US4832873A
Expired / Lapsed
US
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Process for producing polybrominated higher alkylbenzenes
Assignee: Great Lakes Chemical Corp
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Filing: 1987-10-09
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Granted: 1989-05-23
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Expires: 2007-10-09
Abstract
Abstract Polybrominated higher alkylbenzenes may be produced by reacting the corresponding hydrocarbon material with bromine chloride in an excess bromine reaction medium in the presence of an antimony halide catalyst.
Inventors
- 👤 Nicolai A. Favstritsky
- 👤 Dennis M. Borden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:27
CPC Classifications
C; C09; C09K; C09K21/00; C09K21/06; C09K21/08; C07; C07C; C07C17/00; C07C17/093; C07C17/10; C07C17/12; Y; Y10; Y10S; Y10S260/00; Y10S260/24
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
77 words
A process for producing tetra- and pentabrominated higher alkylbenzenes comprising the steps of: reacting bromine chloride with a higher alkylbenzene, wherein the alkyl group contains 6 to 18 carbon atoms, in an excess of bromine as the sole reaction medium and in the presence of an antimony halide catalyst at a temperature of about 0° to 15° C. for a time sufficient from bromination to reach at least the tetrabromo level; and recovering the product thereby produced.
Claim 2
Dependent Claim
77 words
A process for producing tetra- and pentabrominated higher alkylbenzenes comprising the steps of: reacting bromine chloride with a higher alkylbenzene, wherein the alkyl group contains 6 to 18 carbon atoms, in an excess of bromine as the sole reaction medium and in the presence of an antimony halide catalyst at a temperature of about 0° to 15° C. for a time sufficient from bromination to reach at least the tetrabromo level; and recovering the product thereby produced.
Claim 3
Dependent Claim
121 words
A process, as claimed in claim 1 wherein, the product is a compound of the structure: ##STR8## where x is 4 or 5, y is zero or 1, z is zero or 1 and w is 3 or 4; where y plus x equals 4 or 5 and where y plus w equals 4; where R 1 and R 4 are hydrogen or methyl, and R 2 , R 3 , R 5 , R 6 are independently alkyl ranging from 1 to 16 carbon atoms and where the total number of carbon atoms in each of (R 1 , R 2 and R 3 ) and (R 4 , R 5 and R 6 ) ranges from 5 to 17.
Claim 4
Dependent Claim
21 words
A process, as claimed in claim 2, wherein the product is a tetra- or penta-bromo secondary C 6 -C 18 -alkylbenzene.
Claim 5
Dependent Claim
19 words
A process, as claimed in claim 2, wherein the product is a tetra-bromo secondary or tertiary di-C 6-18 -alkylbenzene.
Claim 6
Dependent Claim
20 words
A process, as claimed in claims 3 or 4, wherein the product comprises a mixture of C 10-12 alkyl groups.
Claim 7
Dependent Claim
23 words
A process, as claimed in claims 3 or 4, wherein the the product is a liquid mixture of C 10-12 tetra- and penta-bromoalkylbenzenes.
Claim 8
Dependent Claim
23 words
A process, as claimed in claim 1, wherein at least about a 100 percent excess of bromine is utilized as the reaction medium.
Claim 9
Dependent Claim
14 words
A process, as claimed in claim 1, wherein the antimony halide is antimony trichloride.
Claim 10
Dependent Claim
25 words
A process, as claimed in claim 1, wherein the bromine chloride is produced in situ by addition of chlorine gas to the bromine reaction medium.
Claim 11
Dependent Claim
22 words
A process, as claimed in claim 1, wherein the polybrominated higher alkylbenzenes comprise about 30 to 70 per cent bromine by weight.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-22 | 1992-11-21 | 1993-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-22 | 1996-11-21 | 1997-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-22 | 2000-11-21 | 2001-05-23 | $7700.00 | Window Closed / Lapsed |