18 results about "Chemical Actions" patented technology

The application discloses a kind of composite heavy metal pollution site three-dimensional identification and earthwork volume estimation method and system, and it is related to computer data processing technical field.Target site survey data is obtained and engineering voxel space resolution is set, and the chemical action parameter between heavy metals is extracted to construct composite spatial variation function.Three-dimensional distribution model is constructed using three-dimensional space interpolation, and preliminary pollution spatial grid set is extracted according to risk control threshold discretization.Boole logic operation is introduced to cross screen out single and composite heavy metal pollution area, and three-dimensional engineering boundary is obtained by boundary topology reconstruction with minimum mechanical construction envelope as constraint, and then the corresponding pollution total volume is estimated using spatial volume integration algorithm.The application can output three-dimensional boundary with engineering excavation continuity and realize accurate estimation of various pollution quantities.

The application relates to an oil field pipeline siliceous scale cleaning agent and a preparation process thereof, and relates to the technical field of oil field pipeline maintenance and chemical cleaning. The agent comprises the following components: an interfacial active component 5-8%, a chelating agent 15-20%, a complex conversion agent 10-12%, a pH regulator 3-5%, a biodegradation promoter 2-3%, and deionized water 52-65%. The pH value of the agent system is 8-10. The oil field pipeline siliceous scale cleaning agent is matched with interfacial active components, chelating agents, complex conversion agents and various functional components to form a mutual cooperation relationship. Under the synergistic effect of the interfacial action and the chemical action, the effect of the cleaning agent can be improved, the industrial descaling and cleaning efficiency is greatly improved, the discharge of the agent meets the national environmental protection discharge standard due to the biodegradation promoter, the traditional agent is prevented from polluting the environment, the weak alkaline pH regulator has no corrosion effect on commonly used equipment substrates such as carbon steel, stainless steel and enamel, the equipment is not damaged in the descaling process, and the service life of the equipment is prolonged.

The application belongs to the technical field of filter membrane materials, and particularly relates to a polymer membrane material, a preparation method and application thereof. The polymer membrane material comprises the following mass percentage of raw materials: 10-18% of a film-forming polymer, 0.1-22% of an alkenyl monomer, 0.1-3% of an initiator, 0.1-22% of a coupling agent and 35-89.7% of an organic solvent; the alkenyl monomer comprises an alkenyl hydrophilic monomer and an alkenyl siloxyl monomer. The alkenyl monomer is physically entangled with the film-forming polymer through in-situ polymerization, so that the hydrophilicity and the antifouling property of the polymer membrane material are improved; the coupling agent is pre-embedded in the casting solution as an anchor point for subsequent reaction, and in the phase separation and solidification process, the coupling agent can be used as a uniformly distributed 'network node' to rapidly couple and crosslink through chemical action, so that the covalent force is used as an internal driving force to inhibit segregation, and the hydrophilic modifier which is prone to segregation and dissolution is locked in the polymer membrane, so that the stability is improved.

The invention discloses a cleaning method for a semiconductor photoetching mask substrate, and belongs to the technical field of semiconductor manufacturing. According to the method, dynamic cleaning logic of step cooperation and energy matching is adopted, and the steps of interface wetting and pre-cleaning, chemical soft interface construction, low-damage mechanical stripping and synchronous washing, targeted reaction clearing, microstructure deep cleaning, interface dehydration and modification and final energy-assisted drying are sequentially executed. The method is characterized in that through the dependency relationship of chemical interface softening and low-damage mechanical stripping in sequence, the rotation speed of a substrate in each step is strictly controlled to meet the specific dynamic relationship (V2 < V1 < V4 < V3 < V5 < V6), and precise cooperation of chemical action, physical stripping and energy field cleaning is achieved. The contradiction between efficiency and substrate damage in a traditional cleaning process is effectively solved, full-scale pollutants from micron-scale particles to nano-scale molecular contamination can be removed without dead corners, and a clean, stable and secondary pollution resistant surface state is actively reconstructed at a cleaning end point; and the cleanliness and the service life of the mask substrate and the yield of a downstream photoetching process are remarkably improved.

