280 results about "Chlorine" patented technology

Method for depositing tungsten in high-aspect-ratio (>50) structure includes: depositing a tungsten layer with first thickness on side wall and bottom of the recessed structure; introducing treatment gas to the substrate, the treatment gas includes free radical containing fluorine / chlorine and free radical containing one of carbon, sulfur, nitrogen, hydrogen or oxygen; and depositing tungsten layer with second thickness, so that at least part area of the recessed structure is filled with the tungsten. The free radicals in the treatment gas form surface bond on surface of the tungsten layer, so that subsequent deposition of the tungsten can be retarded, the etching with the free radical further prevents premature closing of a top opening of the recessed structure, seams in the recessed structure can be moved downward and narrowed, and can be prevented from being exposed during a subsequent CMP treatment process.

The invention is suitable for the technical field of industrial dust remover equipment operation monitoring and maintenance, and provides an industrial dust remover operation state monitoring method and system, and the method comprises the steps: obtaining an initial maintenance period of a target dust remover, extracting a plurality of historical samples which have the same type as the target dust remover, but have different high-chlorine treatment frequencies and the same preset work cycle from the database of the target dust removal plant; by constructing the comprehensive corrosion index and analyzing the change trend of the comprehensive corrosion index along with the increase of the high-chlorine treatment frequency, the key inflection point of rapid development of corrosion caused by damage of the protective film can be captured, the future high-chlorine treatment frequency is predicted in combination with the database, and the relative deviation value of the comprehensive corrosion index and the critical point is calculated and predicted. A maintenance period correction factor is generated, the initial maintenance period is revised in real time, and prospective early warning and dynamic maintenance of the potential accelerated corrosion risk of the equipment are achieved.

The invention relates to the technical field of gas analysis, in particular to a determination method for detecting impurity elements in chlorine-nitrogen mixed gas by an ICP-MS (Inductively Coupled Plasma Mass Spectrometry) method. The invention establishes an analysis method for determining the contents of eight elements including iron (Fe), chromium (Cr), copper (Cu), zinc (Zn), nickel (Ni), sodium (Na), cadmium (Cd) and phosphorus (P) in chlorine-nitrogen mixed gas by an ICP-MS (Inductively Coupled Plasma Mass Spectrometry) method. By optimizing ICP-MS analysis conditions and a sample pretreatment process and adopting an electronic-grade solvent to leach elements, rapid and accurate detection and high reproducibility of the impurity content in the chlorine-nitrogen mixed gas are realized. The method can be applied to quality control and analysis in the production process of a chlorine-nitrogen mixed gas product, and lays a foundation for establishing a standard of a chlorine-nitrogen mixed gas analysis method.

The invention provides an electrolyte and a method for carrying out surface treatment on a base material by adopting the electrolyte. The electrolyte comprises the following components in percentage by mass: 6%-12% of an oxidizing agent; 3%-7% of an accelerant; 0.3%-6% of a corrosion inhibitor; 1%-6% of a complexing agent; 0.5%-8% of a wetting agent; and the balance of solvent. According to the method, the oxidizing agent, the accelerant, the corrosion inhibitor, the complexing agent, the wetting agent and other components are added into the electrolyte, so that the base material is subjected to nano corrosion and oxidation treatment in the same tank body, the corrosion precision is controllable, and the technological process is simplified. The same-tank treatment can save chemicals and tank equipment, and the electrolyte does not contain fluorine, chlorine and heavy metals, does not damage an aluminum oxide film, is safe in process, and reduces the wastewater treatment cost.

The invention relates to a method for simultaneously detecting fluorine and chlorine contents in lead concentrate by an ion selective electrode method, and belongs to the technical field of new material detection, and the method specifically comprises the following steps: (1) preparing a sample into a to-be-detected solution; (2) preparing a fluorine ion electrode standard solution and a chloride ion electrode standard solution; (3) calibrating a fluorine ion standard solution and a chloride ion standard solution; and (4) sample determination and data processing. According to the combined measurement method provided by the invention, through a layered coverage method, optimization of the ratio of potassium hydroxide to potassium nitrate and gradient temperature rise, on the premise of ensuring data quality, an accurate result is conveniently obtained; compared with a fluorine or chlorine testing method commonly used in the market, the method is short in time consumption, simple in equipment and accurate in data; in addition, the combined detection method provided by the invention breaks through the pH limit of traditional single ion detection, and provides a reliable solution for synchronous determination of fluorine and chlorine in a complex matrix sample.

