65 results about "Ferric oxyhydroxide" patented technology

The invention provides a method for treating complexed chemical nickel electroplating wastewater and aims at the problem in the existing complexed chemical nickel electroplating wastewater treatment processes that the nickel ion removal efficiency is inadequate. The method comprises the main processes of firstly adding calcium hydroxide into the wastewater, adjusting the pH to 8-9 so as to form calcium phosphate precipitates, adding sulfuric acid into a supernatant liquid so as to adjust the pH of the liquid to 4-5, then, adding a potassium ferrate liquid with strong oxidizing power so as to decomplex in a strong oxidizing manner and change complexed nickel ions into free-state nickel ions, then, adding calcium hydroxide, adjusting the pH to 10-11 so as to enable the free-state nickel ions to form precipitates to be removed from the wastewater, enabling trivalent ferric ions with excellent flocculation function generated after oxidation of ferric acid radical ions to have flocculation with hydroxide precipitates with an adsorption effect, and finally, adding polyacrylamide (PAM) to coagulate and precipitate, thereby removing nickel ions from the electroplating wastewater. The method has the advantages that the condition that the nickel ions obtained after the complexed chemical nickel electroplating wastewater is treated reach the national standards can be effectively guaranteed, the treatment efficiency is high, and the requirements on emission are met.

An iron-dextrin compound for treatment of iron deficiency anaemia comprising hydrogenated dextrin having a weight average molecular weight equal to or less than 3,000 Dalton and a number average molecular weight equal to or higher than 400 Daltons, in stable association with ferric oxyhydroxide. As the molecular weight of the dextrin must be narrow it is another important feature of the invention that the 10% fraction of the dextrins having the highest molecular weight has an average molecular weight of less than 4500 Daltons, and that 90% of the dextrins are having molecular weights of less than 3000 Daltons. It is further important that the 10% fraction having the lowest molecular weight has a weight average molecular weight of 340 Daltons or more.

Phosphate binding materials and compositions comprising them which are solid ligand-modified poly oxo-hydroxy metal ion materials are disclosed that are based on ferric iron oxo-hydroxides modified with carboxylic acid ligands, or ionized forms thereof. These materials are made and tested in the examples provided in the application to demonstrate that they can bind phosphate in in vitro and in in vivo studies.

The invention discloses a magnetic ferric oxide desulfurizer and a preparation method thereof. The preparation method comprises the following steps that 1, ferric oxyhydroxide, a binder and an auxiliary are mixed to be uniform, and a mixture I is obtained, wherein the auxiliary adopts coal ash and / or volcanic ash; 2, the mixture I, peptizer and water are mixed to be uniform, and a mixture II is obtained; 3, the mixture II is formed and dried; 4, baking is conducted on a dried forming composition, and the magnetic ferric oxide desulfurizer is obtained. The prepared magnetic ferric oxide desulfurizer has a porous structure and is high in mechanical strength and capable of making full contact with sulfur-containing gas, and the desulfurization efficiency is improved. Desulfurization can be conducted under the working conditions of room temperature to medium temperature, normal pressure to high pressure, high hydrogen sulfide content, high moisture content and different feed gases, in the desulfurization process, the strength of a desulfurizing agent is not reduced, argillation and hardening phenomena do not exist, and the high desulfurization activity is kept all the way.

The invention provides a preparation method of a visible-light-driven self-cleaning graphene oxide oil-water separation membrane. The preparation method comprises the following steps: S1, preparing aGO / TA composite membrane; and S2, loading iron oxyhydroxide on the GO / TA composite film prepared in the step S1 to prepare a GO / TA@FeOOH-x composite film. According to the preparation method of the visible-light-driven self-cleaning graphene oxide oil-water separation membrane provided by the invention, a stable ultrathin skin layer with a good oil-water separation effect is constructed on the surface of a PVDF membrane by utilizing the good film-forming property of the two-dimensional material graphene oxide, so that a stable graphene oxide oil-water separation membrane is formed; further, through a mineralization reaction of ferric ions in a ferric trichloride solution, ferric oxyhydroxide particles are loaded on a tannic acid modified graphene oxide sheet layer, therefore, the preparedvisible-light-driven self-cleaning graphene oxide oil-water separation membrane has good hydrophilic performance and underwater super-oleophobic wetting performance and also has excellent visible-light-driven self-cleaning capability.

The invention belongs to the technical field of water body purification, and discloses an activated carbon supporting ferric oxyhydroxide composite adsorbent, and preparation and application thereof.A preparation method includes the steps of: 1) acidifying the activated carbon, changing water to boil the activated carbon, washing the activated carbon, and changing water to boil the activated carbon, repeating the operations hereinabove until a filtrate is clear and transparent after the activated carbon is washed, and drying the activated carbon and calcining the activated carbon at high temperature to prepare pretreated activated carbon; 2) uniformly dispersing the pretreated activated carbon in a FeCl3 solution, sealing the mixture, performing an infiltration reaction, and washing and drying the product to prepare the activated carbon supporting ferric oxyhydroxide composite adsorbent. The method is simple and low-cost. In the composite adsorbent, the ferric oxyhydroxide is in a spindle-like shape and is uniformly supported on the activated carbon. The composite adsorbent is stable and can remove bromates in water high-effectively, is easy to recycle, and is used for removing the bromates in drinking water.

