<p>A process for the preparation of an alkali metal salt of 4-chloro-4'-hydroxy benzophenone comprising of the steps of (a) preparing purified 4-chloro-4'-hydroxy benzophenone by a process comprising distilling under reduced pressure a liquid containing 4-chloro-4'-hydroxy benzophenone and a solvent selected from diphenyl sulphone, diphenylene sulphone, benzophenone and dichlorobenzophenone, and then (b) preparing the alkali metal salt of thus purifed 4-chloro-4'-hydroxy benzophenone by the reaction of the purified 4-chloro-4'-hydroxy benzophenone with a stoichiometric excess of at least one alkali metal base. There is also described a polymerization process using the alkali metal salt to yield PEK with high inherent viscosity and improved mechanical and thermal properties.</p>
申请公布号
EP2105430(A1)
申请公布日期
2009.09.30
申请号
EP20080251052
申请日期
2008.03.25
申请人
GHARDA CHEMICALS LIMITED
发明人
MALTE, ASHOKKUMAR M., DR.;MATHUR, SUCHET S., DR.;JOSEPH, P.C.;ABRAHAM, MATHEW, DR.;NAMBODARI, JANARDAN K.;LIMAYE, SANJAY C.;SATHE, SHEKHAR V.;CHAVAN, K.A.;NALADKAR, DEEPAK R., DR.;GHARDA, KEKI HORMUSJI, DR