6 results about "Tetralin" patented technology

The application provides a system and method for photocatalytic production of tetrahydrocycloheptane based on reactive distillation, and relates to the technical field of catalytic chemistry. The system comprises a backpack reactive distillation device, a solvent recovery and product purification column, and multiple heat exchangers. The backpack reactive distillation device comprises a distillation column and N photo reactors connected with the distillation column. The raw material norbornadiene, the side sampling stream of the distillation column, and the circulating stream taken from the bottom of the solvent recovery and product purification column are respectively introduced into each photo reactor from three paths. The reflux stream of the distillation column and the outlet streams of the N photo reactors are introduced into the distillation column. The crude product taken from the bottom of the distillation column is introduced into the solvent recovery and product purification column, the solvent recovery and product purification column separates and purifies tetrahydrocycloheptane and recovers the solvent, and high-efficiency and high-purity preparation of tetrahydrocycloheptane is realized.

A polypropylene composition comprising: A) from 65.5% to 82.5% by weight of a propylene homopolymer; b) from 17.5% to 34.5% by weight of a propylene ethylene copolymer having an ethylene derived unit content ranging from 38.2% to 48.3% by weight; the polypropylene composition has: i) a xylene soluble fraction at 25 DEG C ranging from 18.0% to 32.3% by weight; ii) the ethylene derived unit content in the fraction soluble in xylene at 25 DEG C ranging from 34.6% to 42.0% by weight, measured by 13C NMR; iii) a melt flow rate MFR comprised between 12.0 g / 10 min and 38.0 g / 10 min, measured according to ISO 1133 at 230 DEG C and a load of 2.16 kg, iv) the fraction soluble in xylene at 25 DEG C, measured in tetralin at 135 DEG C, has an intrinsic viscosity ranging from 2.2 dl / g to 3.5 dl / g, the sum of the amount of A) and the amount of B) being 100% by weight.

A prepolymer catalyst component for olefin polymerization, characterized in that it comprises: (a) a solid catalyst component comprising Ti, Mg, and a halogen, and a bidentate electron donor compound (BE), wherein the amount of the bidentate electron donor compound is such that the (BE) / Ti molar ratio ranges from 0 to 0.3; and (b) an ethylene (co)polymer, wherein the amount of the ethylene (co)polymer ranges from 0.1 to no more than 30 g per g of the solid catalyst component, and wherein the intrinsic viscosity measured in tetrahydronaphthalene at 135 °C is at least 3.0 dL / g; the prepolymer catalyst component also exhibits a porosity of 0.1 to 1 cm² as measured by the mercury method. 3 Within the range of / g, the prepolymerized catalyst exhibits high morphological stability and produces a small amount of fine particles.

The present disclosures are directed to chlorinated tetralin compounds and pharmaceutical compositions.

The present disclosures are directed to chlorinated tetralin compounds and pharmaceutical compositions.

The present disclosure relates to a method for preparing tetrahydronaphthalene compounds and intermediates thereof. Specifically, the method of the present disclosure can convert S-configuration intermediates generated in the synthesis of tetrahydronaphthalene compounds into available intermediates or desired compounds, achieve high recovery efficiency, effectively improve the utilization rate of raw materials, and greatly reduce production costs.