105 results about "Mineral acid" patented technology

The present invention addresses the problem of providing an acidic cleaning solution for an aluminum-based metallic material, the acidic cleaning solution being capable of suppressing foaming while achieving favorable cleaning properties. One embodiment for solving the aforementioned problem is an acidic cleaning solution for an aluminum-based metallic material that comprises 0.01-25 g / L of at least one inorganic acid selected from the group consisting of sulfuric acid, nitric acid, nitrous acid, and phosphoric acid; 0.05-4.0 g / L of trivalent iron ions; and 0.1-10 g / L of a surfactant, wherein the surfactant includes a surfactant A: a polyoxyalkylene alkyl ether having a cloud point of 80°C or more, a surfactant B: a polyoxyalkylene alkyl ether having a cloud point of 50-60°C, and a surfactant C: a polyoxyalkylene alkyl ether having a cloud point of 40°C or less, and wherein the cloud point is measured in accordance with JIS K 3211: 1990.

To provide an acidic cleaning solution for aluminum-based metal materials that can achieve desirable cleaning properties while suppressing foaming. [Solution] An acidic cleaning solution for aluminum-based metal materials comprising: 0.01 g / L to 25 g / L of at least one inorganic acid selected from the group consisting of sulfuric acid, nitric acid, nitrite, and phosphoric acid; 0.05 g / L to 4.0 g / L of trivalent iron ions; and 0.1 g / L to 10 g / L of a surfactant, wherein the surfactant comprises: surfactant A: a polyoxyalkylene alkyl ether with a cloud point of 80°C or higher; surfactant B: a polyoxyalkylene alkyl ether with a cloud point of 50°C to 60°C; and surfactant C: a polyoxyalkylene alkyl ether with a cloud point of 40°C or lower.

This invention discloses a green synthesis method for acid-base bifunctional molecular sieves and its application. The method constructs acid-base sites in a one-step synthesis, yielding a molecular sieve catalyst containing acid-base bifunctional sites. This molecular sieve exhibits high activity and stable performance, and can be used as a catalyst to catalyze the isomerization of glucose to fructose. It significantly improves conversion efficiency in reactions catalyzing the isomerization of high-concentration glucose to fructose or its conversion to methyl lactate. Furthermore, this synthesis method avoids the use of environmentally harmful fluorinated mineralizers and inorganic acids, solving the problems of complex, time-consuming, and environmentally unfriendly synthesis processes of existing acid-base bifunctional molecular sieves. It also addresses the issues of low reaction efficiency and low selectivity of existing catalysts in reactions catalyzing the conversion of high-concentration glucose.

This invention discloses a method for preparing an aromatic amine-free organic pigment yellow, comprising the following steps: S1, preparing a diazo solution by sequentially adding water, inorganic acid, and diazo components to a diazo tank, stirring and slurrying, then cooling the mixture in the diazo tank to below 0°C and adding nitrite; S2, preparing a coupling solution by sequentially adding water, inorganic alkali, and coupling components to a dissolving tank, stirring and dissolving until clear; S3, coupling reaction by adding water, acetic acid, and surfactant to a coupling tank, stirring and mixing evenly, then slowly adding the diazo solution and coupling solution simultaneously to the coupling tank for a coupling reaction; S4, pigmentation by heating to above 60°C and maintaining the temperature, adjusting the pH of the solution to alkaline; S5, filtering, washing, and drying to obtain an aromatic amine-free organic pigment yellow. This invention is applicable to the synthesis of most mono- and diazo organic pigment yellows, reducing aromatic amine residues during the synthesis process and ensuring that the organic pigment yellow product is free of aromatic amine residues.

Provided is an etchant composition including, about 3.0 wt % to about 15.0 wt % of ammonium persulfate, about 0.1 wt % to about 5.0 wt % of an inorganic acid, about 0.1 wt % to about 2.0 wt % of a fluorine-containing ammonium salt, about 0.01 wt % to about 1.5 wt % of a chlorine-containing ammonium salt, about 0.1 wt % to about 2.0 wt % of a 2-nitrogen cyclic compound, about 0.1 wt % to about 2.0 wt % of a 4-nitrogen cyclic compound, about 0.1 wt % to about 3.0 wt % of an aminosulfonic acid, and a remainder of water such that the total weight of the entire etchant composition becomes 100 wt %, wherein the weight ratio of the 4-nitrogen cyclic compound to the 2-nitrogen cyclic compound is in a range of about 1.6 to about 5.0.

