1 / 6

Sweetening Processes

Sweetening Processes. Presence of sulphur compounds like H 2 S and mercaptans makes the oil sour Sour stocks have bad odour The processes by which the foul smelling sour petroleum products are converted into sweet smelling or odourless products are called sweetening processes.

merton
Télécharger la présentation

Sweetening Processes

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Sweetening Processes • Presence of sulphur compounds like H2S and mercaptans makes the oil sour • Sour stocks have bad odour • The processes by which the foul smelling sour petroleum products are converted into sweet smelling or odourless products are called sweetening processes

  2. Important Sweetening processes • Doctor’s sweetening process • Copper chloride sweetening process • Catalytic desulphurization • Hydrofining process

  3. Doctor’s sweetening process • Mercaptans present in the petroleum products are converted into disulphide by treatment with doctor’s solution and sulphur • 2RSH + Na2PbO2 => Pb(RS)2 + 2NaOH • Pb(RS)2 + S => PbS + RSSR • PbS + 2O2 => PbSO4 • PbSO4 + 4 NaOH => Na2PbO2 + Na2SO4 + 2H2O • Temp. 65 C

  4. Copper chloride sweetening process • 2CuCl2 + 2RSH => RSSR + 2HCl + Cu2Cl2 • 2Cu2Cl2 +4HCl + O2 => 4CuCl2 + 2H2O

  5. Catalytic desulphurization • Catalysts e.g. bauxite can be used to convert the sulphur containing compounds to hydrogen sulphide • Used for sweetening of gasoline and kerosine • 2RSH => RSSR + H2S

  6. Hydrofining process • Catalytic desulphurization in the presence of hydrogen • Molybednum oxide, cobalt oxide as catlyst • 350-450 C, 20-50 atm • Operating conditions for various feed stocks vary

More Related