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- W57747104 abstract "In the fall of 1984, Chevron started up a new plant in Richmond, California, to make high-V.I. lube base oils. After about eight months onstream, the heavy neutral product became hazy. The haze was caused by wax which had leaked into the oil through tiny holes in the canvas filter cloths at the solvent dewaxing plant. The haze was difficult to detect and control because it required many days to form and it resulted from parts per million quantities of wax. The haze problem was intermittent and unpredictable, occurring as filter cloths aged. Consequently, the solvent dewaxing plant was limited in capacity and flexibility because of the need to reprocess hazy oil. To improve operating economics and product quality, Chevron developed a dehazing process. The process uses a catalyst downstream of the solvent dewaxer to remove inadvertent wax contaminants. The catalyst was loaded in the upper portion of an existing hydrofinishing reactor so that there were no expenditures for new equipment. Since the process went onstream in the fall of 1985, the heavy neutral lube oil has been consistently haze free." @default.
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- W57747104 date "1987-01-01" @default.
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- W57747104 title "Catalytic dehazing of heavy lube oil - A chevron case history" @default.
- W57747104 hasPublicationYear "1987" @default.
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