3results about How to "Guaranteed to dissolve" patented technology

This invention relates to a zero-residue multi-stage deflagration fracturing method and system, addressing the problems of existing deflagration fracturing devices, such as well-water pollution, failure to achieve the expected fracturing effect, and low efficiency. The multi-stage deflagration fracturing method includes: Step 1: Preparing the deflagration fracturing charge, central tube, and guide plug in the deflagration fracturing system using a combustible material that is soluble in chloride ions; Step 2: During operation of the deflagration fracturing system, a detonator ignites the central tube and the deflagration fracturing charge; Step 3: The central tube burns, the deflagration fracturing charge deflagrates, and the guide plug burns simultaneously, thus performing multi-stage deflagration fracturing; Step 4: After deflagration fracturing is completed, the residue from the central tube, deflagration fracturing charge, and guide plug falls into the well water, where it dissolves completely, achieving zero residue. To achieve the above method, this invention also proposes two zero-residue multi-stage deflagration fracturing systems.

The invention provides a method for preparing high-purity isoquercitrin from polygonum viviparum, which comprises the following steps: sequentially carrying out water extraction impurity removal and alcohol extraction on a polygonum viviparum raw material to obtain an alcohol extract; decolorizing the alcohol extract, then adjusting the pH value to 9-11 to precipitate and remove tannin, and then carrying out vacuum concentration to obtain a general flavone crude product; performing acid hydrolysis on the crude product, performing separation and purification by adopting high-pressure preparative liquid chromatography, performing online monitoring by utilizing an ultraviolet detector, and obtaining a fraction rich in isoquercitrin by accurately controlling starting and ending points of fraction collection; and concentrating under reduced pressure, washing with water and drying to obtain the product. By optimizing the pretreatment and chromatographic separation conditions, the purity and yield of the product are synchronously improved, the HPLC (High Performance Liquid Chromatography) purity of the obtained isoquercitrin reaches 98% or above, and the method is low in process operation cost, environment-friendly and suitable for large-scale production.

The application discloses a step-by-step doped porous lithium iron manganese phosphate composite material and a preparation method thereof. 2+ The application discloses a step-by-step doped porous lithium iron manganese phosphate composite material and a preparation method thereof. 2+ The application discloses a step-by-step doped porous lithium iron manganese phosphate composite material and a preparation method thereof. 2+ The application discloses a step-by-step doped porous lithium iron manganese phosphate composite material and a preparation method thereof. 2+ The application discloses a step-by-step doped porous lithium iron manganese phosphate composite material and a preparation method thereof.