21 results about "Imine ligands" patented technology

The invention provides an alpha-diimine ligand compound, an alpha-diimine nickel catalyst and a preparation method and application of the alpha-diimine ligand compound and the alpha-diimine nickel catalyst, and belongs to the technical field of organic synthesis. Wherein R1 is selected from hydrogen, methoxyl or tertiary butyl; r2 is selected from methyl, ethyl or isopropyl; and R3 is selected from hydrogen or methyl. The alpha-diimine nickel catalyst prepared by adopting the alpha-diimine ligand compound can catalyze olefin to carry out homopolymerization reaction or copolymerization reaction, so that not only is excellent catalytic performance shown, but also a polyolefin material obtained by catalyzing olefin monomer homopolymerization reaction has excellent elastic recovery performance; and the catalyst has certain application potential in olefin polymerization industry.

Provided in the present invention are an organic polymer carrier, an ethylene oligomerization catalyst system, and a preparation method therefor and the use thereof The organic polymer carrier is obtained by copolymerizing a monomer comprising divinyl benzene and a monomer containing a bidentate pyridine-imine ligand, wherein the monomer containing the bidentate pyridine-imine ligand has a structure as represented by formula I: formula I. In formula I, R1 and R2 are each independently selected from H, halogen, and C1-C7 alkyl and derivatives thereof; R3 is selected from H, halogen, C1-C7 alkyl and derivatives thereof, and C6-C10 aryl and derivatives thereof; R4 is selected from H, and C1-C4 alkyl and derivatives thereof; and x is 0-3. The catalyst system has good ethylene oligomerization activity and α-olefin selectivity and long service life.

Provided in this disclosure are titanium complexes that contain 1) a cyclopentadienyl ligand; 2) an adamantyl-phosphinimine ligand; and 3) at least one activatable ligand. The use of such a complex, in combination with an activator, as an olefin polymerization catalyst is demonstrated. The catalysts are effective for the copolymerization of ethylene with an alpha olefin (such as 1-butene, 1-hexene or 1-octene) and enable the production of high molecular weight copolymers (Mw greater than 25,000) at high productivity under solution polymerization conditions.

The invention provides an organic polymer carrier, an ethylene oligomerization catalyst system and a preparation method and application thereof. The organic polymer carrier is obtained by copolymerizing divinyl benzene and a monomer containing a polydentate pyridine imine ligand; wherein the monomer containing the polydentate pyridine imine ligand has a structure as shown in a formula I: # imgabs0 #, in the formula I, two R1 are the same or different and are independently selected from H, halogen, C1-C7 alkyl groups and derivatives thereof, and C6-C10 aryl groups and derivatives thereof; x is 0-3. The catalyst system has good ethylene oligomerization activity and alpha-olefin selectivity, and is long in service life.

The invention provides an organic polymer carrier, an ethylene oligomerization catalyst system and a preparation method and application thereof. The organic polymer carrier is obtained by copolymerizing divinyl benzene and a monomer containing a bidentate pyridine imine ligand; wherein the monomer containing the bidentate pyridine imine ligand has a structure as shown in a formula I: # imgabs0 #, in the formula I, R1 and R2 are respectively and independently selected from H, halogen, C1-C7 alkyl and derivatives thereof; r3 is selected from H, halogen, C1-C7 alkyl groups and derivatives thereof, and C6-C10 aryl groups and derivatives thereof; r4 is selected from H, C1-C4 alkyl and derivatives thereof; x is 0-3. The catalyst system has good ethylene oligomerization activity and alpha-olefin selectivity, and is long in service life.

The invention provides a turtle-shaped nickel complex as well as a preparation method and application thereof. The preparation method of the nickel complex comprises the following steps: 1) preparing a butanedione diimine ligand; and 2) under the protection of inert gas, reacting the butanedione diimine ligand obtained in the step 1) with (DME) NiBr2 in the presence of an organic solvent at room temperature for 24 hours to obtain the turtle-shaped nickel complex. The turtle-shaped nickel complex is activated with sesquethyl aluminum chloride (EASC) and shows high activity on ethylene polymerization, polyethylene with high linearity, high molecular weight and narrow molecular weight distribution can be obtained, the highest catalytic activity can reach 1.87 * 10 < 7 > g mol <-1 > h <-1 >, and the highest molecular weight of polyethylene can reach 8.73 * 10 < 5 > g mol <-1 >.

