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Possible quality problems of styrene during storage and measures to be taken
Problems The main problems are the generation of polymers, color change and the generation of impurities. Second, the main factors that cause these problems and styrene storage should take the following important measures 1, a reasonable selection of storage tanks Line SH/T3007-2007 article 4.2.5 states: "Some A A, B B chemicals have special storage needs, can not be used within the floating top tank. Such as styrene, in order to inhibit the polymerization needs to contact with oxygen, although styrene is a class B A liquid, but its tanks can only be used to fix the top tank." The internal structure of the fixed-top tank should be simple, the internal surface of the tank should be smooth, clean, no scars, weld tumors, minimize crossbeams, tie rods, etc., to avoid the condensation of styrene vapor accumulation. And the tank structure design must be considered to prevent styrene polymerization when the flow of hanging on the tank wall measures.
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2022-07
Characteristics and applications of styrene
Styrene is an organic compound that can be formed by both benzene and ethylene. It is a colorless and transparent liquid that is very easy to contaminate drinking water, soil and surface water, and has strong volatility and is easily volatile under light environment, so it is often stored and transported in steel drums. Currently it is widely used in synthetic resins and rubber, such as polystyrene, ABS resin and other engineering plastics.
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2022-07
Chemical properties of styrene
Styrene is a liquid at room temperature, colorless, with a pungent odor, styrene is flammable, boiling point 145.2 degrees Celsius, freezing point of -30.6 degrees Celsius, specific gravity 0.906, styrene is insoluble in water, if at 25 degrees Celsius, styrene solubility is only 0.066%. Styrene can be mixed with ether, methyl ferment, carbon disulfide, acetone, benzene, toluene and tetra-ironic carbon in any proportion. Styrene is a good solvent for natural rubber, synthetic rubber and many organic compounds. Styrene is toxic and can cause poisoning if the human body inhales too much styrene vapor. The allowable concentration of styrene in the air is 0.1mg/L. Styrene vapor and air will form an explosive mixture.
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2022-07
Polystyrene
Polystyrene (PS) is a polymer synthesized from styrene monomer by free radical addition reaction, the chemical formula is (C8H8)n. It is a colorless and transparent thermoplastic with a glass transition temperature above 100°C, so it is often used to make various disposable containers that need to withstand the temperature of boiling water, and disposable foam lunch boxes, etc.
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2022-07
Styrene
Styrene, an organic compound with chemical formula C8H8, the electron of vinyl is conjugated with benzene ring, insoluble in water, soluble in most organic solvents such as ethanol, ether, etc. It is an important monomer for synthetic resin, ion exchange resin and synthetic rubber, etc.
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2022-07
Problems with working conditions for measuring polystyrene levels
At the beginning of the 20th century, polystyrene level measurement had been a major problem in the petrochemical industry. At that time, a domestic enterprise had used a variety of liquid level measurement instruments, the results were not satisfactory. Finally, after much research and consultation, a foreign brand of radar level meter was used, and the measurement only achieved the expected results. Today, let's take a look at what are the working conditions that need to be considered for the radar level meter to measure polystyrene in the molten state?
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2022-07
The problem of recycling of waste polystyrene plastics at home and abroad
Large-scale closed recycling plant has its undisputed advanced, but the cost of recycling is very high, and only suitable for a large number of waste polystyrene, especially a large number of waste polystyrene foam places. In terms of general waste polystyrene foam, it is difficult to concentrate in large quantities, so the investment in the construction of large-scale recycling plant or workshop method in China currently has some difficulties, but some small and simple recycling equipment is more suitable for the situation in China.
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2022-07
Polystyrene uses and synthesis methods
Polystyrene is the product of the polymerization reaction of styrene monomer, a polymer compound. Polystyrene was first obtained from a volatile oil in the natural resin balsam, and was first produced in 1930 by the German company Farben by continuous ontogenetic polymerization on a trial basis, and subsequently, industrial production was achieved, and it is an early developed variety of plastic. 1982 annual production was second only to polyethylene and polyvinyl chloride.
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2022-07
2021 China Polystyrene Production, Capacity, Startup Rate, Import, Export and Price Trend Analysis
China's polystyrene production capacity continues to grow, data show that in 2019-2021, China's polystyrene production capacity of 3.686 million tons, 3.85 million tons and 4.55 million tons, respectively.
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2022-07
Performance and characteristics of polystyrene PS
Polystyrene is abbreviated as PS, plus, it is made from the polymerization of styrene. According to the polymerization process can be divided into ontology polymerization, solution polymerization, suspension polymerization, emulsion polymerization and isotonic polymerization and other polymerization products, the molecular formula is - [CHC6H5-CH2]-n, the industry now mainly uses the ontology polymerization method and suspension polymerization method. Polystyrene has a general-purpose polystyrene (GPPS), high-impact polystyrene (HIPS) and expanded polystyrene (EPS) three. The properties and characteristics of polystyrene PS are as follows.
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