35results about How to "Heterogeneous catalysis" patented technology

The invention discloses an organic ligand and a Pd / Pb-based bi-metal organic framework as well as a synthetic method and application of the organic ligand and the Pd / Pb metal organic framework. A structural formula of the Pd / Pb-based bi-metal organic framework (Pd / Pb-MOF) is [Pb4(C42H28N8O8Pd)(C2O4)Br4]n, wherein n is a nonzero natural number. The Pd / Pb-based bi-metal organic framework (Pd / Pb-MOF) is used as a catalyst to be applied to catalyzing benzyne homocoupling and catalyzing three-component coupling reaction of benzyne, boracic acid and allyl halohydrocarbon. The MOF catalyst with active sites can be used for replacing some heavy metals to achieve a catalytic effect, so that the harm of the heavy metals to the environment is reduced. The MOF catalyst with the active sites is used for catalysis, so that heterocatalysis is realized; additionally, the bi-metal organic framework catalyst can be recycled for more than four times, and the catalyst is easy to recycle, so that the utilization rate of the catalyst is increased, and the cost is reduced.

The invention discloses an organic ligand L for synthesizing a Co (II) based metal organic framework, a Co (II) based metal organic framework Co-MOF-1 and a Co (II) based metal organic framework Co-MOF-2. The metal organic framework Co-MOF-1 is synthesized by virtue of the ligand L at first, and then crystals of the Co-MOF-1 are placed in the air for 24 hours at room temperature and then are subjected to constant-temperature treatment for 2 hours at 70 DEG C to obtain a novel catalyst Co-MOF-2 with active spots. The catalyst can be used for effectively catalyzing cyclohexane oxidation reaction, and a heavy metal is not needed to serve as a catalyst for reaction, so that the harm of the heavy metal to the environment is reduced, the reaction temperature is mild, the reaction time is relatively short, the usage amount of the catalyst is small, other additives are avoided, and the catalyst can be repeatedly used for more than 5 times relative to a free heavy metal salt.

The invention discloses an organic ligand L for synthesizing a triphase catalyst UiO-67-IM and the triphase catalyst UiO-67-IM. The triphase catalyst UiO-67-IM has the structural formula of [Zr6O4(OH)4L6]n, wherein n is a nonzero natural number. A preparation method of the triphase catalyst UiO-67-IM comprises the steps that the organic ligand L, ZrCl4 and acetic acid are dissolved into DMF, heat preservation is conducted for 24 hours at 120 DEG C, the temperature is lowered to room temperature, and then the metal organic framework UiO-67-IM is obtained. The catalyst can effectively catalyze a benzyl chloride azidation reaction, heavy metal salt does not need to serve as the catalyst, heterogeneous catalysis is achieved, the catalyst can be repeatedly utilized 5 times or above and is easy to recycle, the utilization rate of the catalyst is increased, and the cost is reduced; meanwhile, the catalyst is mild in reaction temperature, short in reaction time, low in dosage, free of other additives and beneficial for industrialized application and popularization.

The invention provides supported polyoxometallate and a preparation method thereof. The preparation method comprises the following steps: dissolving polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer in an HCl water solution, adding a silicon source compound, and uniformly mixing to obtain a first mixed solution; adding H5PV2Mo10O40, and after reaction, collecting solids; and carrying out a backflow reaction on the solids in ethyl alcohol, filtering, and drying to obtain the supported polyoxometallate. The supported polyoxometallate and the preparation method thereof provided by the invention have the advantages that the good acid catalysis effect of the H5PV2Mo10O40 is utilized to hydrolyze a silicon source to form a silicon ball, and meanwhile, the corresponding reaction condition is controlled, so that the H5PV2Mo10O40 is uniformly coated with a silicon dioxide silicon ball skeleton in a forming process; the problems that the former polyacid supporting efficiency is low, and polyacid is likely to separate from the silicon ball after being repeatedly used are solved, and the supported polyoxometallate is stable and effective. The invention also provides application of the supported polyoxometallate to degradation of phenol in sewage.

