115 results about "PHENOLSULFONIC ACID" patented technology

The invention belongs to the field of tin chemical engineering and in particular relates to a method for preparing a stable tin methanesulfonate solution. The method comprises the steps of preparing anode and cathode sheets from refined tin, adding stabilizers into methanesulfonic acid to prepare an anolyte, adding electroplating additives into methanesulfonic acid to prepare the catholyte, shade, separating the anolyte from the catholyte by an anion separator, preparing a crude tin methanesulfonate solution by a direct current electric melting method, and concentrating the crude tin methanesulfonate solution in vacuum under the protection of inert gas to obtain the stable tin methanesulfonate solution, wherein the stabilizers are phenol, ascorbic acid or tartaric acid and the electroplating additives are phenol sulphonic acid, latex, gelatin, cresol, aloin, cresylic acid or beta-naphthol. The stable tin methanesulfonate solution prepared by the method disclosed by the invention has the characteristics of stable quality and no precipitation, is difficult to oxidize and discolor, and has the advantages of simple preparation process, low cost, environment friendliness and the like, and good popularization and application value are achieved.

The invention relates to an accessory ingredient capable of removing and avoiding generating hexavalent chromium in leather and a preparation method of the accessory ingredient, belonging to the technical field of chemical product manufacture. The accessory ingredient is mainly and technologically characterized by being prepared from raw materials including a reducing agent, an antioxidant, a dispersing agent, a masking agent and a pH value regulator. The reducing agent mainly comprises the following components: sodium sulfite, sodium hydrogen sulfite, sodium hyposulfate, sodium pyrosulfite and glucose; the antioxidant comprises the following components: sulfonated tannin extract, sulfited tannin extract, tea polyphenol, gallic acid, ellagic acid, vitamin C and vitamin E; the dispersing agent comprises the following components: an auxiliary naphthalene sulfonic acid synthetic tanning agent and an auxiliary phenolsulfonic acid synthetic tanning agent; the masking agent mainly comprises the following components: sodium formate, sodium acetate and sodium citrate; and the pH value regulator comprises the following components: citric acid and oxalic acid. The accessory ingredient is prepared through grinding, crushing and uniformly mixing. The accessory ingredient is few in raw material component, simpler in preparation method, free of pollution and capable of thoroughly removing and avoiding generating hexavalent chromium in leather.

The invention belongs to the field of new materials and discloses precoated sand. The precoated sand is prepared from silica sand, pyrite powder, phenolic resin, bisphenol-A epoxy resin, phenolsulfonic acid, short peptide, boric acid, molybdenum disulfide, a methenamine solution, zinc stearate, dolomite powder, talcum powder and graphite powder. The invention also discloses a burn-free regeneration technology of the used precoated sand. The precoated sand prepared by the technoloyg has relatively high hot tensile strength, low gas-forming property and stable storage property; and the rejection rate of castings is relatively low.

The present invention discloses liquid quaternary ammonium salts that can be used to treat and coat the surfaces of the proppant sand or inorganic particles that are used in down-hole oil well fracturing operations as well as the containment structure and that these treated surfaces will cause water and oils to flow faster through the porous structure. These liquid quaternary ammonium salts can be chosen from a list that includes but is not limited to cocobis(2-hydroxyethyl)ethylammonium ethyl sulfate, benzylcocobis(hydroxyethyl)ammonium 2-ethyl-hexylsulfate, dibenzylcocobishydroxyethyl ammonium phenolsulfonate, didecyldimethyl-ammonium dodecylbenzenesulfonate and tallow-bis(2-hydroxyethyl)ethylammonium ethyl sulfate.

The invention relates to a furane self-hardening sand, comprising crude sand, binding agent, curing agent, coupling agent and lubricating agent, wherein the dosage of the curing agent is 40-60% of that of the binding agent, the dosage of the coupling agent is 0.1-0.5% of that of the binding agent, the dosage of the binding agent is 1-1.5% of that of the crude sand, the dosage of the lubricating agent is 2-4% of that of the crude sand, and the binding agent comprises the following components according to parts by weight: 60-70 parts of furane resin, 20-30 parts of phenolic aldehyde resin, and 5-15 parts of PEO resin; the curing agent comprises the following components according to parts by weight: 60-70 parts of sulfuric acid triacetin, 20-30 parts of phenolsulfonic acid, and 5-15 parts of phosphoric acid; the soil content of the crude sand is less than or equal to 0.4%; the water content is less than or equal to 0.5%; the tensile strength of the furane self-hardening sand is more than or equal to 0.7MPa; and the gas evolution is less than or equal to 14ml/g. The invention is not only high in strength and good in permeability, but also strong in fire resistance.

