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The FAQs about carbon tetrachloride

By Thomas Huang October 8th, 2023 83 views
The following is the Frequently Asked Questions on Carbon Tetrachloride ( CTC ), from easy to hard, that would help you learn this compound fast.

Q: What is carbon tetrachloride ?
A: It is an organic compound, a polyhalogenated hydrocarbon formed when all four hydrogen atoms in the methane molecule are replaced by chlorine atoms. The chemical formula of carbon tetrachloride is CCl4.

Q: What's the CCl4 common name?
A: Carbon tetrachloride's common name is tetrachloromethane.

Q: What is the carbon tetrachloride Lewis structure?
A: carbon tetrachloride lewis structure

Q: Is carbon tetrachloride polar or nonpolar?
A: Carbon tetrachloride is nonpolar.
The four chlorine atoms in the carbon tetrachloride molecule are symmetrically distributed around the carbon atom, and the electronegativity of all four chlorine atoms is equal, so the electron cloud of the carbon tetrachloride molecule is uniformly distributed and has no polarity.

Q: What is the molar mass of carbon tetrachloride?
A: 153.822 g/mol.

Q: What is carbon tetrachloride used for?
A: Carbon tetrachloride (CTC)  is used for producing cinnamic acid, tetrachloroethylene, chloroform, methylene chloride, methylene chloride, other chlorinated hydrocarbons, intermediates of pyrethroid pesticides, and inorganic metal chlorides.
Among them, chloroform is a bulk chemical, that is widely used. Catalytic hydrogenation CTC to produce chloroform can not only solve the problem of environmental pollution but also has obvious economic benefits, so the conversion of CTC into chloroform is one of the best solutions to deal with CTC.

Q: Take a recipe as a sample of using carbon tetrachloride directly.
Speciality paint stripper: methylene chloride 44; sodium alkylbenzene sulfonate 4; gum starch ethanolamine 12; butyl acetate 20; carbon tetrachloride 4; ethanol 10; paraffin 6.
Speciality paint stripper

Q: How many methods to produce carbon tetrachloride?
A: There are many ways to make CTC,  including thermal chlorination of methane, chlorination of carbon disulfide, co-production of tetrachloroethylene, phosgene catalysis, oxychlorination of methane, high-pressure chlorosis, and hydrochlorination of methanol.

Q: Which are the commonly used methods of making carbon tetrachloride?
1、Thermal chlorination of methane
Methane mixed with chlorine.
Thermal chlorination reaction occurs at 400-430 ° C.
The crude products and by-products of hydrochloric acid.
The finished product could be obtained after neutralization, drying, distillation, and purification of the crude products.
Raw material consumption quota:
natural gas (containing methane 98%) 210m3, liquid chlorine 2850kg/t.
2、Carbon disulfide method
Chlorine and carbon disulfide react at 90-100 ℃ by using iron as a catalyst. Get the finished products after the fractionation, neutralization, and distillation of the crude products. 

Q: Give a tetrachloromethane formula to make it into chloroform.
A: It is a hydrogenation. Under the optimum reaction conditions within the experimental range, i.e., reaction temperature of 393 K, hydrogen pressure of 4 MPa, mass fraction of Pt in the catalyst of 018 %, reaction time of 22 h, the conversion of carbon tetrachloride and the selectivity of chloroform were both above 90 %.
CCl4 + H2 ===CHCl3 + HCl
CCl4 + H2=== CH2Cl2 + HCl
CCl4 + H2 ===CH3Cl + HCl
CCl4 + H2 ===CH4 + HCl

Q: What are the devices of the above formula?
A: High-pressure tubular reactor and Gas Chromatograph.
Specification of the high pressure tubular reactor :
stainless steel, 25 mm × 20 mm × 160 mm, pressure 5 MPa. 

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