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CN1069019A Expired / Lapsed CN ⏱️ 0.0 years remaining

1, the improvement separating and purifying method of 1-C2H4F2 C2H4F2

Assignee: Zhejiang Lantian Environmental Protection Hi Tech Co Ltd
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Filing: 1992-01-15
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Granted: —
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Expires: 2012-01-15
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Abstract

Abstract Translated from Chinese 本发明涉及一种由氯乙烯与氟化氢液相催化氟 化制备HFC-152a的改进方法，反应以SbCl 5 ， SbF 5 ，HSO 3 F，SnCl 4 ，SnF 4 ，TaF 5 ，TiCl 4 或它们彼此 间的混合物作催化剂，反应温度0～70℃，反应压力 0.30～0.80MPa，反应冷凝器顶部温度-10℃～20℃， 氯乙烯的进料速度0.3～0.6公斤/公斤催化剂·小 时，无水氟化氢与氯乙烯的摩尔比2.2～2.5。本发明 氯乙烯转化率＞99％，HFC-152a的选择性＞95％， 催化剂寿命可获很大提高。 The present invention relates to an improved method for preparing HFC-152a by liquid-phase catalytic fluorination of vinyl chloride and hydrogen fluoride. The reaction is carried out with SbCl 5 , SbF 5 , HSO 3 F, SnCl 4 , SnF 4 , TaF 5 , TiCl 4 or between them The mixture is used as a catalyst, the reaction temperature is 0-70°C, the reaction pressure is 0.30-0.80MPa, the top temperature of the reaction condenser is -10°C-20°C, the feed rate of vinyl chloride is 0.3-0.6 kg/kg catalyst hour, anhydrous hydrogen fluoride The molar ratio to vinyl chloride is 2.2 to 2.5. The vinyl chloride conversion rate of the present invention is more than 99%, the selectivity of HFC-152a is more than 95%, and the service life of the catalyst can be greatly improved.

Inventors

  • 👤 颜国飞
  • 👤 郭心正
  • 👤 刘明华
  • 👤 毛汉卿
  • 👤 周锦华
  • 👤 李妍萍

Bibliographic Details

Application Number —
Jurisdiction CN
Data Source google_patents
Last Synchronized 2026-11-05 18:19
CPC Classifications
—

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 106 words
1, a kind of with SnCl 4 Make catalyzer and fluoridize the method for preparing HFC-152a by vinylchlorid and anhydrous hydrogen fluoride liquid-phase catalysis, it is characterized in that can also SbCl 5 , SbF 5 , HSO 3 F, SnF 4 , TaF 5 , TiCl 4 Or SnCl 4 , SbCl 5 , SnF 5 , HSO 3 F, SnF 4 , TaF 5 , TiCl 4 Mixture as catalyst to each other, 0～70 ℃ of temperature of reaction, reaction pressure 0.30～0.80MPa, the input speed of vinylchlorid is at 0.3～0.6 kg/kg catalyzer hour, and the mole proportioning of hydrogen fluoride and vinylchlorid is 2.0～2.5.
Claim 2
Dependent Claim 106 words
1, a kind of with SnCl 4 Make catalyzer and fluoridize the method for preparing HFC-152a by vinylchlorid and anhydrous hydrogen fluoride liquid-phase catalysis, it is characterized in that can also SbCl 5 , SbF 5 , HSO 3 F, SnF 4 , TaF 5 , TiCl 4 Or SnCl 4 , SbCl 5 , SnF 5 , HSO 3 F, SnF 4 , TaF 5 , TiCl 4 Mixture as catalyst to each other, 0～70 ℃ of temperature of reaction, reaction pressure 0.30～0.80MPa, the input speed of vinylchlorid is at 0.3～0.6 kg/kg catalyzer hour, and the mole proportioning of hydrogen fluoride and vinylchlorid is 2.0～2.5.
Claim 3
Dependent Claim 22 words
2, by claim 1 said method, it is characterized in that reacting the condenser overhead temperature and be controlled at-10 ℃～20 ℃.
Claim 4
Dependent Claim 17 words
3, by claim 1 said method, it is characterized in that temperature of reaction is 10～60 ℃.
Claim 5
Dependent Claim 31 words
4,, before it is characterized in that carrying out the vinylchlorid fluoridation, at 30～50 ℃ of down logical HF, made catalyst activation 1～8 hour earlier by claim requirement 1 said method.

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