MLchartDataset catalogue

Calcium hydroxide

Term · Oil and gas · MLC-T-OAG-000520

A strong base, Ca(OH)2, known as hydrated lime, added to water-based mud to raise pH and supply calcium ions. In lime muds the calcium exchanges onto clay and slows hydration of reactive shale, and excess undissolved lime acts as a reserve of alkalinity; lime also precipitates carbonate contamination as calcium carbonate. Its solubility is low, under 2 grams per liter at room temperature, and it falls as temperature rises.

Table 1. Record
IdentifierMLC-T-OAG-000520
FieldOil and gas
SubjectDrilling Fluids
Record as JSON 
{
  "id": "MLC-T-OAG-000520",
  "term": "Calcium hydroxide",
  "field": "Oil and gas",
  "definition": "A strong base, Ca(OH)2, known as hydrated lime, added to water-based mud to raise pH and supply calcium ions. In lime muds the calcium exchanges onto clay and slows hydration of reactive shale, and excess undissolved lime acts as a reserve of alkalinity; lime also precipitates carbonate contamination as calcium carbonate. Its solubility is low, under 2 grams per liter at room temperature, and it falls as temperature rises.",
  "subject": "Drilling Fluids",
  "url": "https://mlchart.com/terminology/oil-and-gas/calcium-hydroxide/"
}

Record 560 of 4,469 in Oil and gas terminology (MLC-0103). Request the full dataset.