دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: Na2CrO4. See chromate.

n: A type of salt in which chromium atoms are in the plus-6 valence state, such as potassium chromate, K2CrO4. Chromium compounds of various types have been used in lignite and lignosulfonate and other mud additives to enhance thermal stability. Since the la

n: A type of salt in which chromium atoms are in the plus-7 valence state, such as potassium dichromate, K2Cr2O7.

n: It is a kind of good mud thinner and calcium remover.

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

n: A group of salts formed by neutralization of phosphorous or phosphoric acid with a base, such as NaOH or KOH. Orthophosphates are phosphoric acid (H3PO4) salts, where 1, 2 or 3 of the hydrogen ions are neutralized. Neutralization with NaOH gives three sod

n: a synthetic highmolecular- weight polymer of acrylonitrile used primarily as a fluid loss-control agent.

n: Linear, anionic polymer made from the monomer acrylic acid, CH2=CHCOO- H+. The acrylic acid groups are evenly spaced along the chain. Acrylic acid polymer neutralized with NaOH is sodium polyacrylate (SPA). Polyacrylates are best utilized in soft water wi

n: It is made of two or more sodium phosphate by oxygen .