US4956486A
Expired / Lapsed
US
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Removal of organic chloride from phenylchlorosilanes
Assignee: Dow Silicones Corp
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Filing: 1990-03-07
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Granted: 1990-09-11
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Expires: 2010-03-07
Abstract
Abstract The described invention is a process for reducing residual organic chlorides in a crude phenylchlorosilane mixture. The process involves contacting the organic chloride with a Lewis acid forming material, in the presence of a phenyl source. The phenyl source can be the phenylchlorosilanes and other sources of phenyl present in the crude phenylchlorosilane mixture. The organic portion of the organic chloride forms a hydrocarbon adduct with the phenyl source. If desired, the hydrocarbon adduct can be easily separated from the phenylchlorosilanes.
Inventors
- 👤 Ollie W. Marko
- 👤 Robert D. Steinmeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:29
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/20
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
124 words
A process for reducing organic chloride content of phenylchlorosilanes, where the phenylchlorosilanes are of formula φ.sub.a Me.sub.b SiCl.sub.4-a-b ; where a=1, 2, or 3; b=0, 1, or 2,; a+b=1, 2, or 3; φ is a phenyl radical; and Me is a methyl radical; the process comprising: (A) contacting a crude mixture containing as a major portion the phenylchlorosilanes and as minor portions an organic chloride and a phenyl source, with a catalyst; where the catalyst is a Lewis acid forming material; (B) facilitating contact of the organic chloride with the catalyst and the phenyl source to convert the organic chloride to hydrocarbon adducts; (C) separating the catalyst from the phenylchlorosilanes and the hydrocarbon adducts; and (D) recovering the phenylchlorosilanes with lowered organic chloride content.
Claim 2
Dependent Claim
124 words
A process for reducing organic chloride content of phenylchlorosilanes, where the phenylchlorosilanes are of formula φ.sub.a Me.sub.b SiCl.sub.4-a-b ; where a=1, 2, or 3; b=0, 1, or 2,; a+b=1, 2, or 3; φ is a phenyl radical; and Me is a methyl radical; the process comprising: (A) contacting a crude mixture containing as a major portion the phenylchlorosilanes and as minor portions an organic chloride and a phenyl source, with a catalyst; where the catalyst is a Lewis acid forming material; (B) facilitating contact of the organic chloride with the catalyst and the phenyl source to convert the organic chloride to hydrocarbon adducts; (C) separating the catalyst from the phenylchlorosilanes and the hydrocarbon adducts; and (D) recovering the phenylchlorosilanes with lowered organic chloride content.
Claim 3
Dependent Claim
35 words
A process according to claim 1, where the catalyst is selected from a group consisting of alumina, silicaalumina mixtures, zeolites, aluminum chloride, cobalt chloride, ferric chloride, copper chloride, stannuous chloride, palladium chloride, and zirconium chloride.
Claim 4
Dependent Claim
21 words
A process according to claim 1, where the catalyst is selected from a group consisting of alumina, silicaalumina mixtures, and zeolites.
Claim 5
Dependent Claim
26 words
A process according to claim 1, where contacting the crude mixture with the catalyst is effected at a contact temperature of 75° C. to 200° C.
Claim 6
Dependent Claim
16 words
A process according to claim 4, where the contact temperature is 120° C. to 180° C.
Claim 7
Dependent Claim
25 words
A process according to claim 4, where the crude mixture is contacted with the catalyst for a contact time of one minute to two hours.
Claim 8
Dependent Claim
25 words
A process according to claim 5, where the crude mixture is contacted with the catalyst for a contact time of five minutes to one hour.
Claim 9
Dependent Claim
24 words
A process according to claim 1, where contacting the crude mixture with the catalyst is effected in a packed bed in a continuous mode.
Claim 10
Dependent Claim
21 words
A process according to claim 8, where the catalyst is selected from a group consisting of alumina, silicaalumina mixtures, and zeolites.
Claim 11
Dependent Claim
36 words
A process according to claim 9, where the crude mixture is contacted with the catalyst for a contact time of five minutes to one hour and at a contact temperature of 120° C. to 180° C.
Claim 12
Dependent Claim
22 words
A process according to claim 9, where the crude mixture contains as the major portion methylphenyldichlorosilane and as a minor portion (2-chloroethyl)benzene.
Claim 13
Dependent Claim
30 words
A process according to claim 11, where the crude mixture is contacted with alumnia at a contact temperature of about 140° C. for a contact time of about 30 minutes.
Claim 14
Dependent Claim
122 words
A process for reducing organic chloride content of phenylchlorosilanes, where the phenylchlorosilanes are of formula φ.sub.a Me.sub.b SiCl.sub.4-a-b ; where a=1, 2, or 3; b=0, 1, or 2,; a+b=1, 2, or 3; φ is a phenyl radical; and Me is a methyl radical; the process comprising: (A) contacting a crude mixture containing as a major portion the phenylchlorosilanes and as a minor portion an organic chloride, with a catalyst; where the catalyst is a Lewis acid forming material; p1 (B) facilitating contact of the organic chloride with the catalyst and the phenylchlorosilane to convert the organic chloride to hydrocarbon adducts; (C) separating the catalyst from the phenylchlorosilanes and the hydrocarbon adducts; and p1 (D) recovering the phenylchlorosilanes with lowered organic chloride content.
Claim 15
Dependent Claim
122 words
A process for reducing organic chloride content of phenylchlorosilanes, where the phenylchlorosilanes are of formula φ.sub.a Me.sub.b SiCl.sub.4-a-b ; where a=1, 2, or 3; b=0, 1, or 2,; a+b=1, 2, or 3; φ is a phenyl radical; and Me is a methyl radical; the process comprising: (A) contacting a crude mixture containing as a major portion the phenylchlorosilanes and as a minor portion an organic chloride, with a catalyst; where the catalyst is a Lewis acid forming material; p1 (B) facilitating contact of the organic chloride with the catalyst and the phenylchlorosilane to convert the organic chloride to hydrocarbon adducts; (C) separating the catalyst from the phenylchlorosilanes and the hydrocarbon adducts; and p1 (D) recovering the phenylchlorosilanes with lowered organic chloride content.
Claim 16
Dependent Claim
29 words
A process according to claim 13, where the catalyst is selected from a group consisting of alumina, silica-alumina mixtures, zeolites, aluminum chloride, cobalt chloride, palladium chloride, and zirconium chloride.
Claim 17
Dependent Claim
21 words
A process according to claim 13, where the catalyst is selected from a group consisting of alumina, silica-alumina mixtures, and zeolites.
Claim 18
Dependent Claim
24 words
A process according to claim 15, where contacting the crude mixture with the catalyst is effected in a packed bed in a continuous mode.
Claim 19
Dependent Claim
36 words
A procedss according to claim 16, where the crude mixture is contracted with the catalyst for a contact time of five minutes to one hour and at a contact temperature of 120° C. to 180° C.
Claim 20
Dependent Claim
23 words
A process according to claim 13, where the crude mixture contains as the major portion methylphenyldichlorosilane and as a minor portion (2-chloroethyl) benzene.
Claim 21
Dependent Claim
30 words
A process according to claim 18, where the crude mixture is contacted with alumina at a contact temperature of about 140° C. for a contact time of about 30 minutes.
Claim 22
Dependent Claim
19 words
A process according to claim 1, where recovering the phenylchlorosilanes with lowered organic chloride content is effected by distillation.
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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) | 1993-09-10 | 1994-03-12 | 1994-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-10 | 1998-03-12 | 1998-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-10 | 2002-03-12 | 2002-09-11 | $7700.00 | Window Closed / Lapsed |