GB799287A - Stabilisation of chlorinated hydrocarbons - Google Patents
Stabilisation of chlorinated hydrocarbonsInfo
- Publication number
- GB799287A GB799287A GB2851956A GB2851956A GB799287A GB 799287 A GB799287 A GB 799287A GB 2851956 A GB2851956 A GB 2851956A GB 2851956 A GB2851956 A GB 2851956A GB 799287 A GB799287 A GB 799287A
- Authority
- GB
- United Kingdom
- Prior art keywords
- aluminium
- degreasing
- methyl
- ethyl
- propyl
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
- C23G5/02—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents
- C23G5/028—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents containing halogenated hydrocarbons
- C23G5/02854—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents containing halogenated hydrocarbons characterised by the stabilising or corrosion inhibiting additives
- C23G5/02861—Oxygen-containing compounds
- C23G5/0288—Epoxy compounds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C17/00—Preparation of halogenated hydrocarbons
- C07C17/38—Separation; Purification; Stabilisation; Use of additives
- C07C17/42—Use of additives, e.g. for stabilisation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention comprises a method of stabilizing chlorinated hydrocarbons used for degreasing metals by adding small amounts of an epoxide and of an ester, the latter having a synergistic effect. In examples, trichlorethylene refluxed in presence of aluminium and aluminium chloride to simulate degreasing conditions is stabilized with small percentages of ethyl acetate and epichlorohydrin, and the percentage of tarry decomposition products compared with unstabilized solvent; comparison of the rate of polymer formation was also made with the same stabilizers in varying proportions. The epoxides advantageously employed have the general formula: <FORM:0799287/IV (b)/1> the carbons being part of an aliphatic chain, preferably of up to 8 carbons. Esters advantageously employed are those of low molecular weight organic acids with similar monohydric alcohols, methyl, ethyl and propyl acetates and propionates being referred to. Proportions of from 1 : 10 to 10 : 1 of the additives may be used. Perchlorethylene and tetrachlorethane are referred to as solvents requiring similar stabilization.ALSO:In the degreasing of metals (especially aluminium) with a chlorinated hydrocarbon, decomposition of the latter is inhibited by incorporating therein, as additives synergistically co-operative for this purpose, a small amount of an epoxide and of an ester. Examples describe the refluxing in the presence of aluminium and aluminium chloride, to simulate normal degreasing conditions, of trichlorethylene containing epichlorhydrin and ethyl acetate. Other materials specified are: perchlorethylene, tetrachlorethane; propylene, butylene, amylene and cyclohexene oxides; methyl and propyl acetates, methyl, ethyl and propyl propionates.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP17006A DE1096711B (en) | 1956-09-15 | 1956-09-15 | Degreaser for metals |
| GB2851956A GB799287A (en) | 1956-09-18 | 1956-09-18 | Stabilisation of chlorinated hydrocarbons |
| US618181A US2818446A (en) | 1956-09-18 | 1956-10-25 | Stabilization of chlorinated hydrocarbons |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2851956A GB799287A (en) | 1956-09-18 | 1956-09-18 | Stabilisation of chlorinated hydrocarbons |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB799287A true GB799287A (en) | 1958-08-06 |
Family
ID=10276915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2851956A Expired GB799287A (en) | 1956-09-15 | 1956-09-18 | Stabilisation of chlorinated hydrocarbons |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB799287A (en) |
-
1956
- 1956-09-18 GB GB2851956A patent/GB799287A/en not_active Expired
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