160 results about "Iron complex" patented technology

The invention provides a low-cyanide gold leaching agent system and a dump leaching process thereof, and belongs to the technical field of hydrometallurgy. According to the method, a synergistic process of'interface activation, cyanide etching and iron precipitation inhibition 'is constructed by designing a low-cyanide gold leaching agent system. The amino acid auxiliary leaching agent adsorbs the gold surface to weaken lattice energy, so that the etching efficiency of trace cyanide ions is improved; mercapto-containing malic acid is used as a chelating agent, specific mercapto in molecules of the mercapto-containing malic acid and iron ions form an ultrahigh-stability water-soluble complex, generation of ferric hydroxide precipitates is thoroughly blocked, ferrous ions stabilized by the chelating agent are subjected to in-situ oxidation through dissolved oxygen and efficiently regenerated into potassium ferricyanide, and accumulation of free cyanogens in a solution system is eliminated; meanwhile, a chelating agent-iron complex forms a self-buffering pair, the pH of the dump leaching solution is accurately controlled, and secondary precipitation caused by local alkalization is prevented. According to the process, under the synergistic effect that the core chelating agent guarantees permeation stability and the leaching aid accelerates gold dissolution, the heap leaching period is compressed to 45 days.

The invention relates to the technical field of medicine preparation, in particular to a preparation method of ferric carboxymaltose. The preparation method comprises the following steps: by taking first maltodextrin and second maltodextrin as raw materials, oxidizing to generate carboxyl maltodextrin; complexing the carboxyl maltodextrin and ferric trichloride to prepare a carboxyl maltodextrin iron complex; and finally, curing and refining the carboxyl maltose iron complex to obtain the carboxyl maltose iron. Wherein the DE value of the first maltodextrin is 10 to 14; the DE value of the second maltodextrin is 16 to 20. According to the invention, two kinds of maltodextrin with specific DE values are used as raw materials, so that the ferric carboxymaltose can keep a relatively small dispersion coefficient, and the molecular weight is accurate and controllable; meanwhile, the source of the raw materials is widened, and the raw materials are not limited to a certain specific DE value any more.

The invention discloses a method for preparing ferromanganese phosphate MnxFe (1-X) PO4, which comprises the following steps of: mixing a manganese pyrophosphate complex solution and an iron phosphate complex solution, and decomplexing to form ferromanganese phosphate precipitate; wherein the manganese pyrophosphate complex is formed by manganese III ions and pyrophosphoric acid; the iron phosphate complex is formed from phosphate ions and iron III ions. According to the preparation method of the ferromanganese phosphate, the ferromanganese phosphate product can be stably obtained, and the proportion of Mn to Fe in the ferromanganese phosphate can be adjusted according to needs.

The invention relates to a method for recovering valuable components from high-copper and high-iron complex gold extraction broken carbon roasting slag. The method comprises the following steps: grinding and grading: grinding and grading a material to be treated into a fine material with the particle size of-0.074 mm accounting for 70%-80%; flotation decarburization is conducted, specifically, primary roughing is conducted on the fine material slurry, carbon-containing concentrate and tailings are obtained, and the carbon-containing concentrate is returned to an original roasting ashing system to be roasted again to obtain concentrate roasting slag; selective leaching of copper: feeding the tailings and the concentrate roasting slag into an ammonia-chlorine solution for pre-leaching to obtain copper-containing leaching liquid and leaching slag; first-stage preferential leaching is conducted, specifically, the leaching residues are fed into a cyaniding system to be subjected to first-stage preferential leaching, and a gold and silver pregnant solution and first-stage leaching residues are obtained; second-stage intensified leaching is conducted, specifically, the first-stage leaching residues are subjected to second-stage intensified leaching, and gold and silver pregnant solution and second-stage leaching residues are obtained; and recovery of element copper: conveying the copper-containing immersion liquid to a copper recovery system for distillation to obtain ammonia water and a copper hydroxide precipitate. According to the method, efficient comprehensive recovery of gold, silver and copper in the high-copper-iron complex gold extraction broken carbon roasting slag is achieved.

