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Oil filters containing strong base and methods of their use

a strong base and oil filter technology, applied in the direction of filtration separation, lubricant mounting/connection, separation process, etc., can solve the problems of increased oil consumption and engine wear, rapid increase in viscosity, and engine deposits

Inactive Publication Date: 2012-07-12
LUTEK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The invention is about filter elements that can sequester combustion acid in oil filters. These filter elements contain strong base particles that are held in a matrix of mechanically-interlocking fibers. The strong base particles are unattached to the fibers and are physically bound within the matrix. There is no latex chemically binding the strong base particles to the matrix. The strong base particles constitute at least 30% by weight of the filter element. The invention also includes methods for preparing these filter elements and reducing oxidation of oil by sequestering acids. The strong base flocs used in the invention have an average cross-section distance of greater than 10 microns and retain at least 40% of their intrinsic surface area as measured by a mercury intrusion porosimetry."

Problems solved by technology

In the absence of this acid neutralization, the engine corrodes, the lubricant gels, the viscosity rapidly increases, and engine deposits form.
These actions result in increased oil consumption and engine wear.
At the loadings needed to effectively neutralize combustion acids in internal combustion engine lubricants, ashless detergents are less cost effective than ash-containing detergents.
Additionally, U.S. Pat. No. 7,250,126 B2 discloses acid-neutralizing filter media for a liquid filter in a liquid filtration system and further discloses that strong base particle diameters of greater than 10 microns are known to cause increased engine wear in engine lubrication systems.
However, these disclosures have not led to commercialization of an oil filter containing a strong base.
Strong base migration from the filter to the lubricant remains an issue.
Once formed, these organic acids are not usually neutralized by dispersants or detergents and increased levels of these acids lead to even higher rates of their generation.

Method used

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  • Oil filters containing strong base and methods of their use
  • Oil filters containing strong base and methods of their use
  • Oil filters containing strong base and methods of their use

Examples

Experimental program
Comparison scheme
Effect test

example 1

Preparation of Filter Media Using a Formette Dynamique Automated Dynamic Handsheet Former

Retention Aid Preparation

[0186]All Retention Aid (RA) materials listed in Tables 1 and 2 were prepared by making 1% by weight solutions in water. To do so, three grams of RA were added to 297 grams of tap water followed by vigorous shaking to ensure the emulsions were properly inverted and / or the solutions were uniformly dispersed. The solutions were aged for a minimum of 30 minutes.

Cellulose Pulp Preparation

[0187]The cellulose fibers were dispersed with minimal refining in a Valley Beater to a concentration of 1.5% by weight using high freeness bleached southern softwood Kraft pulp.

Synthetic Polymer Preparation

[0188]The fibrillated or glass fibers were added in the amounts specified in Table 1 to two liters of tap water and stirred in a blender (The Herman Manufacturing Company, Lancaster Ohio) and dispersed for two minutes. Polyethylene fiber and 500 milliliters of tap water were then added an...

example 2

Procedure for Preparation of Filter Media Used in Engine Testing

[0191]The following procedure was followed to make a sheet measuring about 30×30 cm: Magnesium oxide (Martin Marietta Mag Chem 50), was added to deionized water to form an approximately 0.5% by weight slurry. The slurry was dispersed using a propeller-type laboratory stirrer at low speed. To this mixture, a high molecular weight flocculent such as those described in Table 3 was added at a concentration of about 0.1% by weight of flocculent to magnesium oxide. The magnesium oxide coalesced upon addition of the flocculent. Separately, a slurry containing about 0.3 weight % of cellulose fiber (soft or hard wood pulp) in deionized water was dispersed in a Waring type commercial blender for 40 seconds. A quantity of binder fiber such as polyethylene UL 410 (available from Minifibers, Inc., Johnson City, Tenn.) sufficient to bring the slurry to about 0.31 weight % was added to the slurry and dispersed for an additional 40 sec...

example 3

Procedure for Flocculation of MgO on Filter Media

[0193]Using filtered tap water, 0.5 weight percent solutions / dispersions of the flocculant products shown in Table 5 were prepared. All the solutions were allowed at least 30 minutes for the reverse emulsions to invert properly and shaken vigorously to ensure uniform dispersion. Five grams of Magchem 50 (Martin Marietta) was then weighed out and diluted to 200 grams using filtered tap water. The slurry was then stirred to achieve uniform dispersion.

[0194]To this slurry, the amount of 0.5 weight percent flocculant shown in Table 5 was added by weighing it into the container. If multiple components were used, the order of addition is shown in the table. For the microparticle retention aid system, the cationic polyacrylamide was added first, then the slurry was sheared using a Waring-type laboratory propeller blender for 1 minute. The solution of colloidal silica was added followed by the micro-polymer. The flocced solution was then filt...

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Abstract

Novel filter elements for sequestering acids from oil or fuel, the strong base flocs that comprise the filter elements, and methods of their preparation and use are disclosed. The filter elements comprise a mechanically linked interlocking fiber matrix interspersed with strong base particle flocs wherein the strong base particles constitute at least 30% by weight of the filter element. Certain filter elements may be useful for sequestering acids or neutralized acids in certain oils or fuels, for example, the acids originating in the combustion and lubrication system of an internal combustion engine or those contained in oils in an oil circulation system. Other filter elements may be useful for reducing oxidation of an oil.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application is a Continuation of U.S. patent application Ser. No. 12 / 264,792 filed Nov. 4, 2008, which claims benefit to U.S. Provisional Application No. 61 / 025,639 filed Feb. 1, 2008.FIELD OF THE INVENTION[0002]The present invention relates to filter elements useful for sequestering combustion acids in solid base-containing oil filters, where the filter elements include strong base flocs, and methods of their preparation and their use.BACKGROUND OF THE INVENTION[0003]Optimal functioning of an internal combustion engine (e.g., a diesel engine) requires that combustion acids, e.g. carboxylic, nitric, nitrous, sulfuric and sulfurous acid, with or without alkyl groups, be neutralized where or near where they first contact the lubricant, i.e., near the piston. In the absence of this acid neutralization, the engine corrodes, the lubricant gels, the viscosity rapidly increases, and engine deposits form. These actions result in increased oil...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F01M11/03B01D15/04B01D39/00B01D24/02
CPCY10T428/2982B01D2239/0407B01D37/03C10M2201/062C10N2210/01C07C7/144B01D37/025C10M175/0091C10N2210/02C10M175/0016F01M9/02B01D39/1623C10N2010/02C10N2010/04
Inventor LOCKLEDGE, SCOTT P.BROWNAWELL, DARRELL W.
Owner LUTEK