414 results about "Iron complex" patented technology

Alpha-olefins are manufactured in high yield and with very high selectivity by contacting ethylene with an iron complex of a selected 2,6-pyridinedicarboxaldehyde bisimine or a selected 2,6-diacylpyridine bisimine, and in some cases a selected activator compound such as an alkyl aluminum compound. Novel bisimines and their iron complexes are also disclosed. The alpha -olefins are useful as monomers and chemical intermediates.

The invention belongs to the technical field of gas purification, and in particular relates to an iron complex desulfurizer suitable for super-gravity desulfurization. The active ingredients of the iron complex desulfurizer are the following components: a soluble iron salt, an iron salt complexing agent, hydrosulfide absorbants comprising alkaline matters and alcamines, and additives comprising astabilizing agent, a synergist, a sulfur granule settling agent and a corrosion inhibitor. The iron complex desulfurizer has the advantages of large accumulative saturation sulfur capacity (reaching 0.60g/L), high absorption speed, high efficiency, stable solution performance without degradation, easy recovery of sulfur, less side reactions, low running cost and the like; and the accumulative saturation sulfur capacity and the absorption speed are obviously improved, so the iron complex desulfurizer is suitable for the characteristics of small liquid circulating volume and short retention time of the super-gravity desulfurization, fully takes the obvious advantages of the super-gravity technology in the wet desulphurization, and is a high-efficiency, economic, practical and environment-friendly iron complex desulfurizer.

The invention relates to a Fenton sewage treatment process and equipment thereof. The process sequentially comprises the following steps: (a) regulating pH value of sewage; (b) adding H2O2 and Fe<2+> to the sewage; (c) adding alkali to generate iron sludge sediment; (d) separating the iron sludge sediment from supernatant liquid; (e) carrying out biochemical treatment after the supernatant liquid outflows; adding acid to discharged muddy liquid containing the iron sludge sediment so that the iron sludge sediment is dissolved; and (f) oxidizing and breaking an iron complex in the solution outflowing in the step (e) into Fe<3+> through electro-catalytic oxidation; electrolyzing and reducing Fe<3+> into Fe<2+> through electrolytic reduction, and refluxing so that the Fe<3+> is sufficiently electrolyzed and reduced into Fe<2+>; and replacing Fe<2+> added in the step (b) with the Fe<2+> obtained through electrolytic reduction. The equipment comprises a pH regulating tank, a Fenton reaction tank, a reaction tank and a sedimentation basin, and further comprises a reflux pump, a dissolving tank and electrolytic regeneration equipment, wherein the electrolytic regeneration equipment comprises an electro-catalytic oxidation device and an electrolytic reduction device. According to the process disclosed by the invention, recycling of iron is realized and discharge of iron slurry is greatly reduced.

The invention discloses a bis (imino) pyridine iron olefin polymerization catalyst and a preparation method and application thereof. The catalyst is a novel bis(imino)pyridine iron complex with the asymmetric substitution of position 2 and 6 of an aromatic ring; and the structural formula of the catalyst is shown in formula (I), wherein X is halogen, R1 is alkyl, and R2 is the alkyl or oxyl. The catalyst can be obtained through a Friedel-Crafts reaction, a ketoamine condensation reaction and a coordination reaction. The preparation method is simple, and raw materials are cheap. The catalyst can catalyze the polymerization of ethylene under the activation of MAO to prepare polyethylene with high molecular weight and wide distribution.

The invention relates to the technical field of conjugated diene catalytic polymerization, in particular to an iron-based catalyst; the iron-based catalyst comprises a main catalyst and an auxiliary catalyst; the main catalyst is pyridylimine iron complex, the auxiliary catalyst is methylaluminoxane, and a molar ratio of aluminum in the auxiliary catalyst to iron in the main catalyst is 500:1. Application of the iron-based catalyst in isoprene polymerization is also disclosed. The iron-based catalyst of the application has high activity in catalyzing isoprene, the obtained polymer has high molecular weight and narrow molecular weight distribution, the microscopic structure of the polymer may be controlled through cutting the main catalyst structure, the proportion of cis-1,4 structure in isoprene is adjustably in the range of 62.7% to 86.7%, the proportion of trans-1,4 structure is adjustably in the range of 2.8% to 8.2%, and the proportion of 3,4 structure is adjustably in the range of 6.7% to 34.5%. The iron-based catalyst is insensitive to reaction temperature.

