Process for Preparation of Low Molecular Weight Molybdenum Succinimide Complexes

a technology of molybdenum succinimide and complex, which is applied in the field of process for preparing low molecular weight molybdenum succinimide complexes, can solve the problems of corrosion problems, slow loss of friction ability, and sulfur content, and achieve the effects of improving total basic nitrogen (tbn), improving wear performance, and increasing molybdenum

Inactive Publication Date: 2013-10-03
CHEVRON ORONITE CO LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The process results in a molybdated succinimide complex that is a liquid at room temperature, with improved molybdenum content, Total Basic Nitrogen (TBN), and wear performance, while preventing particulate formation, thus providing enhanced lubrication properties for internal combustion engines.

Problems solved by technology

The molybdenum dithiocarbamates, however, contain sulfur and slowly lose the ability to reduce friction unless an alternate sulfur source is present in the lubricating oil.
Problems associated with the use of sulfur in lubricating oils are that sulfur can be incompatible with emission control devices and can result in corrosion problems.

Method used

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  • Process for Preparation of Low Molecular Weight Molybdenum Succinimide Complexes
  • Process for Preparation of Low Molecular Weight Molybdenum Succinimide Complexes
  • Process for Preparation of Low Molecular Weight Molybdenum Succinimide Complexes

Examples

Experimental program
Comparison scheme
Effect test

example 1

Molybdenum Post-Treated Low Molecular Weight Succinimide Complex Made from Acrylic Acid

[0092]Into a round bottom flask equipped with an overhead mechanical stirrer, water condenser with nitrogen line and Dean-Stark trap, addition funnel, temperature controller, heating mantle, and thermocouple was added 70.00 g of octadecenyl succinic anhydride (ODSA) (available from Sigma Aldrich Corporation, St. Louis, Mo., U.S.A.) and 39.57 g of Chevron 100 neutral oil. The mixture was heated to 127° C. and 33.63 g of tetraethylenepentamine (TEPA; 0.9 mole equivalent to ODSA) was charged drop wise into the mixture via the addition funnel. Slight foaming occurred during the initial charge stage. After the TEPA was charged, the temperature was increased to 165° C. and then held at 165° C. until the reaction was complete as indicated by the IR spectrum.

[0093]The material was cooled to room temperature and 41.03 g was transferred to a round bottom flask. The flask was heated to 110° C. for acrylic ac...

example 2

Molybdenum Post-Treated Low Molecular Weight Succinimide Complex Made from Acrylic Acid

[0100]A molybdated succinimide complex was prepared using the same general procedure and components outlined in Example 1 except that the temperature for the acrylic acid treatment step was kept below 100° C. for the addition of acrylic acid and then a reaction temperature of 75° C. was maintained for 3 hours. The molybdated succinimide complex was a liquid at room temperature, did not contain visible particulate matter, and had the following properties:

Mo=9.342 wt. %

Total Base Number=123.4 mg KOH / g

example 3

Molybdenum Post-Treated Low Molecular Weight Bis-Succinimide Complex Made from Acrylic Acid

[0102]A molybdated succinimide complex was prepared using the same general procedure and components outlined in Example 1 except that 0.5 mole equivalent TEPA to ODSA was used. The molybdated succinimide complex was a liquid at room temperature, did not contain visible particulate matter, and had the following properties:

Mo=5.7 wt. %

Total Base Number=57.8 mg KOH / g

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Abstract

Disclosed is a product prepared by the process for preparing a molybdated succinimide complex, the process comprising:(a) reacting an alkyl or alkenyl succinimide of a polyamine of formula I or formula II or mixtures thereof:wherein R is an about C12 to C30 alkyl or alkenyl group, R′ is a straight or branched-chain alkylene group having 2 to 3 carbon atoms, x is 1 to 11, and y is 1 to 10, with an α,β-unsaturated mono-carboxylic acid or carboxylic acid ester, in a charge mole ratio of the α,β-unsaturated mono-carboxylic acid or carboxylic acid ester to the succinimide of formula I or formula II or mixtures thereof of about 0.1:1 to about 6:1, and wherein the reaction temperature is no greater than about 135° C.; and(b) reacting the succinimide product of step (a) with an acidic molybdenum compound to provide the molybdated succinimide complex, wherein the molybdated succinimide complex prepared is a liquid at room temperature.

Description

[0001]This is a Divisional patent application of U.S. patent application Ser. No. 13 / 011,495 which was filed on Jan. 21, 2011.FIELD OF THE INVENTION[0002]The present invention generally relates to a product prepared by an improved process for preparing low molecular weight molybdenum succinimide complexes.BACKGROUND OF THE INVENTION[0003]In general, organic molybdenum compounds are known to improve the lubricating properties of engine oils. For example, molybdenum dithiocarbamates are typically employed for the reduction of friction. The molybdenum dithiocarbamates, however, contain sulfur and slowly lose the ability to reduce friction unless an alternate sulfur source is present in the lubricating oil. Another example of organic molybdenum compounds are sulfurized molybdenum polyisobutenyl succinimide complexes which are used to mediate wear, reduce friction, and / or control oxidation. See, e.g., U.S. Pat. Nos. 4,259,194; 4,265,773; 4,283,295; 4,285,822; and 6,962,896 and U.S. Paten...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): C07F11/00
CPCC07F11/00C07D207/408
InventorNELSON, KENNETH DALEHARRISON, JAMES JOSEPHROGERS, PAULAHOSSEINI, MITRA
OwnerCHEVRON ORONITE CO LLC