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Cylinder lubricating oil composition for crosshead diesel engine equipped with scrubber

Inactive Publication Date: 2017-11-09
JXTG NIPPON OIL & ENERGY CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a cylinder oil for a crosshead diesel engine equipped with a scrubber which reduces or prevents the generation of scums (cloudy substances) from hydrocarbon-based substances, soots, and moisture in the scrubber. This results in purification of gases emitted from the cylinder in the scrubber. The patent also provides a method for lubricating a cylinder of a crosshead diesel engine equipped with a scrubber which achieves the same technical effect.

Problems solved by technology

The latter option is more focused on because low-sulfur fuels are expensive.
However, exhaust gases from diesel engines include hydrocarbon-based substances such as unburnt fuel and lubricant mist.
If these hydrocarbon-substances and water are emulsified, the soot component in the exhaust gases are wrapped inside the emulsion to form scums, and the scums accumulate at the upper portion of the absorption liquid, as a result, the separation becomes difficult.

Method used

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  • Cylinder lubricating oil composition for crosshead diesel engine equipped with scrubber
  • Cylinder lubricating oil composition for crosshead diesel engine equipped with scrubber
  • Cylinder lubricating oil composition for crosshead diesel engine equipped with scrubber

Examples

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examples

[0138]Hereinafter, the present invention will be explained further in detail based on Examples and Comparative Examples. However, the present invention is not limited to these Examples.

examples 1 to 11

, Comparative Examples 1 to 7

[0139]Regarding the first embodiment of the lubricating oil composition, lubricating oil compositions of compounding formulations shown in Tables 1 and 2 were prepared and a high-speed emulsification test was carried out thereon. The results are shown in Tables 1 and 2. In Tables 1 and 2, the amounts of the base oils are the contents on the basis of the total amount of the base oils, and the amounts of additives are the contents on the basis of the total amount of the composition.

[0140](Commercially Available Cylinder Oil)

[0141]A commercially available cylinder oil containing: mineral base oil in an amount of 81 mass %; a Ca phenate detergent of the above formula (1) wherein R1 is a C12 alkyl or alkenyl group; a carbonic Ca sulfonate detergent (C20, C22 and C24 hydrocarbon groups are bonded to an aromatic six-membered ring); a polybutenyl succinimide of the above formula (4) wherein R4 is a polybutenyl group; alkyldiphenylamine (carbon numbers of the alk...

examples 12 to 26

, Comparative Examples 8 to 13

[0150]Regarding the second embodiment of the lubricating oil composition of the present invention, lubricating oil compositions of the compounding formulations shown in Tables 3 to 5 were prepared, and a high-speed emulsification test was carried out in the same way as above. The results are shown in Tales 3 to 5. In Tables 3 to 5, the amounts of the base oils are the contents on the basis of the total amount of the base oils, and the amounts of additives are the contents on the basis of the total amount of the composition.

[0151](Base Oil)

Base oil 1: solvent refining base oil, 500 N, kinematic viscosity at 100° C. 10.8 mm2 / s, content of saturated component 62 mass %

Base oil 2: solvent refining base oil, Bright Stock, kinematic viscosity at 100° C. 31.8 mm2 / s, content of saturated component 46 mass %

[0152](Component (A1))

(A1)-1: a Ca phenate of the above formula (1) wherein A is a sulfide group, x=1 to 2, and m=1 to 2, base number 250 mgKOH / g, Ca content...

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PUM

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Abstract

A cylinder lubricating oil composition for a crosshead diesel engine equipped with a scrubber, including: a base oil; and (A) a metallic detergent, wherein the composition has a base number of 15 to 125 mgKOH / g, and a kinematic viscosity at 100° C. of 10 to 30 mm2 / s; and the composition satisfies the requirement (i) or (ii): (i) the composition includes: (B) 0.02 to 5.0 mass % of a demulsifier; (ii) the composition includes, as the component (A), (A1) a Ca phenate detergent; and (A2) a metallic detergent other than Ca phenate; the composition optionally includes (C-1′) 0.015 mass % or less in terms of nitrogen of a succinimide dispersant or a borated derivative thereof; and the Ph value of the formula (1) is 20×10−3 or less:Ph value=CCa×2 / (rM×40.08)  (1)wherein CCa represents calcium content (mass %) derived from the component (A1), and rM represents a metal ratio of the component (A1).

Description

TECHNICAL FIELD[0001]The present invention relates to a cylinder lubricating oil composition for a crosshead diesel engine equipped with a scrubber, and specifically relates to a cylinder lubricating oil composition suitable for use in a crosshead diesel engine equipped with a scrubber.BACKGROUND[0002]Crosshead diesel engines are used a lot for main engines of large ships. Thus, it can be said that large part of the effect of ship operations on the environment is from emission matter of crosshead diesel engines.[0003]Interests in environmental problems have been increased, and attentions are also given to nitrogen oxides (NOx) and sulfur oxides (SOx) contained in exhaust gases emitted from ships to the air. Regarding NOx regulations, International Maritime Organization (IMO) decided to put Tier III into effect in Emission Control Area from 2016. Regarding SOx regulations, discussed is to reduce the sulfur components in fuels used in General Sea Area into no more than 0.5%, from 2020...

Claims

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Application Information

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IPC IPC(8): C10M101/02C10M169/04
CPCC10M101/02C10M169/042C10M2215/245C10M2207/024C10N2240/103C10M169/047C10M169/048C10M2207/028C10M2209/103C10M2203/1006C10M2207/262C10M2207/281C10M2207/289C10M2209/104C10M2209/105C10M2215/28C10M2219/046C10M2219/089C10N2030/041C10N2030/02C10N2030/24C10N2030/52C10N2040/252C10N2020/04C10M2209/108C10N2010/04C10N2060/14C10M133/16C10M145/24C10M159/22C10M163/00C10M171/02C10N2040/253
Inventor TAKESHIMA, SHIGEKI
Owner JXTG NIPPON OIL & ENERGY CORPORATION
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