Abstract: A device for continuous production of polyferric chloride and a method are disclosed. The device includes a first mixing pipeline, a second reaction pipeline, a third reaction pipeline, and a concentration device sequentially connected. The first mixing pipeline, the second reaction pipeline and the third reaction pipeline are each provided with a circulating spray device, and the circulating spray device includes a reflux pump, a reflux pipeline and an atomizer. The atomizer includes an atomizing pipe, and a chemical filler plate for promoting gas-liquid contact is arranged below the atomizing pipe. The reflux pump is used to extract liquid from each reaction tank, and then transport the liquid to the atomizer on the top of the reaction tank. The atomizer is driven by the pressure of the reflux pump or the motor to atomize the liquid.

Abstract: A copper integrated electrode with a convertible oxidation state, a preparation method and an application method are provided. The preparation process is based on an electrochemically induced self-growth method. Copper foam is used as a precursor, soaked in a graphene oxide solution, dried, calcined at high temperature and annealed, and then treated with an alkali solution to obtain the copper integrated electrode with the convertible oxidation state. The working electrode prepared by the nano-catalytic material of the present invention has good denitrification performance in the environmental field, which can achieve nearly 100% nitrate removal rate, nearly 100% nitrogen selectivity and long-term stability. These properties are due to the prepared working electrode having an oxidizable copper (I, II/0, I), oxygen vacancy (O) and a one-dimensional nanowire structure.

Abstract: The present invention provides a metal-organic framework material for the adsorptive separation of acetylene/ethylene mixture and preparation method therefor. The metal-organic framework material is named TJE-2 with a chemical formula of [Ni(pyc)(apyz)]n, wherein, Ni represents nickel as a metal center, pyc represents the organic ligand 1H-pyrazole-4-carboxylic acid, and apyz represents the organic ligand 2-aminopyrazine. The preparation method is as follows: thoroughly dissolving pyc, apyz and Ni(NO3)2·6H2O, transferring the mixture to a pressure-resistant closed container for heating reaction, followed by solvent exchange and activation to obtain a homogeneous powder material. The ultra-microporous metal-organic framework material prepared by the present invention features a significantly high C2H2 adsorption capacity, good selectivity, and low raw material costs, and therefore can realize C2H2/C2H4 separation at lower costs.

Abstract: A corrosion inhibitor for a soft water circulation heating and cooling system, wherein the corrosion inhibitor is pentapentanol core hyperbranched macromolecule functionalized by isothiourea and carboxyl, which has a chemical formula of C5H7O5{COC(CH3)[CH2OCOCH2CH(COOH)SC(NH)NH2]2}5. The corrosion inhibitor provided by the present invention is non-phosphorus, biodegradable, non-toxic, low in cost and has good corrosion inhibition effect. Moreover, it has excellent corrosion inhibition performance for circulating heating and cooling systems using soft water as the water source, and can significantly improve the reuse rate of circulating water. The present invention also provides a preparation method of the corrosion inhibitor, which is simple, easy to obtain raw materials and easy to industrialize.

Abstract: Disclosed is a method for continuously producing polyaluminum chloride from aluminum slag, comprising: blending the aluminum slag with water into a slurry in a mixing tank; pumping the slurry and a sodium hydroxide solution into a first mixing reactor; introducing the mixture obtained in the first mixing reactor into a second mixing reactor and pumping hydrochloric acid into the second mixing reactor; and filtering the resulting mixture and allowing filtrate for ripening, polymerization and sedimentation to obtain liquid polyaluminum chloride; wherein each of the reactors is pipeline-shaped, arranged horizontally and provided with a spiral conveyor shaft inside which is arranged horizontally and configured to stir and convey the mixture in a pipeline. This method realizes a continuous treatment of aluminum slag together with a continuous recovery of ammonia nitrogen and produces PAC, thereby achieving resourceful utilization and improved operability.

