Claims
- 1. A process for bromination of diphenylethane, which process comprises:
a) forming a mixture of at least bromine and molten diphenylethane; and b) feeding said mixture into a stirrable reaction mass comprising bromine and a bromination catalyst to form a decabromodiphenylethane product; wherein said catalyst is present in an amount within the range of from about 0.1 to about 20 weight percent, based on the weight of said diphenylethane.
- 2. A process according to claim 1 wherein said amount of catalyst is within the range of from about 2 to about 15 weight percent based on the weight of said diphenylethane.
- 3. A process according to claim 1 wherein said amount of catalyst is within the range of from about 5 to about 7 weight percent based on the weight of said diphenylethane.
- 4. A process according to claim 1 wherein said catalyst used is selected from AlCl3, AlBr3 and a mixture thereof.
- 5. A process according to claim 1 wherein said catalyst used is selected from aluminum powder, iron powder, FeCl3 and FeBr3.
- 6. A process according to claim 5 wherein said catalyst is used in combination with AlCl3 and/or AlBr3.
- 7. A process according to claim 1 wherein said mixture is fed below the surface of said reaction mass.
- 8. A process according to claim 1 further comprising:
c) recovering as a wet cake, decabromodiphenylethane product formed in b); and d) drying and grinding said wet cake and/or said decabromodiphenylethane product; wherein said dried and ground wet cake and/or said dried and ground decabromodiphenylethane product exhibits a Yellowness Index (YI), as measured by ASTM D-1925, in the range of from about 12 to about 18.
- 9. A process according to claim 8 further comprising oven-aging said dried and ground wet cake and/or said dried and ground decabromodiphenylethane product at a temperature within the range of from about 175° C. to about 290° C. for a heating time of from about 1 to about 20 hours.
- 10. A process according to claim 9 wherein said temperature is within the range of from about 230° C. to about 260° C. and said heating time is from about 3 to about 9 hours.
REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation of commonly-owned application Ser. No.10/445,554, filed May 27, 2003, which is a continuation of commonly-owned copending application Ser. No. 10/225,951, filed Aug. 21, 2002 now U.S. Pat. No. 6,603,049, issued Aug. 5, 2003 (the disclosure of which is incorporated herein by reference), which is a continuation of commonly-owned application Ser. No. 08/658,983, filed Jun. 4, 1996, now U.S. Pat. No. 6,518,468 B1 issued Feb. 11, 2003, which is a continuation of commonly-owned application Ser. No. 08/338,711, filed Nov. 14, 1994, now abandoned, which in turn is a continuation-in-part of commonly-owned application Ser. No. 08/317,792, filed Sep. 16, 1994, now abandoned.
Continuations (4)
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Number |
Date |
Country |
Parent |
10445554 |
May 2003 |
US |
Child |
10845801 |
May 2004 |
US |
Parent |
10225951 |
Aug 2002 |
US |
Child |
10445554 |
May 2003 |
US |
Parent |
08658983 |
Jun 1996 |
US |
Child |
10225951 |
Aug 2002 |
US |
Parent |
08338711 |
Nov 1994 |
US |
Child |
08658983 |
Jun 1996 |
US |
Continuation in Parts (1)
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Number |
Date |
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Parent |
08317792 |
Sep 1994 |
US |
Child |
08338711 |
Nov 1994 |
US |