This invention relates to the field of microcapsule preparation technology, and more particularly to a method for preparing probiotic microcapsules. The invention involves mixing a probiotic suspension with a tris(2-carboxyethyl)phosphine solution and performing a reduction reaction to obtain a thiolized probiotic suspension. Then, a thiolized polysaccharide is mixed with the thiolized probiotic suspension and subjected to a covalent bonding reaction to obtain probiotic microcapsules. This invention uses a simple chemical reaction to reduce the disulfide bonds on the surface of probiotics to free thiols, enabling the thiolized polysaccharide and probiotics to covalently bind, resulting in a stronger bond between the polysaccharide and the probiotics. The microcapsules prepared from the modified polysaccharide and probiotics can also bind to the mucin-rich mucus layer in the intestinal lining, undergoing a catalyst-free thiol-disulfide exchange reaction, colonizing the mucus layer in the intestine, and producing better therapeutic effects for intestinal diseases and enhanced probiotic benefits.

The invention discloses a method for efficiently extracting straw hemicellulose through physical and chemical synergistic reinforcement, and relates to the field of comprehensive utilization of crop straws. The method comprises the steps of raw material pretreatment, alkali liquor preparation and mixing, ultrasonic pretreatment, alkali liquor extraction, pH adjustment, supernatant separation and concentration, hemicellulose precipitation, separation post-treatment and the like, and the core is to destroy a straw cell wall structure by utilizing an ultrasonic cavitation effect through cooperation of an ultrasonic physical effect and an alkali liquor chemical effect so as to enhance the permeability and improve the hemicellulose separation efficiency. And connecting bonds of the hemicellulose and other components are dissociated in cooperation with low-concentration alkali liquor, and efficient separation and extraction of the hemicellulose are achieved. The extraction rate of the straw hemicellulose can reach 85% or above, the concentration of the used alkali liquor is only 0.5-10%, the extraction time is only 1-1.5 hours, and the chemical structure of the hemicellulose can be completely reserved. The method is easy to operate, low in cost, environmentally friendly, suitable for various raw materials such as corn straw and wheat straw and capable of being popularized on a large scale, and an effective technical scheme is provided for high-value utilization of straw biomass.

The application belongs to the technical field of materials, and particularly relates to a metal organic framework loaded zinc ricinoleate composite material and a preparation method and application thereof. The metal organic framework loaded zinc ricinoleate composite material comprises MOFs as a carrier, and zinc ricinoleate is loaded on the inner surface and / or outer surface of pores of the MOFs through a surface activator of the MOFs in physical adsorption and / or chemical action. The comprehensive performance of adsorption and reaction removal of volatile organic compounds (VOCs) such as formaldehyde, and odor pollutants such as ammonia and trimethylamine of the composite material prepared by the application is improved.

This paper proposes a technique using modified water that facilitates the cleaning of device lumens. The modified water is used to generate a chemical reaction that reduces the adhesion of contaminants to the surfaces of the device lumens. A contaminant separation cleaning action is used in conjunction with the chemical reaction to separate the contaminants from the surfaces of the device lumens, thereby facilitating their removal from the device lumens.

The application discloses a kind of anthracite-based porous carbon materials and its gradient activation preparation method and application, it is related to carbon material preparation technical field, its technical scheme main point is: the inert surface of anthracite is broken under mild conditions by using low-temperature plasma in the present application, initial defect is introduced and in-situ doping is carried out;Then, the particles are refined by mechanical chemical action, and the sodium salt is uniformly embedded, providing a template for subsequent pore forming;Then, the gradient strategy of low-temperature steam opening and high-temperature expansion is used to cooperatively build a microporous, mesoporous hierarchical interconnected pore system;Finally, impurities are removed to obtain high-purity materials, the present application enables the finally prepared porous carbon material to have a high specific surface area of 1620-2080 m² / g, a suitable mesopore ratio of 62-72%, and a controllable nitrogen doping amount of 1.9-2.8 at.%.

