774 results about "Alkaline water" patented technology

The invention discloses a desalting membrane as well as a preparation method and application thereof, and relates to the technical field of membrane separation. The desalting membrane comprises a porous ultrafiltration base membrane and a functional layer formed on the surface of the porous ultrafiltration base membrane; the functional layer is formed by copolymerizing and cross-linking a polyamine monomer, a zwitterionic multi-element hydroxyl monomer and an acyl chloride monomer through an interfacial polymerization reaction. The preparation method comprises the following steps: providing the porous ultrafiltration base membrane; coating the surface of the porous ultrafiltration base membrane with an alkaline water-phase solution containing a polyamine monomer and a zwitterionic multi-hydroxyl monomer to form a water-phase solution layer; coating an oil-phase solution containing an acyl chloride monomer on the surface of the water-phase solution layer to form a functional layer; and performing heat treatment. The invention also provides application of the desalination membrane in any one of seawater desalination, brackish water desalination, wastewater treatment and material separation and concentration. According to the invention, zwitter-ion-based multi-hydroxyl monomers are introduced into water-phase monomers to participate in interfacial polymerization, and a super-hydrophilic nano-channel is constructed in a separation layer, so that the water flux and the desalination rate of the membrane are remarkably improved.

The invention relates to the technical field of industrial process control, and discloses an intelligent optimization control method of an alkaline water hydrogen production system, which comprises the following steps: a controller synchronously acquires real-time voltage, current and temperature data of an electrolytic bath; theoretical reversible voltage is calculated according to a Nernst equation, ohm voltage drop is eliminated, and a bubble additional impedance value representing the bubble coverage degree is analyzed; performing differential processing on the change rate of the bubble additional impedance value to generate a flow feed-forward control instruction, combining a feedback control instruction based on temperature deviation to synthesize a target rotating speed instruction, and driving an alkali liquor circulating pump to adjust the flow speed; according to the method, the bubble impedance observation model is constructed, so that zero-delay sensing and decoupling control over the state of bubbles in the electrolytic cell are achieved, hysteresis of single temperature feedback is eliminated, and the problems of actuator saturation and model aging drifting are solved.

The invention provides a modified alkaline electrolytic water hydrogen production diaphragm and a preparation method thereof. The modified diaphragm comprises a base membrane loaded with a Cu < 2 + > complexed chitosan alkali-resistant ion conduction unit, and the Cu < 2 + > complexed chitosan alkali-resistant ion conduction unit is obtained by loading chitosan through the base membrane and soaking in a Cu < 2 + > complexed solution for complexing. By introducing a copper-chitosan complex structure, a stable ionic conduction channel is constructed in an alkaline environment, and the alkali resistance and ionic conductivity of the membrane are effectively improved. According to the modified alkaline diaphragm for hydrogen production by electrolysis of water, the problems of insufficient alkali resistance, limited ion transmission capability and the like of a diaphragm material in the prior art are solved, and a new solution is provided for preparing the diaphragm for hydrogen production by electrolysis of alkaline water with long service life, high efficiency and low cost.

The invention belongs to the technical field of phosphoric acid purification, and particularly relates to a removing agent and a removing method for heavy metal cadmium in phosphoric acid. The removing agent comprises a solvent, a thiophosphoric acid trapping agent A and a thiophosphoric acid trapping agent B, wherein the thiophosphoric acid trapping agent A and the thiophosphoric acid trapping agent B are dispersed in the solvent; the thiophosphoric acid trapping agent A and the thiophosphoric acid trapping agent B are different types of thiophosphoric acid trapping agents and are respectively and independently selected from one of alkyl dithiophosphoric acid or salts thereof, phenolic dithiophosphoric acid or salts thereof and amino dithiophosphoric acid or salts thereof; and at least one hydrocarbyl dithiophosphoric acid or salt thereof is selected; the salt is sodium salt or ammonium salt; the solvent is water or an alkaline aqueous solution. According to the method, a composition of a dithiophosphoric acid trapping agent is used as a removing agent for cadmium in wet-process phosphoric acid, a precipitate which is insoluble in a strongly acidic water phase is generated after reaction, and phosphoric acid cadmium removal is realized after filtration. Compared with a conventional sulfide precipitation method, the method provided by the invention has the advantages of less cadmium residue in phosphoric acid and less pollution.