The invention discloses a metal organic frame based on a pyridine oxide ligand, and a preparation method and application thereof. The structural formula of the metal organic frame Zn-MOF is (ZnLBr2)n, wherein L refers to the pyridine oxide ligand L with the structural formula shown as below, and n refers to a non-zero natural number. A preparation method of the pyridine oxide ligand L includes (1), preparing 3, 5-dihalogenated pyridine into 3, 5-dihalogenated pyridine-N-oxide; (2), subjecting the 3, 5-dihalogenated pyridine-N-oxide to Suzuki reaction to obtain the pyridine oxide ligand L. According to the preparation method of the metal organic frame based on the pyridine oxide ligand, ZnBr2 liquor is laid on pyridine oxide ligand L liquor, and standing is performed to obtain a colorless monocrystal, namely the metal organic frame Zn-MOF. When the metal organic frame serves as a catalyst, reaction temperature is mild, reaction time is short, activity is high, catalyst consumption is low, the catalyst is easy to recycle, catalyst utilization rate is increased, and cost is reduced.

The invention relates to a Ni (II)-based metal-organic framework and a synthesis method and application thereof and belongs to the field of catalyst preparation. The synthesis method comprises the following steps: firstly, synthesizing a metal-organic framework Ni-MOF-1 through an organic ligand L, and then heating Ni-MOF-1 crystals at 100 DEG C for 4-6 hours, so as to prepare Ni-MOF-2; and finally, immersing the Ni-MOF-2 into a gas-phase atmosphere of iodine for 24 hours, so as to obtain a novel iodine-loaded catalyst Ni-MOF-3. The benzaldehyde silicon cyanation can be effectively catalyzed by the catalyst without need of a solvent reaction; and therefore, the harm to the environment caused by a toxic solvent is reduced, the reaction temperature is mild, reaction time is short, the catalyst consumption is low, and no other additives are used; and compared with free iodine, the metal-organic framework can be reused for over five times.

The invention discloses a novel solid-state three-phase catalyst. The novel solid-state three-phase catalyst comprises organic ligands L for synthesizing metal organic frameworks based on Cd(II), metal organic frameworks Cd-MOF-1 based on Co(II) and metal organic frameworks Cd-MOF-1' based on Co(II). A method for preparing the novel solid-state three-phase catalyst includes synthesizing the metal organic frameworks Cd-MOF-1 by the aid of the organic ligands L; arranging the metal organic frameworks CD-MOF-1 and 1-dodecyl bromide in a double-opening flask with the volume of 25 ml, adding 10 ml of anhydrous acetonitrile into the double-opening flask and heating the metal organic frameworks CD-MOF-1, the 1-dodecyl bromide and the anhydrous acetonitrile until the temperatures of the metal organic frameworks CD-MOF-1, the 1-dodecyl bromide and the anhydrous acetonitrile reach 80-90 DEG C; carrying out stirring reaction on the metal organic frameworks CD-MOF-1, the 1-dodecyl bromide and the anhydrous acetonitrile for 48 h; stopping heating the metal organic frameworks CD-MOF-1, the 1-dodecyl bromide and the anhydrous acetonitrile; arranging reaction systems in room-temperature environments; centrifugally separating the reaction systems; collecting precipitates; washing the precipitates by the aid of acetonitrile twice; washing the precipitates by the aid of methanol twice; washing the precipitates by the aid of diethyl ether twice to obtain the novel solid-state three-phase catalyst Cd-MOF-1'. The anhydrous acetonitrile is used as a solvent. The novel solid-state three-phase catalyst has the advantages that azidation reaction on 1-bromobutane can be effectively catalyzed by the novel solid-state three-phase catalyst without reaction of the traditional phase transfer catalysts, the reaction temperature is mild, and the novel solid-state three-phase catalyst is short in reaction time, low in usage and free of other additives, is easy to recycle as compared with the traditional phase transfer catalysts and can be reused by more than three times.

