43 results about "Acetate ion" patented technology

The invention relates to the technical field of photovoltaic adhesive films, in particular to a three-layer composite EVA packaging adhesive film, a preparation method thereof and a photovoltaic module. The three-layer composite EVA packaging adhesive film comprises a first adhesive layer, a second adhesive layer and a third adhesive layer, the first adhesive layer comprises EVA resin, a first anti-PID agent and a second anti-PID agent; the second adhesive layer comprises EVA resin, a composite self-crosslinking agent and a water-binding agent; and the third adhesive layer comprises EVA resin and a composite acid-binding agent. According to the EVA packaging adhesive film, through the design of the three-layer structure, the Na ion capturing and blocking capacity and the free water vapor and acetate ion absorbing and binding capacity of the EVA packaging adhesive film are sequentially improved, the EVA packaging adhesive film has the performance characteristics of being high in adhesive force, high in light transmittance, resistant to damp and hot corrosion, resistant to PID attenuation and the like, meanwhile, the three layers of base materials are all made of EVA, compatibility of all the layers is good, and the packaging effect is good. And the production cost is low, and the method is more suitable for large-scale production and packaging application at a double-glass TOPCon battery assembly end.

The invention discloses a photocatalytic material with a baseball-shaped structure as well as a preparation method and application of the photocatalytic material, and belongs to the technical field of photocatalytic synthesis of ammonia. The invention discloses a photocatalytic material with a baseball-shaped structure. The photocatalytic material comprises FeMOF with a rod-shaped structure and MnMOF with a spherical structure, the photocatalytic material with the baseball-shaped structure takes FeMOF with a rod-shaped structure as a substrate, and MnMOF with a spherical structure grows on the FeMOF with the rod-shaped structure; and the MnMOF with the spherical structure contains acetate ions. The preparation method comprises the following steps: dissolving an iron source and a manganese source in a solvent, adding an organic ligand, carrying out ultrasonic treatment, and carrying out a hydrothermal reaction; the manganese source is manganese acetate tetrahydrate. According to the photocatalytic material with the baseball-shaped structure, MnMOF with the spherical structure uniformly grows on FeMOF with the rod-shaped structure to form an electron and hole conversion channel, so that the electron and hole transmission rate is enhanced, the photocatalytic performance of the bimetal organic framework structure is enhanced, and the yield of photocatalytic synthesis ammonia is remarkably improved.

The invention provides a novel D-A-D type fluorescent probe material as well as a preparation method and application thereof. The fluorescent probe material has good stability, the preparation process is simple, and the synthesis condition is mild. Moreover, the D-A-D type fluorescent probe material has good solubility and stability, and a complex of the D-A-D type fluorescent probe material and zinc ions can identify pyrophosphate ions with high selectivity and high sensitivity. The interference of phosphate ions, hydrogen phosphate ions, dihydrogen phosphate ions, fluorine ions, chloride ions, nitrate ions, acetate ions, sulfate ions and carbonate ions is avoided; after the zinc ion complex of the D-A-D type fluorescent probe material is combined with PPi, the fluorescence intensity is remarkably enhanced, the D-A-D type fluorescent probe material has a higher signal-to-noise ratio, in-situ imaging detection of a target object in living cells or tissues is realized, the defects of a traditional molecule and ion detection method are overcome, and the D-A-D type fluorescent probe material is suitable for being widely applied to the field of biological imaging. # imgabs0 #

The invention relates to a pyridinium-based hypochlorite detection probe and a preparation method thereof. The structure of the fluorescent probe is as shown in a formula I. The fluorescent molecular probe is prepared by taking o-alkynyl aldehyde as a raw material and carrying out condensation reaction on the o-alkynyl aldehyde and pyridinium salt. The probe synthesis method is simple, the reaction condition is mild, and the yield of the target compound is high. The fluorescent molecular probe is stable in optical performance, high in hypochlorite detection sensitivity and low in lower detection limit, the detection limit is 0.38 mu M, and the response range is 5-200 mu M. The selectivity is good, and no response is caused to fluorine ions, iodide ions, perchlorate ions, hydrogen sulfate ions, sulfate ions, acetate ions, thiocyanate ions, sulfur ions and the like. The fluorescent molecular probe provided by the invention has practical application value in the fields of biochemistry and environmental chemistry, especially detection of hypochlorite ions in water and the like. # imgabs0 #

