Eco-friendly Synthesis of Some New Benzylidene-iminothiazolyl-pyrazol-3-ol Derivatives via One-Pot Multicomponent Reaction and Evaluation of Antioxidant Activities

In present work, one-pot multicomponent reaction (MCR) route for the synthesis of benzylideneiminothiazolyl- pyrazol-3-ol derivatives (5a-p) by reacting ethyl cyanoacetate (1), substituted benzaldehyde (2a-c), thiosemicarbazide (3) and substituted phenacyl bromide (4a-g). This reaction proceeds by using bleaching earth clay (BEC) (pH 12.5) in PEG-400 as a green reaction media. All the synthesized compounds were characterized by IR, 1H NMR, 13C NMR and mass spectral data. The pharmacological investigation of the synthesized compounds suggest that most of them showed good antioxidant activity.

Synthesis of 14-Substituted-14H-Dibenzo[a,j]Xanthene Derivatives in Presence of Effective Synergetic Catalytic System Bleaching Earth Clay and PEG-600

The synthesis of 14-aryl 14H-dibenzo[a,j]xanthenes is achieved by a simple condensation reaction between β-naphthol with aryl or alkyl aldehydes in an effective synergetic catalytic system created by combining basic bleaching earth clay and PEG-600. The advantages of the present method include catalyst recyclability, superior product yield, a shorter reaction time and the avoidance of hazardous reagents. Synthesized xanthene derivatives were also screened for their antibacterial activity against Staphylococcus aureus (MTCC 96) and Pseudomonas aeruginosa (Wild).

Karakteristik Marshall Campuran Aspal AC-WC Menggunakan filler Spent Bleaching Earth Sebagai Pengganti Abu Batu

Indonesia’s road crackdown commonly USES a flexible crackdown that a main ingredient on asphalt. One of the tools used in subthanizing aggregates with spent bleaching earth (SBE) replacing the filler SBE into teh mix of asphalt is predicted to enhance resiliencs SBE isa solid waste produced by the plants’s biofuel refinery, which included the exictence of B2 on this study aims to find out how much marshall’s characteristics affect the AC-WC asphalt replace the filler with SBE on at the first stage of testing got an optimum asphalt level next filler replacement will be done with SBE as big 0%, 25%, 50%, 75%, 100% and the result met the spesifications at SBE level 25%, with this research this waste of B2 could be used replace the filler in variations 25%

The Opportunity of Spent Bleaching Earth (Bentonite) and Silica Solubilizing Bacteria as Silica Source for Induction of Secondary Metabolites Production in Plants

Background: CPO refining which produces solid waste namely spent bleaching earth (SBE) in large quantities can pollute the environment. SBE from bentonite ores contains large amounts of silica, so it can be an alternative source of silica minerals. Silica plays an important role in increasing plant resistance and bioactive plant compound products. Methods: The application of Si in plants can increase secondary metabolites such as phenolic and anti-fungal compounds in response to disease pathogens. However, the low solubility of silica makes silica not sufficiently available for plants. Using microorganisms as silica solubilizing bacteria helps increasing solubility of silica in the soil. Bacteria dissolve silica by removing organic acids and producing indole acetic acid (AAI), which stimulates root hairs. Results: This review presents the results of a study on the utilization of silica-rich SBE waste as a source of available silica for plants with solubilizing method using bacteria to increase plant growth and resistance, as well as increase plant secondary metabolite compounds. Conclusions: The application of silica solubilizing bacteria has been known to play an important role in providing silica for plants, through enzymatic mechanisms, namely the production of organic acids and extracellular polysaccharides.

UTILIZATION SPENT BLEACHING EARTH AS A FILLER OF MATERIAL CONSTRUCTION

Spent bleaching earth (SBE) is a waste from cooking oil industry. It is categorized as one of the hazardous and toxic materials, because oil residues in it. Generally, SBE is overcome by landfill and it’s sometimes become problems. Basically SBE contains SiO2 and the size of the grain is very fine, almost the same as the fine aggregate of sand used for making brick. In this study, the making of brick used SBE with several variations (2.75% - 27.52%) of the total raw materials used. Brick making methods are based on SNI 03-0348-1989 for raw material ratio, SNI 03-0348-1989 for molding and presshing, SNI 03-6825-2002 for drying and curing. The brick quality was determined based on fineness modulus parameters, dry weight, brick absorption to water and compressive strength. Brick contain SBE 2.75% was produced with molding size of 15cm x 30cm x 9cm, it has an average dry weight of 7.80 kg, compressive strength of 8.95 MPa and absorbing power of 1.26%.

PENGENDALIAN PERSEDIAAN BAHAN BAKU MINYAK SAWIT DENGAN MENGGUNAKAN METODE CONTINUOUS (Q) DAN PERIODIC (P) REVIEW DI PT. XYZ

PT. Wilmar Nabati Indonesia,Tbk merupakan perusahaan industri agribisnis yang bergerak dalam bidang jasa pengolahan minyak mentah dengan kegiatan utamanya memproduksi minyak sawit. Berdasarkan sumber dari perusahaan, kerap mengalami kendala dalam pengendalian persediaan bahan baku minyak sawit, khususnya pada Bleaching Earth dan Phosphoric Acid yang disebabkan oleh kurangnya antisipasi dalam perencanaan dan pemenuhan jumlah permintaan konsumen yang berfluktuasi (probalistik) dan jangka waktu pemesanan yang tidak tetap karena adanya penyesuaian dari permintaan konsumen yang belum terencana dengan baik sehingga sering mengalami kekurangan persediaan yang menyebabkan permintaan konsumen tidak terpenuhi serta kelebihan kapasitas persediaan di berbagai gudang penyimpanan. Tujuan dari penelitian yang dilakukan adalah untuk menentukan pengendalian persediaan bahan baku minyak sawit untuk meminimasi total biaya persediaan di perusahaan. Metode yang digunakan adalah metode Continuous (Q) dan Periodic (P) Review. Hasil perhitungan didapatkan total biaya persediaan minimum adalah dengan metode Continuous Review (Q) Lost Sales sebesar Rp .740.144.076 dengan metode perusahaan sebesar Rp. 764.998.500 sehingga penghematan biaya sebesar Rp. 24.854.424 dengan presentase penghematan biaya sebesar 4%. Jumlah pemesanan Bleaching Earth per pesan bulan April 2021-Maret 2020 sebesar 68 kg dan Phosphoric Acid per pesan bulan April 2021-Maret 2022 sebesar 36 ton dengan total biaya persediaan sebesar Rp. 790.430.247,-.