Carbon disulfide CS2 is used as a solvent for enhanced recovery of oil and gas from shale formations according to dozens of patents.
I know this will be a huge relief to Ed Ireland who wrote:
What is carbon disulfide? Is it associated with natural gas production?Monday, February 21, 2011 – 16:26
Here’s one example:
Process for the manufacture of carbon disulphide and use of a liquid stream comprising carbon disulphide for enhanced oil recovery
US Patent 8097230 Issued on January 17, 2012.
Mesters, Carolus Matthias Anna Maria Schoonebeek, Ronald Jan
Shell Oil Company
Carbon disulphide is known to be a suitable solvent for enhanced oil recovery by miscible flooding. In enhanced oil recovery by miscible flooding, a solvent for oil is introduced into an oil reservoir and driven through the reservoir to increase oil recovery from the reservoir beyond what can be achieved by conventional means. In U.S. Pat. No. 3,847,221 for example, the use of carbon disulphide for enhanced oil recovery from tar sands is disclosed.
METHODS FOR PRODUCING OIL AND/OR GASIPC8 Class: AE21B4322FI USPC Class: 1662701 Publication date: 03/22/2012 Patent application number: 201200675711. A method for producing oil from an underground formation comprising: injecting an enhanced oil recovery formulation into a first well in the formation, the enhanced oil recovery formulation comprising a foam; floating the foam on top of the oil, in order to force the oil towards a second well in the formation; and producing the oil and/or gas from the second well.5. The method of claim 1, further comprising injecting a second enhanced oil recovery formulation into the formation, the second enhanced oil recovery formulation being denser than the oil, further comprising floating the oil on the second enhanced oil recovery formulation.
8. The method of claim 1, wherein the enhanced oil recovery formulation comprises a gas selected from the group consisting of nitrogen, carbon dioxide, natural gas, and hydrocarbon gases other than natural gas having from one to four carbon atoms.
9. The method of claim 5, wherein the second enhanced oil recovery formulation comprises a carbon disulfide formulation.
Do you suppose this might be why the Colleyville/Southlake residents’ air sampling results showed high levels of carbon disulfide? More about that later.