258 results about "Peptization" patented technology

The invention discloses architectural ceramic prepared from industrial solid waste through a dry method and a process for preparing the architectural ceramic. The architectural ceramic comprises the following components in percentage by mass: 30-60% of solid waste, 40-70% of ceramic raw material and 1-3% of ceramic additive, wherein the ceramic raw material is selected from one or a composition of multiple of clay raw material, feldspar raw material or talc, and the ceramic additive is one or a combination of multiple of sodium tripolyphosphate, sodium silicate, ammonium chloride, ammonium citrate, sodium humate, sodium lignin sulfonate sodium, ethylenediamine tetraacetic acid disodium and edetic acid. After being pretreated, the granules of the solid waste are fine and are mixed evenly in a dry mixing manner and a spray drying manner and are directly used for pressing of green bricks or stored in a bin for standby, so that the ball milling energy consumption and the peptization cost are reduced, the humidification pelleting and fluidized bed drying procedures are omitted, the formula can be quickly adjusted according to the functional characteristics of the architectural ceramic, the process is simple and convenient to control, and the architectural ceramic has such good properties as heat preservation, thermal insulation and high strength.

A method for preparing a neutral, stable and transparent photocatalytic titanium dioxide sol is provided. The method comprises (1) contacting an alkaline titanium dioxide sol with an alkaline peptizing agent to provide a peptized alkaline titanium dioxide sol; (2) neutralizing the peptized alkaline titanium dioxide sol; and (3) obtaining or collecting the neutral, stable and transparent photocatalytic titanium dioxide sol. The titanium dioxide sol is stable and transparent over a range of pH of about 7.0 to about 9.5. The titanium dioxide sol may include crystallites of titanium dioxide having an average particle size of less than about 10 nm with at least 90% of the crystallites being in the anatase form.

The invention discloses a petroleum wax hydrogenation catalyst and its preparing method, adopting the Si- and P- containing aluminum hydroxide prepared by CO2 netur neutralization process to act as a carrier material of catalyst, where the Si and P auxiliaries are added in steps, some Si- and P- containing compounds mix with sodium meta-aluminate solution to form a glue, some Si-containing compounds are added after the glue is formed or in the ageing process, and most P-containing compounds are added in the process of peptizing or pulping the produced aluminum hydroxide after washed, thus making most Si and P are distributed on the surface of aluminum hydroxide, effectively give full play to the Si and P cooperatively regulating surface physico-chemical property and hole structure of the catalyst. Its preparing process is simple and low-cost. It has good activity and selectivity as processing petroleum waxes including high-melting point petroleum wax.

The invention discloses a microspherical ethylene oxychlorination catalyst preparation method, which comprises the following six steps: solution preparation; precipitation and reaction; peptization; active component and assistant component homogenization; spray forming; and post-treatment. Solution of an active component and solution of an assistant component are dissolved in peptized pulp; a proper amount of dispersant and pore-expanding agent are added into the pulped sol solution to ensure the active component and the assistant component are uniformly distributed in the sol solution; the dispersant can prevent active and assistant component deposition caused by the prolongation of spray time; and the added proper amount of pore expanding agent can expand formed pore passage with a microspherical structure in a spraying process of the sol solution so as to improve the volume of the pore passage of a catalyst carrier and improve the pore volume and specific area of the catalyst.

The invention discloses a method for preparing a hydro-demetalization catalyst, which comprises the following steps of: (1) weighing two kinds of pseudoboehmite dry colloidal powder with different natures, evenly mixing, adding an extrusion aid, then, carrying out peptization, forming, drying, and roasting to prepare an alumina carrier; (2) preparing a dipping solution from a VIB metallic compound and/or a VIII metallic compound; and (3) dipping the alumina carrier prepared in the step (1) by using the dipping solution prepared in the step (2), drying an obtained wet catalyst, and then, roasting the catalyst in water-vapor-contained atmosphere to prepare the final catalyst. With the adoption of the method disclosed by the invention, the hydro-demetalization catalyst with a large pore diameter, large pore volume and concentrated pore distribution can be prepared under the condition of not using a pore-expanding agent.