Abstract: The present invention provides a method of preparing a graphene-wrapped cobalt Prussian blue nano-crystalline composite material, and a method of preparing a working electrode using the same and an application thereof. The preparation method of the composite material includes: dispersing a ligand solution containing cobalt and a graphene oxide solution in an aqueous solution fully by stirring and ultrasonication, next, adding a cobalt metal salt solution and fully stirring, and then calcining the mixture in an inert atmosphere after centrifugation and lyophilization to obtain the above composite material. The preparation method of the present invention is simple in operation, low in energy consumption and low in material costs and the like. The composite material is obtained by uniformly and closely wrapping cobalt Prussian blue nano-crystals in graphene with excellent conductivity, thereby significantly improving electron transfer efficiency and active site utilization rate of the composite material.

Abstract: A method for assembling and synthesizing Cu2O particle-supported porous CuBTC includes the following steps of: 1) dissolving polyvinylpyrrolidone (PVP) in ethanol solution to obtain a PVP-ethanol solution; 2) dissolving copper salt in distilled water, and mixing with trimesic acid, salicylic acid, and the PVP-ethanol solution obtained in step 1) under stirring; and 3) conducting a hydrothermal reaction on the mixed solution obtained in step 2) at 120° C. to obtain Cu2O particle-supported porous CuBTC. The new method introduces salicylic acid during the synthesis of CuBTC. The salicylic acid, as a ligand precursor, forms a porous CuBTC material through the unsaturated coordination of a ligand under the catalysis of Cu ion. The resulting porous CuBTC supported with ultrafine Cu2O nanoparticles can adsorb high-energy molecules and exhibit excellent crystallinity, porosity, and stability.

Abstract: A compound heavy metal chelating agent, which relates to the field of chemical and environmental protection technology, includes dithiocarboxylate functionalized ethoxylated pentaerythritol core hyperbranched polymer and alkylene diamine-N,N?-sodium bisdithiocarboxylate with a molar ratio in a range of 1:1.0 to 1:10.0. The two different structural types of components have the synergistic positive effect. While chelating heavy metals, the compound heavy metal chelating agent alternately combine with heavy metals to form insoluble chelating super-molecular deposits, which has both chelation and flocculation functions. The compound heavy metal chelating agent meets the standard for treating heavy metal wastewater, and low concentration heavy metal wastewater. It has a wide adaptability range, and does not need to add coagulant. Moreover, it is simple in preparation method, easily available for raw materials, low in cost, and easy to be industrialized.

Abstract: A copper integrated electrode with a convertible oxidation state, a preparation method and an application method are provided. The preparation process is based on an electrochemically induced self-growth method. Copper foam is used as a precursor, soaked in a graphene oxide solution, dried, calcined at high temperature and annealed, and then treated with an alkali solution to obtain the copper integrated electrode with the convertible oxidation state. The working electrode prepared by the nano-catalytic material of the present invention has good denitrification performance in the environmental field, which can achieve nearly 100% nitrate removal rate, nearly 100% nitrogen selectivity and long-term stability. These properties are due to the prepared working electrode having an oxidizable copper (I, II/0, I), oxygen vacancy (O) and a one-dimensional nanowire structure.

Abstract: An ethoxylated pentaerythritol core hyperbranched polymer with dithiocarboxylate as side group and terminal group and its applications as a heavy metal chelating agent are disclosed, which relates to the field of chemical and environmental protection technology. The hyperbranched polymer has a chemical formula of C[CH2OCH2CH2OCOCH2CH2N(CSSM)CH2CH2NHCSSM]4, wherein M is Na+, K+ or NH4+. A preparation method of the hyperbranched polymer is simple, the raw materials are easily available, and it is easy to be industrialized. The hyperbranched polymer is able to be used as a heavy metal chelating agent. Its special three-dimensional space structure is able to alternately chelate with heavy metals to form a large three-dimensional molecular conjugate with low solubility, strong stability, and compactness, which is able to effectively treat wastewater and waste containing heavy metals.