The present invention discloses a perylene tetracarboxylic acid ester fluorescent probe for detecting fluoride ions and a detection method thereof, belonging to the technical field of analytical chemistry. The perylene tetracarboxylic acid ester fluorescent probe contains a copper ion and bipyridine-like complex structure and an O-H group. The fluorescent probe of the present invention is simple to synthesize and convenient to use. The coordination effect of copper ions enhances the ability of the O-H group to donate protons, and can specifically react with fluoride ions. Chloride ions, bromide ions, iodide ions, sulfate ions, acetate ions, perchlorate ions and dihydrogen phosphate ions have no obvious interference on the determination of fluoride ion concentration, and have the characteristics of good selectivity and high sensitivity.

The present application relates to a kind of hypochlorite detection probe based on pyridine salt and preparation method thereof.The fluorescence probe structure is as shown in formula I.The fluorescent molecular probe of the present application is prepared from o-alkynyl aldehyde as raw material, by condensation reaction with pyridine salt.The probe synthesis method is simple, and the reaction condition is mild, and the yield of target compound is high.The fluorescent molecular probe described in the present application has stable optical performance, high sensitivity for hypochlorite detection, low detection lower limit, detection limit is 0.38 μM, response range is 5-200 μM.It has good selectivity, and has no response to fluoride ion, iodine ion, perchlorate ion, bisulfate ion, sulfate ion, acetate ion, thiocyanate ion, sulfur ion, etc.The fluorescent molecular probe described in the present application has practical application value in the field of biochemistry and environmental chemistry, especially the detection of hypochlorite ion in water, etc.

This invention discloses a baseball-shaped photocatalytic material, its preparation method, and its application, belonging to the field of photocatalytic ammonia synthesis technology. The baseball-shaped photocatalytic material comprises rod-shaped FeMOF and spherical MnMOF. The baseball-shaped photocatalytic material uses rod-shaped FeMOF as a substrate, with spherical MnMOF grown on top of the rod-shaped FeMOF. The spherical MnMOF contains acetate ions. The preparation method involves dissolving an iron source and a manganese source in a solvent, adding an organic ligand, and ultrasonically treating the mixture, followed by a hydrothermal reaction. The manganese source is manganese acetate tetrahydrate. This invention's baseball-shaped photocatalytic material, through the uniform growth of spherical MnMOF on rod-shaped FeMOF, forms an electron-hole conversion channel, thereby enhancing the electron-hole transport rate, improving the photocatalytic performance of the bimetallic organic framework structure, and significantly increasing the yield of photocatalytic ammonia synthesis.

The invention belongs to the technical field of polyvinyl alcohol, and specifically relates to a polyvinyl alcohol with excellent anti-gelling property. The content of free acetate ions in the polyvinyl alcohol is less than 0.07% by mass. The polyvinyl alcohol of the invention has excellent anti-gelling property.

The invention discloses a trigonelline metformin salt and a preparation method thereof, and the preparation method comprises the following steps: providing a resin column filled with anion exchange resin, treating the resin column with a salt solution for ion replacement activation to obtain an activated resin column, anions of the salt are chloride ions, bromide ions, acetate ions, malate ions, lactate ions, tartrate ions or citrate ions; enabling the trigonelline metformin iodized salt solution to pass through an activated resin column, and selectively collecting the exchanged solution; and carrying out concentration treatment on the collected exchanged solution to obtain the trigonelline metformin salt. In combination with a specific embodiment, compared with a trigonelline metformin iodate, the solubility of the trigonelline metformin salt prepared by the preparation method of the trigonelline metformin salt provided by the invention in water is greatly improved, so that the application range of the trigonelline metformin salt is greatly expanded.

