Fatty acid is a kind of basic chemical material,is widely used for detergent,plastic,rubber,medicine,food,textile and cosmetic,etc.The usage and dosage have a stable increase and the world consumption will be 2.5 million tons per year,especially in the developing countries.         In resent years,with the rapidly development of above industries,the requirement to fatty acid of our nation has increased rapidly.According to the relativestatistic ,the productivity of nature fatty acid in our country was only 350 thousand tons(not including 120 tons soap) in 1990 with behindhand production craftwork,low product grade,low utilized value and low purity,which influence the total utilized level of fatty acid and its ramification.So the nation introduced several sets of ten thousand tons grade separate monocase fatty acid equipments from Italy successively.But the productivity and product quality of introduced equipments didn't accord with the anticipated requirement due to various reasons and the present national companies are preparing to enlarge the productivity to meet the market requirement.The present national productivity is 130000 tons per year and will be 160000 tons in 2001,which has more gap to the total requirement.The national industry monocase fatty acid supply has a big shortage yet.Due to the technical,craftwork and equipment problems,the national companies have not solved the key problems of promoting recovery rate and purity and the development of fatty acid is restricted .In order to solve these questions,we cooperated with chemical department of Qinghua university which solve the craftwork technical problem of distill fatty acid from soy bottom oil and operate the fatty acid project of 6000 tons productivity annual according to the supply of material and the reality of company.         The project was authorized and established by Shannxi economic and trade No.641 file and passed the technical certification of province scientific office 24 Dec,2000.The total planned investment is about 55 million yuan with the first period investment 17 million yuan and have been put into operation in April 2001.After finishing this project,the annual sales income will be 240 million yuan,annual profit 14 million yuan and the investment payback period will be about 5-7 years.