The invention discloses a method for recovering germanium, gallium and zinc from zinc oxide smoke dust rich in germanium and gallium, and belongs to the technical field of recovery of scattered metals. The smoke dust and the high-acid leaching liquid are subjected to size mixing according to the liquid-solid ratio of (6-8): 1 and react for 1-2 h at the temperature of 60-80 DEG C, and the final acid concentration is 5-20 g / L; ore pulp and supernate are separated in sequence, concentrated sulfuric acid and waste electrolyte are added into underflow and filter pressing residues according to the liquid-solid ratio of (2-4): 1, high-acid leaching is conducted, reaction is conducted for 2-3 h at the temperature of 80-90 DEG C, and the final acid concentration is 20-30 g / L; and separating ore pulp, carrying out underflow filter pressing to obtain lead slag, and returning supernate and filtrate to the low-acid leaching section. A germanium precipitation agent is added after the low-acid leaching solution is dechlorinated, a reaction is conducted for 5-6 h at the temperature of 50-70 DEG C, the pH value of the solution obtained after germanium precipitation is 4.5-4.8, the germanium content is smaller than 0.5 mg / L, and germanium-rich slag is obtained after ore pulp is subjected to filter pressing. A neutralizer is added into the germanium-deposited liquid, the pH of the end point of first-section neutralization is 5-5.2, and gallium-rich slag is obtained after ore pulp is subjected to filter pressing; after the first-stage neutralization, liquid is subjected to second-stage neutralization, the pH value of the end point of the second-stage neutralization is 5.4-6, filter residues are returned to the first-stage neutralization section after ore pulp filter pressing, and zinc ingots are produced from liquid after the second-stage neutralization. The method can efficiently separate germanium, gallium and zinc, and is short in process flow and simple to operate.

The invention provides a method for separating chloropropene and chloropropane, which comprises the following steps of: (1) feeding circulating chloropropene into a coarse distillation tower for distillation separation to obtain chloropropene at the tower top, feeding a mixture flow obtained from a tower kettle into an extractive distillation tower from a feeding hole, performing extractive distillation on the mixture flow and an extracting agent, obtaining chloropropane at the tower top of the extractive distillation tower, and obtaining chloropropane at the tower bottom of the extractive distillation tower; obtaining a mixture flow of chloropropene and the extracting agent from the tower kettle; and (2) sending a mixture flow of chloropropene and the extraction agent obtained from the tower kettle of the extractive distillation tower to an extraction agent recovery tower for recovery, obtaining chloropropene from the tower top and obtaining the extraction agent from the tower kettle, and recycling the extraction agent to the extractive distillation tower. The circulating chloropropene is subjected to coarse rectification, extractive rectification and extraction agent recovery, so that the content of inert components in the circulating chloropropene is reduced, and the subsequent reaction efficiency is improved.

A two-dimensional particle that includes: one or plural layers that comprise a layer body represented by: MmXn, wherein Mis at least one metal of Group 3, 4, 5, 6, or 7; X is a carbon atom, a nitrogen atom, or a combination thereof; n is 1 to 4; and m is more than n but not more than 5, a modifier or terminal T exists on a surface of the layer body, wherein T is at least one selected from a hydroxyl group, a fluorine atom, a chlorine atom, an iodine atom, an oxygen atom, a chlorine atom, a phosphorus atom, and a hydrogen atom; and a hydrocarbon compound exists on the one or plural layers.

The present invention relates to a method for separating and enriching a chlorine-37 isotope using a laser photochemical reaction and, specifically, to a method for separating and enriching a high-purity chlorine-37 isotope, which is essential for a next-generation molten chloride fast reactor (MCFR) and the like, by selectively photolyzing specific isotopic molecules of iodine monochloride (ICl) using a high-power fiber laser or a solid-state Raman laser and reacting same with a radical scavenger to effectively terminate a chain reaction. Accordingly, by employing, as a light source, a single-frequency fiber laser or a solid-state Raman laser that has higher power efficiency and easier maintenance than conventional dye lasers and is capable of achieving high power of several kW or more through modular expansion, mass production on an industrial scale can be realized and the economic feasibility of the process can be significantly secured.

The present invention relates to a copper oxide powder having a specific surface area of at least 25.0 m 2 / g to 70.0 m 2 / g, a crystallite size of not more than 150.0 Angstrom (A), and a chlorine content of less than 200 ppm, and a process for the production of the copper oxide powder.

