<p>A process for the production of terephthalic acid comprises subjecting polyalkylene terephthalate to hydrolysis using a ratio of water to polyalkylene terephthalate in the mixture prior to heating and carrying out the reaction under conditions such that, at the reaction temperature, a significant proportion of the terephthalic acid produced is in the solid phase. The degree of recrystallisation necessary to recover the terephthalic acid produced is thereby reduced. The reaction can with advantage be carried out with alkylene glycol present in the mixture prior to hydrolysis.</p>
申请公布号
DE69222285(T2)
申请公布日期
1998.01.22
申请号
DE1992622285T
申请日期
1992.12.15
申请人
IMPERIAL CHEMICAL INDUSTRIES PLC, LONDON, GB
发明人
ROYALL, DAVID JOHN, GUISBOROUGH, CLEVELAND TS14 8JJ, GB;HARVIE, JAMES LUMSDEN, MIDDLESBROUGH, CLEVELAND TS9 6VY, GB