The present invention features a ergonomically designed and structured golf bag top and club separator. The golf bag top and club separator comprises a perimeter support member having integrally formed tiered sections both along its longitudinal and lateral axes, a wood complex, an iron complex located opposite from and offset below the wood complex, and a plurality of strategically placed dividers therein to provide vertical disposition and segregation of wood-type golf clubs. Through its unique design, the present invention provides vertical segregation of the wood complex, thus providing optimal positioning, travel, access, and retrieval of golf clubs inserted and housed therein, as well as providing added protection of the clubs from one another. The wood complex is vertically segregated and positioned proximate or distal the body of the user.

Alpha-olefins are manufactured in high yield and with very high selectivity by contacting ethylene with an iron complex of a selected 2,6-pyridinedicarboxaldehyde bisimine or a selected 2,6-diacylpyridine bisimine, and in some cases a selected activator compound such as an alkyl aluminum compound. Novel bisimines and their iron complexes are also disclosed. The alpha-olefins are useful as monomers and chemical intermediates.

The invention is directed to methods of treating Restless Leg Syndrome by administering iron complexes with specificed iron release rates or specified iron core size.

The invention relates to a catalyst for use in ternary polymerization of norbornene, maleic anhydride and cyclohexene and a ternary polymerization method. The catalyst is characterized by being prepared by using a method comprising the following steps of: dissolving ferric trichloride, a ligand and an alkyl metal compound into a first solvent, putting into a dry single-mouth glass bottle in an inert atmosphere, sealing a bottleneck with a latex tube, preserving heat in a water bath of 50 DEG C for 20-30 minutes, and cooling to obtain an iron complex catalyst; adding norbornene, maleic anhydride and cyclohexene into a dry single-mouth glass bottle in an inert atmosphere, adding a second solvent into the single-mouth glass bottle, dissolving, and sealing the bottleneck; adding the iron complex catalyst into the single-mouth glass bottle, and reacting at the constant temperature of 40-100 DEG C for 2-3 hours; and precipitating an obtained reaction product, washing and drying to obtain a norbornene-maleic anhydride-cyclohexene terpolymer. The catalyst provided by the invention can be used for catalyzing polymerization under the normal pressure at a low temperature, and the copolymer yield is high.

Methods for determining the iron content of an in-use lubricant, which may be used on-site are disclosed. Test kits for conducting the methods are also disclosed. In one embodiment, a method according to the invention comprises: adding a predetermined amount of said in-use lubricant to an active solvent comprising predetermined amounts of an apolar organic solvent, a polar organic solvent, an organic acid, water, an iron complexing agent and a reducing agent, said active solvent having a pH between 2 and 4; thoroughly mixing the lubricant and the active solvent until the lubricant is completely dissolved; allowing the mixture to react completely and separate into a top layer and a bottom layer, the bottom layer comprising an iron complex; filtering at least a portion of the bottom layer of the mixture directly into a receptacle suitable for absorbance measurement in the visible range; photometrically measuring the net absorbance of the filtered solution at frequencies in the visible range; and converting the absorbance measurement to ppm iron content of the lubricant.

The invention provides a treatment technology for Claus tail gas containing sulfur dioxide, hydrogen sulfide and organic sulfur. The treatment technology comprises the following steps: (1) a heating step; (2) a reduction and transformation step; (3) a cooling step; (4) an oxidation-reduction step; and (5) a recovery step. According to the treatment technology, the hydrogen sulfide in the tail gas is absorbed by means of iron complex liquid phase oxidation-reduction, sulfur recovery rate is more than 99.95%, sulfur content in the tail gas is less than 1.0mg/m<3>, and the treatment technology has the characteristics of low investment, low energy consumption, high sulfur recovery rate and great operation flexibility.

The scrubbed waste water treating and resource recovering process includes introducing HCl to waste water while distilling off benzene and chlorobenzene; eliminating iron through passing through strong alkali anionic exchange resin to obtain hydrochloric acid effluent; eluting iron complex anion in the strong alkali anionic exchange resin with distilled water as regenerant to obtain eluting liquid, which is high concentration iron trichloride solution capable of being used as water purifier, while regenerating the resin. When the process is used in treating waste water containing Fe ion 2000-8000 mg/L, hydrochloric acid 2.5-4.0 mol/L, benzene 500-1000 mg/L and chlorobenzene 100-200 mg/L, Fe ion over 99 % and benzene and chlorobenzene over 95% may be eliminated while the resource being recovered.

