Method for producing low molecular weight thioethers
Abstract
Abstract SUBSTANTIALLY OH FREE HAVING AN ENHANCED CONTENT OF METHANE-DITHIOL HSCH2SH AND MONTHIOETHER DITHIOL HSCH2SCH2SH; THE AVERAGE VALUE OF N OF THE MIXTURES IS ABOUT 1.2 TO 2.6. THE METHOD CONSISTS IN REACTION MONOTHIOETHER DIOL HOCH2SCH2OH OR FORNALDEHYDE HCHO, OR A MIXTURE OF THESE TWO COMPOUNDS, PREFERABLY IN AQUEOUS SOLUTION, WITH AT LEAST 2.5 MOLES H2S PER MOLE OF THE COMPOUNDS OR COMPOUNDS BETWEEN 20* AND 90*C.; THE PH OF THE REACTION MEDIUM IS ADJUSTED TO A VALUE COMPRISED BETWEEN 8 AND A MINIMUM WHICH IS A LINEAR FUNCTION OF TEMPERATURE, AND IS DEFINED BY THE EXTREME LIMITS: 6.8 TO 20*C. AND 3.3 AT 90*C. THE THIOETHERS FORMED ARE THEN SEPARATED BY CONVENTIONAL MEANS FROM THE REACTION MEDIUM, AFTER EXCESS H2S HAS BEEN DEGASSED. HS(CH2S)NH A METHOD IS DESCRIBED, WHICH PERMITS OF EASILY AND ECONOMICALLY PREPARING MIXTURES OF THIOETHERS
Inventors
- 👤 Yves Labat
Bibliographic Details
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