5results about How to "Extend stable running time" patented technology

The utility model discloses a kind of from production acid-base's concentrated seawater bromine extraction resource system, it is related to seawater resource technology field, including parallel coupling configuration's air blow method seawater bromine extraction system and bipolar membrane acid-base system;On the basis of seawater bromine extraction system using air blow method, introduce bipolar membrane electrodialysis as bypass system, handle part seawater, obtain the acid-base of satisfying production requirement concentration, use acid for subsequent seawater acidification process, alkali is used to neutralize the acidic bromine extraction mother liquor generated.The method does not affect the original seawater bromine extraction process under the premise, by adjusting the acid-base concentration and feed liquid treatment capacity of bipolar membrane acid-base system, both can satisfy seawater bromine extraction process system's acid-base use demand, also can produce economic value's acid-base product outside sale according to actual operation situation.In the realization of waste liquid standard discharge, reduce the demand of enterprise acid-base acquisition, can provide feasibility strategy for enterprise cost reduction and efficiency improvement.

The application relates to the field of semiconductor technology and discloses a method for improving the ion implantation uniformity of a high-energy ion implanter, which comprises the following steps: firstly, generating plasma with a density of 10^11 / m^3 in an arc chamber by optimizing ion source excitation parameters; then, establishing a mathematical model based on a mean square deviation formula, calculating a deviation coefficient of an injection beam current intensity in real time, and adjusting the moving speed of a scanning mechanism in a closed loop to realize dose compensation; in addition, a full solid-state radio frequency power supply and a multistage resonant cavity are adopted to reduce energy loss, and a composite structure manufactured by a vacuum brazing process is used to improve the thermal stability of an extraction system. In combination with atomic mass analysis and an energy screening model, the application precisely controls the beam quality from multiple dimensions such as a physical source, energy management and structural deformation. The method significantly improves the spatial uniformity and depth consistency of the implantation dose, and meets the requirements of high-precision, long-term stable ion implantation processes under advanced processes.

This invention relates to the field of material analysis and detection technology, specifically disclosing a method for determining the lithium isotope ratio of spodumene using laser ablation-multiple-receiver inductively coupled plasma mass spectrometry (ICP-MS). The method includes: adding water vapor to the laser carrier gas to achieve wet plasma conditions; performing laser ablation with a laser spot size of 24-45 μm and a repetition frequency of 2-4 Hz; using natural spodumene megacrystalline crystals or synthetic spodumene glass with uniform lithium isotope composition as calibration reference materials, alternating with the sample to be tested for ablation analysis, and using a cross-injection method to correct instrument mass deviations. This invention systematically characterized four candidate reference materials, whose δ... 7 Recommended Li values ​​were 12.85±0.31‰, 12.29±0.31‰, 12.37±0.35‰, and 4.74±0.30‰, respectively. This method optimizes the water vapor addition rate and laser ablation parameters, which can reduce carrier gas consumption, decrease mass fractionation, and δ... 7 The accuracy of Li determination has been significantly improved, making it suitable for in-situ micro-area analysis in the mineralization study of pegmatite-type lithium deposits.

The invention relates to the field of molecular sieves, and particularly discloses a nano H-Beta molecular sieve, the grain size of which is less than 40nm. The XRD spectrum of the molecular sieve shows that the molecular sieve has the strongest peak at the 2theta angle of 23 degrees; the nano H-Beta molecular sieve disclosed by the invention is uniform in particle size, can improve diffusion of reactant molecules, and has good selectivity; the molecular sieve also has more exposed catalytic activity sites, so that the molecular sieve is good in catalytic activity and high in stability, the carbon deposition generation rate can be remarkably reduced, the catalytic efficiency of the molecular sieve is improved, and the molecular sieve is particularly suitable for being used as a catalyst and is particularly suitable for being used as a catalyst in preparation of diisopropylbenzene.

The application relates to the technical field of renewable bio-energy, in particular to a rare earth coordination-based anti-poisoning self-repairing catalyst and application of the catalyst in bio-jet fuel, wherein the catalyst is a Co-Ce bimetallic system loaded with a layered double hydroxide derivative composite oxide, the MgAl-LDH calcination product with a memory effect is used as a carrier, Co nanoparticles are used as main active metals, Ce 3+ / Ce 4+ Oxidation-reduction pairs are anti-poisoning self-repairing assistants. First, Ce 3+ is used to protect Co active sites by preferentially coordinating with sulfur / nitrogen poisons, then, in the oxygen-containing and regeneration stages, the memory effect of the LDH carrier is used to induce Ce species to redisperse, and Ce 4+ is reduced to Ce 3+ , the poisons are released, and activity regeneration is completed. In summary, the application solves the technical problem that existing hydrogen-deoxidization catalysts are easily poisoned and deactivated by sulfur and nitrogen impurities and cannot be regenerated in situ, and can greatly improve the economy of bio-jet fuel production.