Provided are a molecular sieve catalyst, a preparation method therefor, an application thereof. The molecular sieve catalyst contains a modified Na-MOR molecular sieve, and the modification comprises: organic ammonium salt exchange, dealumination treatment, and ammonium ion exchange. The catalyst obtained by the method is used in dimethyl ether for one-step production of methyl acetate. The catalyst has high activity and stable performance, and the needs of industrial production can be satisfied.

A production method for an organic solvent that contains less metal impurities which when manufacturing a semiconductor device. This production method passes a liquid through a filter cartridge, wherein the filter cartridge is obtained by layering types of base cloths for filtration, wherein the base cloths for filtration are nonwoven fabric obtained by chemically bonding a metal adsorption group to polyolefin fibers, the base cloths for filtration include nonwoven fabric layer A and nonwoven fabric layer B, the nonwoven fabric layer A includes polyolefin fibers to which a sulfonate group is chemically bonded as a metal adsorption group, the nonwoven fabric layer B includes polyolefin fibers bonded thereto as a metal adsorption group at least one selected from the group consisting of an amino group, an N-methyl-D-glucamine group, an iminodiacetate group, an iminodiethanol group, an amidoxime group, a phosphate group, a carboxylate group, and an ethylene diamine triacetate group.

A production method for an organic solvent that contains less metal impurities which when manufacturing a semiconductor device. This production method passes a liquid through a filter cartridge, wherein the filter cartridge is obtained by layering types of base cloths for filtration, wherein the base cloths for filtration are nonwoven fabric obtained by chemically bonding a metal adsorption group to polyolefin fibers, the base cloths for filtration include nonwoven fabric layer A and nonwoven fabric layer B, the nonwoven fabric layer A includes polyolefin fibers to which a sulfonate group is chemically bonded as a metal adsorption group, the nonwoven fabric layer B includes polyolefin fibers bonded thereto as a metal adsorption group at least one selected from the group consisting of an amino group, an N-methyl-D-glucamine group, an iminodiacetate group, an iminodiethanol group, an amidoxime group, a phosphate group, a carboxylate group, and an ethylene diamine triacetate group.

The present invention relates to the compound 2-ethyl-5,5-dimethyl-cyclohexanol, which can impart, modify and/or enhance one or more odours selected from the group consisting of minty, fresh tobacco leaf, cresol, horse and animalistic, mixtures comprising 2-ethyl-5,5-dimethyl-cyclohexanol, and a new method for producing the same, a fragrance composition comprising 2-ethyl-5,5-dimethyl-cyclohexanol, the use of 2-ethyl-5,5-dimethyl-cyclohexanol as a fragrance, particularly for imparting, modifying and/or enhancing one or more odours selected from the group consisting of minty, fresh tobacco leaf, cresol, horse and animalistic, a perfumed product comprising 2-ethyl-5,5-dimethyl-cyclohexanol, a method for perfuming such a product and a method for modifying an olfactory impression.

The invention relates to novel crystalline phases of 5,6-dichloro-2-(isopropylamino)-1-(β-L-ribofuranosyl)-1H-benzimidazole (Maribavir), pharmaceutical compositions thereof and their use in medical therapy.

The invention relates to novel crystalline phases of 5,6-dichloro-2-(isopropylamino)-1-(β-L-ribofuranosyl)-1H-benzimidazole (Maribavir), pharmaceutical compositions thereof and their use in medical therapy.

The present disclosure is directed to methods of producing zincoaluminosilicate structures with AEI, CHA, and GME topologies using organic structure directing agents (OSDAs), and the compositions and structures resulting from these methods.

The present disclosure is directed to methods of producing zincoaluminosilicate structures with AEI, CHA, and GME topologies using organic structure directing agents (OSDAs), and the compositions and structures resulting from these methods.

A catalyst for the carbonylation of dimethyl ether to methyl acetate. The catalyst comprises a zeolite, such as a mordenite zeolite, at least one Group IB metal, such as copper, and/or at least one Group VIII metal, such as iron, and at least one Group IIB metal, such as zinc. Such a catalyst with combined metals provides enhanced catalytic activity, improved stability, and improved selectivity to methyl acetate, and does not require a halogen promoter, as compared to a metal-free or copper only zeolite.

A catalyst for the carbonylation of dimethyl ether to methyl acetate. The catalyst comprises a zeolite, such as a mordenite zeolite, at least one Group IB metal, such as copper, and/or at least one Group VIII metal, such as iron, and at least one Group IIB metal, such as zinc. Such a catalyst with combined metals provides enhanced catalytic activity, improved stability, and improved selectivity to methyl acetate, and does not require a halogen promoter, as compared to a metal-free or copper only zeolite.