The invention discloses a method for separating, purifying and recycling waste hydrochloric acid containing iron, belonging to the field of wastewater treatment. The method comprises the following steps: (A) filtrating with sands to remove suspended matter in iron casting waste hydrochloric acid flushing fluid, dropwise adding oxidant, ensuring the oxidized flushing fluid through a absorption tower filled with strongly alkaline anion exchange resin, adding industrial concentrated hydrochloric acid to increase the concentration of HCl in the treated effluent liquid and returning the obtained solution which is used as iron casting hydrochloric acid flushing fluid to recycle, to the production flow; (B) ensuring distilled water or deionized water used as regenerant through a resin bed to elute the exchanged iron complex genitive ions on the strongly alkaline anion exchange resin and forming high concentration ferric chloride water solution which can be used as purifying agent and is sentback to the production flow to use. In the invention, strongly alkaline anion exchange resin is used for the treatment and resource recovery of iron casting waste hydrochloric acid flushing fluid in the fields such as electroplating, iron and steel and the like so as to realize the complete recycling of hydrochloric acid; water is used as resin regenerant to regenerate resin and generate ferric chloride water solution simultaneously so that water can be used to prepare purifying agent.

The invention belongs to the technical field of anticorrosive paints, and provides a waterborne rust conversion varnish and a preparation method. A waterborne composite resin emulsion system is used as a film forming matter, the coating can wet and penetrate into a dust layer of the whole steel surface through the effect of a penetrating agent, and a dust converting agent reacts with rust iron oxide formed on the surface of steel to form a stable macromolecule organic resin-iron complex, so that a dust layer binds to form a continuous closed coating layer, and the shield anti-corrosion protection effect is achieved. The coating has the certain anti-corrosion performance, and has the good matching property with other anti-corrosion coatings; by the adoption of the dust conversion varnish, construction strength and difficulty can be lowered, the labor cost is reduced, environmental pollution is reduced, construction environment is kept clean, and long-acting anti-corrosion protection is achieved for steel base materials.

The present invention relates to compounds of formula (I) wherein each of X, Y, Z is independently selected from O, S, NR¹, CR²R³, N and CR⁴, and where optionally X—Y, Y-Z, Z-E¹ and X-E² each independently form part of a saturated or unsaturated ring system which may be substituted or unsubstituted; m is 0 or 1; M is a metal selected from Ti[III], Ti[IV], Fe[II], Fe[III], Co[I], Co[II], Co[III], Ni[II], Cr[III], Mn[II], Mn[III], Mn[IV], Ru[II], Ru[III], Ru[IV], Pd[II], V[II], V[III], V[IV], V[V], Cu[I], Cu[II], Rh[I], Rh[III], Mo[III], Mo[V], Re[I] and Re[II]; each of E¹ and E² is independently selected from O, S, NR⁵, N, P, PR⁶, where at least one of either E¹ or E² carries a formal negative charge; L² is a one electron donor ligand; n is zero or an integer such that the compound has an overall charge of zero or +1; L¹ is NR⁷R^B, PR⁷R^B, OR⁷, SR⁷, O, S or NR¹⁶, imidazolyl, pyridinyl, benzimidazolyl or quinolinyl; each of R^1-8 and R¹⁶ is independently H or a hydrocarbyl group; Q is a linker group; and r is 0 or 1. Further aspects of the invention relate to catalyst compositions comprising compounds of formula (I), and their use in the polymerisation of olefinically unsaturated monomers.

The invention relates to a catalyst for ternary copolymerization of norbornenes, tetrafluoroethylene and pentenes and a ternary copolymerization method. The catalyst is characterized in that the catalyst is prepared through the following method comprising the steps of: dissolving iron dichloride, a ligand and an alkyl metal compound in a solvent in a dry single-neck glass bottle in an inert gas atmosphere, sealing a bottle mouth through an emulsion pipe, keeping the constant temperature in a water bath at the temperature of 40-50 DEG C for 10-30min, and cooling to obtain an iron complex catalyst. Compared with the prior art, the catalyst provided by the invention is a novel iron complex catalyst which can produce catalytic activity in an nitrogen-protected system at a certain pressure and the temperature of 20-120 DEG C so as to catalyze the ternary copolymerization of the norbornenes with the tetrafluoroethylene and the pentenes, and a product after soaking in methanol is very easy to wash and separate. The catalyst has the characteristics of high copolymer yield, low reaction temperature, low price, easiness in obtainment, high catalytic efficiency and the like.