The invention relates to compound type desulfurization grout. According to the compound type desulfurization grout, ferric oxyhydroxide is added into a complex iron desulfurization solution, so that the desulfurization is carried out by virtue of a synergistic effect of the ferric oxyhydroxide and the complex iron desulfurization solution; compared with the prior art, the problem that the desulfurization cost is relatively high because the large amount of complexing solution is circularly used when a ferric complex singly taken as a desulfurization agent with the relatively low saturated sulfur capacity is used for removing H2S by virtue of a wet method is solved; the complex iron desulfurization solution is effectively mixed with the ferric oxyhydroxide, so that the characteristics of high desulfurization speed and desulfurization efficiency of the complex iron desulfurization solution are combined with the high-sulfur-capacity characteristic of the ferric oxyhydroxide, so that the relatively high desulphurization efficiency and the relatively high sulfur capacity are maintained, and the high-speed, high-efficiency and high-precision desulphurization is realized.

An iron-dextrin compound for treatment of iron deficiency anaemia comprising hydrogenated dextrin having a weight average molecular weight equal to or less than 3,000 Dalton and a number average molecular weight equal to or higher than 400 Daltons, in stable association with ferric oxyhydroxide. As the molecular weight of the dextrin must be narrow it is another important feature of the invention that the 10% fraction of the dextrins having the highest molecular weight has an average molecular weight of less than 4500 Daltons, and that 90% of the dextrins are having molecular weights of less than 3000 Daltons. It is further important that the 10% fraction having the lowest molecular weight has a weight average molecular weight of 340 Daltons or more.

The invention discloses a wet treatment method for ferronickel and application thereof; and the treatment method comprises the following steps of: in a high-pressure oxygen environment, mixing crushed ferronickel, sulphuric acid and a corrosion aid, performing acid leaching reaction, performing solid-liquid separation on slurry after acid leaching, adding an oxidizing agent into the obtained filtrate, performing heating, removing the corrosion aid, adding a precipitator into the filtrate, controlling the pH value of the filtrate, and performing solid-liquid separation to obtain ferric hydroxide precipitate and nickel-containing filtrate; and performing extraction and back extraction on the nickel-containing filtrate to prepare battery-grade nickel sulphate. According to the invention, the ferronickel is subjected to oxidation acid dissolution in cooperation with the corrosion aid under the high-pressure oxygen and acidic conditions; the ferronickel is extremely prone to oxidation in the high-pressure oxygen environment; and a strong oxidant is added into the filtrate subsequently, so that ferrous ions in the filtrate are completely converted into ferric ions, the corrosion aid can be oxidized to generate pollution-free carbon dioxide and water, and the influence of the corrosion aid on the subsequent extraction process is avoided.

The invention provides a nano-compound deodorant and a preparation method thereof. The nano-compound deodorant is prepared from the following raw materials in parts by weight: 15 to 45 parts of ferrichydroxide, 5 to 25 parts of nano calcium peroxide, 0.5 to 5 parts of surfactant, 1 to 6 parts of suspended powder, 3 to 7 parts of alum and 1 to 5 parts of dispersing agent. The nano-compound deodorant disclosed by the invention has quick penetrability to odorous volatile substances, in particular to volatile matters such as ammonia, fat and protein which produce hydrogen sulfide odorous substances; the nano-compound deodorant can quickly penetrate into the volatile substances for sterilization, so that odorous substances are fundamentally degraded; the nano-compound deodorant has the advantages of high interfacial activity, good migration activity, no toxicity, environment friendliness, no secondary pollution, stable property, no explosibility, no corrosion, no irritation, stable efficacy, long action time, capability of treating both symptoms and causes, safety use, easy operation, wide universality and rapid and obvious deodorant effect.

The invention discloses a hydrogenation method of coal tar. The method includes performing hydrogenation modification of the coal tar raw material, separating to remove water, and performing hydrofining and fractionation to obtain a gasoline fraction, a diesel oil fraction and a hydrogenation tail oil, wherein a catalyst applied in the hydrogenation modification process comprises ferric oxyhydroxide, organic polybasic carboxylic acid, macroporous alumina, molecular sieve and pseudo-boehmite. The inventive method adopting the hydrogenation modification catalyst with the low-cost ferric oxyhydroxide as an active metal component has low cost, and can realize moderate cracking and refining of the coal tar, effectively remove impurities in the coal tar, adjust product distribution and properties, and extend running cycle of a device.