A raw material solution containing trivalent iron ions, or trivalent iron ions and ions of a metal element that partially substitutes Fe sites, and an alkaline aqueous solution for neutralizing the raw material solution are added to a reaction system to adjust the pH of the reaction system from 1.0 to 3.0 or lower. Hydroxycarboxylic acid is added to the obtained reaction solution and the pH of the reaction system is then neutralized from 7.0 to 10.0 or lower. The obtained precipitate of a substituent metal element-containing iron oxyhydroxide is coated with silicon oxide, followed by heating so as to form particles of ε-iron oxide in which Fe sites are partially substituted by other metal elements, and then, a slurry containing the particles is classified. The iron-based oxide magnetic powder has a particle shape close to a perfect sphere and is suitable for use in a magnetic recording medium.

The present invention provides an organic phosphonic acid betaine and a preparation method thereof, specifically an ammonium phosphonic acid betaine containing a glycidyl group. The organic phosphonic acid betaine can be used as a functional monomer for free radical grafting modification of the surface of a polymer material such as polyolefin, or can be mixed with acrylate, acrylonitrile or other olefin monomers for copolymerization to prepare an amphoteric ionomer. The organic phosphonic acid betaine can also be used for ring-opening grafting modification of polymer materials such as starch, cellulose, polyurethane, and polyamide containing amino or hydroxyl groups in their structures. At the same time, the phosphonic acid betaine imparts functional effects such as zwitterionization, hydrophilicity, antibacterial properties, and antifouling properties to the obtained polymer material. The organic phosphonic acid betaine also has high chemical stability in acidic and alkaline water environments.

The invention relates to the technical field of waterproof building materials, in particular to a waterproof building material. The waterproof building material is prepared from the following raw materials in parts by weight: 80-100 parts of cement, 8-15 parts of modified montmorillonite, 5-8 parts of modified konjac glucomannan, 3-5 parts of a fiber reinforced material, 1-3 parts of a coupling agent, 1-3 parts of a dispersing agent and 0.1-0.5 part of a defoaming agent. According to the invention, through the synergistic effect of various raw materials, after the montmorillonite is modified, the interlayer spacing is increased, the hydrophilicity is weakened, a nano-scale sheet-shaped barrier layer can be formed in a cement matrix, like countless tiny shields, and water molecule permeation is effectively blocked, and the modified konjac glucomannan has good water resistance in an alkaline cement environment. The water-proofing agent has a cross-linking reaction with hydrated calcium silicate and calcium hydroxide of cement to form a continuous gel network structure to fill pores and capillary channels in set cement and cut off water seepage channels, so that a good water-proofing effect of a building in a long-term humid environment is ensured.

The invention belongs to the technical field of new energy and electrochemistry, and particularly relates to a corrosion-resistant structured transition metal alloy electrode suitable for hydrogen production from alkaline water and a preparation method of the corrosion-resistant structured transition metal alloy electrode. The method comprises the following steps: sequentially carrying out sand blasting treatment and electrochemical activation treatment on a nickel net substrate so as to improve the surface roughness and the number of active sites; and then performing constant-current deposition in an electro-deposition solution containing nickel salt and ferric salt and / or cobalt salt, and constructing a nickel-based alloy catalyst layer in a micron array shape to obtain the alloy electrode. Through observation of a scanning electron microscope, the surface of the obtained electrode has a sphere-like microstructure, the arrangement is compact, and the catalytic efficiency and durability can be improved. The prepared structured alloy electrode has the advantages of being high in interface bonding force, high in electro-catalytic performance, high in alkali corrosion resistance and the like, and is suitable for efficient and long-term operation of hydrogen production through alkaline electrolysis of water.