The invention relates to a catalyst for directly preparing a low-carbon olefin from a microspherical synthesis gas, and is mainly used for solving the problems that the existing co-precipitation Fischer-Tropsch catalyst preparation technology comprises the following steps: firstly co-precipitating and then pulping and spray-forming, so that the slurry is substantially a non-homogenous body dispersed by adopting a physical method, the finial catalyst finished product is uneven and the hydrocarbon products on the catalyst are widely distributed. The problems are well solved by adopting the technical scheme that the preparation method comprises the following steps: firstly precipitating a part of components, then carrying out peptization on the obtained precipitates by using the salt solution of non-precipitated components to obtain chemically evenly dispersed sol, then spray-drying the sol, and then roasting at high temperature. The preparation method can be used for industrial production for a catalyst for synthesizing the low-carbon olefin from the synthesis gas. The catalyst is applicable to but not limited to such reactors as a fluidized bed and a slurry-state bed in which catalyst grains are required to be distributed according to the certain distribution rule.

This invention relates to a process of preparing a catalyst from zeolite and peptized alumina. The invention comprises adding a yttrium compound to the zeolite, either prior to, during, or after its combination with the peptized alumina. The yttrium compound can be added to the zeolite via exchange of yttrium onto the zeolite prior to addition of peptized alumina, or the yttrium can be added as a soluble salt during the combination of the zeolite and peptized alumina. In either embodiment, the zeolite catalyst is then formed from the zeolite, yttrium and peptized alumina, optionally containing other inorganic oxide. This invention is suitable for preparing fluid cracking catalysts.

The invention relates to a preparation method for an alumina coat on quartz fibre surfaces, and belongs to the technical field of special functional ceramics. The preparation method comprises the following steps: respectively adding aluminum ion, nitric acid and chelating agent in solvent according to the molar ratio of 1: (0.03-0.28): (0.5-1) till all the materials are hydrolyzed to generate sediments; then, adding peptizator to carry out peptization; carrying out reflux heating and stirring for 8 to 24h at a temperature of between 50 and 100 DEG C to obtain transparent and stable Al2O3 sol; putting quartz fibre into a steeping vat of Al2O3 sol for steeping and then heating up and gradually drying the quartz fibre at a temperature of between room temperature and 80 DEG C; and finally, carrying out heat treatment at a temperature of between 450 and 850 DEG C to obtain the quartz fibre coated with the alumina coat. The preparation method is scientific, reasonable and easy to implement; moreover, the Al2O3 coat coated on the surface of the quartz fibre increases material mechanical property and reduces material brittle fracture.

A microspherical medium of ferromagnetic urea-formaldehyde resin is composed of the urea-formaldehyde resin with 0.5-20 microns of granularity and uniformly dispersed Fe3O4 nanoparticles (0.1-200 nm). Its preparing process includes preparing magnetic fluid, preparing its sol, separating and preparing magnetic microspheres. Its advantages are simple and easily controllable process and high stability.

The invention relates to a pretreatment method for chemical plating electric conducting and magnetic conducting glass fibre, which has the characteristics that: alkali-free glass fiber undergoes ultrasonic dispersion and cleaning, is washed by stilled water and then undergoes dispersion treatment, roughening treatment, coupling treatment, sensitizing and activating treatment, peptization treatment and oven drying treatment. The method has the advantages that: firstly, the self-made activator is adopted to complete the sensitizing and activating in one step and has the effect better than the two-step method, thereby optimizing the pretreatment process; secondly, the combined coupling agent is used to strengthen the glass fibre and the chemical adsorption capacity of Pa <2+> in the activator, thereby the coating has good combination property.

