| http://www.w3.org/ns/prov#value | - In a fixed bed process, the hydrotreatments designed to eliminate impurities such as sulphur, nitrogen or metals, and to reduce the average boiling point of these hydrocarbons are normally carried out at a temperature of about 320??? C. to about 450??? C., preferably about 350??? C. to 430??? C., at a partial pressure of hydrogen of about 3 MPa (megapascals) to about 30 MPa, preferably 5 to 20 MPa
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