# US 4,392,000 A · Stabilized compositions of chlorinated solvents

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- Number: US 4,392,000 A
- Document ID: US4392000A
- Status: Granted
- Kind: A
- Application number: 06/312,814
- Filed: 1981-10-19
- Granted: 1983-07-05
- Earliest claimed: 1980-10-23
- Assignees: Solvay & Cie
- Inventors: Andre' Ryckaert; Michel Servais
- Web page: https://patentgrep.com/patent/US4392000A

## CPC

- C09K 15/30: containing heterocyclic ring with at least one nitrogen atom as ring member
- C07C 17/42: Use of additives, e.g. for stabilisation
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS

## Abstract

The invention relates to compositions of chlorinated solvents such as 1,1,1-trichloroethane, stabilized by means of a heterocyclic compound containing oxaziridine units, such as 2-tert.-butyloxaziridine.

## Claims

### Claim 1

A stabilized composition containing a chlorinated solvent, which is stabilized by means of a heterocyclic compound containing an oxaziridine ring.

### Claim 2 (depends on 1)

Composition according to claim 1, wherein the heterocyclic compound corresponds to the general formula ##STR3## in which R.sub.1, R.sub.2 and R.sub.3 are different or identical, organic or inorganic radicals.

### Claim 3 (depends on 1, 2)

Composition according to claim 1 or 2, wherein R.sub.1, R.sub.2 and R.sub.3 are chosen from amongst the hydrogen atom, alkyl radicals containing from 1 to 8 carbon atoms and aromatic radicals containing not more than 8 carbon atoms.

### Claim 4 (depends on 1, 2)

Composition according to either one of claims 1 or 2, wherein at least one of the radicals R.sub.1, R.sub.2 or R.sub.3 is a branched alkyl radical.

### Claim 5 (depends on 4)

Composition according to claim 4, wherein at least R.sub.3 is a branched alkyl radical.

### Claim 6 (depends on 1)

Composition according to claim 1, wherein the heterocyclic compound is 2-tert.-butyloxaziridine, 2-tert.-amyloxaziridine or 2-isopropyloxaziridine.

### Claim 7 (depends on 1)

Composition according to claim 1, wherein the heterocyclic compound is present in an amount of 0.001 mol to 0.5 mol per liter of chlorinated solvent.

### Claim 8 (depends on 7)

Composition according to claim 7, wherein the heterocyclic compound is present in an amount of 0.01 to 0.2 mol per liter of chlorinated solvent.

### Claim 9 (depends on 1)

Composition according to claim 1, wherein the chlorinated solvent is 1,1,1-trichloroethane.

### Claim 10 (depends on 9)

Composition according to claim 9, which contains, as a co-stabilizer, a saturated aliphatic alcohol, an unsaturated aliphatic alcohol and a nitroalkane.

### Claim 11 (depends on 2)

Composition according to claim 2, wherein the heterocyclic compound in present in an amount of 0.001 mol to 0.5 mol per liter of chlorinated solvent.

### Claim 12 (depends on 3)

Composition according to claim 3, wherein the heterocyclic compound in present in an amount of 0.001 mol to 0.5 mol per liter of chlorinated solvent.

### Claim 13 (depends on 4)

Composition according to claim 4, wherein the heterocyclic compound in present in an amount of 0.001 mol to 0.5 mol per liter of chlorinated solvent.

### Claim 14 (depends on 2)

Composition according to claim 2, wherein the chlorinated solvent is 1,1,1-trichloroethane.

### Claim 15 (depends on 14)

Composition according to claim 14, wherein the heterocyclic compound is present in an amount of 0.001 mol to 0.5 mol per liter of chlorinated solvent.

### Claim 16 (depends on 15)

Composition according to claim 15, wherein R.sub.1, R.sub.2 and R.sub.3 are chosen from amongst the hydrogen atom, alkyl radicals containing from 1 to 8 carbon atoms and aromatic radicals containing not more than 8 carbon atoms.

### Claim 17 (depends on 15)

Composition according to claim 15, which contains, as a co-stabilizer, a saturated aliphatic alcohol, an unsaturated aliphatic alcohol and a nitroalkane.