This invention relates to the field of marine engineering subgrade material preparation technology, and discloses a method for preparing high-performance subgrade materials based on fly ash modification. The method includes: spraying atomized activator onto the surface of fly ash particles, using inorganic acid to etch micro-pits on the surface and depositing mineral salts in situ; mixing activated fly ash with aggregates and an alkaline activator to prepare a subgrade mixture; applying high-frequency vibration pressure during compaction to inject the activating force into the micro-pits; and utilizing the osmotic pressure difference generated by the dissolution of mineral salts to drive the hydration products to grow outward from the micro-pits. This invention, through the concentration gradient generated by the mineral salt enrichment layer, causes the hydration products to form a reverse-growth interwoven structure within the pores, achieving a shift from passive barrier to active sealing defense, thereby improving the material's mechanical anchoring strength and resistance to ion penetration in high-salt marine environments.

This invention belongs to the field of organic synthesis technology, specifically relating to a method for preparing 3-hydroxy-2-methylbenzoic acid. The method comprises the following steps: mixing 3-amino-2-methylbenzoic acid, an inorganic acid, a catalyst, and water for hydrolysis to obtain crude 3-hydroxy-2-methylbenzoic acid; extracting the crude 3-hydroxy-2-methylbenzoic acid to obtain an extract phase and a raffinate phase; and sequentially washing and concentrating the extract phase to obtain the 3-hydroxy-2-methylbenzoic acid. The method provided by this invention is simple, generates no waste, and has a relatively simple ammonium salt recovery process, making it a green and environmentally friendly synthesis process. As shown in the example data, the yield of 3-hydroxy-2-methylbenzoic acid synthesized by this invention can reach over 94%, and the purity can reach up to 98%, demonstrating good industrial value.

Provided are salts of a compound of formula (I) having an ATX inhibitory activity. The salts comprises inorganic acid salts or organic acid salts, and solid forms of the salts, such as crystal forms. The salts of the compound of formula (I) and their crystal forms according to the present disclosure have a good solubility, stability and hygroscopicity, and are more suitable for medicinal use. Moreover, their preparation methods are simple and convenient, and are suitable for large-scale production.

The application discloses a synthesis method of polyvinyl butyral resin and belongs to the technical field of synthetic resin of high polymer materials. In view of the problems of difficulty in controlling the reaction process, easy degradation of polyvinyl main chain and insufficient product performance stability in the preparation of polyvinyl butyral by using single inorganic strong acid or single organic acid catalysis in the prior art, the application introduces an organic acid and inorganic acid synergistic catalytic system in the acetal reaction process, so that the two types of acids jointly play a catalytic role in the reaction system to synergistically control the acetal reaction process. By the technical scheme, the controllability of the reaction process is improved while the acetal reaction efficiency is ensured, which is conducive to inhibiting the acid degradation of the polyvinyl main chain and improving the structural uniformity and performance stability of the obtained polyvinyl butyral. The method of the application is suitable for industrial preparation of polyvinyl butyral, and the obtained product can be applied to the fields of laminated safety glass, functional glass, photovoltaic components and paint and the like.

The invention provides a template agent and a preparation method thereof, and a macroporous ZSM-5 molecular sieve and a synthesis method thereof. The preparation method of the template agent comprises the following steps: mixing maleic anhydride, an initiator and a first organic solvent to obtain a reaction solution A, and then introducing alpha-olefin to carry out copolymerization reaction with the reaction solution A to obtain a liquid-solid mixture B; carrying out liquid-solid separation on the liquid-solid mixture B, washing an obtained solid C with a second organic solvent, and drying to obtain a product D; and carrying out ammoniation treatment on the product D to obtain the template agent E. The template agent containing the monoolefine-maleic anhydride polymer is introduced into the ZSM-5 molecular sieve through a secondary synthesis method, inorganic acid or organic acid does not need to be added in the synthesis process, the molecular sieve is easier to form, the ratio of macropores in the ZSM-5 molecular sieve is increased, and the ZSM-5 molecular sieve has high crystallinity.

