US4870193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing spiro-orthocarbonate
Assignee: Toagosei Co Ltd
•
Filing: 1985-09-03
•
Granted: 1989-09-26
•
Expires: 2005-09-03
Abstract
Abstract A process for producing spiro-orthocarbonate having glycol unit (2) is described, which comprises reacting a spiro-orthocarbonate having glycol unit (1) which is different from glycol unit (2), with a glycol having glycol unit (2) to release a glycol having glycol unit (1).
Inventors
- 👤 Hiromu Taguchi
- 👤 Kiyokazu Mizutani
- 👤 Hiroyuki Kato
- 👤 Takeshi Endo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:43
CPC Classifications
C; C07; C07D; C07D493/00; C07D493/02; C07D493/10
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
41 words
A process for producing a spiro-orthocarbonate having glycol unit (2), which comrises reacting a spiro-orthocarbonate having glycol unit (1) which is different from glycol unit (2), with a glycol having glycol unit (2) to release a glycol having glycol unit (1).
Claim 2
Dependent Claim
41 words
A process for producing a spiro-orthocarbonate having glycol unit (2), which comrises reacting a spiro-orthocarbonate having glycol unit (1) which is different from glycol unit (2), with a glycol having glycol unit (2) to release a glycol having glycol unit (1).
Claim 3
Dependent Claim
28 words
A process according to claim 1, wherein the glycol having glycol unit (2) has a higher boiling point than that of the released glycol having glycol unit (1).
Claim 4
Dependent Claim
21 words
A process according to claim 2, wherein the reaction is carried out while removing the released glycol having glycol unit (1).
Claim 5
Dependent Claim
19 words
A process according to claim 1, wherein the spiro-orthocarbonate having glycol unit (1) is 1,4,6,9-tetraoxaspiro[4.4]nonane or a derivative thereof.
Claim 6
Dependent Claim
19 words
A process according to claim 2, wherein the spiro-orthocarbonate having glycol unit (1) is 1,4,6,9-tetraoxaspiro[4.4]nonane or a derivative thereof.
Claim 7
Dependent Claim
19 words
A process according to claim 3, wherein the spiro-orthocarbonate having glycol unit (1) is 1,4,6,9-tetraoxaspiro[4.4]nonane or a derivative thereof.
Claim 8
Dependent Claim
15 words
A process according to claim 4, wherein the glycol having glycol unit (2) is 1,3-diol.
Claim 9
Dependent Claim
16 words
A process according to claim 5, wherein the glycol having glycol unit (2) is a 1,3-diol.
Claim 10
Dependent Claim
16 words
A process according to claim 6, wherein the glycol having glycol unit (2) is a 1,3-diol.
Claim 11
Dependent Claim
13 words
A process according to claim 7, wherein an ester interchange catalyst is used.
Claim 12
Dependent Claim
13 words
A process according to claim 8, wherein an ester interchange catalyst is used.
Claim 13
Dependent Claim
13 words
A process according to claim 9, wherein an ester interchange catalyst is used.
Claim 14
Dependent Claim
20 words
A process according to claim 3, wherein the glycol having glycol unit (1) is removed by distillation with a solvent.
Claim 15
Dependent Claim
32 words
A process according to claim 13, wherein the solvent is selected from the group consisting of chlorobenzene, toluene, anisole, methylcyclohexane, isopentyl acetate, heptane, styrene, ethylbenzene, o-xylene, m-xylene, p-xylene, propylbenzene, tetrachloroethylene, and 1,1,2,2-tetrachloroethane.
Claim 16
Dependent Claim
31 words
A process according to claim 1, wherein the glycol having glycol unit (2) used in an amount of 6 mols or less per mol of the spiro-orthocarbonate having glycol unit (1).
Claim 17
Dependent Claim
33 words
A process according to claim 1, wherein the glycol having glycol unit (2) is used in an amount of from 0.7 to 2.4 mols per mol of the spiro-orthocarbonate having glycol unit (1).
Claim 18
Dependent Claim
34 words
A process according to claim 10, wherein the catalyst is selected from the group consisting of p-toluenesulfonic acid, a cation-exchange resin, benzoic acid, acetic acid, sulfuric acid, phosphoric acid, zinc chloride, and aluminum chloride.
Claim 19
Dependent Claim
31 words
A process as in claim 10, wherein the catalyst is used in an amount of from 0.001 to 5 mol%, based on the amount of the spiro-orthocarbonate having glycol unit (1).
Claim 20
Dependent Claim
31 words
A process as in claim 10, wherein the catalyst is used in an amount of from 0.1 to 2 mol%, based on the amount of the spiro-orthocarbonate having glycol unit (1).
References Cited (Backward Citations)
US3379693A
Cited
DE3225818A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-25 | 1993-03-27 | 1993-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-25 | 1997-03-27 | 1997-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-25 | 2001-03-27 | 2001-09-26 | $7700.00 | Window Closed / Lapsed |