20 results about "Tetralin" patented technology

A polypropylene based composition comprising: A) from 40 wt% to 85 wt% of a first heterophasic propylene ethylene copolymer (HECO1) B) from 15 wt% to 60 wt%; of a second heterophasic propylene ethylene copolymer (HECO2) having: i) fraction soluble in xylene at 25°C ranging from 20.0 wt% to 38.0 wt%; ii) the melt flow rate (230°C / 5 kg.. ISO 1133) ranging from 0.2 g / 10min to 4.0 g / 10min; iii) intrinsic viscosity, measured in tetralin, of the fraction soluble in xylene at 25°C ranging from 5.7 dl / g to 9.2 dl / g.

A polyolefin composition comprising: A) from 85 wt% to 99.0 wt%;of a propylene homopolymer B) from 1.0 wt% to 15.0 wt%; of a propylene, ethylene copolymer composition having: iii) intrinsic viscosity, measured in tetralin, of the fraction soluble in xylene at 25°C ranging from 5.7 dl / g to 9.2 dl / g; propylene, ethylene copolymer composition component B) comprises: b1) from 27 wt% to 40 wt%; of a propylene homopolymer having a melt flow rate MFR1 (230°C / 2.16 kg. ISO 1133) ranging from 62.0 g / 10min to 100.0 g / 10min; b2) from 27 wt% to 40 wt% of a propylene homopolymer having a melt flow rate MFR2 (230°C / 2.16 kg. ISO 1133) lower than MFR1; b3) from 20 wt% to 46 wt% of a propylene ethylene copolymer having a content of ethylene derived units ranging from 18.0 wt% to 48.0 wt%.

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.

The application discloses an optimization method for calibrating wall-attached oil film by refractive index matching method, and belongs to the technical field of diesel engines. In the application, the order of magnitude of the wall-attached oil film thickness is micron, the calibration solution consistent with the refractive index of the test fuel is obtained by matching dodecane and tetrahydro naphthalene calibration solution, and the calibration precision is improved. In view of the non-uniformity of the oil film thickness during the calibration of the wall-attached oil film, the application judges the relationship between the gray value uniformity of the image and the preset uniformity threshold value, and removes the test working condition points with non-uniform thickness, so that the success rate of the calibration test is increased, and the calibration precision is improved. In view of the problem that the heavy components in the calibration solution evaporate in advance, the application compares the error between the test volume of the heavy components in the calibration solution and the known volume, removes the test working condition points affecting the precision, and improves the calibration precision. The application measures the oil film thickness of the oil spray impinging on the wall surface of the piston in the engine by the expression of the change relationship between the wall-attached oil film thickness and the scattered light intensity.

The application discloses a kind of zero addition main focus coal primary metallurgical coke and its preparation method, it is related to coal processing technical field.Primary metallurgical coke includes hydrogen donor and compound coal, compound coal is composed of 20wt%-50wt% lean coal and the rest coking coal, hydrogen donor includes the following weight parts components: 40 parts-60 parts tetrahydro naphthalene;20 parts-30 parts hydrogenated anthracene oil;2 parts-10 parts B 10 C3.By adding hydrogen donor, a large amount of free hydrogen can be provided in the plastic stage of high-volatility coking coal. The free radical fragments formed in the plastic stage of coking coal can still be stabilized in a large amount at the temperature of a large amount of pyrolysis and decomposition of lean coal, so that the plastic stage can be maintained for a long time, and finally the hot and cold strength of coke is significantly improved, so that it reaches the national first-class metallurgical coke standard. Moreover, the resource advantage of high-volatility coking coal can be fully utilized to promote the sustainable development of high-efficiency and low-cost coking industry.

The invention discloses synthesis of a tetrahydronaphthalene derivative and an intermediate thereof. The invention provides a synthesis method of a compound I. The synthesis method comprises the following step: in a solvent, in the presence of acid and a palladium catalyst, and in the presence of a reducing agent, carrying out hydroxyl reduction reaction on a compound IV to prepare the compound I. The preparation method has one or more of the following advantages: (1) good reaction selectivity, (2) mild and easy-to-control reaction, (3) high reaction yield, (4) good product purity, and (5) easily available materials, simple and convenient reaction operation, and good application prospect and value.

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.

A polypropylene composition (percentages being referred to the total A+B) comprising: A) from 80 to 94wt%, preferably from 82 to 92wt%, more preferably from 83 to 91wt% of polypropylene comprising more than 85wt% of propylene unit, and B) from 6 to 20wt%, preferably from 8 to 18%, more preferably from 9 to 17wt% of a copolymer of propylene and ethylene containing an average content of ethylene derived units from 20 to 50wt%, preferably from 25 to 45wt% and more preferably from 28 to 40wt%; said polypropylene composition being characterized by a fraction soluble in xylene at 25°C having an intrinsic viscosity in tetralin at 135°C of at least 80 dl / g.

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

The present application relates to a catalyst for preparing beta-phenethyl alcohol by hydrogenation of styrene, in particular to a preparation method and application of a catalyst for preparing beta-phenethyl alcohol by hydrogenation of epoxyphenyl ethane, comprising the following steps: preparing a solution of nickel acetate, ammonium molybdate, ZrOCl2.8H2O and niobium oxalate; adding a titanium-aluminum oxide carrier into the solution, stirring, and impregnating; adding potassium hydroxide to generate a precipitate, washing with deionized water, drying, and calcining to obtain the catalyst product; the titanium-aluminum oxide carrier is prepared by stirring tetrabutyl titanate, triethylamine, mesoporous aluminum oxide and low-carbon alcohol, suction filtering, air-drying at room temperature, and calcining in an air atmosphere; the application of the catalyst mixes epoxyphenyl ethane, solvent, hydrogen and hydrogen dissolving agent through a fixed bed reactor containing the catalyst, adjusts the reaction conditions of the fixed bed reactor, makes the epoxyphenyl ethane completely react, generates beta-phenethyl alcohol, has high reaction conversion rate, good reaction selectivity, low energy consumption, and saves device investment.

