Hydraulic fracturing of chemicals are used per fracturing. A typical fracture treatment uses between 3 and 12 additive chemicals. Although there may be unconventional fracturing fluids, typical chemical additives can include one or more of the following: The most common chemical used for hydraulic fracturing in the United States in 2005–2009 was methanol, while some other most widely used chemicals were isopropyl alcohol, 2-butoxyethanol, and ethylene glycol. Typical fluid types are: For slickwater fluids the use of sweeps is common. Sweeps are temporary reductions in the proppant concentration, which help ensure that the well is not overwhelmed with proppant. As the fracturing
Hydrochloric acid , Bulgarian: солна киселина, Russian: соляная кислота, , Korean: 염산, and Taiwanese: iâm-sng. Gaseous HCl was called "marine acid air". The old (pre-systematic) name "muriatic acid" has the same origin ("muriatic" means "pertaining to brine or salt", hence "muriate" means hydrochloride), and this name is still sometimes used. The name "hydrochloric acid" was coined by the French chemist Joseph Louis Gay-Lussac in 1814. Hydrochloric acid has been an important and frequently used chemical from early history and was discovered by the alchemist Jabir ibn Hayyan around the year 800 AD. Aqua regia, a mixture consisting of hydrochloric and nitric acids,