To provide a method for oxidizing santalene to santalol that reduces the risk of accumulation of explosive intermediates or toxic substances, and enables safe scale-up to an industrial scale while achieving good selectivity for the desired product.SOLUTION: The starting material may be a mixture comprising alpha-santalene, beta-santalene, and the like. The oxidation of santalene proceeds via an intermediate chloro-santalene compound, and substitution of the chloro group by acetate ions yields a mixture of the corresponding santalyl acetates, which are hydrolyzed to yield a corresponding mixture of santalols represented by Formula (I), where R is a, b, c, d, or e as shown below.SELECTED DRAWING: None

The invention provides a system and a method for co-producing single-cell protein through electrodialysis treatment of organic wastewater and hydrogen oxidizing bacteria fermentation, the system and the method are divided into an anode chamber, a middle chamber and a cathode chamber through a cation exchange membrane and an anion exchange membrane, and the anode chamber and the cathode chamber are filled with organic wastewater; and the middle chamber is filled with a hydrogen oxidizing bacteria fermentation culture medium. Under the driving of an electric field, ammonium ions and acetate ions in the wastewater are selectively migrated to the middle chamber through the anion and cation exchange membrane respectively, and are efficiently utilized by hydrogen oxidizing bacteria as a nitrogen source and a carbon source to produce single-cell protein. According to the system, collaborative integration of an electrodialysis technology and a microbial fermentation process is successfully realized, nutrient substances in the organic wastewater are recovered and converted into single-cell protein with high additional value while the organic wastewater is purified, the treatment burden is effectively converted into protein resources, and the system has environmental benefits, economical efficiency and sustainability.

The invention provides ionic liquid coated with oxide solid electrolyte and a preparation method of the ionic liquid, and belongs to the technical field of ionic liquid preparation. The structural formula of the ionic liquid disclosed by the invention is X-R-Y-R '-Si-(OCH3) 3 or X-R-Y-R'-Si-(OCH2CH3) 3, wherein X is a group containing double bonds; y is an ionic liquid group, a cation-containing group and an anion; the cationic group is one or more of imidazoles, pyridines, quaternary ammonium, quaternary phosphorus and pyrrolidines; the anions are one or more of halide ions, phosphate ions, perchlorate ions, sulfimide ions, oxalato borate ions, sulfonate ions and acetate ions. When the ionic liquid coated oxide solid electrolyte is used for a battery, the cycle life of the battery can be remarkably prolonged, the brittle stress of the oxide can be buffered by the flexibility of the ionic liquid, interface microcracks are prevented, and the ionic liquid coated oxide solid electrolyte has high safety and high energy density potential.

The invention discloses a preparation process of high-purity tetraethylammonium hydroxide and high-purity quaternary ammonium base prepared by the preparation process, and relates to the technical field of high-purity quaternary ammonium base production. The preparation process of the high-purity tetraethylammonium hydroxide comprises the following steps: S1, material preparation: taking tetraethylammonium chloride, adding water to prepare an aqueous solution, and adding an adsorbent; pre-treatment liquid is prepared; the adsorbent contains acetate ions; and S2, electrolysis is conducted, specifically, the pretreatment liquid is added into a raw material chamber of an electrolytic bath, through electrolysis, tetraethylammonium cations enter a cathode chamber through a cation membrane and are combined with hydroxyl ions generated by a cathode, tetraethylammonium hydroxide is formed, and quaternary ammonium base is prepared. The preparation process of the high-purity tetraethylammonium hydroxide has the advantage of being beneficial to improving the quality of a quaternary ammonium base product.