The present invention relates to a process for preparing a compound of formula (I), a stereoisomer, a salt, a hydrate or a solvate thereof, (II) comprising the sulfinulation step of a compound of formula (IV) to produce a compound of Formula (II); (IV) wherein: R1 and R2 are as defined in the claims, wherein said sulfinilation step is carried out in the presence of a solvent selected from the group comprising benzene, toluene, ethylbenzene, xylene, chlorobenzene, bromobenzene, fluorobenzene, anisole, nitrobenzene, tetralin, dichlorobenzene, trimethylbenzene, ethyl acetate, propyl acetate, butyl acetate, propanol, butanol, 2-methyltetrahydrofuran, diethyl ether, methyl tert-butyl ether, cyclopentyl methyl ether, dichloromethane, tetrachloromethane, pentane, hexane, heptane, cyclohexane, decalin and mixtures thereof.

The application belongs to the technical field of bio-chemical industry, and particularly discloses a method for synthesizing (S)-1-tetralinamine by in-vitro multi-enzyme cascade catalysis of tetralin. The multi-enzyme cascade system is composed of non-specific peroxidase, galactose oxidase and ω-transaminase, the substrate is tetralin, and the product is (S)-1-tetralinamine. First, the non-specific peroxidase is used to catalyze tetralin and hydrogen peroxide to generate tetralin alcohol, the tetralin alcohol is subjected to the action of the galactose oxidase to generate tetralin ketone, and the tetralin ketone is subjected to the action of the ω-transaminase to generate (S)-1-tetralinamine. Compared with the prior art, the synthesis method provides a new in-vitro multi-enzyme catalysis way for synthesizing (S)-1-tetralinamine from tetralin without expensive cofactors, the process is safe and green, the production cost can be significantly reduced, a new green way is developed for converting large-volume aromatic hydrocarbons into high-value amine organic compounds, and the method has important industrial application value.

Embodiments of the present disclosure related carbon-based structural unit (CSU). The CSUs include a cured composition. The cured composition includes about 1% to about 80% pyrolysis char (PC), about 0.1% to about 35% coal deposits, extracts, and residual tar (CDER) materials, and about 0% to about 99% pitch material. The CDER material includes a tetralin insoluble (TI), a deposit (De), a distillation residue (DR), and a residue (Re). A method of making a composition includes extracting a coal extraction residue (CER) from coal; fabricating pyrolysis char (PC) and a coal deposits, extracts, and residual tar (CDER) material from the CER; sieving and milling the PC into milled PC; and mixing the pyrolysis char (PC) and the CDER material to form a composition..

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.

A polyolefin composition comprising: A) from 50 wt% to 80 wt% of a copolymer of propylene and ethylene wherein: the ethylene content is between 2.5 wt% and 6.5 wt%; b) from 20% to 50% by weight of a propylene ethylene copolymer containing from 40.0% to 65.0% by weight of ethylene derived units as measured by NMR; wherein the resulting polyolefin composition has: a melt flow rate (ISO 1133 (230 DEG C, 21.6 kg) in the range of from 0.1 g / 10 minutes to 3.0 g / 10 minutes; the range of xylene solubles at 25 DEG C is from 23 wt% to 43.0 wt%; the intrinsic viscosity of the fraction soluble in xylene at 25 DEG C, measured in tetralin at 135 DEG C, ranges from 7.7 dl / g to 15.0 dl / g; the intrinsic viscosity of the entire composition, measured in tetralin at 135 DEG C, ranges from 7.7 dl / g to 15.0 dl / g; the sum of A and B is 100.

A polyolefin composition comprising: A) from 67% to 94% by weight of a copolymer of propylene and ethylene wherein: i) the content of ethylene derived units measured by NMR is between 2.7% by weight and 5.3% by weight; b) from 6% to 33% by weight of a propylene ethylene copolymer containing from 18.2% to 36.4% by weight of ethylene derived units as measured by NMR; wherein the resulting polyolefin composition has: i) a content of ethylene derived units, measured by NMR, of between 5.4 wt% and 10.0 wt%; ii) the content of ethylene derived units in the fraction soluble in xylene at 25 DEG C, measured by NMR, is between 14.4 wt% and 31.1 wt%; iii) the melt flow rate (ISO 1133 (230 DEG C, 21.6 kg) ranges from 0.5 g / 10 minutes to 7.5 g / 10 minutes; iv) the range of xylene solubles at 25 DEG C is from 13.9 wt% to 30.0 wt%; v) the intrinsic viscosity of the fraction soluble in xylene at 25 DEG C, measured in tetrahydronaphthalene at 135 DEG C, ranges from 4.4 dl / g to 9.4 dl / g; vi) the intrinsic viscosity of the entire composition, measured in tetralin at 135 DEG C, ranges from 4.0 dl / g to 9.4 dl / g; the sum of A and B is 100.

The invention discloses synthesis of a tetrahydronaphthalene derivative and an intermediate thereof. The invention provides a synthesis method of a compound I. The synthesis method comprises the following step: in a solvent, in the presence of a reducing agent, carrying out a reduction reaction on a compound II to prepare the compound I. The preparation method has one or more of the following advantages: (1) good reaction selectivity, (2) mild and easy-to-control reaction, (3) high reaction yield, (4) good product purity, and (5) easily available materials, simple and convenient reaction operation, and good application prospect and value.