Patent ID: 9718758
Date: 2017-08-01
CPC Classifications: C07C,C08K

Claim:
1. A method of reducing the ultraviolet-light absorbing properties of a composition comprising dioctyl phthalate, the method comprising: (a) obtaining a composition comprising dioctyl phthalate and phthalide, wherein said composition has an absorbance of greater than 0.1 at a wavelength of about from 230 to 360 nm; (b) contacting the composition with an activated carbon or a silica containing material for a sufficient amount of time to allow the phthalide to contact the activated carbon or the silica containing material; and (c) removing the composition from the activated carbon or the silica containing material, wherein the composition obtained from step (c) has an absorbance equal to or less than about 0.1 at a wavelength of about from 230 to 360 nm, and has a reduced amount of phthalide when compared with the composition from step (a), wherein the activated carbon, when present, has an average particle size of 0.15 to 130 millimeters, and wherein the silica containing material, when present, is a diatomaceous earth comprising at least about 85 weight percent silica, a silica gel, or a combination thereof.