Discovery of the first rare earth-dependent enzyme in methylotrophic M. extorquens AM1 prompted research toward understanding the unique chemistry at play in these systems. This enzyme, an alcohol dehydrogenase (ADH), features a La3+ ion closely associated with redox-active coenzyme pyrroloquinoline quinone (PQQ). AM1 also produces a periplasmic PQQ-binding protein characterized by a Lys residue hydrogen-bonded to PQQ. Accordingly, we prepared K115A-, and K115D-PqqT variants to assess the relevance of this site toward metal binding. Isothermal titration calorimetry experiments, and titrations monitored by UV-vis absorption and emission spectroscopies support that K115D-PqqT binds tightly (Kd=0.6±0.2 μM) to La3+ in the presence of bound PQQ and produces spectral signatures consistent with those of ADH enzymes. Addition of benzyl alcohol to La3+-bound PQQ⊂K115D-PqqT produces spectroscopic changes associated with PQQ reduction, and chemical trapping experiments reveal the production of benzaldehyde, supporting ADH activity.

The invention discloses a method for preparing coal water slurry from coal chemical industry wastewater, and belongs to the technical field of wastewater recycling. The method comprises the following steps: adding a first complexing agent into the coal chemical wastewater, and uniformly stirring; adding a second complexing agent into the obtained solution, and uniformly stirring; continuously adding a dispersing agent; and mixing and stirring the obtained solution with pulverized coal. According to the method, different complexing agent systems are added in stages, so that metal ions in the wastewater can be preferentially treated, the metal ions do not need to be separated from the wastewater, the activity of the metal ions is shielded in situ through chemical action, the complex process of a pretreatment process is avoided, and the interference of the metal ions on the slurrying property can be accurately solved. Meanwhile, the method is low in implementation cost, environment-friendly and high in compatibility.

The invention discloses a cladding failure analysis method for metal fuel of a liquid sodium-cooled reactor, which comprises the following steps of: firstly, modeling a simulated reactor core according to structural parameters and operating parameters of the reactor, and calculating the component migration behavior of a metal fuel rod according to a one-dimensional diffusion model of a heat transport theory; by considering weakening of various chemical effects on mechanical strength of the cladding, a multi-group bubble fission gas behavior model is established to calculate fuel swelling and fission gas release amount, an improved ideal gas state equation is used to calculate fission gas cavity pressure, a fuel rod mechanical model is established to calculate mechanical behaviors of a fuel rod, and safety analysis parameters are calculated in real time. And judging whether the cladding fails or not according to a thermodynamic analysis result by adopting the cumulative life score. Compared with the prior art, the method has the advantages that various mechanism models are used, various factors influencing the cladding failure in the reactor irradiation process are considered, the stability and the calculation efficiency of a numerical algorithm are improved, and the cladding failure behavior of the metal fuel under serious accidents can be accurately and comprehensively simulated and analyzed.

This invention relates to the technical field of materials science, and in particular to a multiphase material with a gradient interface phase and its preparation method, comprising a first phase material, a second phase material, and a gradient functional layer located at the interface between the two. The concentration of at least one substance in the gradient functional layer varies continuously or quasi-continuously from the region near the first phase to the region near the second phase. During preparation, a pre-formed layer containing a second-phase precursor and functional filler is first constructed on the surface of the first phase, and then combined with the second phase for molding. Physicochemical reactions allow the substances to penetrate and fuse across the interface, forming a gradient structure in situ. This application can eliminate performance abrupt changes at heterogeneous interfaces, effectively alleviate stress concentration, and suppress delamination failure. Through this design, the interfacial bonding strength and overall mechanical properties of the material are significantly improved, with bending strength increasing by up to 15.4%. It is applicable to various material systems and has strong prospects for industrial application.

The invention discloses a method for stabilizing wheat germ quality by adopting a low-temperature plasma technology, and belongs to the technical field of agricultural product processing and storage. A high-voltage electric field is used for ionizing air to generate low-temperature plasmas rich in active particles (such as ozone, free radicals and excited molecules), and the high-activity substances and the surfaces of the wheat germs have physical and chemical effects: on one hand, cell structures attached to microorganisms are damaged through oxidative damage, and efficient sterilization is realized; on the other hand, germ surface protein and lipid molecules can be induced to generate moderate crosslinking to form a protective layer, and meanwhile, vulnerable components such as lipoxygenase are passivated. Moreover, the method disclosed by the invention is carried out at room temperature, and grease oxidation and microorganism breeding in the storage process can be effectively inhibited, so that the stable period of the wheat germs is remarkably prolonged, and nutritional active ingredients of the wheat germs are well reserved.