The application discloses a FeOCl / Ti3C2T x The application discloses a chlorine removal electrode material and a preparation method and application thereof, and relates to the technical field of electrode materials. x The application discloses a chlorine removal electrode material and a preparation method and application thereof, and relates to the technical field of electrode materials. ‑ The application discloses a chlorine removal electrode material and a preparation method and application thereof, and relates to the technical field of electrode materials. x The application discloses a chlorine removal electrode material and a preparation method and application thereof, and relates to the technical field of electrode materials. x The application discloses a chlorine removal electrode material and a preparation method and application thereof, and relates to the technical field of electrode materials.

The first invention provides a novel sulfonate. The second invention provides: a flame retardant with which it is possible to achieve a molded article that has excellent flame retardancy and excellent appearance; an additive composition which contains the flame retardant; a resin composition; and a molded article.　The novel sulfonate according to the first invention is represented by general formula (1). (In general formula (1), R1, R2, and R3 each independently represent a hydrogen atom, a fluorine atom, or a chlorine atom, and at least two of R1, R2, and R3 each independently represent a fluorine atom or a chlorine atom. M represents a sodium atom, a potassium atom, or a cesium atom. However, the cases where all of R1, R2, and R3 are fluorine atoms, the cases where all of R1, R2, and R3 are chlorine atoms, the cases where two selected from among R1, R2, and R3 are fluorine atoms and the balance is a hydrogen atom, and M is a potassium atom, and the cases where two selected from R1, R2, and R3 are fluorine atoms and the balance is a chlorine atom, and M is a sodium atom are excluded.)　The flame retardant according to the second invention contains a sulfonate represented by general formula (2). (In general formula (2), Q1, Q2, and Q3 each independently represent a hydrogen atom or a halogen atom, and at least one of Q1, Q2, and Q3 represents a halogen atom. X represents an alkali metal or an alkaline earth metal. However, the cases where all of Q1, Q2, and Q3 are fluorine atoms are excluded.)

The invention belongs to the technical field of flue gas sulfur oxide removal, and particularly relates to a flue gas desulfurization gypsum chloride ion concentration soft measurement method and system. The method comprises the following steps: S1, selecting characteristic variable data; s2, extracting online continuous monitoring data of chloride ion concentration in the desulfurization slurry; s3, determining a target variable; s4, screening out a final characteristic variable group; s5, performing data preprocessing on the final feature variable group; s6, establishing a training sample group based on a recurrent neural network model predictor; s7, training a preliminary recurrent neural network model; s8, obtaining a final prediction model; and S9, inputting a target characteristic variable group of the flue gas desulfurization gypsum to be measured into the trained recurrent neural network model to obtain the chloride ion concentration of the flue gas desulfurization gypsum to be measured. According to the method, the consumption of gypsum flushing water and the consumption of desulfurization wastewater treatment are reduced while the content of chloride ions in the desulfurization gypsum is ensured to reach the standard.

This invention relates to the field of electrochemical water softening technology, and particularly to a nickel-doped cobalt tetroxide-based electrode material for chlorine evolution reaction, its preparation method, and its application. The preparation method includes the following steps: S1, providing a titanium substrate; S2, coating the surface of the titanium substrate with a precursor solution containing a cobalt source and a nickel source to form a wet film; S3, sequentially drying, calcining, and cooling the wet film to form a single-layer coating; S4, repeating steps S2 and S3 to cyclically build new coating layers on the single-layer coating until a multi-layer coating structure is formed; S5, annealing and cooling the titanium substrate with the multi-layer coating structure to obtain the nickel-doped cobalt tetroxide-based electrode material. Compared with existing technologies, this invention constructs a thick-film, non-reducing agent-treated multi-layer nickel-doped cobalt tetroxide coating, which has advantages such as simple preparation method, high selectivity for chlorine evolution reaction, and low reaction resistance, effectively improving the chloride ion removal efficiency during electrolytic softening.

The present invention relates to a hydrate crystal of 5-chloro-4-(3-chloro-4-methylphenyl)-1H-imidazole-2-carbonitrile.

The application discloses a dechlorination and desodium adsorbent, which comprises an organic metal compound, a molecular sieve and gamma-alumina, and the mass content of the organic metal compound is 2-20% based on the weight of the adsorbent, preferably 3-15%. In the organic metal compound, the content of the metal in the form of an element is 0.3-3.0%, preferably 0.5-2.0%. The dechlorination and desodium adsorbent has a high removal effect on trace amounts of chlorine and sodium in coal-based raw materials.

