A system and method for preparing pentafluoroethane

A pentafluoroethane and pipeline technology, applied in the field of systems for preparing pentafluoroethane, can solve the problems of high raw material cost, unachievable yield, difficult separation, etc. The effect of simple process conditions

CN104557443BInactive Publication Date: 2016-07-06丁霞 +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2016-07-06
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a system for preparing pentafluoroethane, which comprises a first reactor, a first separating tower, a second reactor, a second separating tower, a condensing tower, a third separating tower, an HCl absorption tower, a fourth separating tower, a liquid-phase water alkali washing system, a light component removal tower, a rectification tower, an extraction tower, a flash tower, an extractant recovery tower, an HCFC-124 recovery light component removal tower, an HFC-134a recovery rectification tower, an HCFC-124 recovery rectification tower, a CFC-115 recovery light component removal tower, a CFC-115 recovery rectification tower and the like. The system only relates to fluoridation reaction. The concentration of the pentafluoroethane product prepared by the system is 99.6% above. A water separator is added to the reaction section of the system, thereby solving the problem of lower conversion rate caused by catalyst deactivation. The hydrochloric acid, HFC-134a and other byproducts generated in the production process of the system can be recovered.
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Description

technical field

[0001] The invention relates to a system and method for preparing pentafluoroethane, belonging to the field of chemical industry. Background technique

[0002] The chemical name of pentafluoroethane is 1,1,1,2,2-pentafluoroethane. It is a fluorocarbon compound that is harmless to the ozone layer. As a refrigerant, it is mainly used in air conditioners, industrial and commercial refrigeration, chillers and other industries. Among them, it is used to prepare binary and ternary mixed refrigerants such as R404A, R407C, R-410A, and R507 to replace R22 and R12. Pentafluoroethane is an important component of environmentally friendly mixed refrigerants such as R-410A. There is a huge room for market development. Pentafluoroethane can also be used as a fire extinguishing agent.

[0003] At present, the preparation of pentafluoroethane mainly has the following deficiencies: 1, the preparation process using trichloroethylene as a raw material has a long process route ...

Examples

Embodiment Construction

[0016] Such as figure 1The shown system for preparing pentafluoroethane includes an AHF storage tank 1, a PCE storage tank 2, a first reactor 3, a first separation tower 4, a second separation tower 5, a second reactor 6, a condensation tower 7, The third separation tower 8, the HCl absorption tower 9, the fourth separation tower 10, the liquid-phase water alkali washing system 11, the light removal tower 12, the incineration system 13, the rectification tower 14 with raffinate tank and buffer tank, extraction tower 15. Product inspection tank 16, flash tower 17, 1# air bag 18, first-level CFC-115 concentration tank 19, extraction agent recovery tower 20, second-level CFC-115 concentration tank 21, HCFC-124 recovery light removal tower 22, HFC-134a recovery rectification tower 23, HFC-134a purification unit 24, HCFC-124 recovery rectification tower 25, CFC-115 recovery light removal tower 26, CFC-115 recovery rectification tower 27, etc.; wherein AHF storage tank 1 and The PC...