The invention relates to the technical field of green hydrogen production, in particular to a green hydrogen production system coupling biomass electrooxidation and water reduction, which comprises a pretreatment unit, a photovoltaic power generation unit and an electrolytic bath, the pretreatment unit is used for dissolving a polyhydroxy compound in an alkaline aqueous solution to form an alkaline electrolyte containing the polyhydroxy compound; the photovoltaic power generation unit is used for providing electric energy for the electrolysis process in the electrolytic cell, the electrolytic cell comprises a shell, an ion exchange membrane, an anode plate and a cathode plate, the ion exchange membrane divides the shell into an anode chamber and a cathode chamber, the anode plate is electrically connected with the positive electrode of the photovoltaic power generation unit, and the cathode plate is electrically connected with the negative electrode of the photovoltaic power generation unit. The shell is provided with a seawater inlet and a hydrogen outlet which are communicated with the cathode chamber, and the shell is provided with a compound inlet and a chemical outlet which are communicated with the anode chamber. According to the scheme, chemicals are obtained from the anodes, the safety is high, the cell voltage needed for driving the whole electrolysis process is greatly reduced, and the energy consumption of the whole electrolysis hydrogen production process is small.

Described herein are methods for making alkenyl disiloxanes, comprising combining an alkenyl halosilane with an alkyl halosilane and adding the mixture to water, an acidic aqueous solution, or a basic aqueous solution. The ratio of the alkenyl halosilane to the alkyl halosilane is about 10:1 to about 1:10. The alkenyl halosilane and the alkyl halosilane are mixed at about 20° C. to about 45° C. The reaction product is separated and washed with saturated alkali carbonate solution.

The invention discloses an alkaline water electrolysis hydrogen production operation boundary evaluation method considering hydrogen content constraint in oxygen, and relates to the technical field of water electrolysis hydrogen production. The method comprises the following steps: analyzing a generation mechanism of gas crossing in an alkaline water electrolytic cell, according to steady-state and dynamic models of HTO gas crossing caused by diaphragm permeation and alkaline liquor mixed circulation in the electrolytic cell, and based on structural parameters represented by the volume of a gas-liquid separator and operating parameters such as working pressure, temperature, electrolyte circulation flow and the like of the electrolytic cell; the method comprises the following steps: analyzing the influence of different parameters on HTO impurity accumulation, quantifying the sensitivity coefficient of each parameter on HTO accumulation, predicting an HTO accumulation trajectory through a model, determining the safe operation range of different parameters, determining the safe operation boundary of alkaline water electrolysis hydrogen production, and constructing a parameter priority regulation and control method based on sensitivity ranking under a given operation condition. And pressure-flow-temperature parameters are determined for cooperative adjustment under the dynamic working condition, and the HTO concentration overrun risk is inhibited in real time.

The invention relates to the technical field of concrete 3D printing, in particular to modified alkali-resistant regenerated glass fiber reinforced concrete and a preparation process thereof, and the modified alkali-resistant regenerated glass fiber reinforced concrete is prepared from the following components in parts by weight: 600-650 parts of cement, 90-100 parts of fly ash, 30-35 parts of silica fume, 500-600 parts of river sand, 0.5-6 parts of modified alkali-resistant regenerated glass fibers, 10-15 parts of a water reducing agent and 120-200 parts of water. According to the invention, the regenerated glass fiber obtained by recovering the waste fan blades is used as a reinforcing material of the concrete, so that the resource consumption can be effectively reduced, and the carbon emission is reduced; the invention provides a surface modification method aiming at regenerated glass fibers, so that the long-term durability of the regenerated glass fibers in an alkaline cement matrix is enhanced, the generation of microcracks on a fiber and cement interface is reduced, and the constructability and excellent mechanical properties of the 3D printing concrete are improved. The method not only meets the requirements of digital and intelligent transformation and upgrading of the building industry, but also provides a new method for recycling of waste resources and sustainable development of the building industry, and has relatively high economic and environmental benefits.

