Ion exchange resin catalyst for the synthesis of bisphenols and the process for preparing the same
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United States of America Patent
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Jun 2, 1998
Grant Date -
N/A
app pub date -
Oct 23, 1995
filing date -
Oct 25, 1994
priority date (Note) -
Expired
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Abstract
An ion exchange resin catalyst containing sulfonated styrene-divinylbenzene copolymer, a porous structure with micropore area and transfer pass networks, the transfer pass network is composed of main pass networks and branch pass networks, in non-swollen state, the pore size of the main pass network is 9.times.10.sup.3 -38.times.10.sup.3 nanometer and the pore size of the branch pass network is 20-150 manometer, the pore size of the micropore area pass is 5-20 nanometer, wherein the pore capacity of the micropore pass with the pore size of 5-10.4 nm is more than 50% of the total pore capacity of the micropore area, and the ratio of the pore capacity of the micropore area to that of the transfer network area is 0.25-1.1. The catalyst is useful to condense phenols with ketones.
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