2O5, in which wherein n represents a phosphorus to aluminum molar ratio, and is in a range of about 0.8-1.2. The aluminophosphate molecular sieve has a unique X-ray diffraction pattern, and can be used as an adsorbent, a catalyst or a catalyst carrier.

Abstract: A novel silicoaluminophosphate molecular sieve has a schematic chemical composition, expressed on a molar basis, of mSiO2.Al2O3.nP2O5, in which m represents the molar ratio of SiO2 to Al2O3 and is in a range of about 0.005-0.15, and n represents the molar ratio of P2O5 to Al2O3 and is in a range of about 0.7-1.1. The silicoaluminophosphate molecular sieve has a unique X-ray diffraction pattern, and can be used as an adsorbent, a catalyst or a catalyst carrier.