Patent US4196289A successfully refreshed from Google Patents.
US4196289A
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US
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Process for producing triallyl isocyanurate
Assignee: Mitsubishi Chemical Corp
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Filing: 1978-09-06
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Granted: 1980-04-01
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Expires: 1998-09-06
Abstract
Abstract A process for producing tri(allyl isocyanurate) by reacting an alkali cyanate and an allyl halide in an aprotic polar solvent, which comprises distilling off the solvent after the completion of the reaction, adding water or an aqueous solution of hydrogen chloride to a reaction mixture containing tri(allyl isocyanurate), forming a tri(allyl isocyanurate) layer and an aqueous layer and then separating the tri(allyl isocyanurate) layer from the aqueous layer.
Inventors
- 👤 Hiroyasu Saito
- 👤 Akio Sekiguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:21
CPC Classifications
C; C07; C07D; C07D251/00; C07D251/02; C07D251/12; C07D251/26; C07D251/30; C07D251/34
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
88 words
In a process for producing triallyl isocyanurate by reaction of an alkali cyanate and an allyl halide in the presence of an aprotic polar solvent, to form a reaction mixture comprising the triallyl isocyanurate, the aprotic polar solvent and salt by-product, the improvement comprising: distilling said reaction mixture to remove said aprotic polar solvent; adding water or an aqueous solution of hydrogen chloride to the distilled reaction mixture thereby forming a triallyl isocyanurate layer and an aqueous layer; and separating the triallyl isocyanurate layer from said aqueous layer.
Claim 2
Dependent Claim
88 words
In a process for producing triallyl isocyanurate by reaction of an alkali cyanate and an allyl halide in the presence of an aprotic polar solvent, to form a reaction mixture comprising the triallyl isocyanurate, the aprotic polar solvent and salt by-product, the improvement comprising: distilling said reaction mixture to remove said aprotic polar solvent; adding water or an aqueous solution of hydrogen chloride to the distilled reaction mixture thereby forming a triallyl isocyanurate layer and an aqueous layer; and separating the triallyl isocyanurate layer from said aqueous layer.
Claim 3
Dependent Claim
47 words
The process of claim 1, in which the reaction is effected in the presence of a salt of group II metal of the periodic table and wherein the tri(allyl isocyanurate) layer and the aqueous layer are formed by the addition of an aqueous solution of hydrogen chloride.
Claim 4
Dependent Claim
16 words
The process of claim 1, in which said solvent removal is by distillation under reduced pressure.
Claim 5
Dependent Claim
29 words
The process of claim 1 wherein water introduced within the solvent and alkali cyanate is first removed, and then the allyl halide is added to form said reaction mixture.
Claim 6
Dependent Claim
12 words
The process of claim 4 wherein said water removal is by distillation.
Claim 7
Dependent Claim
43 words
The process of claim 5 in which a solvent which forms an azeotrope with water, but which is inert to the aprotic polar solvent, is added prior to distillation and the resulting azeotropic mixture of solvent and water is removed by the distillation.
Claim 8
Dependent Claim
29 words
The process of claim 1 wherein the allyl halide is introduced into the liquid phase of the reaction mixture through a conduit in direct communication with the liquid phase.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-01 | 1983-10-01 | 1984-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-01 | 1987-10-01 | 1988-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-01 | 1991-10-01 | 1992-04-01 | $7700.00 | Window Closed / Lapsed |