A resist underlayer film, which, while exhibiting excellent resistance to a resist developer which is a resist solvent or an alkaline aqueous solution, exhibits removability, and preferably solubility, only in wet etching chemicals. This composition for forming a resist underlayer film contains a solvent, a heterocyclic compound having a dicyanostyryl group, a cyclic compound including an amide group, for example, and the reaction product of a heterocyclic compound precursor having an epoxy group and an active proton compound, for example.

A chemically amplified negative resist composition containing (A) a base polymer containing a polymer which contains a repeat unit having formula (A1) and a repeat unit having formula (A2), the polymer being adapted to decrease its solubility in an aqueous alkaline solution under an action of an acid.

The invention discloses a novel composite diaphragm for an alkaline water hydrogen production electrolytic cell and a preparation method. By optimizing component selection, proportion and temperature of first to fourth coagulating baths in the phase inversion process, diaphragm phase inversion kinetics is regulated and controlled, a finger-free uniform spongy pore structure is formed, and zirconium oxide surface distribution is improved. The average pore size of the prepared composite diaphragm is 0.08-0.1 mu m, the surface resistance is less than or equal to 0.22 omega.cm < 2 >, the mechanical strength is high, and the durability is good. The method solves the problems that an existing composite diaphragm is high in finger-shaped hole proportion and large in surface resistance, can be used for separating a cathode and an anode of an alkaline water hydrogen production electrolytic cell, isolating gas products and conducting ions, and improves the electrolytic efficiency.

The invention discloses a method for preparing a roadside support filling body from coal gasification ash solid waste, and belongs to the technical field of coal-based solid waste resource utilization. The roadside filling body is formed by mixing coal gangue, coal gasification ash coarse slag, coal gasification ash fine slag and alkaline water; coal gangue serves as coarse aggregate, coal gasification ash coarse slag serves as fine aggregate, and the coal gasification ash fine slag is activated to replace cement to serve as a cementing material. The coal gangue, the coal gasification ash coarse slag, the coal gasification ash fine slag and the alkaline water are mixed to prepare the roadside filling body cementing material, other cementing materials and aggregates do not need to be added, after curing is conducted for 28 days, solidification of filling slurry is achieved through the activation characteristic of the coal gasification ash, and the performance of the filling slurry meets the performance requirement of the roadside filling material. The method is low in material cost, large in solid waste disposal amount and good in environmental benefit, a new way is provided for disposal of solid waste such as coal gasification ash, and sustainable development of the coal industry can be promoted.

The invention relates to a simulation analysis-based alkaline electrolytic cell stretching net flow channel optimization method. The method comprises the following steps: 1, establishing a zero-clearance stretching net flow channel alkaline electrolytic cell numerical simulation model; 2, a free tetrahedral mesh is adopted to divide a computational domain, a boundary layer mesh is divided near a flow boundary, and angle refinement is set in a whole flow area to encrypt the density of the mesh; 3, initializing an electric field; 4, calculating a flow field; 5, thermal field calculation; 6, post-processing a result; 7, analyzing the influence of different stretching net structures on the working characteristics of the alkaline water electrolyser through multi-physics field coupling simulation, and optimizing the design scheme on the experimental basis; according to the method, the tensile net alkaline electrolytic cell model is established, the electrochemical field, the flow field and the thermal field are distributed and coupled, the reaction gas production process is simplified through the step function, the simulation calculation amount is reduced, the model convergence is better improved, the method acts on tensile net flow channel structure optimization, and the performance of the tensile net flow channel alkaline electrolytic cell is improved.

