4results about How to "Effective complexation" patented technology

The invention relates to the field of fluorine chemical processes, in particular to a molybdenum hexafluoride sampling device and method. The device comprises a molybdenum hexafluoride steel cylinder, an inert gas steel cylinder, a buffer bottle, a first-stage absorption bottle, a second-stage absorption bottle and a third-stage absorption bottle, the absorption liquid is filled into the three-stage absorption bottle and is weighed, the pipeline is vacuumized and replaced after the three-stage absorption bottle is connected, the absorption bottle is purged, and the buffer bottle is vacuumized. The method comprises the following steps: heating a molybdenum hexafluoride steel cylinder, filling the molybdenum hexafluoride steel cylinder into a buffer bottle, filling inert gas, introducing the inert gas into an absorption bottle for absorption, purging a pipeline, weighing the absorption bottle, and detecting metal impurities by using ICP-OES (Inductively Coupled Plasma-Optical Emission Spectrometer). According to the method, the problem that metal impurities in high-purity molybdenum hexafluoride are difficult to safely and accurately sample is solved, and a reliable and practical solution is provided for purity quality control of the key material molybdenum hexafluoride in the fields of semiconductors, nuclear industry and the like.

The present application relates to a kind of phosphonic acid-benzenesulfonic acid double modified carbon microspheres and its preparation method and application, belong to oil field chemical field.The method includes: S1 with biomass as raw material preparation original carbon microspheres;S2 original carbon microspheres are pre-oxidized and activated, obtain activated carbon microspheres;S3 activated carbon microspheres are phosphonated grafting reaction;S4 last perform sulfonic group grafting reaction.The present application also provides the phosphonic acid-benzenesulfonic acid double modified carbon microspheres prepared by this method, and the application of the phosphonic acid-benzenesulfonic acid double modified carbon microspheres in the preparation of water-based drilling fluid.In this phosphonic acid-benzenesulfonic acid double modified carbon microspheres, phosphonic acid group and benzenesulfonic acid group are introduced into the surface of carbon microspheres by stable covalent interaction, not easy to fall off in high temperature and high salt environment, can improve the stability of material in high temperature condition, to ensure that modified carbon microspheres in downhole complex working condition Long-term effect, make drilling fluid system can simultaneously withstand high temperature and high calcium ion double test.

The invention discloses a cross-linked polymer-molecular cluster non-fluorine composite proton exchange membrane and a preparation method and application thereof, the cross-linked polymer-molecular cluster non-fluorine composite proton exchange membrane is mainly prepared from branched polyethyleneimine (PEI), polyvinyl chloride (PVC) and phosphotungstic acid (PW12), quaternized PEI and PVC are subjected to a cross-linking reaction, and then the prepared membrane is immersed in a PW12 solution to prepare the cross-linked polymer-molecular cluster non-fluorine composite proton exchange membrane. Wherein the mass ratio of the PEI to the PVC can be adjusted as required, the mass fraction of the PW12 solution is preferably 5-20%, the proton exchange membrane has good mechanical properties, thermal stability and excellent proton conductivity, and the preparation method is simple, low in cost and environmentally friendly.

This invention discloses a pH-responsive slow-release calcium fertilizer compatible with potassium dihydrogen phosphate and its preparation method, belonging to the field of agricultural fertilizer technology. Each liter of the slow-release calcium fertilizer comprises the following components: 1000-1200 g of calcium nitrate tetrahydrate; 50-100 g of small peptide amino acid solution, wherein the free amino acid content in the small peptide amino acid solution is not less than 100 g / kg, and the small peptide amino acid content is not less than 330 g / kg; 60-100 g of erythritol; 3-10 g of sodium alginate; 10-50 g of citric acid; 10-40 g of mannitol; appropriate amount of triethanolamine for adjusting the pH value to 4.5-5.8; and water to a final volume of 1 L. This invention also provides a method for preparing the calcium fertilizer. This calcium fertilizer, through a unique synergistic stabilizing system of erythritol-small peptide-weak acid, not only can be mixed with potassium dihydrogen phosphate without precipitation, solving the problem of calcium-phosphorus antagonism, but also possesses pH-responsive release characteristics, intelligently releasing calcium ions in the acidic environment of plant rhizosphere, significantly improving calcium absorption and utilization.