30 results about "Tobias acid" patented technology

The present invention discloses a method for extracting effective component from the production waste water of Tobias acid to produce Tobias acid further, which comprises processing extraction and back extraction on the waste water of Tobias acid production, freezing and desalting strip liquor to obtain denitration liquid, evaporating, concentrating, freezing and crystallizing denitration liquid, separating to obtain mixture salt, using ammoniation and acid out processes to obtain Tobias acid with purity higher than 99.0%. The inventive preparation method has simple and reliable process, high yield, and non environment pollution, which eliminates foreigner material accumulation caused by simply recovering strip liquor to avoid affecting product quality. Each cubic meter of strip liquor can produce 60-70kg Tobias acid which purity is higher than 99%, to reduce cost, improve yield, and support simple and reliable method for further advanced treatment of waste water.

The invention relates to a production method of refined tobias acid from a tobias acid stripping solution after performing extraction-stripping in tobias acid wastewater. The invention aims at providing a method for preparing the refined tobias acid from the tobias acid wastewater, which can reduce consumption of energy and materials and also reduces the content of ammonia nitrogen and the content of strong cancerogenic substance, namely 2-naphthylamine in the wastewater. The adopted technical scheme is as follows: the method comprises the following steps of: performing acidolysis and centrifugal separation on the striping solution obtained by performing extraction-stripping on the wastewater for producing the tobias acid, and abandoning filtrate to obtain a tobias acid stripping material; heating the tobias acid stripping material, performing alkali dissolution, and then performing hot filtration to obtain a stripping material alkaline solution; performing cooling, crystallization, secondary acidolysis and centrifugal filtration on the stripping material alkaline solution to obtain a tobias acid wet product; and beating and washing the tobias acid wet product with ethanol, and performing centrifugal filtration and drying to obtain the tobias acid with the purity of not less than 97.0%. The production method disclosed by the invention can be widely applied in the technical field of preparation of the refined tobias acid from the tobias acid wastewater.

The invention relates to a controlling and resource recovering method for waste water in tobias acid production, adjusting the pH of the waste water and filtering, and making main organic matters in the waste water absorbed on resins by macroporous weakly basic resin and super-high cross-linking absorbing resin combination. And before processing, the waste water is puce, chroma of the waste water is 45000-5000mg / L, sulphonated tobias acid concentration of the waste water is 12000-15000mg / L, tobias acid and 2, 1-acid concentration of the e waste water is 6000-7000mg / L, COD concentration of the waste water is 45000-50000mg / L, and after processing, the chroma is 10-50, sulphonated tobias acid concentration <500mg / L, the TuShi acid and 2, 1-acid concentration<50mg / L, and CODcr<1500mg / L. And the resins regenerate by de-absorption of liquid alkali and water. High concentration de-absorbing liquor returns to the aminating operation segment in the tobias acid producing process and low concentration de-absorbing liquor is used in the next de-absorbing operation.

The invention relates to a preparation method of sodium tobias salt, particularly relates to a preparation method of an environment-friendly sodium tobias salt product and solves the problems that tobias acid powder obtained through the prior art is large in dust pollution and difficult to be dissolved in water. The preparation method disclosed by the invention is improved based on a conventional tobias acid production process, the steps including acidification, filter pressing, drying and the like are saved after low-temperature sulfonation, neutralization reaction and high-pressure amination reaction of 2-isonaphthol in the conventional process, a high-pressure amination reaction solution is sequentially subjected to the steps including filtration, percolation, concentration and the like, and a small amount of a sterilizing agent and an anti-freezing agent are added to obtain a liquid sodium tobias salt product which can be stably stored for more than 6 months; or a small amount of a dispersant is added, and then a particle-like sodium tobias salt product with extremely-good dispersity can be obtained through a pressure spray drying process.

The invention relates to a preparation method for a reaction red dye. The preparation method comprises the following steps: adding cyanuric chloride into ice water, and carrying out pulping treatmentso as to obtain a pulped solution; adding solid para-ester into the pulped solution, continuing adding a mixed alkaline solution so as to regulate alkalinity, and carrying out a condensation reactionso as to obtain a first condensate, wherein the mixed alkaline is sodium carbonate and baking soda; adding solid J acid into the first condensate, and carrying out a condensation reaction so as to obtain a second condensate; continuing adding solid H acid into the second condensate, and carrying out a condensation reaction so as to obtain a mixed second condensate, wherein the mol ratio of the solid J acid to the solid H acid is (0.65-0.68): (0.32-0.35); adding hydrochloric acid and sodium nitrite into sulfonated tobias acid, and carrying out a diazotization reaction so as to obtain sulfonatedtobias acid diazotized salt; and adding the sulfonated tobias acid diazotized salt into the mixed second condensate, carrying out a coupling reaction, and carrying out post-treatment so as to obtainthe reaction red dye. The preparation method provided by the invention is convenient and rapid, occupies few resources, has low energy consumption, and facilitates color matching.