The disclosure provides a porous organic composite loaded with palladium nanoparticles in situ, a synthesis method and an application. The porous organic composite comprises a porous organic polymer and palladium nanoparticles, and the palladium nanoparticles are loaded in situ on the porous organic polymer. The repeating unit of the porous organic polymer is represented by the following chemicalformula in the specification, wherein R is n-dodecyl. The porous organic composite perfectly combines a catalytic function of Pd NPs, ionic liquid properties of imidazolyl, and heterogeneous catalyticproperties based on a porous organic polymer, a multifunctional catalytic system is formed, and finally requirements of sustainable chemistry and green synthesis can be satisfied.

The invention belongs to the technical field of COF catalysts, and particularly relates to a (R)-TAPP-BINOL-COF polymer as well as a preparation method and applications thereof. The invention providesa preparation method and applications of covalent organic framework (R)-TAPP-BINOL-COF. The (R)-TAPP-BINOL-COF is crystallized in a C2 space group. The catalyst can effectively catalyze a synthetic reaction of a clopidogrel intermediate through photothermal conversion under illumination conditions, is mild in reaction conditions, short in reaction time and less in catalyst dosage, can be repeatedly used for more than five times, and has good economic significance when being applied to industrial production.

The disclosure provides an alpha-diimine nickel metal organic ligand, a porous organic polymer and application of the porous organic polymer. The porous organic polymer has a chemical structural formula as shown in the description. The porous organic polymer can be applied to preparation of a catalyst for catalyzing a Suzuki coupling reaction, and the catalyst has high catalytic activity, low cost, low usage amount and repeated use.

The invention belongs to the technical field of catalyst preparation and particularly relates to a chiral catalyst (S)-DTP-COF and a preparation method and application thereof. The preparation methodof the chiral catalyst (S)-DTP-COF comprises the steps of: putting cuprous triflate and (S,S)-2,6-bis(4-phenyl-2-oxazolyl-2-yl)pyridine into a round-bottom flask, taking chloroform as a solvent, and carrying out stirring and dissolving; adding 2,5-dimethoxyterephthalaldehyde, 1,3,5-tris(4-aminophenyl)benzene and phenylacetylene into the round-bottom flask and stirring at room temperature for 48 hours; and finally adding an acetic acid and carrying out stirring for 24-48 hours to obtain (S)-DTP-COF. The catalyst can effectively catalyze Michael addition reaction, high temperature is not needed,the amount of the catalyst is small, no other additives are used, and heterogeneous catalysis can be achieved. Meanwhile, the catalyst can be reused and easily recycled, so that the utilization rateof the catalyst is improved, the cost is reduced and industrial popularization and application are facilitated.

The invention belongs to the technical field of preparation of heterocyclic compounds, and specifically relates to a preparation method for amination synthesis of N-methylpiperidine from 1,5-pentanediol. The method comprises the following steps: with 1,5-pentanediol and monomethylamine as raw materials, carrying out an amination reaction in a tubular reactor filled with two upper-and-lower layersof a catalyst so as to obtain a crude product, and carrying out refining so as to obtain the N-methylpiperidine. The preparation method provided by the invention uses equipment with small size, is simple for industrial amplification, has relatively low cost and small technical investment, and can reach a product purity of 98.0% or above.

The invention relates to a three-component compound catalyst, as well as a preparation method and application thereof. The three-component compound catalyst is represented as NaYF4:Yb,Tm@Cd-MOF@TiO(2), and takes 4-amino-3,5-bis (4-pyridine-3-phenyl) -1,2,4-triazole as ligand. The catalyst is highly efficient, easy to obtain and feasible for recycled use; and thus, the catalyst is an excellent catalyst for photodegradation of dyes in water.

The invention discloses an organic ligand L for synthesizing a triphase catalyst UiO-67-IM and the triphase catalyst UiO-67-IM. The triphase catalyst UiO-67-IM has the structural formula of [Zr6O4(OH)4L6]n, wherein n is a nonzero natural number. A preparation method of the triphase catalyst UiO-67-IM comprises the steps that the organic ligand L, ZrCl4 and acetic acid are dissolved into DMF, heat preservation is conducted for 24 hours at 120 DEG C, the temperature is lowered to room temperature, and then the metal organic framework UiO-67-IM is obtained. The catalyst can effectively catalyze a benzyl chloride azidation reaction, heavy metal salt does not need to serve as the catalyst, heterogeneous catalysis is achieved, the catalyst can be repeatedly utilized 5 times or above and is easy to recycle, the utilization rate of the catalyst is increased, and the cost is reduced; meanwhile, the catalyst is mild in reaction temperature, short in reaction time, low in dosage, free of other additives and beneficial for industrialized application and popularization.

