177 results about "Cyclooctadiene" patented technology

Gasoline engines equipped with three-way catalysts emit less NOx, hydrocarbons and carbon monoxide when operated on fuels containing a bimetallic catalyst comprising rhodium acetylacetonate and a fuel-soluble platinum compound such as diphenyl cyclooctadiene platinum(II) or platinum acetyl acetonate. The total metals in the additive will be dosed at a concentration of less than about 2 ppm (milligrams of metal to liter of gasoline) based on the amount of gasoline burned in the engine. Preferred dosages will be from about 0.15 to about 1.5 ppm, with a ratio of platinum to rhodium of from about 3:1 to about 15:1.

The invention discloses a preparation method for a metal complex catalyst used for synthesis of acrylic acid. The method comprises the following steps: dissolving bis(1,5-cyclooctadiene)nickel [Ni(cod)2]; then adding ligand and organic acid, carrying out stirring at a temperature of -10 to 30 DEG C for 10 to 150 min, preferably, at a temperature of -5 to 20 DEG C for 20 to 120 min; and finally, carrying out filtering and drying so as to prepare the metal complex catalyst used for synthesis of acrylic acid. The catalyst prepared by using the method has the advantages of low reaction temperature, high yield of acrylic acid and the like when used in direct synthesis of acrylic acid from CO2 and ethene.

A catalysis system used by a method for synthesizing chiral cyclic amine through catalyzing asymmetric hydrogenation of quinolin-3-amine by iridium is a chiral diphosphine complex of iridium. A reaction is carried out under the following conditions: the temperature is 25-70DEG C; a solvent is a toluene/tetrahydrofuran mixed solvent (V/V=3:1); the pressure is 2-14atm; a ratio of a substrate to a catalyst is 25:1; and the catalyst is a (1,5-cyclooctadiene)iridium chloride dimer and chiral diphosphine ligand complex. A corresponding chiral cyclic amine derivative is prepared from quinolin-3-amine, and the enantiomeric excess value can reach 94%. The method has the advantages of simple and practical operation, easily available raw material, high enantioselectivity, good yield, and green, atom-economic and environmentally-friendly reaction.

The invention discloses a ruthenium complex catalyzer for acetylene hydrochlorinate and a preparation method and application thereof. The catalyzer is characterized in that active carbon serves as catalyst support, and is loaded with ruthenium chloride and an organic ligand; the molar ratio of the ruthenium chloride and organic ligand is 1:1-6, and ruthenium accounts for 0.1-5.0% of the total weight of the catalyzer; the organic ligand is one or more of triphenylphosphine, pyridine, 2,2'-dipyridyl, acetylacetone, chlorodiphenylphosphine, chlorobenzene, cyclopentadiene, 4-methyl isopropyl benzene and 1,5-cyclooctadiene. The ruthenium complex catalyzer for the acetylene hydrochlorinate and the preparation method and application thereof have the advantages that the preparation process is simple, the catalytic activity and stability of the catalyzer are greatly improved, the catalyzer is more environmentally friendly, and the economy is high.

The invention discloses a method for synthesizing a chiraltetrahydro naphthalenederivate through asymmetric hydrogenation on isoquinoline by means of an iridium catalyst. A catalysis system applied in the method is a chiral bi-phosphine complex of metal iridium. The reaction is carried out under the conditions that the temperature is 25-60 DEG C; the volume ratio of tetrahydrofuran to dichloromethane in a solvent, namely a mixed solvent of tetrahydrofuran and dichloromethane is 1:1; the pressure is 13-50 Mpa; the ratio of a substrate to a catalyst is 50:1; the catalyst is a coordination compound of a (1,5-cyclooctadiene) iridium chloridedipolymer and a chiral bi-phosphine ligand. The corresponding chiral 1-position or 3-position substituted tetrahydro naphthalenederivate through hydrogenation on isoquinoline, and the enantiomeric excess of the derivate can reach 96%. The method is simple and practical in operation, raw materials are easy to obtain, the enantioselectivity is high, the yield is high, the reaction has atom economy, and the environment is friendly.

