The Dutch firm behind haggis maker Hall's of Broxburn is selling its UK businesses, which employ 13,000 people at 38 sites across the country.
Vion said the sale would allow it "to concentrate on its core markets in the Netherlands and Germany and the development of its global ingredients business".
The company began the closure of Hall's of Broxburn meat processing plant in West Lothian last month after rejecting two last-minute bids for the business. Vion said neither of the offers was a "viable and sustainable alternative" to the closure.
The Hall's factory is making losses of £79,000 a day and is due to close by February with the loss of 1,700 jobs.
Vion said it is confident it will sell its UK pork, red meat and poultry business units as viable businesses. They include Key Country Foods, Tranfield and Grampian Country Food Group.
Peter Barr, chairman of Vion UK, said: "Working with our advisers Rabobank-Rothschild, we have already started detailed discussions with a number of interested parties, including management, regarding the acquisition of the various parts of the UK business and these are progressing well.
"The level of interest in the businesses has been strong and we hope to be in a position in the near future to give further details about the progress which has been made.
"The sale process will be completed in a smooth and orderly fashion to ensure business continuity for our employees, agricultural and other suppliers, and our customers."
The company supplies beef, lamb, pork and chicken products to a range of food retailers and manufacturers.
Last month, Vion announced that it had agreed the sale of its US-based Banner Pharmacaps, a manufacturer and developer of soft gel caps for the pharmaceutical industry.