The invention provides a high-activity and high-durability iron oxide-based ortho-parahydrogen conversion catalyst and a preparation method and application thereof.The preparation method comprises the steps that an iron source, a high-magnetic-moment metal ion source and a solvent are mixed, and a mixed solution is obtained; positive ions in the high-magnetic-moment metal ion source are selected from one or more of manganese ions, cobalt ions and nickel ions, and negative ions in the high-magnetic-moment metal ion source are selected from one or more of nitrate radicals, chloride ions, sulfate radicals and acetate radicals; uniformly mixing the mixed solution and the load, and stirring under a heating condition until gel is obtained; and calcining the gel to obtain the iron oxide-based ortho-parahydrogen conversion catalyst. Iron oxide synthesized from an iron source is used as an active component of the catalyst, specific high-magnetic-moment metal ions are used as a doping agent, and the metal ions have more unpaired electrons outside nuclei, and can interact with unpaired electrons outside nuclei of Fe < 3 + > in the iron oxide after being doped into crystal lattices of the iron oxide, so that the metal ions are doped into the crystal lattices of the iron oxide. Larger conversion force is provided for ortho-parahydrogen conversion, so that the catalyst has higher catalytic activity.

The invention discloses a multilayer packaging adhesive film which comprises a polyolefin layer, two transition layers and two EVA layers, the two transition layers are distributed on the two sides of the polyolefin layer, and one EVA layer is arranged on the outer side of each transition layer; the main body material of the polyolefin layer is a polyolefin material, and the main body resin of the EVA layer is EVA resin; according to the weight ratio, the EVA layer further comprises 0.01-1% of a deacidification agent A and a catalyst which accounts for 0.1-5% of the weight of the deacidification agent A, the transition layer comprises 0.01-1% of the deacidification agent A and a catalyst which accounts for 0.1-5% of the weight of the deacidification agent A, and the polyolefin layer further comprises 0.01-1% of a deacidification agent B; the acid removal agent A is carbodiimide or a carbodiimide compound; and the deacidification agent B is a silane coupling agent with amino groups. Acetate ions generated by EVA in the long-term use of the photovoltaic module can be consumed, the PID effect is reduced, the light transmittance is not affected, and the interface adhesive force between layers can be improved.

The invention discloses a method for synthesizing high-purity super-crystal formamidine bromide (FABr), which is characterized in that the FABr is synthesized by means of anti-solvent addition and staged cooling, and the method comprises the following steps: (1) feeding for reaction; (2) extracting a crude product; (3) suction filtration and washing; (4) crystallizing and purifying; and (5) vacuum drying, through combination of a neutralization reaction and a recrystallization process, impurities such as metal ions and acetate ions can be effectively removed, the purity of a final product can reach 99.9% or above through verification, the method is short in process route and mild in reaction condition, the total yield can be stabilized to be 85% or above, the whole process is carried out at low temperature and in an inert atmosphere, thermal decomposition and oxidation of FABr are reduced, and the method is suitable for industrial production. The product has excellent thermal stability and storage stability, the FABr crystal obtained through temperature-controlled crystallization is uniform in size, easy to store and used for subsequent preparation of a perovskite precursor solution, used reagents are common, the cost is low, operation steps are simple, and industrial large-scale production is easy to achieve.

Coating slurry of the low-porosity high-cycle solidified pole piece comprises a polymerizable composite electrolyte, and the polymerizable composite electrolyte comprises cyclic lactone ionic liquid with a structure shown in a formula I, a polymer monomer with at least one reactive active group, electrolyte nano-particles and an initiator; the structural formula of the cyclic lactone ionic liquid with the structure shown in the formula I is # imgabs0 #, X is an oxygen heterocyclic group, and Y < + > is an ionic liquid cation group; r is any one of substituted or unsubstituted alkane group, alkoxy group, alkyl ester group, unsaturated alkyl group and cyclic hydrocarbon group, and the substituent group is selected from halogen; z <-> is selected from one or more of halogen ions, phosphate ions, perchlorate ions, sulfimide ions, oxalato borate ions, sulfonate ions and acetate ions. According to the low-porosity and high-cycle solid-state pole piece, the porosity of the pole piece is reduced, the electrochemical performance of the pole piece is improved, and the low-porosity and high-cycle solid-state pole piece is obtained.