Preparation of cyclododecatriene in a continuous or discontinuous process by trimerization of butadiene in the presence of a catalyst system and a solvent, the crude cyclododecatriene obtained being able to be isolated by means of distillation. The cyclooctadiene formed as by-product can likewise be isolated from the crude product.

The invention provides a method for synthesizing derivatives of chiral tetrahydroquinoline by catalyzing asymmetric hydrosilylation with iridium. In the method, a used catalytic system is a chiral duplex phosphorus complex generated in situ. The reaction can be performed under the following conditions: a room temperature; a tetrahydrofuran solvent; a chlorizated cyclooctadiene iridium metallic precursor; and a chiral duplex phosphorus ligand chiral ligand. The method for preparing the catalyst comprises the following steps of: stirring the metallic precursor of iridium and the chiral duplex phosphorus ligand in the tetrahydrofuran at room temperature, adding the simple substance of iodine, stirring the mixture, and finally adding quinoline substrates, triethyl silicon hydrogen and water. By the hydrosilylation of quinoline, the corresponding derivatives of chiral tetrahydroquinoline are obtained, and the enantiomeric excess of the derivatives reaches 93 percent. The method has the advantages of easy and practical operation, readily available raw materials, high antipodal selectivity, high yield, no use of dangerous articles such as hydrogen gas and the like, safety and reliability; in addition, the reaction is environment-friendly.

The invention relates to an alpha-diimine nickel metal organic compound and a preparation method thereof. The preparation method comprises the following steps: adding NiBr2 (DME) and alpha-diimine into a dichloromethane solution for reaction under the protection of an inert atmosphere, reducing an obtained product in a diethyl ether or n-hexane solution by using metallic sodium, and then reacting with 1,5-cyclooctadiene to obtain a mononuclear nickel metal organic compound of alpha-diimine. The preparation method provided by the invention is simple, is high in product yield and good in purity and can be used as an olefin polymerization catalyst.

The invention provides a mercury-free catalyst with high catalytic activity for synthesizing vinyl chloride. The mercury-free catalyst is prepared from the raw materials of platinum, stannic chloride, cuprous chloride, methyltrioxorhenium, (1,5-cyclooctadiene)palladium dichloride(II), dibutyltin dilaurate and a carrier. The invention further provides a preparation method of the mercury-free catalyst. The mercury-free catalyst prepared by the method has high catalytic activity, and every gram of the mercury-free catalyst can be applied to catalysis to produce 1,80 to 1.85kg of vinyl chloride; in the prior art, every gram of low-mercury catalyst can be applied to catalysis to produce 1.25kg of vinyl chloride; the mercury-free catalyst prepared by the method is applied to a vinyl chloride synthetic reaction; as proved by chromatographic analysis, the purity of the vinyl chloride in an obtained crude product is 97.0 to 97.3 percent by volume, the yield of the vinyl chloride is 98.0 to 98.2 percent, and the selectivity of the vinyl chloride is 99.98 to 100 percent.

The invention discloses polyaryletherketone containing a boric acid ester, azo polyaryletherketone and a preparation method thereof, and belongs to the technical field of preparation of a high polymer material. The method comprises the following steps: firstly, synthetizing bisphenol A polyaryletherketone, and carrying out catalytic boriding reaction under a 1,5-cyclooctadiene chloride iridium dipolymer by using the polyaryletherketone and boron pinacol ester; secondly, synthetizing a 4-iodine-4'-(N,N-dimethyl amine) azobenzene monomer; finally, reacting with the 4-iodine-4'-(N,N-dimethyl amine) azobenzene monomer under catalysis of tetrakispalladium by using a polyaryletherketone material containing the boric acid ester, so as to prepare the azo polyaryletherketone. By adopting the method, an azo monomer can be successfully led to the polyaryletherketone, but the performance of the polyaryletherketone is not affected, biphenyl structure azo polyaryletherketone with stable performance also can be generated, and the storage stability of the azo material can be improved. Therefore, the method is expected to be applied in the aspect of preparation of a novel azo polymer material.

