431-63-0Relevant academic research and scientific papers
METHOD FOR PURIFYING 1,1,1,2,3-PENTAFLUOROPROPANE AND USE THEREOF FOR OBTAINING HIGH-PURITY 2,3,3,3-TETRAFLUOROPROPENE
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Paragraph 0230, (2020/11/30)
The present invention relates to a process for purifying 1,1,1,2,3-pentafluoropropane, comprising the steps of: i) providing a composition A1 comprising 1,1,1,2,3-pentafluoropropane and 1,1,1,3-tetrafluoropropane; ii) purifying, preferably distilling, said composition A1 under conditions that are sufficient to form at least two streams including a first stream comprising 1,1,1,2,3-pentafluoropropane and a second stream comprising 1,1,1,3-tetrafluoropropane. The present invention also relates to a process for producing 2,3,3,3-tetrafluoropropene and a composition comprising 2,3,3,3-tetrafluoropropene.
Process for preparation of 1,2,3,3,3-pentafluoropropene from hexafluoropropene
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Paragraph 0058-0081, (2020/08/18)
The invention belongs to the technical field of preparation of pentafluoropropylene, and particularly relates to a method for preparing 1,2,3,3,3-pentafluoropropylene from hexafluoropropylene. According to the method, hexafluoropropylene and hydrogen are taken as raw materials, and 1,2,3,3,3-pentafluoropropylene is prepared through direct one-step reaction under the action of a solid mixture catalyst; the solid mixture catalyst is a mixture of one or more of oxyhalides of transition metals, IIA and IIIA group metals or derivatives thereof and a VIII group metal-based compound. Compared with amethod for preparing 1,2,3,3,3-pentafluoropropylene from hexafluoropropylene through a hydrogenation and HF removal two-step method, the solid mixture catalyst used in the method provided by the invention has higher pentafluoropropylene selectivity and reaction stability.
Method for the 1,2,3,3,3-pentafluoropropene production
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Paragraph 0086-0092; 0093-0096; 0100; 0101, (2018/09/25)
In the present invention from a number 1, 2, 3, 3, 3 - pentafluoropropene (HFO provided 1225ye) hexafluoropropylene (HFP) method for bath a number [...] substrate. The upper index 2, 3, 3, 3 - 1, 2, 3, 3, 3 - pen hit [phul [phul] base oro pro pen phenolic resin foam which is very low it is a coolant 1234ze (HFO provided 1234yf) HFP H2S-free capacity as an intermediate of a hydrogenating catalyst 1, 1, 2, 3, 3, 3 - hexafluoropropane (HFC-a 236ea) is patterned to expose a hydrogen on generating; reacting a hydrogen fluoride catalyst obtained in said HFC provided 236ea and subjected to a high pressure liquid coolant bath of hydrogen fluoride in an HFO provided 1225ye number number 2000. Reacting a number when a HFC-a 236ea HFP hydrogen and vapor phase high pressure liquid coolant, reaction properly time to prevent the hydrogen consumed only unreacted hydrogen separation and circulating process can be eliminated, such as returning excess of hydrogen by a prefilled billion number. In hydrogenation of the resulting gaseous products another separation step (HFC-a 236ea) followed by a high pressure liquid coolant vapor reaction directly without a perhalogenated alkyl HFO provided 1225ye number 2000. In addition in the present invention HFP hydrogenation reaction temperature and number of stand-alone Dichlorethane efficiently number for the HFC-a 236ea perhalogenated reactions the method generates a control hydrogenation cycled in an HFC-a 236ea surfaces have diameters less than 2000. (by machine translation)
METHOD FOR PREPARING 2,3,3,3-TETRAFLUOROPROPENE AND 1,3,3,3-TETRAFLUOROPROPENE
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Page/Page column 0044-0046, (2017/11/29)
A method for preparing 2,3,3,3-tetrafluoropropene and 1,3,3,3-tetrafluoropropene, including: providing a first reactor including a first section, a second section, and a third section, with each section being filled with different catalysts, preheating hexafluoropropylene and hydrogen, and introducing the hexafluoropropylene and the hydrogen to the first reactor to yield a first mixture including: 1,1,1,2,3-pentafluoropropane, 1,1,1,2,3,3-hexafluoropropane, and hydrogen fluoride; introducing the first mixture to a first distillation column to yield 1,1,1,2,3,3-hexafluoropropane at a top of the first distillation column and 1,1,1,2,3-pentafluoropropane and hydrogen fluoride at a bottom of the first distillation column, recycling the 1,1,1,2,3,3-hexafluoropropane to a lower part of the first section of the first reactor, and introducing the 1,1,1,2,3-pentafluoropropane and the hydrogen fluoride to a second reactor to yield a second mixture including: 2,3,3,3-tetrafluoropropene, 1,3,3,3-tetrafluoropropene, hydrogen fluoride, and 1,1,1,2,3-pentafluoropropane; and performing water washing, alkaline washing, drying, and distillation on the second mixture to yield 2,3,3,3-tetrafluoropropene and 1,3,3,3-tetrafluoropropene.