The invention discloses a composite material and a preparation method and application thereof.The preparation method of the composite material comprises the following steps that a first solution and a second solution are provided, the first solution comprises first metal carboxylate and a first solvent, and the second solution comprises alkali and a second solvent; at least one of the first solvent and the second solvent comprises a functional solvent, and the dielectric constant of the functional solvent at 20-40 DEG C is 15-80; and mixing the first solution and the second solution to obtain the composite material. According to the preparation method provided by the invention, the content of acetate ions in the composite material can be increased.

To provide a heat storable substance which can form a semi-clathrate hydrate without presence of a halogen element.SOLUTION: Provided is a heat storable substance comprising an ionic material and water, in which the ionic material includes at least one cation selected from a group consisting of tri-n-butyl n-hexyl ammonium cation, tri-n-butyl n-pentyl phosphonium cation, and tri-n-butyl n-hexyl phosphonium cation, and at least one anion selected from a group consisting of acetate ions, propionate ions, butyrate ions, valerate ions, isovalerate ions, and acrylate ions.SELECTED DRAWING: None

The invention discloses a curable additive containing a polymer monomer I and a perfluoroalkyl ionic liquid II, a high oxidation potential electrolyte containing the curable additive and a battery, the structural formula of the polymer monomer I is shown in the specification, wherein R1-R3 are selected from C1-C4 alkyl, alkoxy, halogenated alkyl or halogenated alkoxy, and the structural formula of the perfluoroalkyl ionic liquid II is shown in the specification. R4 is selected from alkylene groups or halogenated alkyl groups of C1-C6, and R5 is selected from alkyl groups or halogenated alkyl groups of C1-C2; the structural formula of the perfluoroalkyl ionic liquid II is shown in the specification, wherein X and Y are respectively and independently selected from one or more of imidazoles, pyridines, quaternary ammonium, quaternary phosphorus, pyrrolidines or piperidines, and R is selected from perfluoro-substituted C1-C10 alkylene; z <-> and Z < '-> are respectively and independently selected from one or more of halide ions, phosphate ions, perchlorate ions, sulfimide ions, oxalato borate ions, sulfonate ions and acetate ions. The invention constructs the high oxidation potential electrolyte and the battery with high safety and conductivity.

Provided is a functional feather comprising: a feather; and a metal salt, a quaternary ammonium salt, and an insect repelling component that adhere to the feather. The metal salt is formed from: ions of at least one metal selected from the group consisting of iron, cobalt, nickel, copper, zinc, platinum, silver, and gold; and at least one type of anion selected from the group consisting of chloride ions, bromide ions, fluoride ions, iodide ions, sulfate ions, hydroxide ions, nitrate ions, and acetate ions. The feather does not have a binder resin attached thereto or has attached thereto a binder resin at 1 mass% or less of the mass of the feather. The mite repellency rate measured in accordance with JIS L 1920:2007 8.2 glass tube method B is 50% or greater.

The invention relates to a copper alloy surface micro-etching solution and a preparation method thereof, and belongs to the technical field of micro-etching solutions. The copper alloy surface micro-etching liquid is prepared by taking a self-made supported phosphotungstic heteropolyacid catalyst, glacial acetic acid, a hydrogen peroxide solution, a buffer agent, a stabilizer and a corrosion inhibitor as raw materials, and the copper alloy surface micro-etching liquid is prepared by the following steps: firstly, synthesizing peracetic acid with higher oxidability by using the catalyst, hydrogen peroxide and glacial acetic acid; according to the micro-etching liquid, the copper alloy surface is etched under the weak acidic condition, the conductivity of the micro-etching liquid is further reduced, the purpose of inhibiting the galvanic effect of the copper alloy surface is achieved, in addition, due to the existence of a large number of acetate ions, the content of metal ions in the micro-etching liquid is very low, a pH buffer system exists, and the corrosion resistance of the copper alloy surface is improved. The influence of the overall oxidability of the micro-etching liquid along with the change of the reaction time is small, the etching effect is uniform, the concentration of a single component can be reduced through a hydrogen peroxide / peracetic acid compound system, and damage to a base material due to the too high single component is avoided.

