ABSTRACT Vinyl chloride is generally produced as a material for making polymers, especially polyvinyl chloride (PVC). The aim of establishing a vinyl chloride factory is to increase domestic production capacity and build Indonesia's ability to become an exporter. Vinyl chloride is produced through a direct chlorination process with the main raw materials being ethylene and chlorine. This proce…
ABSTRACT The surfactant industry in Indonesia is still very limited, even though its use is increasing. According to data from the Chemistry Center of the Indonesian Institute of Sciences (LIPI), Indonesia needs around 95 thousand tons of surfactants per year while domestic production capacity is only around 55 thousand tons per year so that as much as 44 thousand tons of surfactants are still…
ABSTRACT The preliminary design of a diisopropyl ether plant with a fixed bed reactor as the main equipment has a production capacity of 56,000 tons per year. The raw materials used in this plant design are acetone (C₃H₆O) and hydrogen (H₂). The production process of diisopropyl ether involves hydrogenation and etherification. The preparation of raw materials begins by adjusting the …
ABSTRACT Vinyl chloride monomer (VCM) is a primary raw material in the production of polyvinyl chloride (PVC), widely used across various sectors such as automotive, construction, and household applications. The demand for VCM in Indonesia continues to rise annually, yet a significant portion is still met through imports. To reduce import dependence and support domestic industrial growth, a vi…
ABSTRACT 1,3 Butadiene has the chemical formula C₄H₆ and the structural formula CH₂=CH-CH=CH₂. It is a conjugated diene compound, also known as buta-1,3-diene, biethylene, erythrene, and vinylethylene. 1,3 Butadiene is a colorless, non-corrosive, highly flammable, and reactive compound with a distinctive light gasoline-like aroma. It is widely used in the chemical industry, particularl…
ABSTRACT Acrylonitrile is a clear, colorless liquid with a slightly pungent odor. It is used as a chemical intermediate in the production of acrylic fibers, plastics, synthetic rubber, and numerous other products. The fluidized bed manufacturing process for acrylonitrile was developed by scientists at The Standard Oil Company (SOHIO). To meet the demand for acrylonitrile, a production plant wi…
Acacia bark (Acacia crassicarpa) contains high levels of lignin and cellulose, making it a potential material for use as a powdered adsorbent. Acacia bark powder was utilized as an adsorbent in the adsorption process of Cd(II). This study aimed to determine the optimal adsorption efficiency and capacity of acacia bark powder in the removal of Cd(II) using adsorbent dose and pH as parameters. Th…
Acacia crassicarpa bark has the potential to be used as an adsorbent in the form of powder due to its high cellulose content of approximately 50%. This research aims were to determine the optimum contact time, stirring speed, and adsorption kinetics model of Acacia crassicarpa bark powder for Cd(II) metal removal. The bark was prepared through washing, cutting, drying, grinding, and sieving pro…
Acacia crassicarpa bark is one of the abundant biomass in Riau Province and is used as raw material for adsorbent in powder form in this study to adsorb Pb(II) ions from aqueous solutions. Acacia crassicarpa bark samples were obtained from Industrial Plantation Forests in Pelalawan Regency, Riau Province. The samples were washed with distilled water, dried in the sun for ±7 days, ground, sieve…
Avocado fruit (Persea americana Mill.) has high nutrition such as healthy fats, fiber, vitamin E and vitamin C. Avocado fruit is also thought to contain many secondary metabolite compounds that can act as antioxidants and inhibitors of the α-amylase enzyme. The samples in this study were avocado varieties of mentega and miki varieties in fresh and dried conditions. Secondary metabolites from t…
This study aims to enhance students' understanding of the concept of atomic structure and the periodic system of elements in Grade X at SMA Negeri 4 Pekanbaru by implementing the Process Oriented Guided Inquiry Learning (POGIL) model. The research employed an experimental design with randomly selected control and experimental groups. To assess students' comprehension of atomic structure, pr…
ABSTRACT Bay leaf tea is a herbal drink that has many benefits for human health as an anti-virus, anti-oxidant and can reduce symptoms of hypertension and gout. This study aims to study the effect of temperature variations and drying time in producing simple drugs and to analyze the tea content of bay leaves and compare it with the SNI standard No. 01-3143- 2011. The method used is drying …
ABSTRACT Oyster mushroom baglog waste that is not utilized properly will cause problems such as environmental pollution and can also be a source of pollution for cultivated oyster mushrooms. Making biobriquettes from mushroom baglog waste is an alternative for managing oyster mushroom baglog waste. However, the briquettes produced must also be of good quality, the quality of biobriquettes …
ABSTRACT The rapid development of industry has contributed greatly to economic growth, but has also had a negative impact on the environment, especially in the form of water pollution due to industrial wastewater. One of the common pollutants is methylene blue dye, which is widely used in the textile industry. This substance is toxic, difficult to degrade, and can cause disruption to aquatic e…
ABSTRACT The rapid development of industry has contributed greatly to economic growth, but has also had a negative impact on the environment, especially in the form of water pollution due to industrial wastewater. One of the common pollutants is methylene blue dye, which is widely used in the textile industry. This substance is toxic, difficult to degrade, and can cause disruption to aquatic e…
ABSTRACT Biomass is a fuel that can be used directly or processed first into solid, liquid or gas fuel through a certain process. Liquid smoke produced from the torrefaction process is a condensation liquid that comes from heating biomass without oxygen. The clarification of liquid smoke used as a food preservative must be carried out through a distillation and adsorption process first. The ob…
ABSTRACT Biomass is a fuel that can be used directly or processed first into solid, liquid or gas fuel through a certain process. Liquid smoke produced from the torrefaction process is a condensation liquid that comes from heating biomass without oxygen. The clarification of liquid smoke used as a food preservative must be carried out through a distillation and adsorption process first. The ob…
ABSTRACT Salicylic acid has the chemical structure C7H6O3, is crystalline, white in color, has a sweet taste and is stable in free air. Salicylic acid and its derivatives are chemicals that are quite important in daily use. In the pharmaceutical field, salicylic acid is used as an analgesic, antipyretic, antioxidant, antimicrobial, antiproliferative and cytotoxic agent. In the field of cosmeti…
ABSTRACT The issue of heavy metal contamination in industrial wastewater, particularly ferrous ions (Fe²⁺), poses a serious threat to the environment and human health. One effective and eco-friendly solution is the adsorption method using biomass-based adsorbents. Coffee grounds, an organic waste rich in lignocellulose, show great potential as a raw material for biomass adsorbents. Chemical…
ABSTRACT The issue of heavy metal contamination in industrial wastewater, particularly ferrous ions (Fe²⁺), poses a serious threat to the environment and human health. One effective and eco-friendly solution is the adsorption method using biomass-based adsorbents. Coffee grounds, an organic waste rich in lignocellulose, show great potential as a raw material for biomass adsorbents. Chemical…