LUBRICANT COMPOSITION USED FOR COMPRESSING AMMONIA REFRIGERANT AND METHOD FOR LUBRICATING COMPRESSOR FOR AMMONIA REFRIGERANT

Title:

LUBRICANT COMPOSITION USED FOR COMPRESSING AMMONIA REFRIGERANT AND METHOD FOR LUBRICATING COMPRESSOR FOR AMMONIA REFRIGERANT

Document Type and Number:

Japanese Patent JPH1036865

Kind Code:

A

Abstract:

To obtain a lubricant compsn. having a specified viscosity and an excellent compatibility with an ammonia refrigerant by using, as the base oil, a cyclic compd. represented by a specific formula having dioxolane or dioxane rings.

Sorbitol is reacted with a carbonyl compd. (e.g. methyl ethyl ketone) in the presence of an acid catalyst (e.g. p-toluenesulfonic acid) to give a cyclic compd. represented by the formula (wherein R11 to R16 are each 1-8C alkyl) having dioxolane or dioxane rings and a hydroxyl value of about 2mgKOH/g or lower. The cyclic compd. as the base oil is compound with about 0.1-1.0wt.% amine antioxidant (e.g. p,p'-dioctyldiphenylamine) to give a lubricant compsn. having a viscosity at 40°C of 8-220mm2/s. About 0.1-2wt.% this compsn. is dissolved in an ammonia refrigerant to be used desirably.

Inventors:

KAIMAI TAKASHI
TAKAHASHI HITOSHI
HAGIWARA TOSHIYA
KOBAYASHI YUICHIRO

Application Number:

JP19096996A

Publication Date:

February 10, 1998

Filing Date:

July 19, 1996

Export Citation:

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Assignee:

JAPAN ENERGY CORP
KAO CORP

International Classes:

C10M105/18; C10M133/12; C10N20/02; C10N30/10; C10N40/30; (IPC1-7): C10M105/18; C10M133/12

Attorney, Agent or Firm:

Hidetake Komatsu (2 outside)

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