This invention provides a corrosion inhibitor for high-acid environments and its preparation method. The high-acid environment refers to a corrosive environment where the mass fraction of inorganic acids (such as hydrochloric acid, sulfuric acid, or a mixture of hydrofluoric acid and hydrochloric acid) is 15% to 28%. The corrosion inhibitor is composed of the following components in parts by weight: 10-15 parts modified bis-Schiff base, 5-10 parts organic amine compound, 5-10 parts low-carbon alcohol, 1-5 parts corrosion inhibitor, and the balance being deionized water. The modified bis-Schiff base is obtained by a condensation reaction between diamines and diaromatic aldehydes. The ether-modified bis-Schiff base compound provided by this invention, in synergy with the organic amine compound and corrosion inhibitor, achieves efficient, long-lasting, and environmentally friendly protection against high-acid corrosive environments. The corrosion inhibitor provided by this invention is free of silicon, phosphorus, halogens, or other toxic and harmful heavy metals, and can form a dense organic protective layer on the metal surface, effectively inhibiting corrosion of metal equipment in high-acid environments.

The application relates to a preparation method of ZSM-5 nanosheet zeolite and belongs to the technical field of catalyst preparation. The preparation method is used for synthesizing b-axis directional growth ZSM-5 molecular sieve under a seed guiding liquid in an acid medium and a fluorine-free system. The method comprises the following steps: mixing an aluminum source, inorganic acid, inorganic alkali, a silicon source and deionized water, fully stirring to form a gel, adding a small amount of seed guiding liquid, and adjusting the pH of the synthesis gel to be between 4 and 6 by controlling the adding amount of the inorganic acid. The b-axis directional growth ZSM-5 nanosheet is obtained by crystallization treatment at a certain temperature. The method is an inorganic system synthesis in a fluorine-free system, the silicon aluminum ratio is adjustable between 30 and 120, the system is green and environmentally friendly, the cost is low, the problems of high cost, limited silicon aluminum ratio and serious environmental pollution in the fluorine-containing system and the addition of organic growth agents for synthesizing directional growth nanosheets are solved.

The application belongs to the field of industrial wastewater, and particularly relates to a double-layer filler calcium fluorophosphate crystallization deep fluorine removal system and a method thereof. The mixing distribution area of the fluidized bed system is provided with a water inlet pipe, the water inlet pipe is respectively provided with a first dosing pipe and a second dosing pipe, and the dosing pipes are connected with the water inlet pipe through a pipeline mixer. The first dosing pipe adds phosphates and inorganic acid, and the second dosing pipe adds calcium salt. Industrial fluorine-containing wastewater enters the mixing distribution area, the reagent in the first dosing pipe makes the pH value of the wastewater acidic, avoiding pipeline blockage; then the wastewater enters the pH adjusting area and contacts with the first layer of filler, the pH value of the wastewater changes to neutral to alkaline; then the wastewater enters the induced crystallization area, the fluorine ions in the wastewater generate calcium fluorophosphate crystals with the phosphates and the calcium salt on the surface of the filler, realizing efficient fluorine removal. Through the principle of acidic pH in the mixing distribution area and neutral to alkaline pH in the induced crystallization area, the application guarantees smooth water inlet and deep fluorine removal of the wastewater.

The objective of this invention is to provide a treatment agent for polyester synthetic fibers, which improves the emulsion stability when the treatment agent is prepared as an aqueous dilution, reduces the adhesion of the fiber surface to which the treatment agent has been applied, and suppresses the reduction in fiber strength. The polyester synthetic fiber treatment agent of this invention contains at least 5% by mass of a (poly)oxyalkylene derivative (A), at least 1% by mass of an inorganic acid compound (B), and at least 5% by mass of an organophosphate compound (C). The 1% by mass aqueous dilution of the polyester synthetic fiber treatment agent has a pH of 5.5 or higher and 8.5 or lower at 25°C. The inorganic acid compound (B) is selected from at least one of sulfuric acid, nitric acid, hydrochloric acid, and their salts. The organophosphate compound (C) is selected from at least one of an organophosphate having an alkyl group having 16 or more and 20 or fewer carbon atoms, and their salts.

