Patent EP0180561A1 successfully refreshed from Google Patents.
EP0180561A1
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A method for mechanically working cobalt-containing metal, and a concentrate suitable, after dilution with water, for use in said method
Assignee: GASTROL LIMITED TE SWINDON, GROOT-BRITTANNIE.
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Filing: 1985-10-02
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Granted: —
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Expires: 2005-10-02
Abstract
Abstract A method for mechanically working cobalt-containing metals is carried out in the presence of a specific alkanol amine capable of reducing both the release of cobalt and the corrosion of iron. The alkanol amine compound contains one or more hydrophobic groups, such as alkyl groups or higher alkylene oxy groups. Also described is a concentrate which contains alkanol amine compounds and which is suitable, after dilution with water, for use in said mechanical working.
Inventors
- 👤 Rolf Sköld
- 👤 Iréne Johansson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 11:26
CPC Classifications
C; C10; C10M; C10M173/00; C10M173/02; C10M129/00; C10M129/02; C10M129/26; C10M129/28; C10M129/38; C10M129/40; C10M133/00; C10M133/02; C10M133/04; C10M133/06; C10M133/08; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/141; C23F11/142; C10M2201/00; C10M2201/087; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/022; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/123; C10M2207/125; C10M2207/126; C10M2207/129; C10M2207/22; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/105; C10M2209/107; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2219/00; C10M2219/04; C10M2219/044; C10N; C10N2040/00; C10N2040/20; C10N2040/22; C10N2050/00; C10N2050/01; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
210 words
A method for mechanically working cobalt-containing metals in the presence of an aqueous alkaline metal working liquid capable of reducing the release of cobalt, characterised in that the metal working liquid contains, as release and corrosion inhibiting agent, an alkanol amine having the formula wherein A is an alkylene oxy group derived from an alkylene oxide having 2-4 carbon atoms, R 1 is an alkyl group having 1-5 carbon atoms, or the group (A)n,-H, n 1 is an integer from 1 to 6, the number of groups derived from ethylene oxide in relation to the total number of groups derived from alkylene oxide being . at most 1:2 and at the lowest 1:15, or wherein R 2 is a hydrocarbon group having 6-18 carbon atoms, A is an alkylene oxide group derived from an alkylene oxide having 2-4 carbon atoms, and n 2 is an integer from 1 to 5, or wherein R 3 and R 4 represent hydrocarbon groups having 1-6 carbon atoms or, together with the nitrogen atom, form a six-membered ring which, in addition to carbon, may also contain an oxygen atom, A represents an alkylene oxy group derived from an alkylene oxide having 2-4 carbon atoms, and n 3 is an integer from 1 to 10.
Claim 2
Independent Claim
210 words
A method for mechanically working cobalt-containing metals in the presence of an aqueous alkaline metal working liquid capable of reducing the release of cobalt, characterised in that the metal working liquid contains, as release and corrosion inhibiting agent, an alkanol amine having the formula wherein A is an alkylene oxy group derived from an alkylene oxide having 2-4 carbon atoms, R 1 is an alkyl group having 1-5 carbon atoms, or the group (A)n,-H, n 1 is an integer from 1 to 6, the number of groups derived from ethylene oxide in relation to the total number of groups derived from alkylene oxide being . at most 1:2 and at the lowest 1:15, or wherein R 2 is a hydrocarbon group having 6-18 carbon atoms, A is an alkylene oxide group derived from an alkylene oxide having 2-4 carbon atoms, and n 2 is an integer from 1 to 5, or wherein R 3 and R 4 represent hydrocarbon groups having 1-6 carbon atoms or, together with the nitrogen atom, form a six-membered ring which, in addition to carbon, may also contain an oxygen atom, A represents an alkylene oxy group derived from an alkylene oxide having 2-4 carbon atoms, and n 3 is an integer from 1 to 10.
Claim 3
Dependent Claim
98 words
A method as claimed in claim 1, characterised in that the compounds of formula I show a ratio of the number of groups derived from ethylene oxide to the total number of groups derived from alkylene oxide of from 1:3 to 1:10, that the compounds of formula II contain both ethylene oxy and higher alkylene oxy groups, and that, in the compounds of formula III, R 3 and R 4 are alkyl groups having a total sum of from 5 to 10 carbon atoms or a six-membered ring, and n 3 is an integer from 2 to 8.
Claim 4
Dependent Claim
39 words
A method as claimed in claim 1 or 2, characterised in that the amount of alkanol amine in the metal working liquid is from 0.01 to 15%, preferably from 0.2 to 3% of the weight of the cooling lubricant.
Claim 5
Independent Claim
51 words
A method as claimed in any one of claims 1-3, characterised in that the metal working liquid also contains a supplementary corrosion inhibiting agent, such as an organic carboxylic acid having less than 10 carbon atoms, in an amount of from 0 to 10, preferably from 0.1 to 2% by weight.
Claim 6
Independent Claim
59 words
A method as claimed in any one of claims 1-4, characterised in that the metal working liquid contains a lubricant, such as a monocarboxylic acid having more than 10 carbon atoms, or a nonionic alkylene oxide adduct having a molecular weight of more than 400, in an amount of up to 10, preferably from 0.05 to 2% by weight.
Claim 7
Dependent Claim
29 words
A concentrate suitable, after dilution with water, for use in the mechanical working of cast iron, as claimed in claims 1-5, characterised in that it contains the following components
References Cited (Backward Citations)
US4315889A
Cited
EP0068061A1
Cited
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