The invention provides an electrically conductive polyaniline composition comprising polyaniline which contains at least one of novolac resins selected from the group consisting of phenolsulfonic acid novolac resin and naphtholsulfonic acid novolac resin as a dopant. The electrically conductive polyaniline composition is obtained by contacting polyaniline with an aqueous solution of the novolac resin to dope the polyaniline with the novolac resin. The invention further provides an electrically conductive polyaniline film which comprises the polyaniline containing the novolac resin as a dopant. The electrically conductive polyaniline film is obtained by contacting film of polyaniline with an aqueous solution of the novolac resin to dope the polyaniline.

The invention discloses a leather retaining-filling agent prepared by means of phenolsulfonic acid hydrolysis leather-making waste. According to the retaining-filling agent, a phenolic compound is firstly molten, and then sulfuric acid is added for sulfonation; then cooling is carried out, and after obtained phenolsulfonic acid is diluted with deionized water, leather-making waste is added for a hydrolysis reaction; and then a phenolic solution is added dropwise for a condensation reaction, and after the reactant is sequentially subjected to neutralization with alkali, concentration adjustment with deionized water and cooling, the phenolsulfonic acid-protein hydrolysate condensation composite retaining-filling agent is obtained. The obtained leather retaining-filling agent has the property of an aromatic synthetic tanning agent, has the performance of protein filler, is a novel composite performance leather retaining-filling agent and has a good retaining-filling effect on cowhide and sheepskin. The preparing process is simple, cost is low, the resource of chromium is fully utilized, environment pollution caused by emission is reduced, and double benefits are achieved.

The invention discloses a sodium nitrite determination method. The method comprises the following steps: taking a water sample to be determined, standing the water sample to be determined for 30min, transferring 10.0mL of the above obtained supernatant into a 25mL colorimetric pipe through a pipet, sequentially adding 1.0mL of an aqueous potassium bromide solution, 1.0mL of an aqueous sulfanilic acid solution and 1.0mL of an aqueous hydrochloric acid solution, shaking up, and standing to obtain a solution of diazo salt of the sample to be determined; taking a 25mL volumetric flask, and adding 3mL of an aqueous sodium carbonate solution and 1.0mL of an aqueous 2-N-ethyl-5-naphthol-7-sulfonic acid solution; transferring the solution of diazo salt of the sample to be determined into the volumetric flask, adding deionized water to a certain volume, and determining the absorbance of the above obtained orange diazo compound solution at a wavelength of 480nm by using 1cm cuvette with a blank reagent as a reference; and calculating according to the curve regression equation of standard sodium nitrite to obtain the content of sodium nitrite in the sample to be determined. The determination method has the advantages of convenient operation, high sensitivity, accurate result, and small toxicity of used reagents.

The invention relates to a preparation method of a sulfone bridge type synthetic tanning agent, which comprises the following steps: reacting phenol and fuming sulfuric acid to obtain a first reaction solution, wherein a main product of the first reaction solution is p-phenolsulfonic acid; performing vacuum reduced pressure distillation on the first reaction solution to remove fractions, thus obtaining a second reaction solution, wherein a main product of the second reaction solution is 4,4'-dihydroxydiphenylsulfone; and adding fuming sulfuric acid into the second reaction solution, thus obtaining a third reaction solution, wherein a main product of the third reaction solution is 3,3'-sulfo-4,4'-dihydroxydiphenylsulfone, and the third reaction solution is the sulfone bridge type synthetic tanning agent. The sulfone bridge type synthetic tanning agent prepared by the invention has fewer byproducts; and the produced leather has favorable grain effect and hand feeling.

