Unlock instant, AI-driven research and patent intelligence for your innovation.

Composition with improved cleanliness for lubrication of steam and gas turbine systems

a technology of steam turbines and lubricants, which is applied in the direction of lubricant compositions, liquid carbonaceous fuels, additives, etc., can solve the problems of sludge accumulation, tighter clearance, and extended drain intervals, and achieve the effect of preventing sludge accumulation and sludge accumulation

Inactive Publication Date: 2015-10-01
THE LUBRIZOL CORP
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0021]The invention further provides a lubricating oil composition that is capable of preventing filter plugging deposits and sludge.

Problems solved by technology

Turbine design is moving to systems that provide more power from smaller equipment, leading to tighter clearances, extended drain intervals, and so more stress and harsher conditions on both the equipment and the lubricant used in its operation.
These new base oils are much less polar than Group I oils, and additive formulations that worked well in Group I base oils often fail to provide the desired performance when used in Group II and Group III oils.
While this does provide improved oxidative stability for the base oil itself, they also end up having poorer solvency compared to Group I oils.
In addition, many power generation turbines in today's market are peaking units, meaning they only operate at times of peak demand.
In addition to oxidation and the by-products it produces, static discharge, micro-dieseling, incompatibility, and contamination are also root causes of varnish.
This added complication further increases the need for Group II and Group III based fluids that provide reliable performance in these high cost systems that cannot afford unplanned downtime and equipment damage caused by spent lubricant.
Formulating a fluid with the required amount of oxidative stability and resistance to formation of deposits is a challenge.
Fluids that emulsify are not widely accepted in the marketplace.
The formulation of lubricating compositions for steam and gas turbine systems has been complicated by the growing use of API Group II and Group III base oils which has led to increasing varnish formation in some power generating turbines.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Composition with improved cleanliness for lubrication of steam and gas turbine systems
  • Composition with improved cleanliness for lubrication of steam and gas turbine systems
  • Composition with improved cleanliness for lubrication of steam and gas turbine systems

Examples

Experimental program
Comparison scheme
Effect test

specific embodiment

[0111]The invention will be further illustrated by the following examples, which set forth particularly advantageous embodiments. While the examples are provided to illustrate the invention, they are not intended to limit it.

example set 1

[0114]A set of examples is prepared where the formulations contain a polyetheramine dispersant. The tables below summarize these formulations, including the comparative formulations described above. Except for the differences noted in the tables and their footnotes, the formulations of the listed examples are substantially equivalent. The values in the tables are pbw.

TABLE 1-1Details of Comparative Examples and Examples 1-A to 1-ECompCompCompExExExExExComponentEx 11Ex 22Ex 331-A41-B51-C61-D71-E8Base OilGrp IIIGrp IIIGrp IIIGrp IIIGrp IIIGrp IIGrp IIGrp IIIAlkylated0.3750.5100.7750.3750.3750.3750.3750.775DiphenylamineSubst Mono-0.090.090.090.090.090.090.090.09SulfidePolyetheramine0.00.00.00.10.50.50.50.5DispersantBorated0.00.00.00.00.00.00.00.0SuccinimideNon-Borated0.00.00.00.00.00.00.00.0SuccinimideMannich0.00.00.00.00.00.00.00.0Dispersant1Comparative Example 1 also contains a polyether demulsifier, an antiwear agent, an antifoam, and metal deactivator in conventional amounts, refer...

example set 2

[0120]A set of examples is prepared where the formulations contain a borated succinimide dispersant. The tables below summarize these formulations, including the comparative formulations described above. Except for the differences noted in the tables and their footnotes, the formulations of the listed examples are substantially equivalent. The values in the tables are pbw.

TABLE 2-1Details of Comparative Examples and Examples 2-A to 2-ECompCompCompExExExExExComponentEx 11Ex 22Ex 332-A42-B52-C62-D72-E8Base OilGrp IIIGrp IIIGrp IIIGrp IIIGrp IIIGrp IIIGrp IIIGrp IIIAlkylated0.3750.5100.7750.3750.3750.3750.3750.375DiphenylamineSubst Mono-0.090.090.090.090.090.090.090.09SulfidePolyetheramine0.00.00.00.00.00.00.00.0DispersantBorated0.00.00.00.10.50.10.10.1SuccinimideNon-Borated0.00.00.00.00.00.00.00.0SuccinimideMannich0.00.00.00.00.00.00.00.0Dispersant1See details for Comparative Example 1 above.2See details for Comparative Example 2 above.3See details for Comparative Example 3 above.4Exa...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
viscosity indexaaaaaaaaaa
decomposition pointaaaaaaaaaa
temperaturesaaaaaaaaaa
Login to View More

Abstract

The present invention relates to the use of an additive composition that contains the combination of two specific types of antioxidants with one or more of four specific types of dispersants in a Group II and / or Group III base oil-containing lubricating composition. The lubricating composition of the present invention provides improved cleanliness in steam and gas turbine systems. The invention further relates to the process to make the novel additive composition and its use in industrial fluids.

Description

FIELD OF THE INVENTION[0001]The present invention relates to the use of an additive composition that contains the combination of two specific types of antioxidants with one or more of four specific types of dispersants in a Group II and / or Group III base oil-containing lubricating composition. The lubricating composition of the present invention provides improved cleanliness in steam and gas turbine systems. The invention further relates to the process to make the novel additive composition and its use in industrial fluids.BACKGROUND OF THE INVENTION[0002]Varnish is a well known and recognized problem in the lubricant industry and in the area of power generation and gas-turbine applications is becoming of greater and greater concern. Turbine design is moving to systems that provide more power from smaller equipment, leading to tighter clearances, extended drain intervals, and so more stress and harsher conditions on both the equipment and the lubricant used in its operation. The bes...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(United States)
IPC IPC(8): C10M141/08
CPCC10M141/08C10M169/04C10M169/044C10M2217/043C10M2217/04C10M2215/28C10M2215/223C10M2215/042C10M2215/064C10M2215/02C10M2209/084C10M2207/281C10M2209/103C10M2223/043C10M2219/106C10M2219/082C10M2219/084C10M2219/044C10M2207/125C10M2203/1025C10N2030/04C10N2030/08C10N2040/12C10N2040/135C10N2020/02C10N2060/14C10M133/44
Inventor BUTKE, BETSY J.BARBER, ALLAN R.
Owner THE LUBRIZOL CORP