31results about How to "Reduced overall reaction time" patented technology

The invention discloses a growing method of nanometer carbon pipe, which comprises the following steps: providing base; preparing nanometer catalyst solution with certain viscosity; dripping nanometer catalyst solution on the base surface through injecting device of micrometer-grade injecting needle array; forming catalyst layer; growing nanometer carbon pipe on the base surface; making catalyst drip as micrometer grade.

The invention provides a method for preparing bleeding stopping oxidized celluloses in ramie oxidation degumming procedures. The method includes smashing raw ramie to obtain short fibers and soaking the short fibers to sufficiently moisten the short fibers and allow the short fibers to sufficiently swell; mixing the pretreated raw ramie short fibers and degumming solution with one another to obtain mixtures, heating the mixtures, then preserving heat, sufficiently removing colloid in the raw ramie by the aid of oxidability of specific oxidizing agents and simultaneously oxidizing celluloses with active hydroxyl to obtain oxidized celluloses with a large quantity of carboxyl; soaking oxidized and treated fibers by the aid of organic solvent aqueous solution and removing the unreacted oxidizing agents; separating the oxidized celluloses from water and carrying out drying treatment on the oxidized celluloses to ultimately obtain the powdery bleeding stopping oxidized celluloses. The method has the advantages that processes are simple, the original two working procedures are combined into a single working procedure, accordingly, the total reaction time can be shortened, medicines and the cost can be saved, and the efficiency can be greatly improved; the bleeding stopping oxidized celluloses which are products prepared by the aid of the method are high in bleeding stopping speed and bleeding stopping efficiency and can be widely applied to quickly stopping bleeding under conditions of war wound, trauma and the like, and stable effects can be realized.

The present invention provides the synthetic method of 1,3-dinitrohalobenzene compound, comprises the following steps: A) halobenzene compound, and the mixed acid of nitric acid, sulfuric acid, carry out the first nitration reaction in one-stage continuous flow microreactor , through oil-water separation, to obtain a nitrohalobenzene compound and the first waste acid; B) diverting the mononitrohalobenzene compound into the secondary continuous flow microreactor, and carrying out the second nitration reaction with the mixed acid of nitric acid and sulfuric acid , the nitration mixture generated is quenched and filtered at the outlet of the secondary continuous flow microreactor to obtain 1,3-dinitrohalobenzene compound and the second waste acid; C) the second waste acid is recycled to the first-level continuous flow In the microreactor, carry out the third nitration reaction with the halobenzene compound, and separate the oil and water to obtain the mononitrohalobenzene compound and the third waste acid; repeat steps B), C); the halobenzene compound has the formula I structure. Short reaction time and less waste acid realize continuous production.