发明授权
US4626598A Purification of terephthalic acid 失效
对苯二甲酸的纯化

Purification of terephthalic acid
摘要:
An improved method for producing purified terephthalic acid by catalytic hydrogenation is disclosed. Control of the reduction of colored compounds during the production of purified terephthalic acid is effected by modulating solution hydrogen concentration during hydrogenation.
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