108 results about "Letovicite" patented technology

The invention discloses a pyrophillite lost foam casting coating and a preparation method thereof. The coating comprises the following components by the mass percentage: 90% to 95.8% of pyrophillite refractory powder, 0.2% to 0.7% of sodium carboxymethyl cellulose, 1.9% to 4.4% of swell soil, 1.9% to 5.3% of soluble glass, 0.1% to 0.18% of polyethylene alkyl polyol ether, and 0.05% to 0.1% of N-octanol, and the mass percentage of the components is 100% in total, wherein, pyrophillite refractory powder is pyrophillite or mixture of pyrophillite and other refractory materials. The invention has the advantages that the pyrophillite lost foam casting coating has favorable suspension property and thixotropy, as well as excellent ventilation property and relatively high surface strength; and the preparation technology is simple, the operation is convenient, the raw material is abundant and the production cost is low. The invention is mainly used for producing refractory material on the surface of foam plastic mould of lost foam pieces.

The invention discloses a preparation method of a catalyst for synthesis of aniline through catalytic hydrogenation of nitrobenzene. The catalyst is obtained through loading nickel into bentonite. The catalyst is prepared by taking the sodium bentonite as the raw material and is prepared into a suspension liquid, the nickel nitrate solution is added into the suspension liquid, the sodium hydroxide or ammonium hydroxide or sodium carbonate is taken as the precipitator to enable the nickel to form hydroxide and load the hydroxide on the bentonite. The suspension liquid and the precipitate are filtered, dried at the temperature of 80 DEG C for 10 hours, and roasted at the temperature of 250 DEG C to 450 DEG C for 2 hours, to obtain the Ni-loaded bentonite catalyst with the content of Ni being 0.001-0.010mol / g in the bentonite. After being reduced through a reducing agent, the catalyst shows excellent activity in the synthesis of aniline through catalytic hydrogenation of nitrobenzene in a fixed bed reactor, and the recycling service life of the catalyst is relatively long.

The invention discloses low-silicon magnesium-containing pellets and a production method thereof. The method comprises the following steps of: proportioning 95 to 98.5 mass percent of low-silicon ore concentrate powder, 1 to 4 mass percent of magnesium-containing additive and 0.5 to 1.0 mass percent of binder, uniformly mixing the low-silicon ore concentrate powder, the magnesium-containing additive and the binder by using a blender mixer, adding an appropriate amount of water and controlling the water content of the mixture to be between 7.0 and 8.5 percent, wherein the magnesium-containing additive can be selected from magnesia powder, caustic calcined dolomite, dolomite, olivine and boric sludge and the binder can be selected from bentonite or a composite binder; pelletizing the mixture in a pan pelletizer, forming a mother pellet, adding materials and water gradually to allow the mother pellet to grow bigger and denser, screening green pellets of between 9 and 16 millimeters and performing a continuous roasting process consisting of drying, preheating, roasting and cooling; drying the pellets at the temperature of between 200 and 450 DEG C for 8 to 10 minutes, preheating the pellets at the temperature of between 700 and 1,050 DEG C for 10 to 15 minutes and roasting the preheated pellets at the high temperature of between 1,280 and 1,350 DEG C for 12 to 18 minutes; and cooling the roasted pellets to be less than 100 DEG C after roasting is finished so as to obtain the low-silicon magnesium-containing pellets serving as finished products.

The invention relates to a method of processing industry waste acid liquid and preparing desiccant with dolomite attapulgite clay, which is characterized in that: according to a volume mass ratio of the waste acid liquid and the dolomite attapulgite clay of 0.4 to 1 L / kg, the dolomite attapulgite clay powder is added in the waste acid liquid; a neutralization reaction occurs between the dolomite in the clay and the waste acid liquid, thereby the pH value of reacted mixture is more than 3, and the water content of the mixture is controlled; an attapulgite clay compound desiccant is obtained after the hydrous mixture is molded and calcined; the industry waste liquid acid comprises acid waste liquid produced by active clay, the acid waste liquid of active silicon dioxide which adopts attapulgite clay or swell soil and hydrochloric acid or sulphuric acid as raw material, etc. The invention not only processes and utilizes the attapulgite clay or swell soil to process the acid waste liquid and realizes the zero draining of the waste water, but also saves materials such as calcium chloride and caking agent, etc. which are required in the preparation of the attapulgite clay desiccant, thereby greatly reducing the production cost of the attapulgite clay compound desiccant.