The invention provides a method for preparing a lithium iron phosphate material, and belongs to the technical field of lithium ion battery positive electrode materials. According to the method, the Fe element in the industrial iron-containing waste liquid is converted through a microbiological method, then enrichment is conducted through humic acid, the enrichment efficiency is high, and uniformity is good; the microbe-enriched iron complex is used as an iron source and a reducing agent, and the carbon coating uniformity is improved through two-step sintering, so that high magnification and high low-temperature retention rate are realized.

The application provides an amido phenolic iron complex, a preparation method and application thereof. The amido phenolic iron complex comprises a metal central atom Fe and a ligand coordinated with the metal central atom Fe, and the ligand has a structure shown in formula I: in formula I, R1, R1', R2 and R2' are the same or different, and each is independently selected from H, Me, t Bu; and R is selected from the amido phenolic iron complex. The preparation method is simple, as a catalyst, the amido phenolic iron complex has the characteristics of safety, non-toxicity, green environmental protection, low cost, mild catalytic condition, no additional solvent, high catalytic efficiency and high selectivity.

The application belongs to the technical field of antitumor drugs, and discloses an iron complex as well as a preparation method and application thereof.The preparation steps of the iron complex are as follows: 1, reacting 2-hydrazinylbenzothiazole, a ketone compound and a solvent to obtain a ligand; and 2, reacting the ligand, ferric chloride and a solvent, and then cooling and crystallizing to obtain the iron complex.The obtained iron complex can effectively induce cancer cell ferroptosis, can effectively inhibit the growth of breast cancer, lung cancer, liver cancer or glioma, has high selectivity, has small toxicity to normal cell strains, and has better treatment effect compared with existing clinical drugs, such as cisplatin.

Catalytic systems capable of catalyzing enantioselective C-H functionalization reactions are described, and methods of use thereof are described. These catalytic systems contain an iron complex as a host catalyst, and a diammonium guest template as a co-catalyst. The iron-based main catalyst contains a crown ether phthalocyanine ligand. The diammonium guest template is a bidentate compound with chirality. The iron-based host catalyst and the bidentate ammonium guest template can provide a complex spatial environment for stereotactic and site-selective C-H functionalization, such as C-H amination. For example, enantioselective C-H amination reactions carried out using the disclosed methods can achieve high enantiomer ratios (i.e., at least 2: 1) and optionally high yields (i.e., at least 30%).

The application discloses a kind of post-transition metal complexes and preparation method and application thereof, and the post-transition metal complex provided by the application can be applied to the polymerization of ethylene as catalyst, and the molecular weight of polymer is regulated by changing ligand structure and polymerization condition;Especially by changing its metal center, the molecular weight distribution of polyethylene has obvious regulating effect, wherein the polyethylene obtained by iron complex catalysis has relatively wide molecular weight distribution (M w / M n :2.0-10.7), and the molecular weight of polyethylene obtained by cobalt complex catalysis is mostly narrow (M w / M n :1.6-2.2), and both can be used to prepare highly linear polyethylene.The preparation method of the complex described in the application has the advantages of mild conditions, short cycle, simple operation, etc.The complex prepared by the method shows high catalytic activity, which can be up to 2.56×10 7 g (PE) (mol Fe) ‑1 h ‑1 , and high thermal stability, which meets the operating temperature of industrial production and has further industrial application prospect.

The present invention provides an azo iron complex dye which does not contain harmful heavy metals, has sufficient practical solubility to organic solvents, and exhibits a good black color, the azo iron complex dye being represented by the following formula (1). 【Chem. 1】(In formula (1), R1 and R2 are each independently a linear or branched alkyl group having 3 to 10 carbon atoms, R3 is an electron-withdrawing group, R4 is a linear or branched alkyl group having 1 to 5 carbon atoms or a linear or branched alkoxy group having 1 to 5 carbon atoms, R5 is a nitro group, a sulfonamide group, or a halogen atom, R6 is a hydrogen atom, a linear or branched alkyl group having 1 to 8 carbon atoms, a nitro group, or a halogen atom, R7 is a hydrogen atom or a linear or branched alkyl group having 3 to 12 carbon atoms, and A+ is a monovalent cation.)

