Lubricating composition containing a detergent

Patent metadata

Field	Value
Publication number	US-2016208189-A1
Application number	US-201414910934-A
Country	US
Kind code	A1
Filing date	Aug 11, 2014
Priority date	Aug 15, 2013
Publication date	Jul 21, 2016
Grant date	—

Abstract

The invention provides a process to prepare a detergent in the presence of a polyether compound. The invention further provides for a lubricating composition containing the detergent. The invention further relates to the use of the lubricating composition in a mechanical device such as an internal combustion engine.

First claim

1 - 32 . (canceled)

33 . A method of lubricating an internal combustion engine comprising supplying to the internal combustion engine a lubricating composition comprising an oil of lubricating viscosity and a product obtained by at least one of:
(a) A process for preparing a metal-containing detergent that has incorporated into it a polyether compound, the process comprising the steps of:
(i) Forming/providing a detergent substrate in the presence of a polyether compound; and
(ii) Neutralising the detergent substrate of step (i) with a metal-containing base to form a neutral metal-containing detergent soap,

or
(b) A process for preparing a metal-containing detergent that has incorporated into it a polyether compound, the process comprising the steps of:
(i) Forming/providing a detergent substrate;
(ii) Contacting the detergent substrate of step (i) with a polyether compound; thereafter neutralizing the detergent substrate with a metal-containing base to form a neutral metal-containing detergent soap,

or
(c) A process for preparing a metal-containing detergent that has incorporated into it a polyether compound, the process comprising the steps of:
(i) Forming/providing a detergent substrate; and
(ii) Neutralising the detergent substrate of step (i) with a metal-containing base in the presence of a polyether compound to form a neutral metal-containing detergent soap, with the proviso that at least 50 mol % of the polyether compound is added before 75% of neutralizing is complete.

34 . The method of claim 33 , wherein the processes a, b and c, further comprise the step of (iii) overbasing the neutral metal-containing detergent soap to form an overbased detergent.

35 . The method of claim 33 , wherein the detergent substrate is selected from the group consisting of a sulphonate, a sulphur-coupled phenate, a sulphur-free coupled phenol, a salicylate, and a carboxylate.

36 . The method claim 35 , wherein the detergent substrate is selected from a sulphonate, a sulphur-coupled phenate, or a sulphur-free coupled phenol.

37 . The method of claim 36 , wherein the detergent substrate comprises a hydrocarbyl-substituted phenol (typically an alkyl phenol), or a sulphur-bridged alkyl phenol, or a methylene coupled alkyl phenol forming a phenate detergent.

38 . The method of claim 33 , wherein the metal-containing base is a hydroxide or oxide of the metal.

39 . The method of claim 33 , wherein the metal of the metal-containing base is an alkali metal or alkaline earth metal.

40 . The method of claim 39 , wherein the metal is calcium or magnesium.

41 . The method of claim 40 , wherein the metal-containing base is calcium hydroxide, calcium oxide, or mixtures thereof.

42 . The method of claim 33 , wherein the polyether compound is a polyalkylene oxide or derivative thereof.

43 . The method of claim 33 , wherein the polyether compound is hydroxyl-terminated.

44 . The method of claim 33 , wherein the polyether compound is a C1-C8 monocapped polyalkylene oxide selected from the following compositions:
(i) 0 wt % to 40 wt % ethylene oxide (or ethylene glycol); and 60 wt % to 100 wt % propylene oxide (propylene glycol); (ii) 0 wt % to 20 wt % ethylene oxide (or ethylene glycol); and 80 wt % to 100 wt % propylene oxide (propylene glycol); (iii) 0 wt % to 10 wt % ethylene oxide (or ethylene glycol); and 90 wt % to 100 wt % propylene oxide (propylene glycol); (iv) 100 wt % propylene oxide (propylene glycol); and (v) a block A-B-A type copolymer comprising 25 wt % to 40 wt % propylene oxide (or propylene glycol); 20 wt % to 50 wt % ethylene oxide (or ethylene glycol); and 25 wt % to 40 wt % propylene oxide (or propylene glycol).

45 . The method of claim 42 , wherein polyether compound has a number average molecular weight of 1400 to 7000 Daltons.

46 . The method of claim 33 , wherein when the metal-containing detergent is a sulphonate, and the weight ratio of the polyether to detergent substrate varies from 1:50 to 5:2.

47 . The method of claim 33 , wherein when the metal-containing detergent is a phenate (including a sulphur-coupled phenate, or a sulphur-free coupled phenol), and the weight ratio of the detergent substrate to polyether varies from 1:32 to 3:4.

48 . The method of claim 33 , wherein the product is present in the range of 0.01 wt % to 8 wt % of the lubricating composition.

49 . A method of lubricating an internal combustion engine comprising supplying to the internal combustion engine a lubricating composition comprising an oil of lubricating viscosity and a metal-containing detergent that has incorporated into it a polyether compound, obtained by the process comprising the steps of:
(iii) Forming/providing a detergent substrate; (iv) Neutralizing the detergent substrate of step (i) with a metal-containing base to form a neutral metal-containing detergent soap; and (v) overbasing the neutral metal-containing detergent soap of step (ii) to form an overbased detergent, in the presence of a polyether compound, with the proviso that at least 50 mol % of the polyether compound is added before 75% of overbasing is complete.

50 . The method of claim 49 , wherein the detergent substrate is selected from the group consisting of a sulphonate, a sulphur-coupled phenate, a sulphur-free coupled phenol, a salicylate, and a carboxylate.

51 . The method of claim 49 , wherein the metal of the metal-containing base is an alkali metal or alkaline earth metal.

52 . The method of claim 51 , wherein the metal is calcium or magnesium.

53 . The method of claim 52 , wherein the metal-containing base is calcium hydroxide, calcium oxide, or mixtures thereof.

54 . The method of claim 49 , wherein the polyether compound is a polyalkylene oxide or derivative thereof.

55 . The method of claim 54 , wherein the polyether compound is hydroxyl-terminated.

56 . The method of claim 55 , wherein polyether compound has a number average molecular weight of 1400 to 7000 Daltons.

Assignees

• Lubrizol Corp

Inventors

• Walker Gary M
• Delbridge Ewan E
• Zhang Yanshi
• Sampler Edward P
• Cook Stephen J
• Friend Christopher L
• Fahmy Mohamed G

Classifications

• C10M2207/028

  Overbased salts thereof · CPC title

• C10N2030/04

  Detergent property or dispersant property · CPC title

• C10M2209/103

  Polyethers, i.e. containing di- or higher polyoxyalkylene groups · CPC title

• C10M2215/28

  Amides; Imides · CPC title

• C10M2205/022

  Ethene · CPC title