The invention discloses particles containing sodium fatty acid methyl ester sulfonate and a preparation method thereof. The preparation method comprises the following steps: mixing a wrapper and 20-75 parts by weight of paste sodium fatty acid methyl ester sulfonate, granulating by a wet process, drying, and screening. The wrapper is a composition comprising the following components in parts by weight: 1-40 parts of zeolite, 1-40 parts of silicate, 1-30 parts of modified starch and 0-30 parts of bentonite. The mass percent of the sodium fatty acid methyl ester sulfonate in the particles containing sodium fatty acid methyl ester sulfonate can be up to 65%; the particles containing sodium fatty acid methyl ester sulfonate can be used as a raw material for preparing washing powder or directly used as a detergent; and the invention effectively solves the problems of poor stability, high decomposition tendency, high lumping tendency, poor low-temperature solubility and the like in the use process of sodium fatty acid methyl ester sulfonate.

A method for treating industrial waste acid liquid containing dolomite attapulgite clay and preparing a desiccant, characterized in that the volume-to-mass ratio of waste acid liquid to dolomite attapulgite clay is 0.4 to 1 L / kg, adding Dolomite-containing attapulgite clay powder, the dolomite in the clay reacts with the waste acid solution, so that the pH of the mixture is greater than 3 after the reaction, and the water content of the mixture is controlled; the wet mixture containing water is formed and calcined to obtain attapulgite clay Composite desiccant; industrial waste acid liquid includes acid waste liquid produced from activated clay, acid waste liquid produced from attapulgite clay or bentonite and hydrochloric acid or sulfuric acid as raw materials to produce active silica, etc. The present invention not only treats and utilizes attapulgite clay or bentonite processing acid waste liquid, realizes zero discharge of waste water, but also saves raw materials such as calcium chloride and binder required for the preparation of common attapulgite clay desiccants, making the The production cost of the attapulgite clay composite desiccant is greatly reduced.

The invention discloses an acidified bentonite. The technical scheme is as follows: the acidified bentonite is composed of bentonite, sulfuric acid, instant sodium silicate, polyvinyl alcohol, hydroxypropyl methylcellulose and sodium carbonate. The production method of the acidified bentonite comprises the following steps: inputting acidified bentonite materials into a mill, and milling into powder, thereby obtaining the acidified bentonite. The composite proportioning is performed after acidification, thereby avoiding the chemical reaction between the sulfuric acid and the instant sodium silicate, polyvinyl alcohol, hydroxypropyl methylcellulose and sodium carbonate, fully displaying the respective characteristics of the raw materials in the formula, and ensuring the inherent quality of the acidified bentonite. The acidified bentonite has favorable adsorbability, high-temperature stability and lubricating property, and the water absorptivity, colloid index, plasticity, expansion coefficient, colloid viscosity and thixotropy are greatly enhanced. The acidified bentonite is suitable for producing products in the fields of paints, aviation, metallurgy, chemical fibers, petroleum, firefighting and the like.

The invention relates to a method for improving the dye waste water adsorptivity of hydroxyl iron pillared bentonite, comprising the following steps of: firstly, acting hydroxyl iron pillared bentonite powder prepared by adopting a traditional method under a magnetic field with the intensity of 3000-4000 gausses for 40-80 minutes; secondly, simultaneously adding the obtained hydroxyl iron pillared bentonite powder acted by the magnetic field and sodium chloride into dye wastewater for treatment, wherein 0.5-1mol of sodium chloride and 1-5g of the hydroxyl iron pillared bentonite powder acted by the magnetic field are added into each liter of dye wastewater; and finally, stirring for 15-30 minutes, precipitating and separating. The adsorbing capacity of the hydroxyl iron pillared bentonite on the dye is improved and the treatment efficiency of the dye wastewater is improved.

The invention provides a resource utilization method for inorganic wastes. The treatment of waste sulfuric acid and depth processing of bentonite rich in christobalite are combined in a circular economy approach; a characteristic of easiness to conducting a precipitation reaction with sulfuric acid of the bentonite alkaline extraction waste liquid (with a main component of a sodium silicate dilute solution) rich in christobalite is fully utilized to prepare white carbon black through a precipitation reaction, and a mother liquor obtained from the precipitation reaction is further utilized to prepare sodium sulfate. The technology of the invention is easy, practical and with high economic benefits, solves an environmental pollution problem caused by waste sulfuric acid and bentonite alkaline extraction waste liquid rich in christobalite and also produces two products of white carbon black and sodium sulfate with excellent product performances, wherein a white carbon black purity is higher than 99%, and a sodium sulfate purity is higher than 99.5%. The invention realizes waste resource exploitation and utilization with high efficiency, low costs and high added value.