An additive transporter, housing additive ingredients of synergists and surfactants preferably for use in a natural, weed control application, insect control application, algae removal and / or mold removal end-use application. In certain non-limiting embodiments, the transporter can be fluid soluble. Where the transporter is fluid soluble it can be added to a container / bottle having a desired amount of water and organic acid or inorganic acid causing the transporter to dissolve and release the additive ingredients for mixing with the water and organic acid. Preferably, the additive or product enhancer ingredients can be organic ingredients and can comprise, without limitation, citric acid, potassium oleate, wintergreen oil and almond oil. Potassium citrate can also be included. As the transporter dissolves the released ingredients mix with organic acids and / or inorganic acids to provide an end-use composition for eco-friendly weed control, insect control, algae removal and / or mold removal. Though not considered limiting, the transporter can be in the form of a pod, packet, pouch, capsule, carton, or cardboard / plastic / metal container.

This invention discloses a method for recycling and reusing off-grade BPA, comprising the following steps: 1) simultaneously feeding off-grade BPA and alkaline solution into a dissolving tank for mixing and dissolution to obtain a raw material solution; 2) heating the raw material solution and feeding it into a cracking reactor packed with a solid alkaline catalyst, where a cracking reaction yields a cracked liquid containing phenol base / phenol / acetone; 3) feeding the cracked liquid into a distillation column for distillation separation, obtaining acetone as a side stream and a phenol base / phenol solution as the bottom of the column; 4) feeding the phenol base / phenol solution and an inorganic acid together into a static mixer for neutralization reaction to obtain a neutralized reaction liquid; 5) feeding the neutralized reaction liquid into a separator for separation to obtain a phenol oil phase and an aqueous phase containing phenol; 6) feeding the aqueous phase containing phenol into a resin bed for adsorption to remove phenol, and discharging the wastewater after it meets the standards. This method can efficiently decompose off-grade BPA and obtain phenol and acetone in high yield.

A method for making up keratinous materials comprising the application of at least one acrylic copolymer with acetoacetate functions and a hydrophilic crosslinking agent. The present invention relates to a method for making up keratinous materials, comprising the application to said keratinous materials of at least one composition (A) comprising at least one copolymer with acetoacetate function(s) comprising repeating units derived from at least one monomer of formula (I) and at least one monomer selected from C1-C4 alkyl acrylates, C1-C4 alkyl methacrylates, at least one polyol; at least one C2-C4 alkyl acetate; at least one volatile oil, at least one C2-C4 monoalcohol; and a composition (B) comprising at least one hydrophilic crosslinking agent; an organic or mineral acid; and water; composition (A) and / or composition (B) comprising at least one particulate coloring matter.

The disclosed method for manufacturing barium titanate particles comprises: a process (i) for preparing titanium hydroxide by simultaneously neutralizing an aqueous titanium halide solution and an alkaline substance under predetermined conditions; a process (ii) for preparing a slurry of the titanium hydroxide; a process (iii) for preparing a titanium compound by adding a predetermined amount of inorganic acid and an organic acid to the slurry and then maintaining the slurry at a temperature in the range of 40 to 90°C; and a process (iv) for synthesizing barium titanate particles by hydrothermal synthesis using a raw material containing the titanium compound. The titanium compound contains amorphous titanium hydroxide and anatase-type titanium dioxide. The specific surface area of ​​the titanium compound is 250 m² / g or more.

The application belongs to the field of tungsten smelting, and particularly relates to a method for removing silicon from a crude sodium tungstate solution, comprising the following steps: S1, obtaining a crude sodium tungstate solution, adding sodium fluoride and sodium chloride into the crude sodium tungstate solution to obtain a first mixture; S2, adding an inorganic acid into the first mixture for stirring reaction to obtain a second mixture; and S3, performing solid-liquid separation on the second mixture to obtain a purified solution and a sodium hexafluorosilicate solid residue. The application proposes a sodium hexafluorosilicate precipitation method for purification process, which can effectively reduce the silicon content in the crude sodium tungstate solution to a qualified standard, has a good impurity removal effect, and simultaneously reduces the tungsten precipitation loss in the purification residue after solid-liquid separation.

