WIPO logo
Mobile | Deutsch | Español | Français | 日本語 | 한국어 | Português | Русский | 中文 | العربية |
PATENTSCOPE

Search International and National Patent Collections
World Intellectual Property Organization
Search
 
Browse
 
Translate
 
Options
 
News
 
Login
 
Help
 
Machine translation
1. (WO1980000150) PROCESS FOR RECOVERING 2,2-BIS(4-HYDROXYPHENYL)PROPANE FROM AN ADDUCT OF 2,2-BIS(4-HYDROXYPHENYL)PROPANE AND PHENOL
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1980/000150    International Application No.:    PCT/US1979/000430
Publication Date: 07.02.1980 International Filing Date: 19.06.1979
IPC:
C07C 37/84 (2006.01), C07C 39/16 (2006.01)
Applicants:
Inventors:
Priority Data:
919667 27.06.1978 US
Title (EN) PROCESS FOR RECOVERING 2,2-BIS(4-HYDROXYPHENYL)PROPANE FROM AN ADDUCT OF 2,2-BIS(4-HYDROXYPHENYL)PROPANE AND PHENOL
(FR) PROCEDE DE RECUPERATION DE 2,2-BIS(4-HYDROXYPHENYL) PROPANE A PARTIR DE 2,2-BIS(4-HYDROXYPHENYL) PROPANE ET DE PHENOL
Abstract: front page image
(EN)The compound 2,2-bis(4-hydroxyphenyl) propane is recovered in the form of rhombic crystals from an essentially non-crystalline mixture comprising 2,2-bis(4-hydroxyphenyl) propane, organic by products of the condensation reaction of phenol and acetone, and phenol by lowering the temperature of the mixture from an elevated state to a temperature which is low enough to cause the separation of the phenol and 2,2-bis(4-hydroxyphenyl) propane in equimolar proportions as a crystalline adduct, recovering the adduct, forming a mixture of the adduct and water at an elevated temperature sufficient to completely melt the adduct, and thereafter lowering the temperature of the mixture of water and melted adduct to cause the separation of the 2,2-bis(4-hydroxyphenyl) propane in the form of rhombic crystals substantially free of the phenol. The crystals are easily handled and recovered by means such as filtration or centrifugation, and they can be formed into high quality polycarbonate molding resins.
(FR)Le compose 2,2-bis(4-hydroxyphenyl) propane est recupere sous forme de cristaux rhombiques a partir d"un melange essentiellement non cristallin comprenant du 2,2-bis(4-hydroxyphenyl) propane, et des derives organiques de la reaction de condensation du phenol et de l"acetone, et du phenol par abaissement de la temperature du melange depuis une temperature elevee jusqu"a une temperature qui est suffisamment basse pour provoquer la separation du phenol et du 2,2-bis(4-hydroxyphenyl) propane en proportions equimolaires comme produit d"addition cristallin, par recuperation du produit d"addition, par melange du produit d"addition et d"eau a une temperature suffisamment elevee pour diluer completement le produit d"addition, puis par abaissement de la temperature du melange d"eau et de produit d"addition dilue pour provoquer la separation du 2,2-bis(4-hydroxyphenyl) propane sous forme de cristaux rhombiques sensiblement exempts de phenol. Les cristaux sont facilement manipules et recuperes par filtration ou centrifugation, et ils peuvent etre transformes en resine de moulage de polycarbonate de haute qualite.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)