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Chloroethylene-synthetized series fluidized bed reactor and method

A fluidized bed reactor and synthesis method technology, applied in chemical instruments and methods, chemical recovery, organic chemistry, etc., can solve the problems of low production intensity, poor temperature control, inability to meet the deep conversion of acetylene alone, etc., and achieve the contact effect Good, maintain the effect of acetylene conversion, reduce the effect of dosage

Active Publication Date: 2012-10-24
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for the synthesis of vinyl chloride by the existing fixed bed technology, which uses a serial flow method to solve the problems that the reactor production intensity is too low and the temperature control is not good, and the existing fluidized bed technology cannot meet the needs of deep conversion of acetylene alone. A device and process method for the reaction of hydrogen chloride and acetylene to synthesize vinyl chloride in a bed reactor to achieve the purpose of deep conversion of acetylene

Method used

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  • Chloroethylene-synthetized series fluidized bed reactor and method
  • Chloroethylene-synthetized series fluidized bed reactor and method
  • Chloroethylene-synthetized series fluidized bed reactor and method

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Embodiment 1

[0038] Fluidized bed (1), (2) is combined to form a complete system (such as figure 1 shown).

[0039] Use HgCl in both fluidized bed (1) and fluidized bed (2) 2 / activated carbon catalyst (HgCl 2 The mass fraction is 10%, the particle size is 0.3mm, and the density is 650kg / m 3 ), passing saturated water with a temperature higher than 120°C into the heat exchange tube 1e to gradually increase the temperature in the fluidized bed (1) to 100-120°C. Then the gas containing hydrogen chloride and acetylene is gradually introduced into the gas through the gas distributor 1e from the gas inlet 1a (other gases are hydrogen, nitrogen and CO 2 , its volume fraction is 8% altogether, the ratio of controlling hydrogen chloride and acetylene is 1.01), and the volume space velocity of acetylene is 20h ～1 , pressure 0.1MPa. The reaction releases heat, and the heat exchange medium in the heat exchange tube 1f is switched to saturated water with a temperature lower than 95°C, and its fl...

Embodiment 2

[0042] Fluidized bed (1), (2) is combined to form a complete system (such as figure 2 shown).

[0043] Using HgCl in the fluidized bed (1) 2 / activated carbon catalyst (HgCl 2 The mass fraction is 6%, the particle size is 0.4mm, and the density is 550kg / m 3 ), all use HgCl in the fluidized bed (2) 2 / activated carbon catalyst (HgCl 2 The mass fraction is 14%, the particle size is 0.5mm, and the density is 500kg / m 3 ), passing saturated water with a temperature higher than 120°C into the heat exchange tube 1e to gradually increase the temperature in the fluidized bed (1) to 100-120°C. Then the gas containing hydrogen chloride and acetylene is gradually introduced into the gas through the gas distributor 1e from the gas inlet 1a (other gases are hydrogen, nitrogen and CO 2 , its volume fraction is 8% altogether, and the ratio of controlling hydrogen chloride and acetylene is 1.05). The volumetric space velocity of acetylene is 200h ～1 , pressure 0.4MPa. The reaction ...

Embodiment 3

[0046] Use diameter is the fluidized bed (2) of fluidized bed (1) diameter 4 / 5 and the diameter is the fluidized bed (3) of fluidized bed (1) diameter 1 / 2, fluidized bed (1), ( 2) combined with the catalyst regeneration fluidized bed (3) to form a complete system (such as image 3 shown).

[0047] Using CuCl in the fluidized bed (1) 2 / SiO 2 Catalyst (CuCl 2 The mass fraction is 6%, the particle size is 0.2mm, and the density is 1000kg / m 3 ), all use HgCl in the fluidized bed (2) 2 / activated carbon catalyst (HgCl 2 The mass fraction is 14%, the particle size is 0.5mm, and the density is 550kg / m 3 ), passing saturated water with a temperature greater than 180°C into the heat exchange tube 1f to gradually increase the temperature in the fluidized bed (1) to 170-180°C. Then gradually feed the gas containing hydrogen chloride and acetylene (other gases are vinyl chloride (40% by volume) and hydrogen, nitrogen and CO from the gas inlet 1a through the gas distributor 1e 2 (...

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Abstract

The invention relates to a chloroethylene-synthetized series fluidized bed reactor and a method, belonging to the technical field of chemical equipment and technological process. Each part structure of a fluidized bed is connected; a gas outlet (1d) of a first fluidized bed (1) is connected with a gas inlet (2a) of a second fluidized bed (2) by a pipeline, and a catalyzer regeneration fluidized bed (3) is connected with the first fluidized bed (1) or the second fluidized bed (2) by a pipeline. A catalyzer is filled in the first fluidized bed (1) and the second fluidized bed (2) from catalyzerinlets (1a, 2a); the catalyzer is chloride of bismuth, cadmium and mercury metal or phosphate of copper and bismuth and the like; the reaction is carried out; reaction gas reaches the gas outlet through a catalyzer bed layer of the second fluidized bed. The invention has the advantages of high production flux of reactor section, high operational flexibility, high ethyne transformation ratio (higher than 99.0%), high selectivity (higher than 99.0%) of generated chloroethylene, high product purity, wide variety and activity of applicable catalyzer, long time of continuous operation, low energy consumption and the like.

Description

technical field [0001] The invention relates to equipment and a process method for synthesizing vinyl chloride by reacting hydrogen chloride and acetylene, belonging to the technical field of chemical equipment and processes. Background technique [0002] Vinyl chloride is a monomer for the synthesis of polyvinyl chloride, and is a very important chemical intermediate. With the wide application of polyvinyl chloride materials in packaging materials and other fields, the output of vinyl chloride and polyvinyl chloride has increased rapidly, and the annual demand in China is about 8-10 million tons. [0003] At present, there are three methods for industrial production of vinyl chloride, that is, to synthesize vinyl chloride by reacting acetylene, ethylene or ethane with hydrogen chloride respectively. The source of ethylene is mainly the oil refining industry. Due to the rapid rise of crude oil prices in recent years, the price of ethylene has risen. Although its synthesis t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J8/28C07C21/06C07C17/08
CPCY02P20/584
Inventor 骞伟中魏飞罗国华
Owner TSINGHUA UNIV
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