Provided is a process by which soil and/or ground water polluted with lowly water-soluble organochemicals can be easily and efficiently purified at a low cost. A peroxide activator for use in activating peroxides used in the purification of soil and/or ground water polluted with lowly water-soluble organochemicals, characterized by comprising both an iron complex and a diatomite-containing adsorbent material that can adsorb organochemicals; and a purifying process using the same.

The invention discloses an alkyl pyridine imine iron-based catalyst and a preparation method and application thereof and relates to the technical field of conjugated diene catalytic polymerization. The iron-based catalyst is composed of a main catalyst and an auxiliary catalyst, the main catalyst is a pyridine imine iron complex, the auxiliary catalyst is methylaluminoxane or alkyl aluminum, and amolar ratio of the auxiliary catalyst to the main catalyst is 20:1-1000:1. An iron catalysis system presents ultrahigh activity in isoprene polymerization, obtained polymer is high in molecular weight and narrow in molecular weight distribution, microstructure of the polymer can be controlled by adjusting structure of the main catalyst, and reaction activity depends on the main catalyst with different substituent groups and the auxiliary catalyst of different types; selectivity of the microstructure of the polymer slightly depends on temperature.

The present invention discloses a method for purifying polysaccharide iron complex, in particular to a method for desalination and concentration of the crude aqueous polysaccharide iron complex with the ultrafiltration membrane separation technology. Specific methods include the following steps of filtering the crude aqueous polysaccharide iron complex with ultrafiltration membrane components, whereby the pore diameter of ultrafiltration membrane components is between 2 and 50nm and molecular weight cutoff is between 5K and 150KDa; intercepting the polysaccharide iron complex by the ultrafiltration membrane, continuously discharging the sodium chloride and free iron ions in the crude aqueous solution through the osmotic solution to improve the purity and the concentration of polysaccharide iron complex in the ultrafiltration retentate liquid. The method for desalination and concentration of the crude aqueous polysaccharide iron complex with the ultrafiltration membrane provided by the invention has the following advantages of 1. simple operation process, safety and energy saving, mild condition and easy for continuous production; 2. reducing the salt concentration in the aqueous polysaccharide iron complex, and increasing the concentration of polysaccharide iron with recovery rate of more than 95%.

Provided are methods of preparing polymers, such as polyisoprene, polybutadiene, polypiperylene, polycyclohexadiene, poly-β-farnesene, or poly-β-myrcene, using iron complexes. Also provided are novel iron complexes, pre-catalysts, intermediates, and ligands useful in the inventive polymerization system.

The invention discloses a bipyridine iron complex as well as a preparation method thereof and an application of the complex in conjugated diene polymerization, and belongs to the field of conjugated diene catalytic polymerization. The invention provides the bipyridine iron complex aiming at the technical problems that in the prior art, a catalyst used in a synthetic process of a polyconjugated diene with a high branched-chain degree has high costs, and the polymer molecular weight and microstructure adjusting capability is poor. The bipyridine iron complex is used as a main catalyst in polypentadiene polymerization and shows high activity, the obtained polymer with a high branched-chain degree has the characteristics that the polymer has a high molecular weight, the molecular weight distribution is narrower, the polymer molecular weight can be adjusted through a chain transfer reagent and the like, and the obtained polyconjugated diene rubber has the characteristics of a high branched-chain content and an ultra-high molecular weight; because a large number of side groups exist on molecular chain links of the rubber, the rubber is mainly used for preparing high-performance tires having good wet skid resistance and low friction heat generation and other related rubber products; and the complex has the prospect of being applied to industrial production of the polyconjugated diene.

The invention relates to a method for manufacturing a nitrogen-doped multi-wall carbon nano tube. The method comprises the following steps: uniformly mixing a mesoporous silica mold plate and a nitrogenous macrocyclic iron complex in a physical mechanical mode so as to obtain a mixture, wherein the mesoporous silica mold plate is of a three-dimensional cubic open-framework structure and a surfactant is not removed, and the nitrogenous macrocyclic iron complex can be simultaneously used as a carbon source, a nitrogen source and an iron source; carrying out heat treatment on the mixture so as to prepare an iron oxide/N/carbon nano tube/silicon dioxide mold plate composite material; removing the silicon dioxide mold plate of the composite material through strong alkali; removing the iron oxide of the composite material through strong acid so as to obtain the nitrogen-doped multi-wall carbon nano tube. By utilizing the method, complex steps the conventional manufacturing process of the nitrogen-doped multi-wall carbon nano tube are effectively avoided, the method is simple, convenient and rapid, and time and labor are saved.