Topic
Anhydrous
About: Anhydrous is a research topic. Over the lifetime, 17632 publications have been published within this topic receiving 163495 citations.
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Patent•
14 Feb 1984
TL;DR: In this article, a perhydro compound (e.g., 1-azatricyclo undecane), a raw material compound, is blended with anhydrous hydrofluoric acid, and dissolved in it.
Abstract: NEW MATERIAL:A compound shown by the formula (l, m and n are 0, 1, 2, or 3 with the proviso that any one of l, m, and n is 1, 2, or 3) EXAMPLE:Perfluoro-1-azatricyclo[6210 ]undecane USE:Blood substitute, or an oxygen transporting material such as oxygen transporting liquid PROCESS:For example, a perhydro compound (eg, 1-azatricyclo [6210 ] undecane, etc), a raw material compound, is blended with anhydrous hydrofluoric acid, and dissolved in it The solution is electrolyzed in an electrolytic cell in an inert gas atmosphere at 7-12 degC bath temperature After the electrolysis is over, since hydrofluoric acid of the upper layer is separated from fluorocarbons of the lower layer, the lower layer is separated and collected It is treated with an aqueous solution of sodium hydroxide, the lowermost layer is separated, and distilled, to give a compound shown by the formula
2 citations
Patent•
02 Oct 2013
TL;DR: In this article, the authors proposed a comprehensive utilization method for ferrous sulfate comprehensive utilization, which comprises the following steps of 1, dissolving FeSO4.7H2O as a raw material by steam to obtain a solution, 2, heating the solution for 2 to 4h to respectively obtain steam and a mixture of H2O and FeSO 4.
Abstract: The invention relates to a ferrous sulfate comprehensive utilization method. The ferrous sulfate comprehensive utilization method comprises the following steps of 1, dissolving FeSO4.7H2O as a raw material by steam to obtain a solution, 2, heating the solution for 2 to 4h to respectively obtain steam and a mixture of FeSO4.H2O and FeSO4, cooling the steam into water and recovering the water, 3, carrying out suction filtration of the mixture of FeSO4.H2O and FeSO4 to respectively obtain a mother liquor and a dry material, 4, calcining the dry material to respectively obtain iron oxide red and impurity-containing SO2 gas, and crushing the iron oxide red into an iron oxide red finished product, 5, carrying out spray purification of the impurity-containing SO2 gas orderly by first-grade and second-grade washing towers and removing spray to obtain purified SO2 gas, 6, carrying out a reaction of the purified SO2 gas and a sodium carbonate solution to respectively obtain CO2 gas and a sodium bisulfate solution, 7, carrying out a neutralization reaction of the sodium bisulfate solution and the sodium carbonate solution to obtain a sodium sulfite solution, and 8, carrying out condensation and separation of the sodium sulfite solution and carrying out drying to constant weight to obtain an anhydrous sodium sulfite finished product. The ferrous sulfate comprehensive utilization method realizes recovery and use of all resources and has a high resource comprehensive utilization rate.
2 citations
Patent•
22 Feb 2017
TL;DR: In this paper, the preparation of methyl p-tolyl sulfone from components of raw and auxiliary materials in parts by weight as follows: 200 parts of water, 29 parts of sodium carbonate, 33 parts of anhydrous sodium sulfite, 45 parts of paratoluensulfonyl chloride, 1 part of activated carbon, 3 parts of Sodium hydroxide and 16 parts of chloromethane.