The invention provides a detection method and a detection kit for an energy metabolism related compound in a biological sample, and the detection method uses a first LC-MS detection condition and a second LC-MS detection condition to detect the energy metabolism related compound in a sample solution, the energy metabolism related compounds comprise phosphoric acid carbohydrates, amino acid compounds and organic acid compounds, an HILIC chromatographic column and an alkaline water phase mobile phase are used in the first LC-MS detection condition, a C18 chromatographic column and an acidic water phase mobile phase are used in the second LC-MS detection condition, and the C18 chromatographic column is washed with a phosphoric acid solution before being used. The detection method or the detection kit can be used for detecting energy metabolism related compounds such as phosphate carbohydrates, amino acid compounds, organic acid compounds and the like, the method is simple to operate and high in accuracy and precision, the number of the detected compounds is large, and the detection method or the detection kit can be widely applied to energy metabolism related research.

To provide a chemically amplified positive resist composition that can give a resist film which has extremely high isolated space resolution, small LER, excellent rectangularity, and on which formation of a resist pattern with suppressed etching resistance or pattern collapse is possible, and a resist pattern forming method using the chemically amplified positive resist composition.SOLUTION: A chemically amplified positive resist composition contains: (A) a base polymer which includes a repeating unit derived from hydroxystyrene or hydroxynaphthalene and a repeating unit derived from hydroxystyrene in which a hydroxy group is protected by acid-labile group or hydroxynaphthalene in which a hydroxy group is protected by acid-labile group, and in which dissolubility to alkali aqueous solution increases by acid action, and a dispersion degree is 1.0 to 1.19; (B) photo-acid generator expressed by the following formula (B); and (C) organic solvent.SELECTED DRAWING: None

The invention discloses a catalytic system for preparing amine compounds through nitro reduction and application of the catalytic system. The catalytic system comprises an alkaline aqueous solution, a reducing agent and a catalyst, the alkaline aqueous solution is an alkali metal hydroxide aqueous solution; the reducing agent is alkali metal hydroboron and / or alkaline earth metal hydroboron; the catalyst is copper salt lewis acid and / or other lewis acid; the other Lewis acid is selected from one or a combination of more of cobalt salt, ferric salt, zinc salt, manganese salt and palladium salt. When the catalytic system is used for reducing the aromatic nitro-compound, the using amount of a reducing agent is small, meanwhile, the using amount of an organic solvent is reduced, the reaction yield is high, the reaction is milder, and amplified production of the process is facilitated.

To provide a water electrolysis system and a method for operating a water electrolysis system that can further reduce electrolysis voltage.SOLUTION: The water electrolysis system is a water electrolysis system using an alkaline aqueous solution as an electrolytic solution, and comprises a cell stack to which the electrolytic solution is supplied, a storage section in which the electrolytic solution is stored, an annular flow path connecting the storage section and the cell stack, a pump section provided on the annular flow path, a scale removal section provided on the annular flow path and capable of removing scale contained in the electrolytic solution, and a scale component removal section capable of removing scale components dissolved in the electrolytic solution at or below saturation concentration.SELECTED DRAWING: Figure 1

The invention belongs to the technical field of water treatment brine reuse, and provides an electrochemistry-based brine calcium and magnesium graded extraction process, which comprises the following steps: brine enters a primary electrolysis device for electrochemical reaction, carbon dioxide is introduced, and calcium ions in the brine are precipitated; further entering a primary precipitation separation device, and intercepting and collecting precipitated calcium; then the brine enters a secondary electrolysis device, the density of current applied to an electrode is increased, and magnesium ions in the brine are precipitated; the solution enters a secondary precipitation separation device, and precipitated magnesium is intercepted and recycled; drying the separated calcium and magnesium precipitates to obtain a product; and finally, introducing the reacted effluent into an ion exchange resin chromatographic column to remove untreated calcium and magnesium ions, and applying the obtained hardness-free alkaline water to the hydrogen production industry. By regulating the current density and introducing CO2, calcium and magnesium in various kinds of saline water are respectively precipitated and extracted, and the device is suitable for salt-containing organic wastewater, seawater, seawater desalination concentrated solution, bitter brine and industrial circulating cooling water.