The present application relates to the technical field of nickel-based catalyst, and discloses a diimine ligand, a preparation method and application thereof, wherein the raw materials for preparing the diimine ligand contain acenaphthenequinone, a protective agent, substituted aniline and a catalyst, the protective agent is selected from one or more than two of ortho ester, amine, hydrazine and substituted hydrazine; and the molar ratio of the acenaphthenequinone, the protective agent, the substituted aniline and the catalyst is 1:(0.5-3):(1.6-2.4):(0.1-10). In the present application, a certain amount of protective agent is added to the reaction system, the acenaphthenequinone is reacted with the ortho ester or low-molecular-weight amine to generate ketal or imine, the ketal or imine is separated or not separated, and then reacted with the substituted aniline to generate the target product diimine ligand, no water is generated in the synthesis reaction of the diimine ligand, the balance can be effectively promoted to the forward reaction, and the reaction yield is improved.

The invention relates to the technical field of olefin polymerization, in particular to a vinyl polyethylene elastomer as well as a synthesis method and synthesis equipment thereof. According to the synthesis method provided by the invention, the EPOE can be synthesized in one step by taking ethylene as a raw material and adopting the nickel-based diimine ligand main catalyst and the composite cocatalyst. According to the synthesis method disclosed by the invention, the most cheap mixture of aluminum alkyl and the assistant is adopted as the composite promoter, so that the production cost is reduced, and based on the three-section cascade reaction, a competitive reaction of a borate assistant and aluminum alkyl assistant does not exist, the solid content of a reaction product can be increased, and the yield of the product is increased. The utilization efficiency of the catalyst and the conversion per pass of ethylene are increased, the product performance is not different from that of C4 / C8POE, and POE products in the market can be completely replaced. The synthesis method disclosed by the invention adopts the synthesis equipment disclosed by the invention for synthesis, the synthesis can be continuously and stably carried out, the phenomenon that gel and solid PE block a pipeline does not exist, and the synthesis method belongs to a continuous efficient catalysis process.

This invention discloses a chiral oxazoline-pyridine-imine cobalt compound, its synthesis method, and its applications. The synthesis method involves the condensation reaction of 2-cyano-6-acetylpyridine and an aniline derivative with p-toluenesulfonic acid to generate a pyridine-imine compound. This compound is then cyclized with different chiral amino alcohols in the presence of zinc trifluoromethanesulfonate to generate chiral oxazoline-pyridine-imine ligands. The reaction of these ligands with anhydrous cobalt chloride successfully prepared four chiral oxazoline-pyridine-imine cobalt compounds. The cobalt catalyst synthesized in this invention possesses different chiral groups, electronic effects, and steric hindrance, and can catalyze the polymerization of isoprene.

This description provides titanium complexes containing 1) a cyclopentadienyl ligand; 2) an adamantyl-phosphinimine ligand; and 3) at least one activatable ligand. The use of the complex, in combination with an activator, as an olefin polymerization catalyst is demonstrated. The catalysts are effective for the copolymerization of ethylene with an alpha olefin (such as 1-butene, 1-hexene, or 1-octene) and enable the production of high molecular weight copolymers (Mw greater than 25,000) with high productivity under solution polymerization conditions.

The present invention relates to a process for producing polyurethanes, comprising the application of a manganese-containing catalyst and an iron-containing catalyst, the catalyst comprising at least an imine ligand and defined by general formula (I). The catalyst comprises a salicylic aldehyde-based imine according to general formula (II) as the imine ligand. The present invention further relates to a polyol component comprising the catalyst according to the present invention, and to polyurethanes produced according to such a process.