The invention provides a preparation method and an application of a tridentate isonitrile and metal-organic micro-porous framework material MOMFs. The g chemical structural formula of the MOMFs is shown in the description. The MOMFs can be used to obtain a catalyst for catalyzing a Suzuki coupling reaction, and the catalyst has the advantages of high catalytic activity, low cost, small use amountand reusability.

The invention relates to a Ni (II)-based metal-organic framework and a synthesis method and application thereof and belongs to the field of catalyst preparation. The synthesis method comprises the following steps: firstly, synthesizing a metal-organic framework Ni-MOF-1 through an organic ligand L, and then heating Ni-MOF-1 crystals at 100 DEG C for 4-6 hours, so as to prepare Ni-MOF-2; and finally, immersing the Ni-MOF-2 into a gas-phase atmosphere of iodine for 24 hours, so as to obtain a novel iodine-loaded catalyst Ni-MOF-3. The benzaldehyde silicon cyanation can be effectively catalyzed by the catalyst without need of a solvent reaction; and therefore, the harm to the environment caused by a toxic solvent is reduced, the reaction temperature is mild, reaction time is short, the catalyst consumption is low, and no other additives are used; and compared with free iodine, the metal-organic framework can be reused for over five times.

The invention relates to a preparation method and application of a chiral Zr-MOF catalyst, which belongs to the technical field of preparation of chiral catalysts. The structural formula of an organic ligand L of a chiral Zr-MOF catalyst is: (R)-4,4' ‑Dimethoxycarbonyl‑6,6'‑dichloro‑2,2'‑diethoxy‑1,1'‑binaphthyl reacted with sodium hydroxide to obtain organic ligand L. Organic Ligand L and ZrCl 4 Chiral Zr-MOF catalysts were prepared by solvothermal reaction. The step of the method for preparing α-nitrile alcohol by chiral Zr-MOF catalyst is to put benzaldehyde, TMSCN, Zr-MOF into the container, add solvent acetonitrile and stir, through centrifugation, decompression rotary evaporation concentration, column chromatography, acidification treatment , separation and drying to obtain α-nitrile alcohol. The chiral selectivity of the chiral α-nitrile alcohol obtained by catalyzing the reaction of benzaldehyde and cyanosilane with the chiral catalyst of the present invention is 97-99%.

The invention relates to the technical field of catalysts, in particular to a catalyst CuBr 2 @UiO‑66‑NH 2 ‑CF 3 COOH and its preparation method and application. The method comprises: 1) UiO-66-NH 2 placed in CF 3 Soak in the aqueous solution of COOH, separate the reaction liquid after completion, wash the obtained solid product, and obtain UiO‑66‑NH after drying 2 ‑CF 3 COOH; 2) UiO-66-NH of step 1) 2 ‑CF 3 COOH, soak in copper bromide solution, separate the reaction solution after completion, wash the obtained solid product, and obtain CuBr after drying 2 @UiO‑66‑NH 2 ‑CF 3 COOH. Catalyst CuBr of the present invention 2 @UiO‑66‑NH 2 ‑CF 3 COOH has a high utilization rate, mild reaction conditions, and is environmentally friendly, which can effectively reduce the cost of catalysis.

