Odorless trichloroethane and preparation method thereof
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A technology of trichloroethane and vinyl chloride, which is applied in the field of organic compounds and its preparation, can solve problems such as the pungent smell of trichloroethane, and achieve the effect of improving the smell
Inactive Publication Date: 2011-11-23
葛兴元
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Embodiment 1
[0016] An odorless trichloroethane, comprising the following components in mass percentage: trichloroethane 99.9%, MMT methyl dipentadiene manganese tricarbonyl CMT-cyclopentadiene manganese tricarbonyl 0.1%.
[0017] A preparation method for odorless trichloroethane, comprising the following steps:
[0018] 1. Add vinyl chloride and chlorine gas into the chlorination tower, raise the temperature to 55°C-65°C for chlorination reaction, and generate 1,1,2-trichloroethane;
[0019] 2. Add NaOH with a concentration of 30% to 1,1,2-trichloroethane to carry out neutralization and saponification reaction in a washing tank to generate colorless 1,1,2-trichloroethane;
[0020] 3. Put the colorless 1,1,2-trichloroethane into the distillation tower for distillation;
[0021] 4. Add 0.1% MMT methyl dipentadiene manganese tricarbonyl CMT-cyclopentadiene manganese tricarbonyl to the distillation product, keep the temperature at 50°C and stir for 5-10 minutes to obtain odorless trichloroet...
Embodiment 2
[0023] An odorless trichloroethane, comprising the following components in mass percentage: trichloroethane 99.95%, MMT methyl dipentadiene manganese tricarbonyl CMT-cyclopentadiene manganese tricarbonyl 0.05%.
[0024] A preparation method for odorless trichloroethane, comprising the following steps:
[0025] 1. Add vinyl chloride and chlorine gas into the chlorination tower, raise the temperature to 55°C-65°C for chlorination reaction, and generate 1,1,2-trichloroethane;
[0026] 2. Add NaOH with a concentration of 30% to 1,1,2-trichloroethane to carry out neutralization and saponification reaction in a washing tank to generate colorless 1,1,2-trichloroethane;
[0027] 3. Put the colorless 1,1,2-trichloroethane into the distillation tower for distillation;
[0028] 4. Add 0.05% MMT methyl dipentadiene manganese tricarbonyl CMT-cyclopentadiene manganese tricarbonyl to the distillation product, keep the temperature at 50°C and stir for 5-10 minutes to obtain odorless trichlor...
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Abstract
The invention discloses odorless trichloroethane. The odorless trichloroethane comprises the following components, by mass, 99.9-99.95% of trichloroethane, 0.05-0.1% of methylcyclopentadienyl manganese tricarbonyl (MMT)-cyclopentadienyl manganese tricarbonyl (CMT). The invention further discloses a preparation method for the odorless trichloroethane. The method is characterized by: adding vinyl chloride (VC) and chlorine gas to a chlorination tower to carry out a chlorination reaction to prepare 1,1,2-trichloroethane, wherein the amount of the VC is the same as the amount of the chlorine gas; then adding a NaOH solution having a NaOH concentration of 30% to the 1,1,2-trichloroethane to carry out neutralizing and saponifying in a washing groove to prepare colourless 1,1,2-trichloroethane; placing the colourless 1,1,2-trichloroethane in a distillation tower to carry out distillating; adding the MMT-CMT to the resulting distilled product from the distillating treatment, and carrying out stirring at a temperature of 50 DEG C to prepare the odorless trichloroethane. According to the present invention, the odor of the trichloroethane is improved without changing the chemical property of the trichloroethane and the application effect of the trichloroethane.
Description
technical field [0001] The invention relates to an organic compound and a preparation method thereof, in particular to an odorless trichloroethane and a preparation method thereof. Background technique [0002] Trichloroethane is widely used to clean PCB residues after soldering. It is insoluble in water and can dissolve grease, lubricating oil and wax. It is non-flammable, has good chemical stability, high pressure resistance and low conductivity. It has good cleaning effect and can be used for dry cleaning. Degreaser and metal surface degreaser, can be used for ultrasonic machine cleaning and manual cleaning. But trichloroethane has a large pungent smell. Contents of the invention [0003] Purpose of the invention: the purpose of this invention is to provide a kind of odorless trichloroethane. [0004] Another object of the present invention is to provide the preparation method of this odorless trichloroethane. [0005] The technical scheme adopted in the present inve...
Claims
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Application Information
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