107-96-0Relevant articles and documents
Reduction Potentials and Exchange Reactions of Thiyl Radicals and Disulfide Anion Radicals
Surdhar, Parminder S.,Armstrong, David A.
, p. 6532 - 6537 (1987)
Redox equilibria between RS. and -S-S-- radicals, and between these types of radical and phenoxyl and chlorpromazine (ClPz.2+) radicals, have been investigated in aqueous solutions at pHs over the range 6-10 to obtain a self-consistent set of redox potentials for the reactions PhO. + H+ + e- = PhOH (4), RSS.R + 2H+ + e- = 2RSH (11), and RS. + H+ + e- = RSH (18), in sulfur systems with alkyl R groups.Absolute standard potentials were calculated on the of E0 = 0.83 V for the chlorpromazine couple.The results for E04 (=1.35 +/- 0.02 V) and E018 (=1.33 +/- 0.02 V) were in agreement with values calculated from thermodynamic data within the known uncertainties.E018 was found to exhibit a falloff when electron-rich groups, such as the two methyls of penicillamine or the CO2- of β-mercaptoacetic acid, were present on the carbon adjacent to the S atom.However, the effect was relatively small (ca. 10-14 mV).E011 was 1.72 +/- 0.02 V for β-mercaptoethanol.The corresponding potentials for the cyclic anions of dithiothreitol, dithioerythritol, and lipoamide were the same within experimental error, but the uncertainties were larger (+/- 0.04 V).For the reaction e- + -S-S- = -S-S-- (22), the magnitude of E022 was calculated to be -1.60 V, showing that only strongly reducing species could donate electrons to disulfide.Rate constants for several of the forward and backward reactions in the equilibria were also determined.
Method for synthesizing 3-mercaptopropionic acid from acidic waste gas
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Paragraph 0027; 0031-0035; 0037; 0041-0047; 0051-0055; 0057, (2020/05/01)
The invention relates to the technical field of sulfhydryl compound synthesis, and in particular, relates to a method for synthesizing 3-mercaptopropionic acid from acid waste gas. The method comprises the steps: firstly, purifying hydrogen sulfide in the acidic waste gas by a pressure swing adsorption method; secondly, synthesizing 3-mercaptopropionic acid: step 1, selecting materials; step 2, carrying out a first-step reaction; step 3, carrying out a second-step reaction; and step 4, carrying out a third-step reaction. According to the method for synthesizing the 3-mercaptopropionic acid from the acid waste gas, hydrogen sulfide in the acid waste gas discharged from an oil refinery is adopted, waste is turned into wealth, reasonable utilization of resources is taken as guidance, and the3-mercaptopropionic acid is synthesized with a low-cost and less-'three wastes' method. According to the method, acrylic acid and the hydrogen sulfide product obtained in the first step are used as raw materials, triethylamine is used as a catalyst, and dimethylacetamide is used as a solvent, so that the reaction conversion rate is high, the yield is high, byproducts are reduced, the traditional process route is broken through, the problem of three wastes caused by acidification and extraction is avoided, and the method is an excellent synthesis and post-treatment route.
Thiourea derivative and thiohydracrylic acid parallel production method
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Paragraph 0053; 0054, (2019/03/25)
The invention belongs to the technical field of organic synthesis and particularly discloses a thiourea derivative and thiohydracrylic acid parallel production method. The thiourea derivative and thiohydracrylic acid parallel production method comprises neutralizing and aminolyzing S-acrylic-dithiocarbamate in aqueous or organic solvent to obtain thiourea derivatives and the by-product of 3-mercapto propionate, wherein the 3-mercapto propionate is acidized into 3-mercapto propionic acid. The thiourea derivative and thiohydracrylic acid parallel production method provides a practical method forsynthesis of the thiourea derivatives and the 3-mercapto propionic acid and has the advantages of being mild in reaction, short in reaction time, simple in technical process and high in yield of thethiourea derivatives and the 3-mercapto propionic acid, thereby achieving certain industrial economic values.