EXTRACTION OF ORGANIC COMPOUNDS FROM WASTE OF GLYCEROL PURIFICATION

• Main Author: Hizbiyati, Andini
• Format: Theses
• Language: Indonesia
• Subjects: Teknik kimia
• Online Access: https://digilib.itb.ac.id/gdl/view/59625
• Institution: Institut Teknologi Bandung

Crude glycerol is a glycerol that has a low purity and also byproducts in the biodiesel industry and oleochemical industry. The purification process to obtain glycerol with high purity will produce glycerine pitch. Glycerine pitch is categorized as toxic and hazardous material. Until now glycerine pitch has not been utilized properly and glycerine pitch producing industries must spend higher costs to process it, which is US $400/ton. Glycerine pitch has a different content and form depends on previous process. Glycerine pitch produced through the transesterification stage contains 0- 30% glycerol, 2% water, 40-60% ash and 40-60% organic matter non glycerol (MONG). High composition of organic and inorganic compounds in glycerine becomes one of the considerations in determining alternative ways that can be done to reduce waste treatment costs. Extraction process is one of alternative way to utilize organic compounds that still valuable in glycerine pitch. The extraction process in this study is carried out to find out the effect of solvent type in the extraction process that can highly separate organic and inorganic compounds in glycerine pitch. The types of solvents used in this study are polar solvents in the form of ethanol, acetone and IPA. The results in this research show that the best solvent in the extraction process is the IPA. Using IPA as a solvent is able to highly separate organic and inorganic compounds compared to ethanol and acetone. The highly separation process is indicated by the results of high consentration of organic compounds in extract solutions. In extraction process using IPA, consentration of organic compounds in the extract solution reached 99.48% in the WLH sample and 98.15% in the WLF sample and were the highest concentration when compared to other solvents. IPA was also able to produce an organic compound yield of 93.18% in the WLH sample and 68.15% in the WLF sample and was the highest result. With these results, the IPA solution is chosen as the best solvent in the glycerine pitch extraction process. This research also determined the effect of differences ratio of samples to solvent volumes in the extraction process. The best ratio in the glycerine pitch sample extraction process is determined by high concentration of organic compounds and also the highest yield. The types of ratio variations used are 1:3, 1:5, and 1:10. The best ratio that produce the highest yield of organic compounds was 1:10. This rasio is able to produce an organic compound yield of 93.18% in the WLH sample and 71.65% in the WLF sample. The concentration of organic compounds produced in the extraction process using a ratio of 1: 10 is the highest level when compared to other ratios, which is 98.37% in WLH samples and 97.77% in WLF samples. Glycerine pitches from various olechemical industries have different textures from liquid to very dense samples. The best solvent type and ratio are used for the extraction process and use the same process conditions that are stirring at a speed of 200 rpm for 3 hours at room temperature. But in this extraction process shows that glycerine pitch samples with a denser texture are not able to dissolve well at room temperature, so the addition of the process temperature to remain at 50°C is needed to be able to dissolve glycerine pitch samples better.