The application discloses a preparation method of a leather-wood-based electronic sensing floor, and specifically comprises the following steps: mixing gelatin and deionized water, adding KH570, adjusting pH with hydrochloric acid to obtain modified gelatin; adding chitosan to an FeCl3 aqueous solution to obtain a chitosan-iron complex; dissolving the modified gelatin in water, mixing the modified gelatin with the chitosan-iron complex, and adding MXene for ultrasonic dispersion; adding polyethylene glycol diacrylate and ammonium persulfate to obtain a sensing adhesive layer precursor solution; hollowing the inside of a silica gel pad, placing the silica gel pad between a leather and a wood board, placing two copper wires on the two sides of the silica gel pad, injecting the sensing adhesive layer precursor solution into the inside of the silica gel pad, clamping the leather and the wood board, heating and polymerizing, taking out the silica gel pad, and obtaining the leather-wood-based electronic sensing floor. The electronic sensing floor prepared by the application has excellent stability, durability, strain and pressure sensing properties; in addition, the preparation method has simple preparation process, simple operation process and mild conditions.

The invention discloses a preparation method of a zymosan iron compound, and belongs to the technical field of deep processing of yeast. The method comprises the following steps: oxidizing a zymosan solution with hydrogen peroxide, sequentially adding sodium citrate and ferric salt, and carrying out complexation reaction to obtain zymosan iron. The iron content of the polyferose prepared by the method is more than or equal to 10%, the water solubility is more than or equal to 90%, and the polyferose has good stability and no rust flavor. Due to the slow release characteristic, gastrointestinal stimulation can be remarkably reduced, continuous release in the stomach is achieved, liver iron accumulation can be effectively improved, and tissue utilization and storage of iron are promoted.

The present invention relates to the field of iron complexes, and discloses a complex and a preparation method thereof, a catalytic preparation method of polycarbonate, and a method for catalyzing the polymerization of cyclohexene oxide and phthalic anhydride. The complex has a structure shown in formula (I) or formula (II), and has the characteristics of simple preparation method, high catalytic efficiency, and low production cost. On the one hand, it can cooperate with a catalyst to catalyze the reaction of CHO and CO2 to generate polycarbonate, and has good selectivity. On the other hand, the binuclear iron-based complex can catalyze the polymerization of PA and CHO alone through the synergistic effect of bimetallic agents; at the same time, it can cooperate with a catalyst to catalyze the polymerization reaction of CHO and PA to obtain a polyester with an ester content of 11%-99%. In the catalytic reaction process, the amount of catalyst used is low, there is no problem of heavy metal residues, the price is low, and the reaction conditions are mild, and it has good industrial application prospects. #imgabs0#

The present invention provides a porous composite microwave absorber derived from a zinc-iron complex and a preparation method thereof. Using ferric chloride, zinc nitrate, and tetrazole acetic acid as organic ligands and water as a solvent, under the condition of 80-90 oC °, a zinc-iron heteronuclear energetic complex {[ZnFe3O(tza)6(H2O)3](NO3)3·5H2O} is synthesized. n After it is explosively decomposed in a sealed reaction kettle at 280 oC °, and then calcined in a nitrogen atmosphere at 650 o °C for 2 hours, a nano- and micron-scale composite powder composed of Fe, ZnO, Fe3O4, ZnFe2O4, amorphous carbon, and graphene can be obtained. After this powder is mixed with paraffin in a mass ratio of 7:3, in the range of 1.2-18 GHz and with a thickness between 1-10 mm, there is an effective absorption of more than 90% (≤ -10 dB). Therefore, the obtained composite microwave absorption powder is a potential high-efficiency microwave absorption material both in daily life and in military applications. This preparation method has the characteristics of being green and environmentally friendly and having a simple preparation process.

