Activated charcoal was prepared from Acrocomia aculeata (macaúba) endocarp by ZnCl₂ activation and then used for the adsorptive purification of pretreated crude glycerol (CG) containing pigments, such as β-carotene. The pretreatment of glycerol involved filtration of the K₃PO₄ formed by the addition of H₃PO₄ to the crude glycerol containing KOH. A mixture of 1.38:1 w/w of ZnCl₂:Acrocomia aculeata pulp was heated at 120 °C with stirring for 24 h. The mixture was activated by heating at 600 °C for 3 h. The activated charcoal was cooled to 25 °C, washed with a 1:1 mixture of methanol and water (100 mL) and heated at 150 °C for 2 h. The surface properties of the activated charcoal (surface area 627 m² g⁻¹, pore volume 0.39 m³ g⁻¹, Bronsted sites 118.23 μmol g⁻¹, and Lewis sites 104.86 μmol g⁻¹) and the adsorption capacity for impurities in H₃PO₄-pretreated crude glycerol were investigated. The activated charcoal exhibited the most suitable surface properties for the purification of pretreated crude glycerol, attaining a 95.99% glycerol concentration (by GC) using 10 g/L with gravity filtration through a column at room temperature over a 48-h period. The purified glycerol was characterized by GC/MS, ¹H- and ¹³C-NMR, and DSC and TG analyses. The activated charcoal was regenerated by washing with methanol and hexane and heating to 150 °C for 5 h. The activated charcoal could be re-used three times to remove all of the pigments before it was necessary to re-activate the charcoal by heating with ZnCl₂.

活性炭是通过ZnCl ₂活化从A形果（Acrocomia aculeata）内果皮中制备的，然后用于吸附纯化含颜料的预处理粗制甘油（CG），例如β-胡萝卜素。甘油的预处理包括过滤通过向含有KOH的粗甘油中添加H ₃ PO ₄而形成的K ₃ PO ₄。1.38：1 w / w ZnCl ₂：Acrocomia aculeata的混合物将纸浆在搅拌下于120℃加热24小时。通过在600℃下加热3小时来活化混合物。将活性炭冷却至25°C，用甲醇和水的1：1混合物（100 mL）洗涤，并在150°C加热2 h。活性炭的表面性质（表面积627 m ² g ^-1，孔体积0.39 m ³ g ^-1，布朗斯台德位点118.23μmolg ^-1，路易斯位点104.86μmolg ^-1）和对杂质的吸附能力高₃ PO ₄研究了预处理的粗甘油。活性炭表现出最适合纯化预处理粗甘油的表面性能，在室温下通过色谱柱在48小时内使用10 g / L重力过滤，可达到95.99％的甘油浓度（通过GC）（通过GC）。纯化的甘油通过GC / MS，¹ H-和¹³ C-NMR以及DSC和TG分析进行表征。通过用甲醇和己烷洗涤并加热到150°C 5 h来再生活性炭。在必须通过与ZnCl ₂加热来重新活化木炭之前，可以将活化的木炭重复使用3次以除去所有颜料。