Compositions and principles for use before parturition in the prophylactic treatment of hypocalcemia in ruminant animals include compositions having phosphate binders for the prophylactic treatment of parturient hypocalcemia in ruminant animals. These compositions are presented in unit dosage forms, with one or more doses administered daily to the gastrointestinal tract of the ruminant animal, or in wet form. The composition contains one or more phosphate binders and one or more nutrients selected from minerals, vitamins, and amino acids, as well as a composition that includes an inhibitor of the small intestinal Na-phosphate transporter for the prophylactic treatment of parturient hypocalcemia in ruminant animals. Phosphate binders are selected from aluminum, iron, sevelamer, and lanthanum salts, with either inorganic or organic acids, hydrates thereof, or any mixture thereof.

This invention provides an alkali-generating agent and a curable resin composition that exhibit excellent storage stability in a liquid, high catalytic activity at the desired curing temperature, and induce a curing reaction in a short time. An alkali-generating agent comprises a pyridinium cation and an anionic residue of an organic or inorganic acid, and is represented by the following formula (a). (In formula (a), A represents a divalent hydrocarbon group with 1 to 8 carbon atoms that may contain heteroatoms; R1 to R5 independently represent hydrogen atoms or electron-donating groups; R1 and R2, R2 and R3, R3 and R4, and R4 and R5 can be bonded to form a ring structure. R6 to R5...) 10 Each of the following groups independently represents a hydrogen atom, halogen atom, hydroxyl group, alkoxy group, mercapto group, sulfide group, silyl group, silanol group, nitro group, nitroso group, cyano group, sulfinic acid group, sulfonyl group, sulfonic acid group, phosphono group, oxophosphono group, phosphonyl group, phosphonate group, amino group, or ammonium group, R6 and R7, R7 and R8, R8 and R9, R9 and R 10 They can be bonded separately to form a ring structure.

The present invention relates to a process for making up keratin materials comprising the application to said keratin materials of at least a composition (A) comprising at least, at least one copolymer bearing acetoacetate function(s) comprising repeat units derived from at least one monomer of formula (I) and from at least one monomer chosen from C1-C4 alkyl acrylates, C1-C4 alkyl methacrylates; at least one polyol; at least one alkyl acetate comprising from 2 to 4 carbon atoms; at least one volatile oil; at least one C2 to C4 monoalcohol; and a composition (B) comprising at least one crosslinking agent, optionally an organic or mineral acid; and optionally water, composition (A) and / or composition (B) comprising at least one particulate dyestuff.

This invention provides a method and equipment for recovering lithium, fluorine, and aluminum from lithium-rich waste aluminum electrolyte, relating to the field of metal material recycling. The method for recovering lithium, fluorine, and aluminum from lithium-rich waste aluminum electrolyte includes the following steps: S1, the waste aluminum electrolyte is crushed, ground, sieved, and then dried for later use. The method provided by this invention utilizes ultrasonic-assisted leaching of lithium-containing waste aluminum electrolyte with organic acid (malonic acid). Compared with traditional inorganic acid leaching, organic acid has advantages such as good biodegradability, weak acidity, low corrosiveness, recyclability, and environmental friendliness. During neutralization, cryolite byproducts are obtained, which can be returned to the aluminum electrolysis cell for reuse, realizing the recycling of fluorine and aluminum. Finally, high-purity lithium phosphate is obtained through precipitation, effectively utilizing the lithium resources in the waste aluminum electrolyte.

This invention discloses a method for preparing a protonated Hβ molecular sieve catalyst using acid treatment modification, the obtained catalyst, and its application. A β molecular sieve is mixed with an ammonium chloride solution, and after sufficient ion exchange, the resulting mixture is transferred to a centrifuge tube, centrifuged, and washed several times with water. The lower solid layer is dried and ground. After grinding, the solid is placed in a crucible, which is then placed in a muffle furnace for a first calcination at high temperature, yielding an H-type β molecular sieve. The obtained H-type β molecular sieve is mixed with an inorganic acid solution, and after sufficient acid leaching, the resulting mixture is allowed to cool to room temperature, filtered, and washed several times with water. The upper solid layer is dried and ground. After grinding, the solid is placed in a crucible, which is then placed in a muffle furnace for a second calcination at high temperature, yielding a protonated Hβ molecular sieve catalyst. This invention first hydrogenates the molecular sieve and then modifies it with an acid solution to construct highly efficient and stable active sites, thereby achieving efficient NO removal.