Abstract: A preparation method and use of a graphite felt (GF)-supported metal-organic framework (MOF) cathode material is disclosed. The preparation method includes the following steps: preparing an iron salt, Pluronic F127, a weak acid, 2-aminoterephthalic acid, and a carbon felt; adding the iron salt and Pluronic F127 to deionized water and stirring a resulting mixture; adding the weak acid and 2-aminoterephthalic acid to the mixture, and stirring a resulting mixture to obtain an MOF precursor solution; adding the MOF precursor solution together with a pretreated carbon felt to a reactor, and sealing the reactor for hydrothermal reaction; and washing and vacuum drying a reaction product to obtain the cathode material. With a porous structure and a large specific surface area (SSA), the cathode material significantly increases the output of H2O2 when used in an electric Fenton system.

Abstract: A device for continuous production of polyferric chloride and a method are disclosed. The device includes a first mixing pipeline, a second reaction pipeline, a third reaction pipeline, and a concentration device sequentially connected. The first mixing pipeline, the second reaction pipeline and the third reaction pipeline are each provided with a circulating spray device, and the circulating spray device includes a reflux pump, a reflux pipeline and an atomizer. The atomizer includes an atomizing pipe, and a chemical filler plate for promoting gas-liquid contact is arranged below the atomizing pipe. The reflux pump is used to extract liquid from each reaction tank, and then transport the liquid to the atomizer on the top of the reaction tank. The atomizer is driven by the pressure of the reflux pump or the motor to atomize the liquid.

Abstract: A zirconium-based metal-organic framework material UiO-66(Zr) and a rapid room-temperature preparation method and application thereof are procided. The preparation method includes: (1) mixing a zirconium source and an organic ligand uniformly, then placing in methanol and stirring at room temperature, centrifuging and then discarding a supernatant to obtain a transparent gel-like intermediate product; and (2) heating and drying the intermediate product to obtain UiO-66(Zr). Compared with the prior art, the present invention excludes the use of N,N-dimethylformamide and other toxic organic solvents that are necessary in the traditional solvothermal method, and only needs to stir in methanol at room temperature and dry to obtain UiO-66(Zr). The method has mild conditions and a high yield. Moreover, the product purity is extremely high, and the product activation step can be omitted.

Abstract: A zirconium-based metal-organic framework material UiO-66(Zr) and a rapid room-temperature preparation method and application thereof are provided. The preparation method includes: (1) mixing a zirconium source and an organic ligand uniformly, then placing in methanol and stirring at room temperature, centrifuging and then discarding a supernatant to obtain a transparent gel-like intermediate product; and (2) heating and drying the intermediate product to obtain UiO-66(Zr). Compared with the prior art, the present invention excludes the use of N,N-dimethylformamide and other toxic organic solvents that are necessary in the traditional solvothermal method, and only needs to stir in methanol at room temperature and dry to obtain UiO-66(Zr). The method has mild conditions and a high yield. Moreover, the product purity is extremely high, and the product activation step can be omitted.

Abstract: A method for assembling and synthesizing Cu2O particle-supported porous CuBTC includes the following steps of: 1) dissolving polyvinylpyrrolidone (PVP) in ethanol solution to obtain a PVP-ethanol solution; 2) dissolving copper salt in distilled water, and mixing with trimesic acid, salicylic acid, and the PVP-ethanol solution obtained in step 1) under stirring; and 3) conducting a hydrothermal reaction on the mixed solution obtained in step 2) at 120° C. to obtain Cu2O particle-supported porous CuBTC. The new method introduces salicylic acid during the synthesis of CuBTC. The salicylic acid, as a ligand precursor, forms a porous CuBTC material through the unsaturated coordination of a ligand under the catalysis of Cu ion. The resulting porous CuBTC supported with ultrafine Cu2O nanoparticles can adsorb high-energy molecules and exhibit excellent crystallinity, porosity, and stability.