The invention relates to a preparation method of a dispersant with high efficiency and low formaldehyde, which is mainly used for assisting leather chemicals, i.e. a retanning agent and the like, to disperse in leathers when the leathers are processed and tanned. The method is characterized by comprising the following steps: (1) the synthetic reaction of a naphthalene sulfonic acid (A), i.e. firstly, adding naphthalene into a reaction kettle, and dripping a sulphuric acid into the reaction kettle to generate the naphthalene sulfonic acid (A); (2) the synthetic reaction of a phenolsulfonic acid (B), i.e. adding phenol into the reaction kettle, and dripping the sulphuric acid into the reaction kettle to generate the phenolsulfonic acid (B); (3) mixing the naphthalene sulfonic acid (A) and the phenolsulfonic acid (B), adding a right amount of water into the mixture for dilution, controlling the acidity of the mixed solution, then adding formaldehyde into the mixed solution, controlling the temperature of the mixed solution from 95 DEG C to 100 DEG C, preserving the temperature of the mixed solution for 8-9 hours, and then neutralizing the mixed solution to a pH value from 7.5 to 8.5 by NaOH; and (4) adding a formaldehyde trapping agent into the mixed solution so as to obtain an offwhite powdery dispersant finish product with high efficiency and low formaldehyde after drying processing, wherein the formaldehyde trapping agent is soyabean protein powder, isinglass, carbamide, melamine, quadrol, polyene and polyamine or diethylenetriamine. The dispersant with high efficiency and low formaldehyde has lighter colour and luster, strong dispersion force and little content of free formaldehyde.

In an antifouling papermaker's fabric woven from a warp and weft made of synthetic resin filament, the fabric is coated with a resin composition made by blending a two-liquid reaction type epoxy resin with a prepolymer of phenolsulfonic acid as a curing agent to form on the surface of a constituent yarn an antifouling coating film constituted by a reaction product of the composition.

The invention relates to a high stability composite guaiacol phenolsulfonic acid oral liquid and a preparation method thereof, and belongs to the technical field of pharmaceutics. The oral liquid is prepared by adopting promethazine hydrochloride, guaiacol phenolsulfonic acid, ammonium chloride, sodium citrate, benzoic acid, ethylparaben, cane sugar, caramel, Litchi chinensis essence and banana essence as raw and auxiliary materials, adding an antioxidant cysteine hydrochloride or vitamin C and adopting ethanol and water as a solvent. According to the invention, deficiencies of conventional formula are improved, and the antioxidant is added to effectively prevent promethazine hydrochloride form being oxidized. The guaiacol phenolsulfonic acid oral liquid prepared by the formula and process is high in stability in the placing process, so that the medicine quality and medication safety of patients can be effectively ensured.

The invention discloses a dehydration control method for synthesis of bisphenol S, which is implemented by calculating a theoretical amount of dehydrated water according to a synthetic reaction equation of the bisphenol S and the feeding molar ratio of phenols and sulfuric acid; and controlling the early stage of the reaction to be in a rapid dehydration state and the late stage of the reaction to be in a slow dehydration state, wherein preferably, in one third of the dehydration process, 75-85% of water is dehydrated, and in the rest two thirds of the dehydration process, 25-15% of water is further dehydrated. The purity of the bisphenol S after being refined is 99.5% or over, and the chromaticity is less than 20 (platinum-cobalt colorimetric method). By controlling the dehydration speed in the process of bisphenol S synthesis, the excessive oxidation of phenols and phenolsulfonic acid can be avoided, and the purity of bisphenol S in a crude product can be improved. A synthetic bisphenol S crude-product is shallow in appearance color and low in chromaticity; and the purity of the bisphenol S crude-product is relatively high, so that the bisphenol S crude-product is easily further decolored, refined and purified.

The invention relates to a pretreatment method for combined detecting on gas chromatograph and mass spectrum of a powdered essence. The method is characterized by comprising the following steps of: after crushing and drying a powdered essence sample, weighing the essence sample into a 50 mL centrifuge tube with a plug, adding anhydrous sodium sulfate into the tube to be vortex stirred and mixed evenly, adding an acetone/n-hexane extracting solution, vortex stirring and ultrasonically extracting twice, centrifuging to remove suspended particles, taking the supernatant liquor into a centrifuge tube, adding phenolsulfonic acid (PSA) and anhydrous magnesium sulfate to carry out purifying treatment, vortex mixing and ultrasonically extracting, and centrifuging to take the supernatant liquor, so that a liquor to be detected which is used for detecting the ingredients of the essence by a gas Chromatography and mass spectrometer is obtained. The sample pretreatment method adopted by the invention is easy to operate, short in time and good in reproducibility, and can obviously improve the experiment efficiency.