A method is provided for forming iridium oxide (IrOx) nanotubes. The method comprises: providing a substrate; introducing a (methylcyclopentadienyl)(1,5-cyclooctadiene)iridium(I) precursor; introducing oxygen as a precursor reaction gas; establishing a final pressure in the range of 1 to 50 Torr; establishing a substrate, or chamber temperature in the range of 200 to 500 degrees C.; and using a metalorganic chemical vapor deposition (MOCVD) process, growing IrOx hollow nanotubes from the substrate surface. Typically, the (methylcyclopentadienyl)(1,5-cyclooctadiene)iridium(I) precursor is initially heated in an ampule to a first temperature in the range of 60 to 90 degrees C., and the first temperature is maintained in the transport line introducing the precursor. The precursor may be mixed with an inert carrier gas such as Ar, or the oxygen precursor reaction gas may be used as the carrier.

The invention relates to a method for preparing a nitrogen, phosphor and fluorine codoping carbon-based mixed capacitor material and belongs to a field of doping type porous carbon-based capacitor material technology. The preparation method is performed in an anhydrous and oxygen-free inert environment, a catalyst and 2, 2'-dipyridyl are added in N,N'-dimethylformamide, and 1,5-cyclooctadiene is added in the N,N'-dimethylformamide, and heating to dissolve is performed; nitrogen source and fluorine source are added in the solution, and after the heating reaction finished, reactants are taken out; concentrated hydrochloric acid is dropwise added in an obtained material, and a colloidal solution doped with flocculent precipitate is obtained; the material is filtered and cleaned to obtain a material containing N and F, the material containing N and F is transferred to a porcelain boat, and high temperature carbonization is performed on the material containing N and F at a temperature range of 500-1000 DEG C; and high temperature phosphorus doping is performed on the carbonized material containing N and F and a P source. According to the invention, the synthesis condition is mild, the experiment operation is simple, the specific capacitance of the material reaches up to 250Fg<-1>, and problems that the carbon-based supercapacitor has low energy density, and faradaic pseudocapacitance material has poor cycling stability are solved.

A method for synthesis of 3-piperidone derivatives through iridium catalytic hydrogenation is provided, wherein a used catalyst is a triphenylphosphine complex of iridium. A reaction can be carried out under the following conditions: the temperature is 40-60 DEG C; the solvent is 1,2-dichloroethane; the pressure is 20-50 atmospheric pressures; the ratio of a substrate to a catalyst is 100 to 1; and the catalyst is a complex of chloro(1,5-cyclooctadiene)iridium(I) dimer and triphenylphosphine. Hydrogenation of 3-hydroxypyridine benzyl bromide salt can obtain the 3-piperidone derivatives with excellent chemoselectivity, the highest yield can reach 97%, and the chemical selectivity of ketones and alcohols is greater than 20:1. The method has the advantages of simple and convenient operation, easily obtained raw materials, high chemoselectivity, and good yield, and provides an atom economic and environment-friendly route for synthesis of a series of 3-piperidone derivatives.

The invention discloses a preparation method of rhodium compounds. According to the method, bis(1.5-cyclooctadiene) rhodium(I) tetrafluoroborate compounds are synthesized in two steps, firstly, 1.5-cyclooctadiene rhodium chloride dimmers are synthesized with rhodium chloride trihydrate as raw materials; secondly, the bis(1.5-cyclooctadiene) rhodium(I) tetrafluoroborate compounds are synthesized with the 1.5-cyclooctadiene rhodium chloride dimmers as raw materials. The one-way total yield is 93% or above, operation is easy, industrial production can be achieved, and certain economic benefits are achieved.