The invention discloses a human neural stem cell preserving fluid and a preparation method thereof, and the preserving fluid comprises 30 mM of potassium ions, 30 mM of sodium ions, 0.5 mM of magnesium ions, 5 mM of dihydrogen phosphate ions, 5 mM of hydroxyl ions, 20 mM of acetate ions, 32 mM of chloride ions, 5 mM of glucose, 200 mM of sorbitol and pure water. The preparation method comprises the following steps: mixing potassium chloride, sodium hydroxide, sodium dihydrogen phosphate dihydrate, magnesium chloride hexahydrate, sodium pyruvate, glucose and sorbitol, uniformly stirring while adding pure water, fixing the volume, and filtering by using a 0.22 mu m filter to obtain the product. And centrifuging 500g of human neural stem cells for 3 minutes, discarding the supernatant, resuspending the cells by using the preserving fluid, subpackaging and transferring to 2-8 DEG C for preservation. The preserving fluid can prolong the survival rate maintaining time of the human neural stem cells, and the cell survival rate is not lower than 90% after the human neural stem cells are preserved for 72 hours.

This invention proposes a low-porosity, high-cycle solid-state electrode, the coating slurry of which includes a polymerizable composite electrolyte. The polymerizable composite electrolyte comprises a cyclic lactone-based ionic liquid with Formula I, a polymer monomer having at least one reactive active group, electrolyte nanoparticles, and an initiator. The cyclic lactone-based ionic liquid with Formula I has the following structural formula: [Formula omitted for brevity]. Where X is an oxocyclic group, Y... + The ionic liquid has a cationic group; R is any one of substituted or unsubstituted alkane, alkoxy, alkyl ester, unsaturated hydrocarbon, or cyclic hydrocarbon groups, and the substituent is selected from halogens; Z ‑ The ions are selected from one or more of halide ions, phosphate ions, perchlorate ions, sulfonylimide ions, oxalate-borate ions, sulfonate ions, and acetate ions. The low-porosity, high-cycle solidified electrode proposed in this invention improves the electrochemical performance of the electrode while reducing its porosity, thus obtaining a low-porosity, high-cycle solidified electrode.

The present invention relates to an iron nanocluster that can be designated using the formula "FeNC@HisAcAsc", having the following properties: - its surface is covered with a mixed layer comprising histidine (His), acetate ions (Ac) and ascorbate ions (Asc); - it is spherical; - it has a hydrodynamic diameter in the range of 0.6 to 2.0 nm, preferably less than 1.0 nm; - it has a metal core diameter in the range of 0.5 to 1.5 nm, preferably less than 1.0 nm; - the nanocluster exhibits a stability period in the range of 5 to 20 weeks when stored in liquid form at a temperature of 4°C; - the nanocluster exhibits a stability period of at least 12 months, preferably 12 to 18 months when stored in dry form at a temperature of 4°C under nitrogen; - it exhibits spectrophotometric characteristics in the UV-visible spectrum with a shoulder at 300±15 nm and in the fluorescence spectrum with an excitation wavelength of 364±15 nm and an emission wavelength of 415±15 nm. The present invention also relates to a method for preparing said iron nanoclusters and to their use in treating iron deficiency.

