| 摘要 |
<p>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.</p> |
