Benzene, an organic compound, is the simplest aromatic hydrocarbon with a chemical formula of C6H6. At room temperature, it is a sweet, flammable, colorless and transparent liquid with carcinogenic toxicity and a strong aromatic odor. It is insoluble in water, easily soluble in organic solvents, and can also be used as an organic solvent itself. The ring system of benzene is called benzene ring, and the structure after removing a hydrogen atom from the benzene ring is called phenyl, which is represented by Ph, so the chemical formula of benzene can also be written as PhH. Benzene is a basic petrochemical raw material, and its output and production technology are one of the symbols of a country's petrochemical development level.
On October 27, 2017, the list of carcinogens published by the World Health Organization's International Agency for Research on Cancer was preliminarily sorted out for reference, and benzene was included in the list of Class I carcinogens.
Foreign name: Benzene, benzol, benzeen
Alias: Rest oil
Chemical formula: C6H6
Molecular weight: 78.11
CAS login number: 71-43-2
EINECS accession number: 200-753-7
Melting point: 5.5℃
Boiling point: 80.1℃
Water soluble: insoluble
Density: 0.88 g/cm³
Flash point: -11℃
Application: Used as spices, dyes, plastics, medicines, explosives, rubber, etc.
Security description: S36/37; S45; S53
Hazard description: R11; R36/38; R45; R46; R48/23/24/25; R65
UN Dangerous Goods Number: 1114/1115
The benzene ring is the structure of the benzene molecule. It is a plane regular hexagon, each vertex is a carbon atom, and each carbon atom is combined with a hydrogen atom. The carbon-carbon bond in the benzene ring is a unique bond between single and double bonds, with a bond angle of 120° and a bond length of 1.40Å
Benzene Series Intermediates,2 4 6-Trimethylbenzaldeliyde,4-Iodo-3-Nitrobenzoic Acid Methyl Ester,4-Iodo-3-Nitrobenzoic Acid Fuxin Custchem Fine Chemical Co., Ltd. , https://www.custchemvip.com
Adopt the advantage of dynamic balancing valve
Dynamic flow balance valve so that the valve can change from time to time pressure changes in the water system to ensure that no more than the original set of water flow and absorb excessive pressure in order to achieve the entire water system with automatic pressure and flow balance, The benefits of using it are as follows: For owners and contractors: No system debugging is needed: you can save a lot of time and shorten the completion date. You do not need to install the same management system: you can increase the area and space for your use, save installation and Material costs; ease of use: Installation of the project will not affect the balance of the water system either in installments or in stages; Facilitate changes: Water system design and balance in other areas will not be affected when water systems in some areas need to be redesigned; Power Consumption: Due to the entire water system is balanced to ensure that refrigeration units (boilers, heat exchangers) and pumps to run in the best working conditions, with significant energy savings; reduce wear and reduce waste: due to ensure that the water flow will not exceed The original design, to protect the durability of all equipment, to avoid excessive traffic Resulting in copper loss; improve safety: As the flow of water system balance is automatically, to eliminate the possibility of man-made destructive regulation. For designers: Reduce the workload: No cumbersome calculation of the entire pipeline resistance, speed up the design speed; You can boldly use the Ischemic system: save the pipe, the corresponding materials and installation costs, the work of balancing the hydraulic system to the dynamic flow balance Valve to avoid other troubles caused by the imbalance of the water system Dynamic flow balance valve so that the valve can be based on changes in the water system pressure changes from time to time to ensure that will not exceed the original set of water flow and absorb excessive Pressure differential, so as to achieve the entire water system with the pressure and flow of automatic balance, therefore, the use of its benefits are: For owners and construction units: No need for system debugging: can save you a lot of time and shorten the completion date; do not need to install With the same management: You can increase the use of the area and space, saving installation and materials costs; Easy to use: the project is completed by installments or installments will not affect the balance of the water system; Easy to change: When the water system in some areas need Redesign will not affect other areas Water System Design and Balance; Reduce Power Consumption: Significant energy savings due to the balance of the entire water system, ensuring that chillers (boilers, heat exchangers) and pumps operate at optimum operating conditions; Reducing wear and reducing waste: Due to ensure that the water flow will not exceed the original design, to ensure the durability of all equipment, to avoid excessive flow caused by copper loss; improve safety: Because the water system traffic balance is automatic, eliminating the possibility of man-made destructive regulation Sex. For designers: Reduce the workload: No cumbersome calculation of the entire pipeline resistance, speed up the design speed; You can boldly use the Ischemic system: save the pipe, the corresponding materials and installation costs, the work of balancing the hydraulic system to the dynamic flow balance Valve to complete; avoid a lot of other troubles caused by water system imbalance