• What is rapeseed oil refining process?
  • Towards this, the crude rapeseed oil needs refining treatments to remove undesirable ingredients and produce higher quality oils [ 5 ¨C 7 ]. Traditional rapeseed oil refining processes generally involve four successive operations: neutralization, degumming, bleaching and deodorization.
  • Does rapeseed oil differ after refining?
  • Differences were considered statistically significant at P< 0.05. The AV, PV, p -AV of the rapeseed oil in varieties after each refining process are shown in Fig 1. The AV of five different kinds of crude rapeseed oils were from 2.15 to 3.59 mg KOH/g and decreased significantly after neutralization, ranging from 0.29 to 0.45 mg KOH/g.
  • Does rapeseed oil have physicochemical properties and oxidative stability?
  • Although many researchers have investigated the physicochemical properties of rapeseed oil, there is still a lack of information on the physicochemical properties and oxidative stability as it relates to different rapeseed varieties during refining process.
  • Are there competing interests in rapeseed oil?
  • Competing interests: The authors have declared that no competing interests exist. Rapeseed oil is a major source of vegetable oil in the world. Its production is estimated at 27.71 million metric tons, the third just behind palm and soybean oil, supporting the 2018 official data of United States Department of Agriculture.
  • Where is the largest oil refinery in the United States?
  • As of January 1, 2024, the Marathon Petroleum refinery in Galveston Bay, Texas was the largest crude oil refinery in the United States, with a refining capacity of 631,000 barrels per calendar day. The largest five oil refineries in the country are all located in the Gulf Coast (PADD 3), with four facilities in Texas and one in Louisiana.
  • Why does rapeseed oil have a low an?
  • An increase in the phosphorus content in crude rapeseed oil deteriorates the separation of oil from soapstock during refining, leading to higher losses of neutral fat that turns to soapstock. This presence of neutral fat in soapstock results in a lower acidity number (AN).