SUBSTANTIALLY PURE SPIROBIINDANE BISPHENOLS AND METHOD FOR THEIR PREPARATION
Spirobiindane bisphenols of high purity, suitable for conversion to high molecular weight polycarbonates, are prepared by reacting a bisphenol or 4-isopropenylphenol with a metal halide Lewis acid or an alkanesulfonic acid, followed by removing impurities including phenols, 1-(4-hydroxyphenyl)indano...
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| creator | LYNCH, JERRY CHARLES FALER, GARY RAY |
| description | Spirobiindane bisphenols of high purity, suitable for conversion to high molecular weight polycarbonates, are prepared by reacting a bisphenol or 4-isopropenylphenol with a metal halide Lewis acid or an alkanesulfonic acid, followed by removing impurities including phenols, 1-(4-hydroxyphenyl)indanols and the like. A step of purification by precipitation with water from a methanol-methylene chloride solution is included. |
| format | Patent |
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A step of purification by precipitation with water from a methanol-methylene chloride solution is included.</abstract><oa>free_for_read</oa></addata></record> |
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| language | eng |
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| subjects | ACYCLIC OR CARBOCYCLIC COMPOUNDS APPARATUS THEREFOR CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOSITIONS BASED THEREON GENERAL METHODS OF ORGANIC CHEMISTRY MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC CHEMISTRY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR PREPARATION OR CHEMICAL WORKING-UP THEIR RELEVANT APPARATUS TRANSPORTING |
| title | SUBSTANTIALLY PURE SPIROBIINDANE BISPHENOLS AND METHOD FOR THEIR PREPARATION |
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