公开(公告)号：US3597470A

公开(公告)日：1971-08-03

申请号：US3597470D

申请日：1968-01-24

Applicant: CELANESE CORP

Inventor： WITT ENRIQUE R ,  BLAND BOBBY J

IPC: C07C69/82

CPC classification number: C07C67/52 ,  C07C67/60 ,  C07C69/82

Abstract: A PROCESS FOR THE PURIFICATION OF BIS(2 - HYDROXYETHYL) TEREPHTHALATE COMPRISING CONTACTING A SOLUTION OF THE TEREPHTHALATE WITH SODIUM BOROHYDRIDE OR BIORANE FOLLOWED BY CRYSTALLIZATION OF THE TEREPHTHALATE FROM SOLUTION.

公开(公告)号：US3363033A

公开(公告)日：1968-01-09

申请号：US43730865

申请日：1965-03-04

Applicant: CELANESE CORP

Inventor： WITT ENRIQUE R

IPC: C07F9/12

CPC classification number: C07F9/12

公开(公告)号：US3654350A

公开(公告)日：1972-04-04

申请号：US3654350D

申请日：1970-01-14

Applicant: CELANESE CORP

Inventor： WITT ENRIQUE R ,  BLAY JORGE A

IPC: C07C51/42

CPC classification number: C07C51/42 ,  C07C63/26

Abstract: DISCLOSED HEREIN ARE SEVERAL PROCESSES FOR PURIFYING TEREPHTHALIC ACID (TPA). THE PRIMARY INVENTIVE CONCEPT DISCLOSED HEREIN EXISTS IN THE USE OF A MINOR AMOUNT OF WATER TO SUPPRESS COLOR FORMATION. A SUBSTANTIALLY HOMEGENEOUS ADMIXTURE OF TPA, A SMALL AMOUNT OF WATER, AND PREFERABLY AN AGENT, E.G. ACETIC ACID, TO PROMOTE DESTRUCTION OF 4-CARBOXYBENZALDEHYDE (CBA) IS HEATED TO THE MELTING POINT OF THE ADMIXTURE FOR A TIME SUFFICIENT TO REDUCE THE CONCENTRATION OF CBA TO THE DESIRED LEVEL.

公开(公告)号：US3385900A

公开(公告)日：1968-05-28

申请号：US43946665

申请日：1965-03-12

Applicant: CELANESE CORP

Inventor： SAMMY CARPENTER ,  WITT ENRIQUE R ,  CAHILL JR JOSEPH J

IPC: C07C43/13 ,  C07D309/10 ,  C08G18/38 ,  C08G18/50

CPC classification number: C08G18/381 ,  C07C43/137 ,  C07D309/10 ,  C08G18/5012

公开(公告)号：US3644484A

公开(公告)日：1972-02-22

申请号：US3644484D

申请日：1968-04-02

Applicant: CELANESE CORP

Inventor： WITT ENRIQUE R ,  LARKIN DONALD R

IPC: C07C67/26 ,  C07C69/80 ,  C09D7/06 ,  C09D7/12 ,  C07C69/82

CPC classification number: C07C69/80 ,  C07C67/26 ,  C08K5/10 ,  C09D7/47 ,  C09D7/63 ,  C07C69/82

Abstract: PROCESS FOR THE PRODUCTON OF BIS-HYDROXYALKYL PHTHALATES BY REACTING AN ALKYLEN OXIDE WITH A BENZENE DICARBOXYLIC ACID IN THE PRESENCE OF A CATALYST AND IN AN ALKYLSUBSTITUTED DIOXOLENE REACTION MEDIUM. FOR EXAMPLE ETHLENE OXIDE IS REACTED WITH TEREPHTHALIC ACID IN A 2ETHYL, 2-METHYL DIOXOLANE REACTION MEDIUM USING A TERTIARY AMINE CATALYST SO AS TO PRODUCE BIS(2-HYDROXYENTHYL) TEREPHTAHALATE.

公开(公告)号：US3639450A

公开(公告)日：1972-02-01

申请号：US3639450D

申请日：1968-05-29

Applicant: CELANESE CORP

Inventor： KOH LITA L ,  WITT ENRIQUE R

IPC: C07C69/82

CPC classification number: C07C67/60 ,  C07C69/82

Abstract: A PROCESS FOR TREATING IMPURE BIS-HYDROXYALKYL ESTERS OF BENZENE DICARBOXYLIC ACIDS BY TREATING A HYPOPHOSPHOROUS OR ORTHOPHOSPHOROUS ACID-CONTAINING AQUEOUS SOLUTION OF THE DIESTER WITH A CATALYST OF A GROUP VIII METAL. THIS TREATMENT REDUCES THE AMOUNT OF IMPURITIES COMPRISED OF HYDROXYALKYL ESTERS OF CARBOXYBENZALDEHYDE.

公开(公告)号：US3358045A

公开(公告)日：1967-12-12

申请号：US20094662

申请日：1962-06-08

Applicant: CELANESE CORP

Inventor： WITT ENRIQUE R

IPC: C07C37/86

CPC classification number: C07C37/86 ,  C07C39/07

公开(公告)号：US3324205A

公开(公告)日：1967-06-06

申请号：US26283363

申请日：1963-03-05

Applicant: CELANESE CORP

Inventor： SAMMY CARPENTER ,  WITT ENRIQUE R

IPC: C07F9/09 ,  C07F9/40 ,  C08K5/521 ,  C08K5/5337

CPC classification number: C08K5/5337 ,  C07F9/091 ,  C07F9/094 ,  C07F9/4075 ,  C08K5/521

公开(公告)号：US3654352A

公开(公告)日：1972-04-04

申请号：US3654352D

申请日：1969-04-02

Applicant: CELANESE CORP

Inventor： WITT ENRIQUE R ,  HUMPHREY WILLIAM J ,  SCHNIZER ARTHUR W

IPC: C07C51/487 ,  C07C51/42 ,  C07C51/48

CPC classification number: C07C51/487 ,  C07C63/26 ,  C07C63/24

Abstract: A PROCESS FOR THE PURIFICATION OF TEREPHTHALIC AND/OR ISOPHTHALIC ACID BY RECRYSTALLIZATION OF THE IMPURE ACID FROM THE SOLVENT IN THE PRESENCE OF A COMPOUND HAVING THE

>N-NH2

RADICAL.

公开(公告)号：US3567665A

公开(公告)日：1971-03-02

申请号：US3567665D

申请日：1967-11-16

Applicant: CELANESE CORP

Inventor： CARPENTER SAMMY ,  WITT ENRIQUE R ,  CAHILL JOSEPH J JR

IPC: C07C43/13 ,  C07D309/10 ,  C08G18/38 ,  C08G18/50 ,  C08G22/08 ,  C08G22/44

CPC classification number: C08G18/381 ,  C07C43/137 ,  C07D309/10 ,  C08G18/5012

Abstract: WHEREIN N REPRESENTS AN INTEGER FROM 1 TO 4.

(CH2-O-CH2-CH(-BR)-CH2-BR)N

(HO-CH2)(4-N)-(4-(HO-)TETRAHYDROPYRAN-3,3,5,5-TETRAYL)-

A FLAME-RTARDANT POLYURETHANE RESIN IS FORMED FROM A MIXTURE COMPRISING AT LEAST ONE ORGANIC POLYISOCYANATE AND AT LEAST ONE BROMINATED POLYOL ETHER WHICH CAN BE A 2, 3-DIBROMOPROPYL ETHER OF SORBITOL OR A 2,3-DIBROMOPROPYL ETHER HAVING THE GENERAL FORMULA: