Effect of Thickener’s Percentage on the Characteristic of the Biogrease formulated with Combined Thickeners: Calcium Oleate Complex and Overbased Calcium Sulfonate Overbased

EasyChair Preprint 15561

Abstract

This research studied on the manufacturing of overbased Calcium OleSulfo biogrease NLGI 2, using a combination of 2 types of thickeners, Calcium complex soap (superior in thermal stability) and overbased calcium sulfonate soap (superior in antiwear performance), at various compositions. The Calcium complex soap was resulted via saponification of Ca(OH)₂, epoxidized oleic acid, and acetic acid, while the Calcium sulfonate soap was resulted via saponification of Ca(OH)₂, LABSA (Linear Alkyl Benzene Sulfonic Acid) and CaCO₃. The base oil was epoxidized RBDPO. The process of saponification was conducted in a reactor (laboratory scale) under ambient pressure. The characterization of the products includes penetration (consistency) test, elongation test, dropping point test, and antiwear performance test. The results show that the effect of Overbased calcium sulfonate to increase the antiwear performance is proportional to the percentage, and it is always followed by decrease of the dropping point. At composition up to 50%, the Calcium OleSulfo biogrease would give NLGI 2 with dropping point 220°C. However, if the percentage is above 50%, it will cause significant decrease in the product’s consistency or in other words the grease will become too soft, (NLGI 1).

Key words: Antiwear, Calcium oleate complex grease, Consistency, Dropping point, NLGI 2, Overbased calcium sulfonate grease, 12-hydroxystearic acid, oleic acid.

Keyphrases: Calcium Oleic Complex, Calcium Sulfonate Overbased, Grease Combination

@booklet{EasyChair:15561,
  author    = {Sukirno Aditama and Puji Susilowati and Muhammad Luthfi},
  title     = {Effect of Thickener’s Percentage on the Characteristic of the Biogrease formulated with Combined Thickeners: Calcium Oleate Complex and Overbased Calcium Sulfonate Overbased},
  howpublished = {EasyChair Preprint 15561},
  year      = {EasyChair, 2024}}