The invention belongs to the technical field of fish breeding, and discloses a method for creating alkali-resistant grass carp new germplasm based on a ca12 gene editing technology and application. Carbonic anhydrase ca12 is used as a target gene, a CRISPR / Cas9 gene editing technology is used for carrying out gene editing on wild grass carp, the genotype of the grass carp is identified through sequencing, ca12 gene knockout F0-generation chimera and the corresponding wild type thereof are selected to carry out carbonate alkalinity stress experiments, and based on experimental results, it is known that the ca12 knockout chimera of the grass carp has high alkali resistance, and can be used for preparing the grass carp. The invention provides a novel breeding method and germplasm material for culturing fishes suitable for alkaline water culture, and has important industrial application value.

The present invention discloses the system and method of preparation of a surface-modified crystalline blend to enhance the properties of water by optimizing its mineral composition, alkalinity, and bioavailability. The crystalline blend comprises Tourmaline, Shungite, Jade, Silica, Zeolite, Lava Stones, and Calcareous Shale, with additional minerals like Maifan, Calcite, and Dolomite to enhance water quality. The invention utilizes Bioactive Crystal Resonance Technology (BCRT), wherein individual minerals are heated below their phase transition temperature to activate them while maintaining their crystalline state providing controlled activation and ensuring a regulated release of beneficial minerals, preventing excessive increases in pH or TDS levels while significantly reducing heavy metal leaching. The system includes a perforated membrane leveraging irregularly shaped crystals ranging from 0.5 to 5mm, allowing water to interact with the modified minerals to restore essential nutrients, increase hydration efficiency, improve detoxification, alkaline water, and provide antioxidant benefits.

The invention provides acinetobacter for culturing prawns in saline-alkali water and application of the acinetobacter. The preservation number of the provided acinetobacter is CGMCC (China General Microbiological Culture Collection Center) No.36066. The acinetobacter soilis strain provided by the invention has remarkable comprehensive application advantages, can still keep higher growth activity and metabolic capability in a low-temperature environment, and continuously plays a water body purification function. Ammonia nitrogen and nitrite nitrogen in a water body can be efficiently degraded, the environment of the aquatic water body is remarkably improved by promoting the nitrogen circulation process, and harm caused by nitrogen pollution is reduced. In addition, the strain can effectively inhibit and prevent reproduction of pathogenic vibrios and reduce the occurrence risk of bacterial diseases of aquatic animals. The strain is high in safety, does not cause poison or stress reaction to bred animals even under the condition of high-concentration use, and has good ecological safety and environmental friendliness.

The invention belongs to the field of new energy nano material technology and water electrolysis hydrogen production, and particularly relates to a vacancy-rich Ru / RuSex heterostructure electrocatalyst as well as a preparation method and application of the vacancy-rich Ru / RuSex heterostructure electrocatalyst. The electrocatalyst is composed of a cubic phase RuSe2 matrix rich in selenium vacancy and metal Ru nano-particles which are uniformly distributed and stably anchored on the surface of RuSe2. The preparation method comprises the following steps: synthesizing precursor RuSe2 powder by a hydrothermal method, and carrying out Joule heating treatment on the RuSe2 powder in an inert atmosphere or a reducing atmosphere environment to obtain the vacancy-rich Ru / RuSex heterostructure electrocatalyst. The catalyst disclosed by the invention shows excellent hydrogen evolution performance under alkaline water and alkaline seawater conditions, and overpotentials of only 21 mV and 26 mV under the current density of 10 mA. Cm <-2 > are respectively realized; and the battery can stably run for 400 hours under the current density of 800mA. Cm <-2 >.