The invention provides preparation and application of a 4-(trifluoromethyl)-pyridine dialdimine ligand and an iron complex of the 4-(trifluoromethyl)-pyridine dialdimine ligand, and belongs to the technical field of catalysts. The novel 4-(trifluoromethyl)-pyridine dialdimine ligand provided by the invention can form a complex with iron to be used as a high-efficiency catalyst for a methyl zincing reaction, compared with a traditional metal catalyst, the ligand has higher catalytic performance, and the ligand has the following structural formula: an iron complex with the following structural formula: (1)-(1)-(2-(4-trifluoromethyl)-pyridine dialdimine)-(1-(4-trifluoromethyl)-pyridine dialdimine)-(1-(4-trifluoromethyl)-pyridine dialdimine).

The invention discloses a method for removing sulfate ions in iron ethylenediaminetetraacetate complexing wet denitration liquid by solvent elution, and belongs to the field of chemical environmental protection. The method for removing the sulfate ions in the ferric ethylenediaminetetraacetate complexing wet-process denitration liquid by solvent elution comprises the following steps: regenerating the ferric ethylenediaminetetraacetate complexing circulating denitration liquid to be treated, then introducing a solvent, standing and crystallizing, and filtering, thereby obtaining the sulfate ions in the ferric ethylenediaminetetraacetate complexing wet-process denitration liquid. After crystallization is finished, filtering and distilling to obtain ferric ethylenediaminetetraacetate complexing wet-process denitration liquid without sulfate ions; adjusting the pH value of the obtained denitration liquid, and introducing the denitration liquid into a denitration process for circulating denitration; the solvent is any one of ethanol, methanol and phenol. The method can effectively solve the problem that the denitration capacity of the denitration liquid is reduced due to sulfate accumulation of the circulating denitration liquid, the process is simple and easy to implement, guarantee is provided for cyclic utilization of the complexing denitration liquid, and good economic and environment-friendly benefits can be obtained.

The utility model discloses a reaction system for continuously preparing pentachloropropane and tetrachloropropane, which comprises a reaction kettle, a heat exchanger, a static mixer and a Venturi ejector which are connected in sequence, the reaction kettle comprises a reaction kettle body, a stirring device, a magnetic attraction device and a cooling and heating device, wherein the stirring device, the magnetic attraction device and the cooling and heating device are respectively arranged on the reaction kettle body. According to the utility model, iron powder is skillfully fixed in the reaction kettle and is uniformly distributed, so that a larger contact area between liquid and solid phases is provided, the formation of a divalent iron complex is accelerated, and an effective catalyst is supplemented for a reaction system in time. A large amount of circulating liquid can quickly remove reaction heat, and after newly added carbon tetrachloride and auxiliaries are uniformly mixed, vinyl chloride or ethylene gas is uniformly dissolved in the circulating liquid through the venturi ejector, so that the vinyl chloride or the ethylene gas reacts quickly.

Disclosed is a process for asymmetric cis-dihydroxylation ("AD") of styrene and conjugated dienes to produce cis-glycols of styrene and conjugated dienes or tetrols of conjugated dienes in high yields (i.e. Yields > = 30%) and high enantioselectivity (i.e. Enantiomeric excess > = 60%). The process uses an iron-based catalyst, such as one or more Fe (II) complexes, etc., as a catalyst. The process generally includes: (i) maintaining the reaction mixture at a temperature sufficient to form a product for a period of time, where the reaction mixture contains styrene or conjugated diene, one or more iron-based catalysts, an oxidizing agent, and a solvent, and where the product contains a cis-diol or tetraol.