The application provides an alpha-diaimine ligand, an alpha-diaimine nickel coordination compound, a preparation method and application, wherein the alpha-diaimine ligand has any one of structures of formula (1) to formula (3): wherein M1 and M2 are the same or different, and each is independently selected from any one of Li, Na and K; R1 and R2 are the same or different, and each is independently selected from any one of a methyl group, a methoxy group, a trifluoromethyl group, a nitro group and a tert-butyl group.

According to the invention, a series of novel hydroquinoline-imino ligands are directly synthesized through amine-aldehyde condensation between 1, 2, 3, 4-tetrahydroquinoline-8-formaldehyde and various anilines under the catalysis of p-TsOH. Next, the obtained ligand and MMe4 (M = Ti, Zr or Hf) obtained through in-situ synthesis are subjected to a one-pot reaction to obtain the hydrogenated quinoline-imino coordinated titanium zirconium hafnium catalyst, and the hydrogenated quinoline-imino coordinated titanium zirconium hafnium catalyst is high in yield and has great economic benefits. The application of the obtained hydrogenated quinoline-imino coordinated titanium zirconium hafnium catalyst in the synthesis of polyolefin elastomers finds that the molecular weight and alpha-olefin insertion rate of the obtained polymer can be effectively improved by changing substituent groups on the catalyst structure. The hydroquinoline-imino coordinated titanium-zirconium-hafnium catalyst disclosed by the invention has the advantages of simple synthesis, easily available raw materials and high product yield. In the presence of a cocatalyst, the catalyst shows excellent activity (3.32 * 10 < 8 > g (POE). Mol <-1 > (Hf). H <-1 >) and alpha-olefin selectivity (the insertion rate reaches 38.4 mol%), and a high-molecular-weight polyolefin elastomer (POE) (the polymer molecular weight Mw reaches 3020 kg.mol <-1 >) is prepared. In addition, the hydrogenated quinoline-imino coordinated titanium zirconium hafnium catalyst also shows excellent high temperature resistance (higher than 200 DEG C), is suitable for high-temperature solution polymerization, and can be used for preparing high-performance polyolefin elastomers. In addition, the hydrogenated quinoline-imino coordinated titanium zirconium hafnium catalyst disclosed by the invention still shows an excellent catalytic effect in ethylene homopolymerization. Therefore, the invention has originality, and provides a new direction for the development of the field of polyolefin materials.

The invention provides a method for preparing chiral sulfinic acid thioester through asymmetric oxidation, which is characterized in that a disulfide compound is used as a raw material, a chiral aminoindanol-derived alloxan compound is used as a chiral catalyst, hydrogen peroxide or oxygen is used as an oxidant, and the chiral sulfinic acid thioester is prepared through asymmetric oxidation. Compared with a traditional chiral imine ligand matched with a vanadyl acetylacetonate catalyst, an aminoindanol-derived alloxan compound is used as a chiral small-molecule catalyst, so that the chiral small-molecule catalyst has higher catalytic stability and high optical purity of a product, is not influenced by factors such as the stirring speed, the shape and size of a reaction bottle and the like, and is convenient for engineering amplification; meanwhile, compared with a chiral resolution method, the method for synthesizing the chiral sulfinic acid thioester in one step by using a chiral small molecule catalysis method has higher step economy, and the method is simple to operate, high in raw material conversion rate, good in reaction enantioselectivity, high in product yield and high in optical purity.

The invention belongs to the field of sewage treatment, and particularly relates to an acrylonitrile production wastewater treatment process. Comprising the following steps: preparing a nickel catalyst by using a salicylaldehyde imine ligand and nickel salt; then loading a nickel catalyst on the magnetic carrier to obtain a magnetic catalyst; removing dissolved oxygen in the wastewater, treating the wastewater by adopting a magnetic catalyst, and promoting monomer polymerization in the wastewater; and the magnetic catalyst is separated in a magnetic suction separation manner. The process disclosed by the invention can promote olefin polymerization and sedimentation and reduce the activity and toxicity of the wastewater, is simple to operate and does not need special equipment.