The invention relates to a synthesis method of a novel dual-wavelength off-on fluorescent molecular probe for identifying and detecting hypochlorite and application of the fluorescent probe in detection of hypochlorite. The structure of the fluorescent probe is as shown in a formula I. The fluorescent molecular probe disclosed by the invention is prepared by taking a water sample azine as a raw material and reacting with dimethylaminoformyl chloride. The synthesis method of the probe is simple, reaction conditions are mild, and the yield of the target compound is high. The fluorescent molecular probe is stable in optical performance, high in hypochlorite detection sensitivity and low in lower detection limit, the detection limit is 0.37 mu M, and the response range is 50-180 mu M. The selectivity is good, and no response is caused to fluorine ions, iodide ions, perchlorate ions, hydrogen sulfate ions, sulfate ions, acetate ions, thiocyanate ions, sulfur ions and the like. The fluorescent molecular probe provided by the invention has practical application value in the fields of biochemistry and environmental chemistry, especially detection of hypochlorite ions in water and the like.

A polishing composition for gallium oxide substrates and a polishing method, wherein the polishing composition contains silica particles, water, and polyvalent anions. The content of the polyvalent anions is 0.002 mole / liter or Jess in the polishing composition. The polyvalent anions include at least one kind of polyvalent anions selected from the group including sulfate ions, oxalate ions, citrate ions, and phosphate ions. The polishing composition for gallium oxide substrates additionally contains monovalent anions, and the content of the monovalent anions is 0.04 mole / liter or less in the polishing composition. The monovalent anions include at least one kind of monovalent anions selected from the group including nitrate ions, chloride ions, bromide ions, chlorate ions, bromide ions, acetate ions, formate ions, propionate ions, and butyrate ions. The polishing composition for gallium oxide substrates has a pH of 5.0 to 9.5 inclusive.

The invention provides an impurity removal method for ammonium chloride flash water, which comprises the following steps of: removing ammonia nitrogen from the ammonium chloride flash water: adjusting the pH value of the ammonium chloride flash water to be alkaline by using alkali, adding magnesium salt and phosphate to generate magnesium ammonium phosphate precipitate, stirring, crystallizing, standing, filtering and separating to obtain magnesium ammonium phosphate and filtrate for later use; and acetate ion removal of the ammonium chloride flash water: enabling the filtrate to pass through a resin column, and removing acetate to obtain the ammonium chloride flash water after impurity removal. In order to solve the problem that the ammonium chloride flash water is difficult to effectively treat, residual chloroacetate ions in the ammonium chloride flash water are removed by adopting methods such as activated carbon adsorption and ion exchange resin adsorption, and the ammonium chloride flash water is applied to an ammonium glyphosate aqueous solution, so that the treatment cost of the ammonium chloride flash water is greatly reduced; and a new thought is provided for the treatment of the ammonium chloride flash water.

The invention relates to the technical field of catalysis, and discloses a catalyst, a preparation method and application thereof, and a preparation method of dimethyl terephthalate. The catalyst comprises a polyester terephthalate carrier and an active component loaded on the polyester terephthalate carrier, the active component contains acetate ions and metal ions, and the metal ions are selected from at least one of IA group metal ions and IIB group metal ions. The catalyst can be conveniently and quickly separated from ester exchange and / or esterification products when applied to ester exchange and / or esterification reaction, is convenient to use for multiple times, and has relatively high catalytic activity; the product prepared by the catalyst has high purity and good hue.

[Problem] The present invention addresses the problem of providing: a polishing composition for polishing a gallium oxide substrate at a high polishing rate; and a polishing method for the same. [Solution] The present invention provides a polishing composition for gallium oxide substrates, the polishing composition containing silica particles, water, and polyvalent anions. The content of the polyvalent anions is 0.002 mole / liter or less in the polishing composition. The polyvalent anions include at least one kind of polyvalent anions selected from the group consisting of sulfate ions, oxalate ions, citrate ions, and phosphate ions. The polishing composition for gallium oxide substrates additionally contains monovalent anions, and the content of the monovalent anions is 0.04 mole / liter or less in the polishing composition. The monovalent anions include at least one kind of monovalent anions selected from the group consisting of nitrate ions, chloride ions, bromide ions, chlorate ions, bromide ions, acetate ions, formate ions, propionate ions, and butyrate ions. The polishing composition for gallium oxide substrates has a pH of 5.0 to 9.5 inclusive.