92 results about "Ferrous Compounds" patented technology

A system and method for tooth whitening are disclosed wherein at least one peroxide-containing gel and at least one transition metal compound-containing gel, particularly at least one lower atomic number transition metal compound, more particularly at least a ferrous compound including gluconate, sulfate, nitrate, acetate or mixtures thereof, are applied to a patient's mouth. Gelling agent is also included. The activation of the peroxide whitens the patient's teeth. The system may be used with or without the application of light. The system further provides an additional gel including a sensitivity reduction compound including potassium nitrate, sodium nitrate or mixtures thereof for possible sensitivity treatment if needed.

The present invention is multifunctional sulfur recovering catalyst with high deoxygenation activity, high organic sulfur hydrolyzing activity and high H2S-SO2 Clausius reaction activity and its preparation process. The catalyst has active components including titania 40-60 wt%, active alumina 35-50 wt% and ferrous compound 5-10 wt%. The catalyst has the advantages of great specific surface area, high mechanical strength, high oxygen leakage poisoning tolerance, high deoxygenation activity, high organic sulfur hydrolyzing activity and high H2S-SO2 Clausius reaction activity. It may be used alone or via matching with common alumina catalyst.

The invention provides a ferrous aluminum and magnesium system refractory raw material which is a multiple solid solution or composite of ferrous aluminate spinel and/or alumina spinel and/or ferromagnesium solid solution and/or pleonaste. The refractory raw material is prepared by the following steps of: mixing a ferrous compound, an aluminum-containing compound and a magnesium oxide-containing compound according to the ratio; additionally adding 1-6 percent bonding agent; mixing, forming and drying a blank; maintaining the mixture in a high-temperature kiln in the nitrogen atmosphere at the temperature of 1,400-1,700DEG C for 2-8 hours; and naturally cooling and taking out the product. In the scheme, the granularities of the alumina-containing raw material and the ferrous raw material are less than 180 meshes. The invention aims at synthesizing the ferrous aluminum and magnesium system refractory raw material with stable performance and avoids the volume effect due to the change of ferrum among different valence states. The method has simple synthesis process and is easy to implement.

The invention relates to a method for making novel flavored preserved eggs, which comprises the following steps: dissolving carrageenin, soy protein, calcined soda, zinc compounds and ferrous compounds in water according to the proportion, evenly stirring, pouring into a fresh egg fluid, and adding table salt, monosodium glutamate, edible oil and tea dust; filtering, removing residues in the egg fluid, and standing at the temperature of 0-25 DEG C; pouring the evenly mixed fluid into a non-stick mold, and molding by adjusting the pH value (the pH value is 4-6 or 8-11) and the temperature (the temperature is 60-121 DEG C), thereby obtaining protein gel with favorable elasticity and hardness; taking the molded material out of the mold, and cutting into egg blocks with different shapes and sizes according to needs; vacuumizing and then packaging the produced material; sterilizing the vacuumized product with microwaves or high temperature; and cooling the sterilized product, attaching labels, printing codes and filling into boxes, thereby obtaining the finished product.

The invention provides a preparation method of a graphene filter composite membrane. The preparation method comprises the following steps of: filtering carboxylated graphene oxide to a membrane supporting layer by means of a suction filtration method or a cross flow filtration method to form a composite membrane supporting layer; and filtering a ferric chloride solution by using the formed composite membrane supporting layer, and performing reduction to form an electro-Fenton catalytic layer comprising a ferrous compound to prepare the graphene filter composite membrane. As the electro-Fenton catalytic layer comprises the ferrous compound which has a certain interception performance on refractory pollutants and can decompose the refractory pollutants in situ, the problem that the toxicity of the refractory pollutants cannot be reduced by means of a membrane technology is solved, and the membrane pollution is alleviated. Meanwhile, as the membrane supporting layer is arranged below the electro-Fenton catalytic layer, and in a process of filtering secondary effluent, the refractory pollutants can be enriched to a certain degree, so that the degrading rate of the electro-Fenton catalytic layer on the refractory pollutants can be further increased.

The invention relates to a method for preparing magnetic SBA-15, which comprises the following steps: 1) dissolving a ferrous compound in water by stirring under dark conditions, adding P123 and TEOS (tetraethyl orthosilicate), and stirring; 2) transferring the reaction product and mother solution into polytetrafluoroethylene to carry out hydrothermal crystallization; and 3) cooling, filtering, drying, and calcining to obtain the end product. In the method, the ferrous chloride water solution is an acidic solution, the P123 can be dissolved more quickly in the acidic solution, and the TEOS can be hydrolyzed under such acidic conditions; and therefore, no additional acid source in the public known technique is needed, so no acidic waste liquid can be generated.

The invention discloses a method for preparing potassium permanganate-doped potassium ferrate. The method comprises the following steps: firstly, mixing a ferrous compound and a stabilizer by the proportion of Fe and the stabilizer; secondly, dissolving the mixture in a potassium hydroxide solution; thirdly, stirring, adding an oxidizer to the potassium hydroxide solution by a certain proportion of Fe and the oxidizer at the temperature controlled within a certain range, reacting for a certain time, separating the purple suspended solid product prepared from the reaction, decompressing and filtering; fourthly, mixing the purple solid product with the mixed solution of potassium hydroxide and potassium permanganate in a certain proportion, stirring and separating the purple solid to obtain the purple solid product; and fifthly, rinsing the purple solid product with cyclohexane, absolute alcohol and ether respectively, decompressing and filtering, and vacuum drying until the weight is constant to obtain the potassium ferrate solid. The invention has the advantages that the purity of synthesis is high, the thermal stability of the synthesis is high, the purity of potassium ferrate is higher than 98%, the content of the potassium ferrate is higher than 96%; the obtained potassium ferrate has good electrochemical performance; and the conservation rate of the charge/discharge cycle discharge capacity is up to 90.5%.

A system and method for tooth whitening are disclosed wherein at least one peroxide-containing gel and at least one transition metal compound- containing gel, particularly at least one lower atomic number transition metal compound, more particularly at least a ferrous compound including gluconate, sulfate, nitrate, acetate or mixtures thereof, are applied to a patient's mouth. Gelling agent is also included. The activation of the peroxide whitens the patient's teeth. The system may be used with or without the application of light. The system further provides an additional gel including a sensitivity reduction compound including potassium nitrate, sodium nitrate or mixtures thereof for possible sensitivity treatment if needed.

The invention relates to a preparation method for a ferrous silicate lithium cathode material simultaneously doped with fluorine and zirconium, which is characterized by comprising the following steps of: weighing a lithium compound, a ferrous compound, a zirconium compound, a silicon compound and a fluorine compound as reactants in accordance with the molar ratio of lithium ion to ferrous ion to zirconium ion to silicon ion to fluorine ion being (1.90-2.05): (1-y): x: (1-z): k; weighing a carbon-containing compound or carbon powder based on 1-30 percent of total mass of the reactants; mixing the silicon compound with hot water, adding the lithium compound, then mixing all other reactants and the carbon-containing compound or the carbon powder, carrying out ball mill mixture process and vacuum drying to prepare dry powder; and placing the dry powder in an inert atmosphere or a weakly reducing atmosphere, and then preparing ferrous silicate lithium through the two-stage sintering process. The cycle performance of the prepared material is excellent in the 1C-rate current, and a good foundation can be built for industrialization.