The invention relates to the technical field of functional food, in particular to a polypeptide composition for regulating menstruation and nourishing blood and a preparation method thereof, and the polypeptide composition comprises the following raw materials: a Chinese wolfberry extract, an astaxanthin-fish oil co-coated preparation, a red algae oligosaccharide iron complex, maltodextrin and folic acid. In the polypeptide composition for regulating menstruation and nourishing blood and the preparation method thereof, the astaxanthin-fish oil co-coated preparation stably wraps the strong antioxidant astaxanthin and the fish oil through a complex coacervation microencapsulation technology, so that excessive free radicals generated by menstrual physiological stress can be efficiently eliminated, inflammatory response of uterine tissues can be relieved, and discomfort symptoms such as dysmenorrhea and the like can be relieved; according to the red algae oligosaccharide iron complex, oligosaccharide is used as a natural carrier of an iron element and is absorbed in an oligosaccharide iron chelating form in intestinal tracts, the absorption way of traditional ferric salt is avoided, the bioavailability is greatly improved, the iron element can be efficiently and mildly supplemented, and iron-deficiency anemia is improved.

This invention discloses an iron complex with a triazacyclic nonane macrocyclic skeleton, its preparation method, and its applications, belonging to the field of coordination chemistry. The iron complex has a triazacyclic nonane macrocyclic skeleton with two acetate side groups and one pyridine-N derivative side group. The iron complex exhibits excellent catalytic activity in the aerobic oxidation of N-aryltetrahydroisoquinoline, while also possessing good stability. The solvents for the catalytic reaction are water and acetonitrile, resulting in low pollution. This invention features mild reaction conditions, simple synthesis operations, and straightforward post-processing, meeting the requirements of environmental friendliness and clean production.

The invention relates to a soil covering quenching mechanical strengthening method for a metal part, and belongs to the technical field of green metallurgical material processing mechanical strengthening. Preparing quenching covering soil for quenching; preparing heat preservation covering soil for quenching; preparing pasty covering soil, adding water into the quenching covering soil and the heat preservation covering soil according to 12-75% of the mass of the covering soil respectively, and preparing pasty quenching covering soil and pasty heat preservation covering soil respectively; metal wires or meshes prepared from iron complex aluminum wires cover the positions, needing to be strengthened, of the metal parts, pasty quenching covering soil is smeared at the positions needing high hardness and friction resistance, and pasty heat preservation covering soil is smeared at the positions needing plasticity and toughness; and then heating the whole body to 550-1200 DEG C, then rapidly placing the whole body in saline water or oil for quenching, repeating for more than one time as required, and after quenching is completed, taking down the metal net and the covering soil to obtain the metal parts with different properties at different positions.

The present invention relates to an iron complex having the general formula (I) or a pharmaceutically acceptable salt thereof. The present invention also relates to a pharmaceutical composition formulated for oral and / or parenteral administration, preferably intravenous, said pharmaceutical composition preferably being formulated as an aqueous solution comprising said complex or salt. The present invention further relates to said complex or a salt thereof or said pharmaceutical composition for use as a contrast agent for magnetic resonance imaging (MRI), as well as a method and a kit for in situ preparation of said complex or salt and said pharmaceutical composition.

The invention discloses an iron complex with a triazacyclononane macrocyclic skeleton as well as a preparation method and application of the iron complex, and belongs to the technical field of coordination chemistry. The iron complex has a triazacyclononane macrocyclic skeleton, and is attached with two acetate side groups and one pyridine-N derivative side group; the iron complex shows excellent catalytic activity in the aerobic oxidation reaction of N-aryl tetrahydroisoquinoline and has good stability, solvents for the catalytic reaction are water and acetonitrile, and pollution is small. The method is mild in reaction condition, simple in synthesis operation and simple in post-treatment, and meets the requirements of environment friendliness and clean production.

The invention discloses a ferrous sulfide cleaning solution and a preparation method thereof, the cleaning solution is prepared from a suspending agent, a penetrant, a deoxidant, a solid deodorization passivator and water according to a certain weight part ratio, and the solid deodorization passivator is prepared from an oxidant, an activator, a passivator and a hydrogen sulfide inhibitor. During cleaning, the cleaning agent can permeate into a FeS deposition layer to enable the FeS deposition layer to loosen and fall off, FeS is converted into a soluble iron complex, secondary deposition of iron elements is avoided, cleaning waste liquid does not contain heavy metal ions, pollution to the environment is reduced, the treatment difficulty and treatment cost of the cleaning waste liquid are reduced, and the environmental pollution is reduced as much as possible; besides, in the cleaning process, generation of H2S can be reduced as much as possible, hydrogen sulfide can be adsorbed, release of hydrogen sulfide is inhibited, odor is eliminated, poison of hydrogen sulfide to operators is reduced, air pollution is reduced, and the cleaning agent is green and environmentally friendly.