To provide a polishing pad which reduces the size of debris while maintaining various physical properties and performance of the polishing pad in excellent states by adjusting a chlorine content to be within a specific range, and can minimize generation of defects and scratches in a CMP process.SOLUTION: A polishing pad includes a polishing layer and a support layer, wherein the polishing layer contains a urethane-based prepolymer, a foaming agent and a curing agent, and a chlorine (Cl) content obtained by analyzing the polishing layer on the basis of IEC 62321-3-2 standard is 10,000 ppm or less.SELECTED DRAWING: Figure 1

The application discloses a preparation and purification process of high-purity low-chlorine tetra (dimethylamino) tin, and belongs to the technical field of synthesis of semiconductor electronic chemicals. The three core technologies of accurate control of the molar ratio of chlorine and tin 2.00-2.05, low-temperature segmented synthesis of intermediates at-78 DEG C to-60 DEG C, and three-stage gradient low-temperature purification at 40 DEG C to 60 DEG C are used to synthesize the product with high-purity anhydrous stannous chloride and low-moisture anhydrous dimethylamine as raw materials, and double alkali reagents are used to synthesize the product, so that the risk of high-temperature decomposition is avoided in the whole process, and chlorine ions and metal impurities are deeply removed. The product has a purity of greater than or equal to 99.99%, chlorine ions are less than 10 ppm, single metal impurities are less than 1 ppm, total metal impurities are less than or equal to 5 ppm, moisture is less than 20 ppm, and the comprehensive yield is 55%-60%. The product is suitable for EUV dry photolithography, electron beam CVD and tin-based ALD processes. The process parameters of the application are quantitatively controlled in a narrow range, the technical barriers are strict, and the application has a good authorization prospect.

This invention discloses an antimony-doped wide-bandgap zirconium chloride powder-emitting crystal material, its preparation method, and its application. The chemical formula of the powder-emitting crystal material is (C9H). 15 N3)2ZrCl8:Sb 3+ It belongs to the monoclinic crystal system, with space group P21 / c; in the described photoluminescent crystal material, each zirconium atom is coordinated with 8 chlorine atoms to form [ZrCl8]. 4‑ Polyhedral structure, organic cation (C9H) 15 N3) + It is linked to inorganic anions via C–N–H···Cl bonds, forming discrete [ZrCl8]. 4‑ The octahedral structure is replaced by organic cations (C9H). 15 N3) + Complete isolation is achieved, forming a zero-dimensional ionic crystal structure. This invention overcomes the problems of single luminescent center, limited emission wavelength, and insufficient luminescence intensity in undoped zirconium-based chlorides by introducing antimony. Antimony, as an effective luminescent center, can promote the radiative recombination process and achieve high-brightness broadband emission.

The invention relates to a method for recovering silicon in the form of silicon tetrachloride, in which biochar having a silicon content of at least 1% by weight, expressed as% by weight of elemental silicon, is reacted with elemental chlorine at a temperature of 350 to 900 DEG C and the formed silicon tetrachloride is separated from the exhaust gas stream, preferably by condensation.

A method for activating an exposed layer of a structure including a provision of a structure including an exposed layer, a deposition of a layer based on a material of formula SiaYbXc, with X chosen from among fluorine F and chlorine Cl, and Y chosen from among oxygen O and nitrogen N, a, b and c being non-zero positive integers, a treatment of the layer SiaYbXc by an activation plasma based on at least one from among oxygen and nitrogen, the parameters of the deposition of the layer SiaYbXc being chosen so as to obtain a sufficiently low material density such that the layer SiaYbXc is at least partially consumed by the activation plasma.

The invention discloses a preparation method of an oxygen evolution electrode for inhibiting chlorine corrosion. The method comprises the following steps: by taking a metal substrate as an anode, electrolyzing in an electrolyte containing anions, oxidizing the surface of the metal substrate into a protective layer, and doping the anions in the electrolyte into the protective layer to enable the protective layer to be electronegative, thereby obtaining the oxygen evolution electrode with the structure of the metal substrate and the modified anion protective layer; and the anion is one of PO4 < 3->, SO4 < 2->, CO3 < 2->, WO4 < 2-> and NO3 <->. The anion-doped protective layer is used for inhibiting chloride ion corrosion, but mass transfer of ions and molecules related to oxygen evolution reaction is not obviously hindered, and a feasible scheme is provided for designing a high-activity and high-stability chlorine-resistant oxygen evolution electrode.

