Patent ID: 11952467
Assignee: NATIONAL TAIWAN UNIVERSITY
Field: Other special machines (Mechanical engineering)
Classification: CPC C  Y | IPC C

Claim 6:
7. The method as claimed in claim 5, wherein the physical decolorization treatment is conducted using a decolorization composition including at least one decolorization agent selected from the group consisting of ethylene glycol,, where R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X12, X13, X14, Y1, Y2, Y3, Y4, Y5, Y6, Y7, Y8, Y9, Y10, Y11, Y12, Z1, Z2, Z3, Z4, Z5, Z6, Z7, Z8, Z9, Z10, Z11, Z12, Z13, Z14, Z15, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17 and T18 are independently selected from the group consisting of hydrogen and a hydrocarbon group.