Abstract: The invention discloses methyl p-tolyl sulfone and a preparation method. Methyl p-tolyl sulfone is prepared from components of raw and auxiliary materials in parts by weight as follows: 200 parts of water, 29 parts of sodium carbonate, 33 parts of anhydrous sodium sulfite, 45 parts of paratoluensulfonyl chloride, 1 part of activated carbon, 3 parts of sodium hydroxide and 16 parts of chloromethane. The preparation method comprises steps as follows: a) water is added to a salt formation kettle in proportion, stirring is started, sodium carbonate, anhydrous sodium sulfite and paratoluensulfonyl chloride are added once in proportion after heating, and the materials naturally react after a manhole is tightly closed; b) steam is introduced, heating and thermal insulation are performed, and a paratoluensulfonyl chloride solution is prepared; c) activated carbon is added in proportion during stirring, hot filtration is performed during stirring, and the mixture is subjected to direct replacement and then enters a methylation reaction kettle; d) steam is introduced, heating is performed, a chloromethane pipeline valve is opened for a methylation reaction; a methylation reduction reaction is performed again after thermal insulation; e) sodium hydroxide is sucked once for a neutralization reaction; f) the mixture is transferred into a centrifugal machine to be spin-dried and then transferred into an oven to be dried.
2 citations
Patent•
08 Mar 2017
TL;DR: In this article, a method for high pressure continuous carboxylation synthesis of salicylic acid is presented, which comprises the steps: with 2,5-dichlorophenol xylene solution having the mass fraction of 25%-45% and a potassium hydroxide solution as raw materials, in a solvent xylene and under a reflux condition, carrying out a reaction to synthesize 2.
Abstract: The invention discloses a method for high pressure continuous carboxylation synthesis of salicylic acid; the method comprises the steps: with 2,5-dichlorophenol xylene solution having the mass fraction of 25%-45% and a potassium hydroxide solution as raw materials, in a solvent xylene and under a reflux condition, carrying out a reaction to synthesize 2,5-dichlorophenol potassium; mixing the xylene solution containing 2,5-dichlorophenol potassium with potassium carbonate and an alcohol catalyst by a mixer, then sending the mixture into a high-pressure reaction kettle or loop reactor, introducing CO2 into the high-pressure reaction kettle or loop reactor, carrying out a reaction of 2,5-dichlorophenol potassium, anhydrous potassium carbonate and CO2 for 3-10 h in the presence of the alcohol catalyst, to generate 3,6-dichloro potassium salicylate, and controlling the CO2 pressure to be 5.5-10 MPa and the reaction temperature to be 135-160 DEG C; and after the reaction is finished, discharging while feeding, releasing the pressure and continuously discharging by using a spray gun pipeline during discharge, acidifying the synthesis liquid via hydrochloric acid, and centrifuging to obtain the target product salicylic acid. The method can realize the purpose of continuous production through improvement of the catalyst, the feeding ratio of the reaction materials and the material discharge mode, and improves the production efficiency of the reaction equipment.
2 citations
Patent•
22 Jan 2014
TL;DR: In this article, a preparation method of a benzoxazine intermediate containing a maleimide bisphenol A-type structure is described, which includes the steps of adding an aldehyde compound and a solvent into a reaction vessel to uniformly mix at room temperature and normal pressure, then, adding an amine compound into the vessel under stirring, and reacting at the temperature of 0-100 DEG C and normalpressure for at least 10h.
Abstract: The invention discloses a preparation method of a benzoxazine intermediate containing a maleimide bisphenol A-type structure. The preparation method comprises the steps: (1) adding an aldehyde compound and a solvent into a reaction vessel to uniformly mix at room temperature and normal pressure, then, adding an amine compound into the vessel under stirring, and reacting at the temperature of 0-100 DEG C and normal pressure for at least 10h; (2) pouring the reaction solution into a cleaning solution to clean, filtering and collecting a solid substance, and drying at the temperature of 30-100 DEG C; (3) sequentially adding the obtained solid substance, the aldehyde compound and bisphenol A into a reaction vessel to uniformly mix, heating to 160 DEG C, and reacting for at least 7h under stirring to obtain a brown solid product; (4) dissolving the brown solid product by using a proper amount of ethyl acetate, extracting, collecting an ethyl acetate solution, and then, washing the solution to be neutral by using a 6% sodium bicarbonate solution and tap water; (5) drying the obtained ethyl acetate extracting solution by using anhydrous MgSO4, filtering, and rotatably evaporating the solution at the temperature of 45 DEG C to obtain the yellow solid target product.
2 citations