The invention discloses a heat-resistant complex iron desulfurizer and a preparation method and application thereof, and relates to the technical field of desulfurizers. The heat-resistant complex iron desulfurizer is obtained by chelating n-alkanoic acid-modified carboxymethyl chitosan, fulvic acid, polymaleic acid and soluble iron salt; wherein the n-alkanoic acid-modified carboxymethyl chitosan, fulvic acid and polymaleic acid all have good temperature stability, react quickly with hydrogen sulfide under high temperature conditions, thereby realizing efficient desulfurization, and can still perform rapid desulfurization and regeneration reactions at 60°C, and can meet the needs of most high-temperature desulfurization in production. For example, when the desulfurization reaction is performed at a temperature above 60°C, the use days of the desulfurizer can be reduced or the use amount can be increased for adjustment.

Solid absorbent compositions and methods for removing mercaptan sulfur compounds from hydrocarbon streams are provided. These compositions can include porous granular activated carbon particles having an internal pore surface containing a bound trinuclear basic iron(III) acetate complex containing a [Fe3(μ 3 -O)] core structure.

The invention discloses an iron monatomic catalyst with controllable doping of elements in a p region and application of the iron monatomic catalyst. The method comprises the following steps: firstly, mixing doping sources (boric acid, phosphoric acid and sulfuric acid) with ferrous ions, and then adding an organic ligand (oxalic acid) to construct iron complexes with different coordination configurations; the components are organized into a supramolecular precursor with a rod-like structure through a supramolecular self-assembly process of the melamine and the cyanuric acid. In an argon atmosphere, the precursor is subjected to a high-temperature pyrolysis process to synthesize a series of iron monatomic catalysts controllably doped with elements in a p region. By constructing an asymmetric Fe-X1N3 configuration (X represents a doping element) and accurately controlling the doping amount and position of elements in a p region, the coordination structure and electronic characteristics of the Fe monatomic catalyst are effectively regulated and controlled, regulation and control of a persulfate (PMS) activation path are realized, the activity and selectivity of the catalyst are improved, and a new thought is provided for control and treatment of environmental pollutants.

The invention provides application of an organic iron source in preparation of feed or medicine for relieving chicken eimeria tenella disease, and relates to the technical field of feed additives and veterinary drugs. The organic iron source comprises one of a soybean protein iron chelate, a glycine iron complex and a methionine iron chelate. The feed or the medicine has at least one of the following functions: (1) the content of immune globulins IgA, IgG and IgM in chicken serum infected by eimeria tenella is increased; (2) reducing the expression level of the appendicular factors of the appendicular factors after the appendicular factors are infected by the eimeria tenella, wherein the appendicular factors of the appendicular factors comprise IL-1beta, IL-8, TNF-alpha and IFN-gamma; (3) the death rate of the chicken infected by eimeria tenella is reduced; (4) increasing the weight of the chicken infected by eimeria tenella; and (5) reducing the cecum lesion score of the chicken infected by the eimeria tenella.

The invention provides a desulfurizing agent and application thereof. The desulfurizing agent comprises a first complexing agent-iron complex, a second complexing agent-iron complex and ionic liquid, the first complexing agent is EDTA (Ethylene Diamine Tetraacetic Acid); the second complexing agent is selected from at least one of HEDTA, citric acid, salicylic acid, sulfosalicylic acid and tartaric acid; the ionic liquid comprises at least one of substituted or unsubstituted imidazole cations, pyridine cations, thiazole cations, piperidine cations, pyrazole cations and oxazole cations; and further comprises at least one of oxalate anions, acetate anions, salicylate anions, sulfosalicylate anions, citrate anions and tartrate anions. The desulfurizer has the advantage of high total sulfur removal rate.