US3887581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing iminoisoindolinone
Assignee: DIC Corp
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Filing: 1972-10-17
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Granted: 1975-06-03
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Expires: 1992-10-17
Abstract
Abstract A process for producing a 3-limino-haloisoindoline-1-one which comprises hydrolyzing a di-, tri- or tetra-halophthalonitrile in the presence of an alkali metal hydroxide or alkaline earth metal hydroxide.
Inventors
- 👤 Shoichi Kinoshita
- 👤 Masaji Oyama
- 👤 Shunjiro Takijiri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:41
CPC Classifications
C; C09; C09B; C09B57/00; C09B57/04; C07; C07D; C07D209/00; C07D209/02; C07D209/44; C07D209/50
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
58 words
A PROCESS FOR PRODUCING 3-IMINO-, DI-, OR TETRAHALOISOINDOLINE-1-ONE METAL SALTS WHICH COMPRISES REACTING A DI-, TRI- OR TETRA-HALOPHTHALONITRILE IN THE PRESENCE OF AN ALKAL METAL HYDROXIDE, AN ALKALINE EARTH METAL HYDROXIDE, OR A COMPOUND FORMING SUCH HYDROXIDES BY REACTION WITH WATER, AT A TEMPERAURE OF FROM 10 TO 100:C FOR A TIME OF FROM 0.45 TO 40 HOURS.
Claim 2
Dependent Claim
58 words
A PROCESS FOR PRODUCING 3-IMINO-, DI-, OR TETRAHALOISOINDOLINE-1-ONE METAL SALTS WHICH COMPRISES REACTING A DI-, TRI- OR TETRA-HALOPHTHALONITRILE IN THE PRESENCE OF AN ALKAL METAL HYDROXIDE, AN ALKALINE EARTH METAL HYDROXIDE, OR A COMPOUND FORMING SUCH HYDROXIDES BY REACTION WITH WATER, AT A TEMPERAURE OF FROM 10 TO 100:C FOR A TIME OF FROM 0.45 TO 40 HOURS.
Claim 3
Dependent Claim
59 words
A process for producing 3-imino-, di-, tri-, or tetra-haloisoindoline-1-one metal salts which comprises reacting a di-, tri-, or tetra-halophthalonitrile in the presence of an alkali metal hydroxide, an alkaline earth metal hydroxide, or a compound forming such hydroxides by reaction with water, at a temperature of from 10 to 100*C for a time of from 0.5 to 40 hours.
Claim 4
Dependent Claim
59 words
A process for producing 3-imino-, di-, tri-, or tetra-haloisoindoline-1-one metal salts which comprises reacting a di-, tri-, or tetra-halophthalonitrile in the presence of an alkali metal hydroxide, an alkaline earth metal hydroxide, or a compound forming such hydroxides by reaction with water, at a temperature of from 10 to 100*C for a time of from 0.5 to 40 hours.
Claim 5
Dependent Claim
39 words
The process of claim 1 in which the reaction components are dissolved or finely dispersed in a diluent or solvent selected from one of the group comprising: alcohols, ketones, ethers, aliphatic hydrocarbons, aromatic hydrocarbons, halogenated hydrocarbons, and organic bases.
Claim 6
Dependent Claim
13 words
The process of claim 2 in which the diluent or solvent is alcohol.
Claim 7
Dependent Claim
17 words
The process of claim 2 in which hydrogen peroxide or ammonia is added as a reaction promoter.
Claim 8
Dependent Claim
31 words
The process of claim 1 in which an alkali metal hydroxide or a compound forming such hydroxide by reaction with water is employed, and the reaction temperature is above room temperature.
Claim 9
Dependent Claim
24 words
The process of claim 1 in which the compound forming hydroxides by reaction with water is employed, and is a peroxide or an amide.
Claim 10
Dependent Claim
26 words
The process of claim 1 in which the 3-imino-di-, tri-, or tetra-haloisoindoline-1-one metal salt is further reacted with dilute acetic acid to eliminate the metallic moiety.
Claim 11
Dependent Claim
24 words
The process of claim 1 in which the hydroxide or hydroxide forming compound is present in an amount at least equivalent to the halophthalonitrile.
Claim 12
Dependent Claim
26 words
The process of claim 1 in which the reaction is carried out under hydrolysis conditions and continued until hydrolysis is complete, thus eliminating the metallic moiety.
References Cited (Backward Citations)
US3390149A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |