دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a method of improved recovery in which alkaline chemicals such as sodium hydroxide are injected during a water flood or combined with polymer flooding. The chemicals react with the natural acid present in certain crude oils to form surfactants within the reservoir. The surfactants enable the water to move additional quantities of oil from the depleted reservoir. Compare chemical flooding, polymer flooding, water flooding.

n: a substance capable of reacting with an acid to form a salt. A typical base is sodium hydroxide (caustic),with the chemical formula NaOH. For example, sodium hydroxide combines with hydrochloric acid to form sodium chloride (a salt) and water. This reaction is written chemically as NaOH + HCl -+ NaCI + H2O.

a strong base chemical. Caustic soda is sodium hydroxide.

n: sodium hydroxide, NaOH. It is used to maintain an alkaline pH in drilling mud and in petroleum fractions.

n: See sodium hydroxide.

n: a vessel holding sodium hydroxide or other alkalis through which a solution flows for removal of sulphides, mercaptans, or acids.

sodium hydroxide.

n: a compound that is formed (along with water) by the reaction of an acid with abase. A common salt (table salt) is sodium chloride, Naa, derived by combining hydrochloric acid, Ha, with sodium hydroxide, NaOH. The result is sodium chloride and water, H2O. This process is written chemically as Ha + NaOH ~ NaCI + H2O. Another salt is calcium sulfate, CaS�4, obtained when sulfuric acid, H2SO4 is combined with calcium hydroxide, Ca (OH)2

n: see caustic soda.

n: The common name for sodium hydroxide [NaOH]. Caustic soda is used in most water-base muds to increase and maintain pH and alkalinity. It is a hazardous material to handle because it is very caustic and gives off heat when dissolved in water. Proper traini