title: Production of biodiesel and lactic acid from rapeseed oil using sodium silicate as catalyst.
abstract: Biodiesel and lactic acid from rapeseed oil was produced using sodium silicate as catalyst. The transesterification in the presence of the catalyst proceeded with a maximum yield of 99.6% under optimized conditions [3% (w/w) sodium silicate, methanol/oil molar ratio 9/1, reaction time 60 min, reaction temperature 60°C, and stirring rate 250 rpm]. After six consecutive transesterification reactions, the catalyst was collected and used for catalysis of the conversion of glycerol to lactic acid. A maximum yield of 80.5% was achieved when the reaction was carried out at a temperature of 300°C for 90 min. Thus, sodium silicate is an effective catalyst for transesterification and lactic acid production from the biodiesel by-product, glycerol.
authors.affiliation: Biomass Group, Laboratory of Tropical Plant Resource Science, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, 88 Xuefu Road, Kunming, Yunnan Province 650223, China.
authors.forename: Yun-Duo
authors.initials: YD
authors.lastname: Long
authors.forename: Feng
authors.initials: F
authors.lastname: Guo
authors.forename: Zhen
authors.initials: Z
authors.lastname: Fang
authors.forename: Xiao-Fei
authors.initials: XF
authors.lastname: Tian
authors.forename: Li-Qun
authors.initials: LQ
authors.lastname: Jiang
authors.forename: Fan
authors.initials: F
authors.lastname: Zhang
mesh_terms: D056804:Biofuels / Q000032:analysis*; D001709:Biotechnology / Q000379:methods*; D002384:Catalysis; D005229:Fatty Acids, Monounsaturated; D005990:Glycerol / Q000737:chemistry; D019344:Lactic Acid / Q000138:chemical synthesis*; D010938:Plant Oils / Q000737:chemistry*; D000074262:Rapeseed Oil; D017640:Silicates / Q000737:chemistry*; D013696:Temperature; D013997:Time Factors; D014867:Water / Q000737:chemistry
chemical_list: D056804:Biofuels; D005229:Fatty Acids, Monounsaturated; D010938:Plant Oils; D000074262:Rapeseed Oil; D017640:Silicates; D014867:Water; D019344:Lactic Acid; C005691:sodium silicate; D005990:Glycerol