The invention provides silicon-modified alumina, as well as a preparation method and application thereof. Alumina modified by silicon sol comprises the following steps of (1) acidifying and peptizing pseudo-boehmite slurry with inorganic acid to obtain pseudo-boehmite sol; (2) adding silica sol into the pseudo-boehmite sol to obtain a first mixture; (3) regulating the pH value of the first mixture in a range that the pH is 1 to 11 according to different requirements for the content of surface bronsted acid and pore volume improvement degree of alumina, and conducting a reaction for a period of time under a heating condition to obtain a second mixture; (4) crystallizing the second mixture to obtain a third mixture; and (5) filtering, washing, drying and roasting the third mixture to obtain the silicon-modified alumina. Flexible conversion between emphasizing pore volume improvement and bronsted acid content improvement can be realized by regulating the pH value of the first mixture, so that the method has a wide application prospect.

The invention relates to a method for synthesizing anatase phase titanium dioxide nanometer particle by a microreactor, comprising the following steps: (1) titaniferous inorganic substance is confected into water solution, and is heated, and inorganic alkali solution is added; (2) after precipitate is washed with water, the clean precipitate is put into perhydrol liquid, is stirred and is scattered with ultrasound, the temperature is preserved for 12-24h after rising, and peptization is carried out to obtain potassium peroxytitanate solution or collosol; (3) after diluted with polyalcohol, the potassium peroxytitanate solution or the collosol is injected into the microreactor to be treated with oil bath to obtain titanium dioxide collosol; (4) the collosol is mixed with acetone, titanium dioxide colloid particles are performed with precipitation and decentralization to obtain light white titanium dioxide powder bodies. The invention has simple technology and short reaction time and is suitable for industrialized production; the obtained titanium dioxide collosol has the characteristics of small particle, even distribution, favourable crystallinity, favourable stability, high transparency and the like.

The invention discloses a technology for preparing pseudo-boehmite by a sodium bicarbonate neutralization method, which comprises steps: using NaHCO3 solution and sodium aluminate solution to carry out acid-alkali neutralizing reaction so as to prepare pseudo-boehmite; and after neutralizing reaction, separating, ageing, washing, drying and grinding material to prepare pseudo-boehmite. As reactionmother solution does not contain acid radical ions, processes and devices are not corroded, and simultaneously CO2 gas is pumped into mother solution for depth carbonization to form NaHCO3 solution,and neutralization reaction can be conducted repeatedly, thus fully using production raw material and reducing production cost. The pseudo-boehmite prepared by the technology has good peptization property, fast peptization speed, high peptization rate, low peptization viscosity, concentrated product pore diameter distribution, good caking property and wide application in oil refining, petroleum and chemical industries, environmental protection and chemical fertilizer catalytic agent manufacture.

The invention relates to the technical field of white spirit processing, especially to a multi-koji five-grain highly-flavored white spirit and a preparation method thereof. According to the present invention, four grains such as sorghum, glutinous rice, rice, corn and wheat are adopted as raw materials to mix so as to prepare the four-grain highly-flavored white spirit, wherein the prepared highly-flavored white spirit has characteristics of rich nutrients, excellent taste, sweet aftertaste after drinking, and fragrant and soft odor; raw material treatment, steaming gelatinization, spread cooling-koji stirring, boxing-saccharification, lees preparing-pitting, pit sealing-fermentation, pit exposing-distillation, warehousing storage and other process steps are combined so as to carry out complete peptization on the raw materials such as sorghum, the glutinous rice, the rice and the corn, such that the starch can be completely exposed; and with the steaming gelatinization step, the raw materials can be cooked and do not stick in hand, and it is ensured that the raw materials have no raw core so as to increase the highly-flavored white spirit yield and improve the highly-flavored white spirit quality.

