39results about How to "Reaction control is easy" patented technology

The invention discloses a gypsum drying and calcining machine which is characterized by comprising a drying part mechanism and a calcining part mechanism, wherein the drying part mechanism comprises a drying shell capable of being arranged rotatably, a plurality of lifting plates which can rotate along with the shell to drive materials to move forwards are obliquely arranged on the inner wall of the drying shell, a feeding mechanism is arranged at a feed end of the drying shell, and a heating air feed pipe for drying is arranged consequently in the drying shell; the calcining part mechanism comprises a calcining shell capable of being arranged rotatably, and a heating air feed pipe for calcining is arranged at a discharge end of the calcining shell; a vertically-arranged exhaust funnel is arranged between the discharge end of the drying shell and the feed end of the calcining shell, and an intermediate powder discharge shuttle tank and a rotatable transition shuttle tank are arranged in the exhaust funnel. The gypsum drying and calcining machine disclosed by the invention has the advantages of simple structure, capability of ensuring precise control of the reaction process and improving the reaction treatment effect, and capability of obtaining intermediate treatment product powder and higher product powder purity.

The purpose of the present invention is to provide: a method for obtaining hydrogen or deuterium with high efficiency or hydrogenating or deuterating an organic compound; a device for use in the method; and others. Provided are: a method for producing hydrogen or deuterium by subjecting water or heavy water to a mechanochemical reaction in the presence of a catalyst metal, said method being characterized in that such an energy density that the speed of acceleration generated by rotating is 75 G or more is applied to water or heavy water for 25 minutes or longer; a method for producing a hydrogenated or deuterated organic compound; a method for hydrogenating or deuterating an organic compound; a method for dehalogenating an organic compound having a halogen; and a ball for use in a mechanochemical reaction.

The invention provides a synthesizing method of a hydroxyl-terminated liquid fluorine rubber modified polyurethane material with gradient modulus. The method comprises the steps that 1, polyether diol with a low molecular weight, hydroxyl-terminated liquid fluorine rubber and aromatic diisocyanate serve as the raw materials to synthesize an isocyanate-terminated modified polyurethane prepolymer; 2, the product in the first step is mixed with different mole ratios of aromatic diisocyanate, a cyclotrimerization reaction is conducted in a solvent in the ontological status, and the hydroxyl-terminated liquid fluorine rubber modified polyurethane material with the gradient modulus is obtained finally. The synthesizing method has the advantages that the reaction system is low in viscosity, and synthesis of the isocyanate-terminated polyurethane prepolymer is promoted; the method is novel, the reaction is easy to control, and the product is good and stable in quality. The obtained polyurethane material with the gradient modulus is good in toughness, temperature resistance and chemical medium resistance, and the elasticity modulus has gradualness along with changes of temperature.

The invention relates to a method for synthesizing progesterone midbody 3beta-hydroxy-5-pregnene-20-ketone. By the method, a refining procedure and a by-product oxidation recovery processing procedure of a traditional synthesizing process are saved. The obtained midbody does not need to be refined, the once quality yield is more than 86%, and the product purity is more than 99.0%.

The invention discloses a lithium battery cathode material precursor with a mesoscopic structure and a preparation method thereof. The method comprises the following steps: (1) one-step co-synthesis: mixing the lithium salt solution and the nickel-cobalt-manganese mixed solution, adjusting the pH value to 5.5-7.5 through a carbon dioxide-lithium hydroxide buffer system, and stirring for 2-5 hours; (2 ) Two-step co-synthesis: Concentrate the product obtained in step (1) until the volume is reduced by 1 / 2 to 2 / 3, pass through protective gas to maintain the pressure at 1.01 to 10.0 MPa, and then perform solid-liquid separation after aging for 5 to 24 hours , to collect the solid phase product; (3) pyrolyze the solid phase product in a vacuum, and then dry it at 90-130°C. The reaction process of the present invention does not require an external complexing agent, and a nano-scale, independent lithium-nickel-cobalt-manganese quaternary precursor spherical particle with a mesoscopic structure can be prepared, which simplifies reaction control and reduces production costs.

The invention relates to the field of organic polymer chemistry, and specifically relates to a siloxane copolymer containing ethyl phenyl silica chain links and a preparation method thereof. The preparation method comprises the following steps: taking ethyl phenyl dialkoxysilane and dimethyl dialkoxysilane as the raw materials, carrying out hydrolysis condensation reactions in the presence of an anionic type or cationic type hydrolysis catalyst to generate oligomer composed of ethyl phenyl silica chain links and dimethyl silica chain links, then mixing the obtained oligomer with end-capping reagents with different structural types, carrying out reactions in the presence of an anionic type or cationic type polymerization catalyst, and subjecting the reaction products to neutralization / catalyst decomposition and reduced pressured distillation to remove low-boiling-point substances so as to obtain poly(dimethyl-ethylphenyl)siloxane copolymer with ends capped by different functional groups. The species of the monomer used in the provided method are few, the polymerization reaction conditions are mild, the reaction process control is simple, the copolymer structure is uniform, and the performance of the copolymer is excellent, and the provided method is suitable for massive industrial production.

A preparation method of an iron phosphide-supported graphene foam composite material belongs to the field of functional nanomaterials. The method is characterized in that Fe(NO3)3.9H2O is used to controllably catalyze the structural evolution and carbonization of polyvinylpyrrolidone in the sintering process, and a subsequent CVD phosphating process is combined to directly form a composite structure on the iron phosphide-supported graphene foam in order to obtain the iron phosphide-supported graphene foam composite material. Iron phosphide nanoparticles have a nearly spherical shape, have an adjustable size in a range of 30-500 nm, and can be closely and reliably combined with graphene foam. The iron phosphide nanoparticles are evenly distributed, and are closely bound to the graphene foammatrix. The composite material has the advantages of uniform composition and structure, simple process and high repeatability, and the method has the advantages of novelty and low cost, and is very suitable for large-scale promotion.