The invention discloses a preparation method of a pigment used for water-based ink, which comprises the following steps: stirring 50-200 parts of water and 22 parts of sodium hydroxide, adding 22-24 parts of tobias acid and 0.1-2 parts of 2, 6 acid, dissolving, filtering, adding 28.4 parts of hydrochloric acid at the temperature of -3 to 2 DEG C, stirring, adding 30.4 parts of sodium nitrite solution, stirring at the temperature of 0-5 DEG C, adding 56 parts of calcium chloride solution, and stirring to obtain a solution I; stirring 200-720 parts of water and 24.5 parts of sodium hydroxide, adding 16 parts of 2-naphthol to dissolve at the temperature of 20-60 DEG C and filter, and adding 0.1-5.6 parts of rosin solution and 0.1-4 parts of turkey red oil solution into a filtrate at the temperature of 20-60 DEG C to obtain a solution II; adding the solution II into the solution I at the temperature of 0-5 DEG C to couple for 20 minutes, stirring for 30-60 minutes at the temperature of 10-15 DEG C, raising the temperature to 65-90 DEG C to transform completely, stirring for 10-30 minutes, filtering by pressing, washing filter cakes by water, and removing moisture in the filter cakes to obtain the pigment used for water-based ink. The viscosity stability of ink prepared from the pigment used for water-based ink disclosed by the invention is high, and after the treatment of 48 hours at the temperature of 50 DEG C, the viscosity is still basically unchanged.

The invention discloses a tobias acid production waste water controlling and resource recovering method, and the method regulates the pH value of the tobias acid production waste water, filters and makes main organic matters in the waste water absorbed on resin by the combination process of macroporous weakly basic resin and ultrahigh cross-linking absorption resin. The crude waste water: puce, chroma 1500-2000, iodinated tobias acid concentration 12000-15000 mg / L, tobias acid and 2, 1-acid concentration 6000-7000 mg / L, and COD 45000-5000 mg / L, and the processed waste water: chroma 10-50, iodinated tobias acid concentration < 500mg / L, tobias acid and 2, 1- acid concentration <50 mg / L, CODCr<1500mg / L, and the resins are regenerated by liquid alkali and water de-absorption, the high concentration deabsorption solution returns to amination stage of the tobias acid producing process, low concentration deabsorption solution is used indiscriminately in the next deabsoption operation, the sulphonated tobias acid is above 10 kg recovered from per cubic meter of waste water sample and the tobias acid is above 5 kg.

Disclosed is a process for preparing 2-bromo-6-fluoronaphthalene, wherein the raw material is a Tobias acid, and the product is obtained by bromating-debrominating, diazotizating, and thermal decomposing. The product obtained by the present process has high purity and stable quality. Moreover, in the present process, the route is simple, the reaction condition is mild, and there is no need for high pressure. Therefore, the process is suitable for industrial production.

The invention relates to a method for extracting effective component from the waste water of the mother liquor of tobias acid production to produce tobias acid, belonging to the waste pollutant resource utilization technique of environment protection field. The invention resolves the problems of prior art which simply refluxes strip liquor as impurity accumulation to affect product quality. The method comprises cooling strip liquor to -2DEG C and 20DEG C in a kettle with a jacket, keeping the temperature for 3-12h, filtering out mirabilite, concentrating the denitration liquid in a distiller,discharging steam, evaporating out 35-50% of water content, reducing temperature, precipitating at least 95% organic crystal at 35-50DEG C, centrifugally filtering to obtain hydroxyl sodium tobias acid and some wet product of sodium tobias acid, dissolving the wet product and processing ammonia complex, feeding into an ammoniation reactor for ammoniation, increasing temperature to 140-160DEG C, keeping temperature for 6-8h, discharging ammonia, reducing temperature to 100-110DEG C, transferring ammoniation liquid into am acid precipitation kettle, processing acid precipitation via hydrochloride (or dilute sulfuric acid) at 75-100DEG C until pH is 1-2, filtering and washing to obtain tobias acid particle crystals, centrifugally processing to obtain tobias acid wet product, and drying to obtain final product whose purity is higher than 97.00-99.00% (tested by HPLC).

The method discloses a method for preparing 2-amino-5-naphthol-7-sulfonic acid, and the method is implemented by using the following system. The system comprises a first synthesis reaction tower, a second synthesis reaction tower, a hydrolysis reaction tower, an adjustment reaction tower, a dissolution reaction tower, a suction filtration reaction tower, a concentration reaction tower, a third synthesis reaction tower, an acidification reaction tower, a centrifugation reaction tower, a drying reaction tower, a finished product storage tank, a wastewater treatment system, a tobias acid liquid storage tank, a sulfur trioxide gas storage tank, a concentrated sulfuric acid liquid storage tank, a sodium hydroxide solid storage tank, a hydrochloric acid liquid storage tank, and a pure water storage tank. The 2-amino-5-naphthol-7-sulfonic acid product prepared by the method disclosed by the invention has high purity which is greater than 92.8%, the moisture content is less than 1%, the crystallization rate is less than 0.5%, and the free acid is less than 5%.