This invention provides a method for recovering copper in which extremely high-purity copper is recovered from an aqueous solution containing copper and other valuable metals. [Solution] The copper recovery method includes a copper extraction step in which copper is extracted from an aqueous solution containing copper using an extractant containing an aldoxime; a back extraction step in which the extract obtained through the copper extraction step is mixed with a mineral acid to back extract a copper salt; and a copper oxide production step in which the copper salt obtained through the back extraction step is used to obtain copper oxide.

The application provides a cobalt acetate crystal preparation method based on waste cobalt residue and the cobalt acetate crystal. The preparation method comprises the following steps: S1, hydrogen reduction is performed on the waste cobalt residue to obtain a reduction product; S2, the reduction product is added into an inorganic acid solution, and a cobalt salt product is obtained through first stirring; S3, the cobalt salt product is added into an inorganic alkali solution, and a precipitation product and a residual liquid are obtained through second stirring; S4, the precipitation product is mixed with acetic acid, and the cobalt acetate crystal is obtained after reaction; the waste cobalt residue is a cobalt-containing waste catalyst generated in the oxidation reaction of trimethylphenol to trimethylbenzoquinone by using a supported cobalt catalyst. Through the design and optimization of the reduction, dissolution, precipitation and reaction steps of the waste cobalt residue, the waste cobalt residue is effectively utilized, the recycling of resources is realized, the cobalt acetate crystal prepared has high purity, low impurity content and good application performance.

The application discloses a preparation method of high-water-absorption and high-raise bamboo fluff pulp, and comprises the following steps: providing bamboo with a fiber weighted average length of 2.5-3.0 mm, a length weighted proportion of fine fibers of 12-20%, and a fiber width of 17-18 microns, and cutting the bamboo into bamboo chips; placing the bamboo chips in an inorganic acid solution with a mass concentration of 0.2-2%, and treating the bamboo chips at 110-120 DEG C for 30-180 min to perform dilute acid pretreatment; performing neutralization treatment on the pretreated bamboo chips, and then performing alkali cooking to obtain natural color bamboo pulp; and bleaching the natural color bamboo pulp to obtain bleached bamboo fluff pulp.

The application provides a kind of alkaline deruster and its preparation method, belong to metal surface treatment technical field.The alkaline deruster includes: base mother liquor, alkali salt, surfactant and water;The base mother liquor includes organic acid, chloride and fluoride.The alkaline deruster provided in the application does not contain volatile inorganic acid such as phosphate acid, does not contain heavy metal or harmful substance, is friendly to environment, the alkaline deruster can simplify three processes of oil removal, water washing and rust removal into one process, greatly improves production efficiency;The alkalinity of the alkaline deruster is alkaline, and the position of weld seam, clamping seam and pipe, etc. after pickling of workpiece is prone to residual reagent, and the position will not appear re-rust phenomenon caused by strong acidic derusting, corrosion is low, and has no irritating smell.

The invention relates to a preparation method of long-chain nylon salt, which comprises the following steps: pretreating dry powder or a wet filter cake of a crude product of long-chain dicarboxylic acid obtained by a fermentation method, and removing inorganic acid impurities to obtain dry powder of long-chain dicarboxylic acid to be refined; adding a mixed solvent which is a mixed solution of ethers and low-carbon alcohols, heating to dissolve the ethers and the low-carbon alcohols, and filtering to obtain a clear filtrate; adsorbing the filtrate to remove impurities, and filtering; and adding diamine into the filtrate, reacting, filtering, leaching and drying to obtain the long-chain nylon salt. According to the method disclosed by the invention, the preparation process of purifying the long-chain dibasic acid by using the organic solvent and the preparation process of the long-chain nylon salt are coupled, that is, the intermediate process product of purifying the long-chain dibasic acid by using the mixed solvent directly reacts with diamine to prepare the long-chain nylon salt; the long steps of crystallization, filtration, drying and solvent recovery for preparing the polymer-grade long-chain dicarboxylic acid product are omitted, the equipment investment is reduced, the production energy consumption is saved, and the production cost is reduced.