The invention aims to provide a method for preparing a carbon-zeolite composite material and co-producing a flocculating agent from coal gasification slag, and belongs to the technical field of solid waste resource utilization. An acid leaching-alkaline hydrothermal-polymerization process is adopted, and the flocculating agent is prepared by controlling the acid leaching temperature and the acid leaching concentration; acid leaching residues with different silica-alumina ratios and acid leaching solutions with different aluminum-iron concentrations are prepared; preparing the acid leaching residues with different silica-alumina ratios into a carbon-zeolite composite material containing zeolite with different silica-alumina ratios and an alkaline leaching solution under an alkaline hydrothermal condition; the acid leaching solution and the alkali leaching solution are mixed according to a specific proportion, and the polyaluminum ferric chloride flocculant is prepared through the steps of polymerization, curing, drying and the like. According to the process, the coal gasification slag is utilized to prepare the carbon-zeolite composite material with different hierarchical pore structures and the high-performance polyaluminum ferric chloride flocculant, the product performance is excellent, no secondary waste is discharged in the production process, and an innovative technical path is provided for resource high-value utilization of the coal gasification slag.

The present invention provides a water-based dispersion comprising (a) nitrogen compound selected from 3a,4,7,7a-Tetrahydro-1H-isoindole-1,3(2H)-dione and 1,3- Dihydro-2H-isoindole-1,3-dione and (b) sulfonate-based dispersant, and further provides a process for producing phthalimide based fungicide which comprises (1) preparing a water-based dispersion comprising (a) nitrogen compound such as 3 a, 4, 7,7a- Tetrahydro- 1H-isoindole-1,3 (2H)-dione and 1, 3 -Dihydro-2H-i soindole-1,3- dione and (b) sulfonate-based dispersant, (2) reacting the dispersion of step (1) with aqueous alkaline solution, (3) reacting the resulting salt with mercapto-based compound selected from perchloromethyl mercaptan (PCMM) and pentachloro ethyl mercaptan (PCEM) to obtain phthalimide based fungicide such as folpet, captan and / or captafol.

The present invention relates to a method for electroless copper depositing onto a surface of a non-conductive or carbon-fibres containing substrate, the method comprising the steps: (I) activating the surface of a non-conductive or carbon-fibres containing substrate for electroless copper depositing, the activation method using an aqueous, palladium-free activation composition comprising (i) a first species of dissolved transition metal ions which are copper ions and additionally metal particles thereof which are copper particles, (ii) one or more than one complexing agent, and (iii) permanently or temporarily one or more than one reducing agent, and (II) an enhancer treatment of the activated surface of a non-conductive or carbon-fibres containing substrate, the enhancer treatment method using an alkaline aqueous enhancer composition comprising water and a formaldehyde compound; and (III) an electroless copper depositing of the enhanced surface of a non-conductive or carbon-fibres containing substrate, the electroless copper depositing method using an electroless copper metallizing solution and substrates, and method for subsequent metallization.

The present application belongs to the technical field of phosphoric acid purification, and particularly relates to a heavy metal cadmium removal agent and a removal method for phosphoric acid. The removal agent comprises a solvent and a thiophosphoric acid type capturing agent A and a thiophosphoric acid type capturing agent B dispersed in the solvent; the thiophosphoric acid type capturing agent A and the thiophosphoric acid type capturing agent B are different types of thiophosphoric acid type capturing agents, the thiophosphoric acid type capturing agent A and the thiophosphoric acid type capturing agent B are independently selected from one of a hydrocarbyl dithiophosphoric acid or a salt thereof, a phenolic dithiophosphoric acid or a salt thereof, and an amine dithiophosphoric acid or a salt thereof, and at least one hydrocarbyl dithiophosphoric acid or a salt thereof is selected; the salt is a sodium salt or an ammonium salt; and the solvent is water or an alkaline aqueous solution. The present application uses a combination of dithiophosphoric acid type capturing agents as a cadmium removal agent for wet-process phosphoric acid, and generates a precipitate that is difficult to dissolve in a strong acidic aqueous phase after reaction, so that the cadmium in the phosphoric acid is removed after filtration. Compared with the conventional sulfide precipitation method, the present application has less cadmium residue and less pollution in the phosphoric acid.