The invention discloses a novel solid-state three-phase catalyst. The novel solid-state three-phase catalyst comprises organic ligands L for synthesizing metal organic frameworks based on Cd(II), metal organic frameworks Cd-MOF-1 based on Co(II) and metal organic frameworks Cd-MOF-1' based on Co(II). A method for preparing the novel solid-state three-phase catalyst includes synthesizing the metal organic frameworks Cd-MOF-1 by the aid of the organic ligands L; arranging the metal organic frameworks CD-MOF-1 and 1-dodecyl bromide in a double-opening flask with the volume of 25 ml, adding 10 ml of anhydrous acetonitrile into the double-opening flask and heating the metal organic frameworks CD-MOF-1, the 1-dodecyl bromide and the anhydrous acetonitrile until the temperatures of the metal organic frameworks CD-MOF-1, the 1-dodecyl bromide and the anhydrous acetonitrile reach 80-90 DEG C; carrying out stirring reaction on the metal organic frameworks CD-MOF-1, the 1-dodecyl bromide and the anhydrous acetonitrile for 48 h; stopping heating the metal organic frameworks CD-MOF-1, the 1-dodecyl bromide and the anhydrous acetonitrile; arranging reaction systems in room-temperature environments; centrifugally separating the reaction systems; collecting precipitates; washing the precipitates by the aid of acetonitrile twice; washing the precipitates by the aid of methanol twice; washing the precipitates by the aid of diethyl ether twice to obtain the novel solid-state three-phase catalyst Cd-MOF-1'. The anhydrous acetonitrile is used as a solvent. The novel solid-state three-phase catalyst has the advantages that azidation reaction on 1-bromobutane can be effectively catalyzed by the novel solid-state three-phase catalyst without reaction of the traditional phase transfer catalysts, the reaction temperature is mild, and the novel solid-state three-phase catalyst is short in reaction time, low in usage and free of other additives, is easy to recycle as compared with the traditional phase transfer catalysts and can be reused by more than three times.

The present disclosure provides porous organic composites, synthesis methods and applications of in-situ loaded palladium nanoparticles. The porous organic composites include porous organic polymers and palladium nanoparticles, and the palladium nanoparticles are loaded on the porous organic polymers in situ. The repeating unit of the porous organic polymer has the following chemical structural formula: wherein, R is n-dodecyl. The porous organic composites provided by this disclosure perfectly combine the catalytic function of Pd NPs, the performance of imidazole-based ionic liquids, and the heterogeneous catalytic properties based on porous organic polymers to form a multifunctional catalytic system, which can finally meet the requirements of sustainable chemistry. and green synthesis requirements.

The invention relates to a metal organic complex of divalent zinc ions and a preparation method and application of the metal organic complex. An organic ligand L is prepared at first, and the structural formula is as shown in specification, the solution of the organic ligand L reacts with a zinc salt solution at room temperature to obtain a metal organic complex, and the metal organic complex hasa good catalytic effect in reaction of catalytic synthesis of diisopropylidene-D-mannitol as a catalyst.

The invention relates to a metal organic complex of divalent zinc ions and a preparation method and application of the metal organic complex. An organic ligand L is prepared at first, and the structural formula is as shown in specification, the solution of the organic ligand L reacts with a zinc salt solution at room temperature to obtain a metal organic complex, and the metal organic complex hasa good catalytic effect in reaction of catalytic synthesis of diisopropylidene-D-mannitol as a catalyst.

The invention belongs to the technical field of catalyst preparation, and in particular relates to a chiral catalyst, (S)-DTP-COF and its preparation method and application. Wherein, the preparation method of the chiral catalyst (S)-DTP-COF is: trifluoromethanesulfonate cuprous, (S,S)-2,6-bis(4-phenyl-2-oxazoline-2 - Base) pyridine is placed in a round-bottomed flask, with chloroform as a solvent, stirring and dissolving. Add 2,5-dimethoxybenzene-1,4-diformaldehyde, 1,3,5-tris(4-aminophenyl)benzene and phenylacetylene into a round bottom flask, and stir at room temperature for 48 hours. Finally, add acetic acid and stir for 24‑48h to obtain (S)‑DTP‑COF. The catalyst can effectively catalyze the Michael addition reaction, and can realize heterogeneous catalysis without high temperature, less catalyst consumption and no other additives. At the same time, the catalyst can be reused and recycled easily, which improves the utilization rate of the catalyst, reduces the cost, and is beneficial to industrial popularization and application.

