| 摘要 |
A process of purifying tris(1- hydroxy-3-methyl-6-tert. butyl phenyl) butane comprises crystallising it from an aromatic hydrocarbon having 6 to 9 carbon atoms to produce a product containing said hydrocarbon and removing at least part of the hydrocarbon from the product by washing it with a liquid consisting essentially of at least one water miscible alcohol and water.
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