The invention relates to the technical field of polyacrylamide gel, in particular to a polyacrylamide gel peptization instant solid composite and a preparing method thereof. The composite comprises a monomer which is capable of achieving free radical polymerization and contains acrylamide, a monomer capable of achieving crosslinking, a gel making buffer agent, a pH regulator and a solid forming auxiliary material. The peptization instant solid composite is prepared by mixing the solid forming auxiliary material with a polyacrylamide gel making reagent. In use, polyacrylamide gel can be obtained simply by dissolving the polyacrylamide gel peptization instant solid composite in water as needed, operation is easy and convenient, polyacrylamide gel preparing time is saved greatly, property and performance are stable, storage is convenient, and retention cycle is long; meanwhile, tablets are easy to prepare, dosage is accurate, and bulk production can be conducted to enable the polyacrylamide gel to be more stable and reliable, batch difference to be smaller, repeatability to be higher and cost to be lower.

A method for producing a cobalt on alumina catalyst is disclosed. The catalyst is prepared by thoroughly mixing cobalt nitrate into a peptized alumina slurry, and then spray-drying the slurry to form attrition resistant microspheres. The cobalt prepared by this invention is fully reducible. Optionally, metals such as ruthenium can be added to the cobalt/alumina catalyst by impregnation or methods known in the prior art.

The invention provides a B acid-enriched mesoporous alumina, as well as a preparation method and application thereof. The preparation method of the B acid-enriched mesoporous alumina comprises the following steps: (1) acidifying and peptizing pseudo-boehmite slurry by using an inorganic acid solution to obtain pseudo-boehmite sol; (2) adding an aqueous solution of an acidic modifying agent into the pseudo-boehmite sol and then adding an aqueous solution of a pore-enlarging agent to obtain a first mixture; (3) performing a reaction on the first mixture for a period of time under the heating condition, and after the reaction, sequentially cooling, adjusting the pH value to 9 to 11 and ageing to obtain a second mixture; (4) directly drying the second mixture at 60 to 110 DEG C for 12 to 24 hours without filtering and washing the second mixture, and roasting at 500 to 700 DEG C for 4 to 8 hours to prepare the B acid-enriched mesoporous alumina. The B acid-enriched mesoporous alumina provided by the invention has the characteristics of high B/L ratio, high pore volume and large aperture.

The invention relates to the technical field of ultraviolet curing adhesive, in particular to a hydrolysable ultraviolet curing adhesive and a method for preparing the same. The curing adhesive comprises the following components in part by weight: 30 to 70 parts of prepolymer, 15 to 60 parts of reactive diluent, 0 to 10 parts of coupling agent, 1 to 10 parts of photoinitiator and 0.1 to 2.5 parts of auxiliary agent, wherein the prepolymer has a unique structural formula. The preparation method comprises the following steps of: performing vacuum dehydration on the reactive diluent at the temperature of between 110 and 120 DEG C for 1 to 2 hours; cooling the reactive diluents; adding the prepolymer, the coupling agent and the photoinitiator into the reactive diluents when the temperature is reduced to the room temperature; stirring the mixture for dissolution; and finally adding the auxiliary agent. The ultraviolet curing adhesive is high in fluidity, easy to coat and quick in curing, the curing matters have the characteristics of hardness, crispness and low shrinkage ratio, and the curing adhesive is suitable for mechanical processing; and the curing adhesive is high in water adsorption, susceptible to peptization in water, low in cost and wide in application range. The preparation method is characterized by simple synthetic reaction process, and is easy to operate.

The invention discloses an environment-friendly water-based metal machining liquid containing a nano lubricant additive and a preparation method thereof. The composition comprises peptized nano silicon dioxide, polyethylene glycol, diethanolamine boride, benzotriazole and deionized water. The composition does not contain substances such as sodium nitrite, phenol, a chlorine extreme pressure agent, a sulfur extreme pressure agent and a phosphorus extreme pressure agent, accords with the environment-friendly requirement, and has superior lubrification due to introduction of nano silicon oxide.