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Process for production of sulfur-containing phenols

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专利汇可以提供Process for production of sulfur-containing phenols专利检索,专利查询,专利分析的服务。并且A new process for the preparation of 4,4''-thiobis(2,6-di-tbutylphenol) is disclosed. Hindered phenol, 2,6-di-t-butylphenol, is reacted with a sulfur chloride in the absence or presence of a catalytic amount of iron powder or a Lewis acid and the reaction product is then heated with caustic alkali in a solvent. The process yields 4,4''-thiobis(2,6-di-t-butylphenol) economically and in a high yield.,下面是Process for production of sulfur-containing phenols专利的具体信息内容。

  • 2. A process for preparing 4,4''-thiobis(2,6-di-t-butylphenol according to claim 1, wherein the reaction of 2,6-di-t-butylphenol with a sulfur chloride is conducted in the presence of a catalytic amount of iron powder.
  • 3. A process for preparing 4,4''-thiobis(2,6-di-t-butylphenol according to claim 1, wherein the reaction of 2,6-di-t-butylphenol with a sulfur chloride is conducted in the presence of a catalytic amount of Lewis acid.
  • 4. A process according to claim 1, wherein said hydroxide is selected from the group consisting of potassium hydroxide and sodium hydroxide.
  • 5. A process according to claim 1, wherein said sulfur chloride is selected from the group consisting of sulfur monochloride and sulfur dichloride.
  • 6. A process according to claim 2, wherein the amount of said catalyst is in the range of 0.0001 mole to 10 mole percent based on the sulfur chloride.
  • 7. A process according to claim 1, wherein the solvent for use in the first step is selected from the group consisting of acetonitrile, carbon disulfide and carbon tetrachloride.
  • 8. A process according to claim 1 wherein the solvent in the second step is methyl alcohol.
  • 9. A process according to claim 1 wherein the solvent in the second step is ethyl alcohol.
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