4results about How to "Reduce adsorption loss" patented technology

The application belongs to the technical field of oil and gas exploitation, and relates to a kind of amphiphobic nano oil displacement agent and a preparation method thereof, which takes nano silicon dioxide as the core, is modified by amino silane coupling agent and hydrophobic silane coupling agent in sequence respectively, and forms dumbbell-shaped prepolymer after mixing; then is grafted by perfluoroalkyl silane coupling agent to give it hydrophobic and oleophobic properties; finally is crosslinked and solidified by epoxy silane coupling agent to form a three-dimensional network structure. The obtained oil displacement agent has excellent amphiphobicity, high temperature and high salt stability and adsorption resistance, can effectively enter the low permeability oil reservoir pore throat, and significantly improves the oil recovery. The preparation method has simple process and mild conditions, is suitable for large-scale production, and has good application prospect in improving the efficiency of oil and gas exploitation.

A water-reducing agent for coal-based solid waste concrete and its preparation method are disclosed. The water-reducing agent comprises 40-60 parts of a polycarboxylate-based main agent, 15-25 parts of a slump retainer, 10-20 parts of a crack-resistant reinforcing agent, 5-10 parts of a dispersing agent, 2-5 parts of a stabilizer, and 10-20 parts of deionized water. The slump retainer is a modified polyetheramine prepared by block copolymerization of ethylenediamine with ethylene oxide and propylene oxide; the crack-resistant reinforcing agent is a composite of nano-calcium carbonate and modified lignin sulfonate. This invention reduces the adsorption loss of the water-reducing agent by coal-based solid waste particles through the synergistic effect of the polycarboxylate-based main agent and the modified polyetheramine slump retainer, achieving a slump loss rate of ≤15% after 2 hours. The nano-calcium carbonate fills interfacial voids, and the modified lignin sulfonate alleviates hydration thermal stress, resulting in a lower 28-day drying shrinkage rate and higher crack resistance of the concrete. This invention solves the problems of poor adaptability, short slump retention time, and insufficient crack resistance of traditional water-reducing agents in high-volume coal-based solid waste concrete.

This invention discloses a method and apparatus for sorting nickel powder for silver-nickel paste, relating to the field of electronic material preparation technology. The invention involves pretreatment via atmosphere replacement, followed by deagglomeration under an alternating magnetic field, corona charging, grading and screening, and closed-loop gas circulation to complete the sorting process. Each stage is equipped with a precise detection module to collect data in real time, while the main control module dynamically adjusts parameters. During grading, a voltage of the same polarity is applied to form an electrostatic shielding layer, and the purified gas is recycled and reused. The apparatus includes a chamber, a Venturi device, an alternating magnetic field dispersion chamber, a grading chamber, a fan, and various detection modules, exhibiting an integrated structure and strong interconnectivity. This invention achieves precise control and integrated operation throughout the entire sorting process, effectively improving the uniformity and purity of nickel powder particle size, reducing energy consumption and material loss, avoiding nickel powder oxidation contamination, and meeting the stringent requirements of silver-nickel paste for raw materials. Its practicality and economic efficiency are significant.

This invention belongs to the field of cosmetic raw material preparation technology, specifically relating to a method for decolorizing Xinjiang erythromycin, its products, and applications. The method includes: raw material pretreatment: pulverizing Xinjiang erythromycin and processing it using high-pressure instantaneous explosion technology; extraction: extracting the pretreated material with an ethanol-water solution, and obtaining a crude extract of Xinjiang erythromycin after solid-liquid separation; activated carbon decolorization: adding ethanol to the crude extract and mixing evenly, then adding activated carbon for decolorization treatment, followed by solid-liquid separation after decolorization; resin purification: loading the supernatant obtained after decolorization onto a resin column, performing gradient elution, collecting the ethanol eluent rich in phenolic acids, concentrating, and drying. This invention achieves an excellent balance between efficient decolorization and retention of highly active ingredients. It can strongly adsorb and remove dark pigments while significantly reducing the adsorption loss of the target phenolic acids.