#TITLE_ALTERNATIVE#

• Main Author: NUGRAHA (NIM 13002081) - RADITE AGUNG WAHYUDI (NIM 13002079), ALI
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/30099
• Institution: Institut Teknologi Bandung

Castor oil is vegetable oil containing about 90% risinoleat acid from total of its fatty acids. From risinoleat acid can be made lithium 12-hydroxystearat. It is a special additive to make grease since it is a very good thickener. The high melting point and its goodness resilience to water make additive such as lithium 12-hydroxystearat widely used as additive for grease. <br /> <br /> The aim of this research is to evaluate process production of grease through Hydrogenated Castor Oil (HCO) by Catalytic Transfer Hydrogenation (CTH) method, and for collecting the data and information for commercial production effort. The CTH method is choosen because of mild process production, safety consideration, and also more effective contact for liquid phase reaction. This research would been continued the previously research to obtain grease. This research will also compare grease obtained from HCO experiment with commercial grease product. <br /> <br /> This research is consist of three stages, namely hydrogenation of castor oil, saponification reacting acid with lithium, and producing grease where base oil and additive is mixed at certain composition. Note that grease are composed of base oil and lithium soap, weight by 64%-w and 36%-w, respectively. The temperature mixing are varied from 25 degrees C, 50 degrees C, and 100 degrees C. Grease product from this study is classified as NLGI grade 00 for mixing temperature 25 degrees C and NLGI grade 1 for mixing temperature 50 degrees C while Pertamina's grease have NLGI grade 2. Grease's dropping point be at temperature 80 degrees C for mixing temperature 25 degrees C and 95 degrees C for mixing temperature 50 degrees C. However, the mixing temperature 100oC will destabilize structure of base oil. Hence, grease from this research can only be used in low speed motor application