The invention relates to a sample pretreatment method for chromite microelement analysis. The method comprises the following steps: firstly, treating a sample to specific particle size distribution (Dv (50) lt, 5 [mu] m, Dv (90) lt, 20 [mu] m) through physical accurate grinding, and then adopting an improved two-step acid dissolution and digestion process: firstly, destroying main crystal lattices of minerals by using mixed acid, then, carrying out targeted dissolution on a residual insoluble phase by using aqua regia, and finally, carrying out chlorine removal treatment to obtain a solution to be detected. Through the synergistic effect of physical accurate grinding and secondary acid dissolution, almost complete decomposition of chromite is achieved, especially the extraction efficiency of key indissolvable elements such as Sc and Zn is improved by 20% or above, the accuracy and precision of ICP-MS analysis results are remarkably improved, and the problem that microelement measured value systematicness is low due to incomplete dissolution in a traditional method is solved.

A ceramic scintillator array (1) according to an embodiment is provided with a plurality of scintillator segments (2) and a reflective layer. The chlorine content in the reflective layer is 3000 [mu] g / g or less.

The invention provides a low chlorine loss process for producing polycrystalline silicon by a GCL silane fluidized bed method, which comprises the following steps: step 1, enabling chlorosilane waste liquid generated in the polycrystalline silicon production process to pass through a rotary drum filtering unit to obtain a chlorosilane liquid phase and waste residue; 2, recycling the chlorosilane liquid phase, feeding the waste residues into a waste residue drying unit, and evaporating residual chlorosilane and metal chloride in the waste residues to obtain dried waste residues; 3, the dried waste residues are input into a reaction etching unit to be reused, and recoverable chlorosilane and tail gas to be treated are obtained. According to the technical scheme provided by the invention, the recovery rate and the utilization efficiency of chlorine resources are improved, and the emission pollution of chlorine elements is reduced.

The invention discloses a method for electrochemically assisted treatment of fluorine-chlorine-containing wastewater. The method comprises the steps of fluorine-chlorine ion precipitation reaction, precipitate dehydration, primary electrolysis, secondary electrolysis, tertiary electrolysis and electrolyte treatment. The problems that copper and chlorine resources cannot be recycled and the treatment cost is too high in a Cu (I) precipitation dechlorination method are solved; by means of the method, the cost of the Cu (I) precipitation dechlorination method can be reduced by 90% or above, an additional product CaF2 is formed, the effect of synchronously removing fluorine and chlorine is achieved, and treatment and resource utilization of the waste water containing fluorine and chlorine are remarkably promoted; and moreover, full resource recycling of Cu, Cl and CaF and recycling of ammonia water and a KCl solution are achieved through multi-section electrolysis, closed circulation is formed, the operation cost is remarkably reduced, and resource waste is avoided.

The application discloses a resource utilization method of high-fluorine and high-chlorine soot, and belongs to the technical field of metallurgical solid waste treatment. The resource utilization method of high-fluorine and high-chlorine soot comprises the following steps: performing alkali leaching treatment on the high-fluorine and high-chlorine soot to obtain an alkali leaching solution and an alkali leaching residue; performing one-stage acid leaching on the alkali leaching residue to obtain a one-stage leaching solution and a one-stage leaching residue; performing two-stage acid leaching on the one-stage leaching residue to obtain a two-stage leaching solution and a two-stage leaching residue; recycling the two-stage leaching solution to the one-stage acid leaching system, and outputting at least part of the two-stage leaching residue as lead residue; sequentially performing indium displacement and cadmium displacement on the one-stage leaching solution to obtain indium residue, cadmium residue and cadmium displacement solution; respectively recovering thallium from the alkali leaching solution, recovering indium from the indium residue, recovering cadmium from the cadmium residue, and recovering zinc from the cadmium displacement solution. The method realizes efficient separation and resource utilization of thallium, indium, cadmium, zinc and lead in the high-fluorine and high-chlorine soot.

This invention provides an online detection method for effective chlorine concentration using a thin-layer channel electrochemical sensor. The method includes: measuring the charge transfer resistance of the sensor's working electrode using electrochemical impedance spectroscopy; intelligently determining the electrode's contamination state and triggering closed-loop adaptive cleaning; after cleaning, measuring the high-frequency impedance of the solution to obtain real-time conductivity parameters; applying a detection sequence containing at least three different potential steps, simultaneously acquiring the steady-state current, pH value, and temperature of the solution at each potential; correcting the current for conductivity based on the solution impedance; and calculating the molecular hypochlorous acid concentration in real time based on the dissociation equilibrium formula of hypochlorous acid, combined with pH value and temperature. This invention achieves intelligent maintenance of the electrode state and dynamic compensation for solution matrix interference, enabling high-precision and high-stability online detection of the molecular hypochlorous acid concentration, which plays a crucial role in disinfection efficacy.