The invention discloses an environment-friendly color fading resisting agent which is prepared from, by weight, 3-7 parts of sodium silicate, 10-20 parts of phenol, 12-15 parts of phenolsulfonic acid, 7-9 parts of composite catalyst, 12-18 parts of brine, 7-11 parts of cocoon silk and 2-4 parts of modifying agent. The composite catalyst is the mixture of potassium hydroxide and boric acid. Silkworm cocoons are soaked in warm water for 1-2 h, and one layer of silk on the outer surface of the soaked silkworm cocoons is drawn to become cocoon silk. According to the color fading resisting agent, the phenol, the phenolsulfonic acid and the composite catalyst are adopted for a condensation reaction, the modifying agent is added into the mixture for modification, and the acid reaction resisting type color fading resisting agent is obtained; chemical damage is small, the brine has the certain color fixing effect on the fabric, alkaloid in mulberry leaf water has the antibacterial effect on the fabric, and the cocoon silk can increase the color brilliance of the fabric.

The invention discloses an anti-fading plastic for color woven bag production, and belongs to the technical field of woven bag production. The anti-fading plastic comprises the following raw materialsby weight: 5-20 parts of polymethyl methacrylate, 4-15 parts of polycarbonate, 3-12 parts of a phase solvent, 6-12 parts of tea polyphenol, 3-8 parts of acetic acid, 5-9 parts of brine, 8-18 parts ofmulberry leaf water, 4-12 parts of sodium silicate, 10-15 parts of phenolsulfonic acid, and 2-9 parts of a composite catalyst. The specific preparation method of the anti-fading plastic comprises thefollowing steps: equipment treatment and burdening: cleaning used container equipment with tap water, and performing washing with deionized water once. The anti-fading plastic has the advantages of the good anti-fading effect, the good optical performance, the good chemical corrosion resistance, no shedding, fading or other phenomena, good chemical stability and strong tinting strength; and the anti-fading plastic is low in material cost and high in environmental protection property, and has an antibacterial effect on fabrics.

The invention relates to an environment-friendly oilfield reinjection water corrosion and scale inhibitor and a preparation method thereof, and belongs to the technical field of petroleum additives. The environment-friendly oilfield reinjection water corrosion and scale inhibitor is prepared by using an erycibe obtusifolia extract, dihydro arteannuic acid methyl ester, citric acid, tannic acid, sodium hydrosulfuryl benzothiazole, gluconic acid-delta-lactone, potassium guaiacolsulfonate, sulfosuccinate, N-(3-triethoxysilylpropyl)gluconamide, ethyl acetate, ethanol and water as raw materials through a series of steps. The prepared corrosion and scale inhibitor has excellent scale inhibition performance and corrosion inhibition performance; through experiment measurement, the corrosion inhibition rate is greater than or equal to 97%, and the scale inhibition rate is greater than or equal to 96%. The preparation method is simple, and the prepared environment-friendly oilfield reinjection water corrosion and scale inhibitor is phosphine-free, environment-friendly, and excellent in thermostability. The condition required by the preparation process is easy to control, the energy consumption is low, the operation is simple, the preparation process is free of discharge of the 'three wastes', and belongs to the cleaner production technology, and popularization and application are facilitated.

The invention discloses an online dust cleaning device and an online dust cleaning method for an anode plate of an electrical dust remover. The online dust cleaning is performed by virtue of a spray-rinsing agent. The spray-rinsing agent comprises the following components in percentage by weight: 1-5% of dodecyl mercaptan ethoxylate, 1-5% of dodecylphenol sulfonic isopropylamine salt, 1-5% of potassium hydroxide, 3-8% of ethylene glycol monobutyl ether, 5-10% of sodium metasilicate pentahydrate, 1-5% of sodium phosphate and the balance of water. In addition, the invention also discloses the online dust cleaning device and the online dust cleaning method for the anode plate of the electrical dust remover by using the spray-rinsing agent. The online dust cleaning method has the characterized that production halts is not needed, the dust cleaning is completely and cleanly performed, secondary dust raising is hardly caused and the production efficiency is increased during the cleaning.

The invention provides a phenolsulfonic acid aryl ester represented by formula (1)

wherein each symbol is as defined in the description. The phenolsulfonic acid aryl ester is useful as a developer to provide a thermal recording material with good color-developing sensitivity, image density when printed at a low application energy (i.e., high start-up sensitivity), and heat and plasticizer resistance. The invention also provides a thermal recording material using the developer.