The invention belongs to the technical field of catalysis, and particularly relates to a sandwich-type alpha-diimine ligand, a preparation method thereof, a nickel catalyst and a preparation method and application thereof. The sandwich-type alpha-diimine ligand provided by the invention has a structure shown as a formula (I), and in the formula (I), R1 is perfluoro-n-butyl or n-butyl, and R2 is hydrogen or tert-butyl. The nickel catalyst prepared from the ligand disclosed by the invention can present two different configurations in ethylene polymerization to realize double active centers, so that wide-distribution bimodal polyethylene can be produced in a single reactor. Formula (I).

Provided in this disclosure are zirconium and hafnium complexes that contain 1) a cyclopentadienyl ligand; 2) an adamantyl-phosphinimine ligand; and 3) at least one other ligand. The use of such a complex, in combination with an activator, as an olefin polymerization catalyst is demonstrated. The catalysts are effective for the copolymerization of ethylene with an alpha olefin (such as 1-butene, 1-hexene, or 1-octene).

The application belongs to the technical field of olefin polymerization catalysts, and provides a phenylthiol imine group IV metal complex, a preparation method and application, which is a complex of a thiol imine ligand and a group IV metal. n BuLi, elemental S and a group IV metal halide MX4 are reacted with each other to obtain the phenylthiol imine group IV metal complex. The phenylthiol imine group IV metal complex is simple to synthesize, can be used to catalyze ethylene homopolymerization at high activity to obtain low to high molecular weight polyethylene, and can be used to catalyze ethylene and alpha-olefin polymerization at high activity to obtain high-performance polyolefin products.

The invention discloses a pyridine imine ligand Schiff base corrosion inhibitor as well as a preparation method and application thereof in metal protection, and belongs to the technical field of cutting corrosion protection. The corrosion inhibitor contains hydroxyl, benzene rings and lone pair electrons. The chemical formula of the pyridine imine ligand Schiff base is C9H12N2O2. The invention further discloses a preparation method of the pyridine imine ligand Schiff base. The pyridine imine ligand Schiff base corrosion inhibitor has two hydroxyl groups, so that the water solubility and hydrophilicity of the Schiff base corrosion inhibitor are improved, the compound can be better adsorbed on the surface of a metal material through contained heteroatoms such as N and O and benzene rings, and the corrosion inhibition performance is improved. The corrosion inhibitor has excellent corrosion inhibition performance and stability, and is applied to corrosion protection of metal materials in corrosive liquid containing sodium chloride.

The present disclosure provides a polynuclear diimine ligand compound, a polynuclear diimine catalyst and a preparation method and application thereof, and belongs to the technical field of polyolefins. The polynuclear diimine ligand compound has a structure as shown in formula (I), wherein R1 and R2 are each independently selected from hydrogen, methyl, ethyl, C3-C8 isomerized alkyl, benzhydryl, methoxy, 4-tert-butylphenyl and biphenyl; and R3 is selected from hydrogen, methyl, ethyl, methoxy, C3-C8 isomerized alkyl, halogen and nitro. Formula (I).

The invention provides a preparation method of an enantiomer-enriched amino alcohol compound, which comprises the following steps: by taking 2-nitropropane and fatty aldehyde as raw materials, carrying out Henry reaction under the action of a catalytic system to obtain an enantiomer-enriched nitro alcohol compound; and reducing to obtain the enantiomer-enriched amino alcohol compound. A catalytic system composed of an efficient chiral imine ligand and a metal catalyst is adopted to catalyze 2-nitropropane and fatty aldehyde to be subjected to asymmetric Henry reaction, and a nitro alcohol intermediate is constructed with high enantioselectivity; and reducing nitryl through catalytic hydrogenation to obtain amino alcohol products with high enantiomer enrichment. Reaction conditions are mild, operation is simple, raw materials are easy to obtain, yield is high, and the method is suitable for large-scale production; a green solvent is used in the reaction process, byproducts are few, and the method is environment-friendly and conforms to the green chemistry principle. The whole process route is simple and efficient, and a feasible new way is provided for industrial preparation of enantiomer-enriched amino alcohol compounds.