39results about How to "Increase the specific surface area of ​​the reaction" patented technology

The invention discloses a method for treating heavy metal wastewater. The method is characterized in that argillaceous dolomite ore is crushed and screened to obtain 0.5-2 mm particulate matter, a filter chamber or a filter column is filled with the particulate matter and / or a high-temperature calcination product thereof, and the heavy metal wastewater is treated in a filtered mode. As argillaceous dolomite is composed of nanometer mineral attapulgite and dolomite and has a natural nanometer porous structure characteristic, a water-mineral interface reaction occurs in particles, the nanometer dolomite induces heavy metal hydrolysis to form hydroxide or subcarbonate precipitation, the nanometer rodlike attapulgite has adsorption and condensation effects on the hydrolyzed colloidal particles, and the pH value and the heavy metal content of the treated wastewater reach the emission standard; heavy metal waste obtained after treatment can be used for metal recovery, or be converted into stable silicate by means of thermotechnical treatment at the temperature of 500 DEG C-700 DEG C.

The invention discloses a preparation method of a ferric-carbon internal electrolysis filler; the preparation method comprises the steps of taking cold-rolled oil sludge and pulverized coal as raw materials, mixing the raw materials evenly, then carrying out dry distillation under the protection of inert gas to obtain iron-doped activated carbon, and thus obtaining the ferric-carbon internal electrolysis filler. The iron and steel industry common pulverized coal and cold-rolled oil sludge are sintered into iron-containing activated carbon particles comprising micron-sized iron and reduced iron components, and a pore forming phenomenon appears in ferric-carbon internal electrolysis filler particles, so that the reaction efficiency of a primary battery is improved and the cost is low.

The invention relates to a method for preparing a conductive polymer based electromagnetic composite material. The method comprises the following steps of: respectively preparing magnetic powder suspending liquid, monomer dispersion liquid and an initiator solution, filling the magnetic powder suspending liquid, the monomer dispersion liquid and the initiator solution into three injectors, and continuously injecting the magnetic powder suspending liquid, the monomer dispersion liquid and the initiator solution into respective microtubules at a constant pushing speed respectively; mixing the reaction solutions in a reaction tube after the reaction solutions flow through the microtubules, and performing fluid reaction polymerization at room temperature under ultrasound assistance; and performing magnetic separation, washing, and freeze-drying on the product to obtain the conductive polymer based electromagnetic composite material. The method is simple, low in energy consumption, good in repeatability, capable of realizing continuous and fast preparation of the product, and easy to realize industrial production; and the prepared conductive polymer based electromagnetic composite material is uniform in particle size, large in specific area, stable in physical and chemical properties, difficult to agglomerate, good in dispersity and excellent in electromagnetic comprehensive performance, and has a good application prospect.

The invention belongs to the technical field of polyurethane, and in particular relates to a rigid polyisocyanurate node material for thermal insulation of a deep-sea transmission pipeline interface and a preparation method thereof. The rigid polyisocyanurate node material for thermal insulation of the interface of the deep-sea transmission pipeline is composed of the A component and the B component in a mixed mass ratio of 1:1.3-1.7, and the A component is composed of polyether polyol A, poly Ether polyol B, polyester polyol C, foam stabilizer, catalyst, flame retardant, sodium silicate aqueous solution; B component is isocyanate and prepolymer mixed according to (50-80): (20-50); Polyether polyol A is a special polyether polyol with a hydroxyl value of 425±3 mgKOH / g. The rigid polyisocyanurate node material for thermal insulation of a deep-sea transmission pipeline interface of the present invention has low foam heat, high porosity, high compressive strength and good flame retardancy; the invention also provides a preparation method thereof.

The invention discloses a method for preparing para-aramid fibers by spraying method. By using p-phenylenediamine and terephthaloyl chloride as monomers and nitrogen methyl pyrrolidone as solvents, the monomers are dissolved in an inert gas environment. The dispersed phase is formed through spray gun atomization, and the mist clusters collide to quickly undergo polycondensation reaction, and the product is directly sprayed on the material panel, and after high-temperature drying, an aramid coating is formed in one step. During the reaction process, the atomization state is used to increase the contact specific surface area of ​​the reactants, so as to realize the rapid removal of reaction heat and improve the process safety. The invention realizes rapid removal of reaction heat in the aramid fiber polymerization process, the production process is safe and controllable, and the thermal insulation coating material can be manufactured more efficiently.

The invention provides a ceftiofur ester type compound or halogen salt thereof as well as a preparation method and application of the ceftiofur ester type compound or the halogen salt thereof. The ceftiofur or sodium salt thereof takes anion exchange resin as a reaction carrier, and an esterification reagent, such as chloro(iodo)methyl pivalate, 1-iodoethyl isopropyl carbonate, 1-iodoethyl cyclohexyl carbonate, methoxyethoxychloromethyl ether, 4-chloromethyl-5-1,3-dioxole-2-one, 1-iodoethyl cyclohexyl carbonate, 2-chlorotriethylamine and hydrochloride thereof, is added into an organic solvent;then ultrasonic reaction is carried out to prepare an ester type compound corresponding to the ceftiofur; furthermore, the halogen salt of the ceftiofur is prepared. In a preparation process, DMF (Dimethyl Formamide) is not used so that the pollution is reduced; the anion exchange resin is used as the reaction carrier so that the reaction speed is improved, a technology is saved and the preparation method is simple.

The invention discloses a method for realizing efficient co-production of malt syrup and rice protein by adopting rice processing by-products. Broken rice and rice bran are adopted as the raw materials. The method comprises the following processing steps: (1) carrying out mechanical pretreatment; (2) carrying out ultrasonic treatment; (3) carrying out mild biological activating; (4) carrying out degreasing pretreatment; (5) carrying out hydrolysis and liquefying by adopting alpha-amylase; (6) carrying out separating, namely, carrying out centrifugalizing on the liquefied liquid obtained in the step (3) at 3200r / min, thus obtaining the supernate and sediment; (7) preparing broken rice and rice brain protein; (8) carrying out modified treatment on saccharifying enzyme; and (9) preparing the broken rice and rice bran malt syrup. With the adoption of the method provided by the invention, the malt syrup and rice protein by-products with good quality can be prepared, and the utilization value of the rice processing by-products is favorably improved.