The invention discloses an organic ligand L for synthesizing a Co(II)-based metal-organic framework, a Co(II)-based metal-organic framework Co-MOF-1, and a Co(II)-based metal-organic framework Co- MOF‑2. Firstly, the metal-organic framework Co‑MOF‑1 was synthesized by the organic ligand L, and then the crystal of Co‑MOF‑1 was placed in the air at room temperature for 24 hours, and then kept at 70°C for 2 hours to obtain a new type with active sites. Point Catalyst Co‑MOF‑2. The catalyst can effectively catalyze the oxidation reaction of cyclohexane, does not require heavy metals as catalysts, reduces the harm of heavy metals to the environment, has mild reaction temperature, short reaction time, less catalyst consumption, no other additives, and compared with free heavy metal salts , can be reused more than five times.

The invention belongs to the technical field of COF catalysts, and particularly relates to a (R)-CuTAPBP-COF polymer as well as a preparation method and application thereof. The polymer (R)-CuTAPBP-COF provided by the invention has a good photothermal conversion property; and as the (R)-CuTAPBP-COF is used as a catalyst, the reaction of propionaldehyde with 4-(bromomethyl)pyridine can be effectively catalyzed through photothermal conversion to obtain an angiogenesis inhibitor intermediate, namely (R)-2-methyl-3-(pyridin-4-yl)propionaldehyde, the yield and stereoselectivity of the catalytic reaction are very high, heterogeneous catalysis is realized, the catalyst can be repeatedly utilized five times or more, the catalyst is easy to recycle, the utilization rate of the catalyst is improved, and cost is reduced.

The invention discloses a composite catalyst Cu(0)@UiO-66-NH2. The preparation method of the composite catalyst consists of: firstly, synthesizing a metal organic framework UiO-66-NH2; then, soaking the UiO-66-NH2 material in a copper acetate ethanol solution for 1h at room temperature, then conducting ethanol washing and drying to obtain a Cu(II)@UiO-66-NH2 composite metal organic framework material; and finally, reducing the Cu(II)@UiO-66-NH2 composite metal organic framework material with an aqueous solution of sodium borohydride so as to obtain the composite catalyst Cu(0)@UiO-66-NH2. The catalyst can effectively catalyze styrene reduction reaction without reaction of a transition metal as the catalyst, realizes heterogeneous catalysis, also can be reused more than five times, and the catalyst can be easily recovered, thus improving the utilization rate of the catalyst and reducing the cost. At the same time, the composite catalyst provided by the invention has the advantages of mild reaction temperature, shorter reaction time, small catalyst dosage, and no other additive, and is beneficial to industrial popularization and application.

The invention discloses four metal organic frames based on Co (II) and a preparation method and application of the four metal organic frames. The prepared metal organic frames can be adopted as a lewis acid catalyst for catalyze a chemical reaction, a Knoevenagel condensation reaction is efficiently catalyzed, a weak base catalyst reaction is not needed, corrosion of reaction liquid to a reaction container is reduced, reaction temperature is moderate, reaction time is short, the amount of the adopted catalyst is small, no other additives are needed, and compared with homogeneous catalysis, the metal organic frames can be repeatedly utilized five times or above.

The invention discloses a preparation method and application of nano-Pd1.6Au1.0 alloy@Mn(II)MOF. The Mn(II)-MOF is crystallized in the triclinic system, belongs to the P-1 space group, and has a node The Mn(II) metal center is in a coordination environment of a deformed octahedron {MnN2O4}. The octahedral coordination plane is occupied by four O atoms from diketone and one N atom from pyridine in the axial direction. Mn(II)-MOF is soaked in PdCl2 and K2AuCl4 solutions and reduced with sodium borohydride to obtain a nano-Pd1.6Au1.0 alloy@Mn(II)-MOF catalyst. The catalyst can effectively catalyze the series reaction of benzyl alcohol and benzyl ammonia. The reaction temperature is mild, the reaction time is short, the catalyst dosage is small, there are no other additives, and it can be reused more than five times.