This invention discloses a chemical mechanical polishing (CMP) method for efficient planarization of ruthenium surfaces, comprising: preparing a CMP slurry, wherein the slurry includes an oxidant, a complexing agent, a corrosion inhibitor, an abrasive, and a pH adjuster, and the solvent is deionized water; ultrasonically cleaning a substrate with a ruthenium layer deposited thereon to obtain a ruthenium substrate to be polished; attaching the ruthenium substrate to be polished to the polishing disc of a polishing machine for CMP polishing. This invention employs an oxidation-complexing system of ammonium persulfate and glycine to gently oxidize the ruthenium surface to form a soluble complex, avoiding excessive corrosion. Benzotriazole is used as a corrosion inhibitor, selectively adsorbed on the ruthenium surface to inhibit corrosion in non-polished areas. Nano-silica abrasives provide mechanical removal, synergistically achieving efficient planarization with chemical action. The low pH environment helps inhibit excessive oxidation of ruthenium, improving surface quality and achieving a better polishing effect for the entire ruthenium layer.

The invention discloses a polymer biological blocking remover and application thereof, and belongs to chemicals for oil fields. The polymer biological blocking remover is prepared from the following components in parts by weight: 0.1-5 parts of an organic acid coupling agent, 1-20 parts of a biocatalyst, 0.5-5 parts of an inducer, 0.01-5 parts of a bioactive aid and 65-98.39 parts of water. The gel breaker can rapidly degrade HPAM and related gel in a low-temperature environment of 50 DEG C or below, is high in gel breaking speed and small in dosage, and is suitable for oilfield sewage treatment and oily sludge treatment; the blocking remover does not contain dangerous components such as a strong oxidant and chlorobenzene, so that potential safety hazards such as fire, explosion, corrosion and highly toxic gas possibly caused by an oxidized blocking remover are avoided, and the blocking remover is safer and more environment-friendly; polymers are directly degraded through chemical action, and water-insoluble by-products are not generated like an oxidized blocking remover, so that secondary blocking of a stratum is effectively prevented; the product is good in stability, easy to store and transport, simple in field operation, simple in construction and suitable for large-scale application; the device is wider in applicable temperature range, lower in cost, higher in economic benefit and more beneficial to popularization and application.

The utility model provides a spontaneous combustion prevention activated carbon adsorption device and a spontaneous combustion prevention activated carbon adsorption system. By arranging the temperature detection unit and combining with the intelligent control system, the temperature change in the adsorption cavity is monitored in real time. When the temperature of the activated carbon rises due to physical or chemical action in the adsorption process, the device can adjust the temperature in time through the cooling unit, the problem of spontaneous combustion of the activated carbon caused by too high temperature is effectively prevented, and therefore the safety and operation reliability of equipment are greatly improved. On the basis, efficient adsorption of volatile organic compounds is achieved through the porous structure of activated carbon, and the problems of low adsorption efficiency, incomplete desorption and the like in the prior art are solved. According to the utility model, not only is the safety remarkably enhanced, but also good processing performance and industrial application value are achieved.

A method for providing a passivation layer or pH protective coating on a substrate surface by PECVD is provided, the method comprising generating a plasma from a gaseous reactant comprising polymerizing gases. The lubricity, passivation, pH protective, hydrophobicity, and / or barrier properties of the passivation layer or pH protective coating are set by setting the ratio of the O2 to the organosilicon precursor in the precursor feed, and / or by setting the electric power used for generating the plasma. In particular, a passivation layer or pH protective coating made by the method is provided. Pharmaceutical packages coated by the method and the use of such packages protecting composition contained in the vessel against mechanical and / or chemical effects of the surface of the package without a passivation layer or pH protective coating material are also provided.