Abstract: A corrosion inhibitor for a soft water circulation heating and cooling system, wherein the corrosion inhibitor is pentapentanol core hyperbranched macromolecule functionalized by isothiourea and carboxyl, which has a chemical formula of C5H7O5{COC(CH3)[CH2OCOCH2CH(COOH)SC(NH)NH2]2}5. The corrosion inhibitor provided by the present invention is non-phosphorus, biodegradable, non-toxic, low in cost and has good corrosion inhibition effect. Moreover, it has excellent corrosion inhibition performance for circulating heating and cooling systems using soft water as the water source, and can significantly improve the reuse rate of circulating water. The present invention also provides a preparation method of the corrosion inhibitor, which is simple, easy to obtain raw materials and easy to industrialize.

Abstract: An ethoxylated pentaerythritol core hyperbranched polymer with dithiocarboxylate as side group and terminal group and its applications as a heavy metal chelating agent are disclosed, which relates to the field of chemical and environmental protection technology. The hyperbranched polymer has a chemical formula of C[CH2OCH2CH2OCOCH2CH2N(CSSM)CH2CH2NHCSSM]4, wherein M is Na+, K+ or NH4+. A preparation method of the hyperbranched polymer is simple, the raw materials are easily available, and it is easy to be industrialized. The hyperbranched polymer is able to be used as a heavy metal chelating agent. Its special three-dimensional space structure is able to alternately chelate with heavy metals to form a large three-dimensional molecular conjugate with low solubility, strong stability, and compactness, which is able to effectively treat wastewater and waste containing heavy metals.

Abstract: A compound heavy metal chelating agent, which relates to the field of chemical and environmental protection technology, includes dithiocarboxylate functionalized ethoxylated pentaerythritol core hyperbranched polymer and alkylene diamine-N,N?-sodium bisdithiocarboxylate with a molar ratio in a range of 1:1.0 to 1:10.0. The two different structural types of components have the synergistic positive effect. While chelating heavy metals, the compound heavy metal chelating agent alternately combine with heavy metals to form insoluble chelating super-molecular deposits, which has both chelation and flocculation functions. The compound heavy metal chelating agent provided by the present invention is able to reach the standard for treating heavy metal wastewater, and especially low concentration heavy metal wastewater. It has a wide adaptability range, and does not need to add coagulant. Moreover, it is simple in preparation method, easily available for raw materials, low in cost, and easy to be industrialized.

Abstract: Dendritic polymer heavy metal precipitant with double functions of chelation and self-flocculation and its application is provided. The heavy metal precipitant is dithiocarbamates end group polyamidoamine dendritic polymer prepared by reaction of carbon bisulfide and polyamidoamine dendritic polymer with a generation at a range of 1-3 (denoted as PAMAM-(NH2)8G, wherein G is generation number). Due to the special three dimensional spatial structure, appropriate molecular weight, high density of the end chelating group dithiocarbamates, the dithiocarbamates end group polyamidoamine dendritic polymer of the present invention not only has strong chelating performance with the heavy metal iron, the sediment floc formed has a large volume, a fast sedimentation velocity and easy separation. The present invention has high efficiency performance in chelating and flocculating heavy metals.

Abstract: A dithiocarbamate functionalized dendrimer with an alkylenediamine core, a dithiocarbamate pendant functional group and a dithiocarbamate end functional group, as a soil heavy metal immobilization amendment, and a preparation method thereof are provided. The dithiocarbamate functionalized dendrimer has a chemical formula of (CH2)a{N[CH2CH2COOCH2C(C2H5)(CH2OCOCH2CH2N(CSSM)CH2(CH2)bCH2N(CSS M)2)2]2}2, wherein a is a positive integer larger than 2; b is a positive integer at a range of 0-4; and M is Na+, NH4+ or K+. The dithiocarbamate functionalized dendrimer with the alkylenediamine core is used for an in-suit immobilization remediation for soil contaminated by heavy metals, and has advantages of a small dosage, high efficiency, safety and rapidness. The dendrimer is able to effectively immobilize exchangeable and carbonated bound forms of the heavy metals, in such a manner that the immobilized heavy metals are able to resist an influence from natural environment for a long term, such as an acid rain.