Patent US4956486A successfully refreshed from Google Patents.
US4956486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of organic chloride from phenylchlorosilanes
Assignee: Dow Silicones Corp
•
Filing: 1990-03-07
•
Granted: 1990-09-11
•
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 20:42
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.
References Cited (Backward Citations)
US3168542A
Cited
JPS5039649A
Cited
SU715581A1
Cited
US4127598A
Cited
US4127598B1
Cited
US4156689A
Cited
US4827008A
Cited
US4774347A
Cited
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 |