Method for co-preparation of 2,3,3,3-tetrafluoropropene and 1,3,3,3-tetrafluoropropene from hexafluoropropylene
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Paragraph 0152; 0153; 0154; 0155, (2017/01/05)
2, 3, 3, 3-hexafluoro propylene, the 1, 3, 3, 3-and -1234z3 (HFO-1234yf) (HFP) from -1234z3 (HFO-1234ze, E-form) simultaneous manufacturing method is provided. (by machine translation)
Method for co-preparation of 2,3,3,3-tetrafluoropropene and 1,3,3,3-tetrafluoropropene from hexafluoropropylene
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Paragraph 0152; 0153; 0154; 0155; 0156-0159, (2017/01/02)
Provided is a manufacturing method of 2,3,3,3-tetrafluoropropene (HFO-1234yf) and 1,3,3,3- tetrafluoropropene (HFO-1234ze, E-form) from hexafluoropropylene (HFP) at the same time. According to the present invention, hydrogen fluoride as a byproduct can be obtained as at least 35 wt% of hydrofluoric acid or a hydrofluoric acid solution using an absorption tower without a complex distillation process for commercialization.(AA) First hydrogenation(BB) First de-hydrogen fluoride(CC) First de-hydrogen fluoride adsorption(DD) First distillation(EE) Second hydrogenation(FF) Second distillation(GG) Second de-hydrogen fluoride(HH) Second de-hydrogen fluoride adsorption(II) Third distillation(JJ) EfiningCOPYRIGHT KIPO 2015
METHOD AND APPARATUS FOR CONTINUOUSLY PRODUCING 1,1,1,2,3-PENTAFLUOROPROPANE WITH HIGH YIELD
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Paragraph 0110-0111, (2014/05/20)
A method and apparatus for method of continuously producing 1,1,1,2,3-pentafluoropropane with high yield is provided. The method includes (a) bringing a CoF3-containing cobalt fluoride in a reactor into contact with 3,3,3-trifluoropropene to produce a CoF2-containing cobalt fluoride and 1,1,1,2,3-pentafluoropropane, (b) transferring the CoF2-containing cobalt fluoride in the reactor to a regenerator and bringing the transferred CoF2-containing cobalt fluoride into contact with fluorine gas to regenerate a CoF3-containing cobalt fluoride, and (c) transferring the CoF3-containing cobalt fluoride in the regenerator to the reactor and employing the transferred CoF3-containing cobalt fluoride in Operation (a). Accordingly, the 1,1,1,2,3-pentafluoropropane can be continuously produced with high yield from the 3,3,3-trifluoropropene using a cobalt fluoride (CoF2/CoF3) as a fluid catalyst, thereby improving the reaction stability and readily adjusting the optimum conversion rate and selectivity.
Method and apparatus for continuously producing 1,1,1,2,3-pentafluoropropane with high yield
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Paragraph 0095-0097, (2014/06/11)
A method and apparatus for method of continuously producing 1,1,1,2,3-pentafluoropropane with high yield is provided. The method includes (a) bringing a CoF3-containing cobalt fluoride in a reactor into contact with 3,3,3-trifluoropropene to produce a CoF2-containing cobalt fluoride and 1,1,1,2,3-pentafluoropropane, (b) transferring the CoF2-containing cobalt fluoride in the reactor to a regenerator and bringing the transferred CoF2-containing cobalt fluoride into contact with fluorine gas to regenerate a CoF3-containing cobalt fluoride, and (c) transferring the CoF3-containing cobalt fluoride in the regenerator to the reactor and employing the transferred CoF3-containing cobalt fluoride in Operation (a). Accordingly, the 1,1,1,2,3-pentafluoropropane can be continuously produced with high yield from the 3,3,3-trifluoropropene using a cobalt fluoride (CoF2/CoF3) as a fluid catalyst, thereby improving the reaction stability and readily adjusting the optimum conversion rate and selectivity.
PROCESS FOR MAKING TETRAFLUOROPROPENE
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Paragraph 0019; 0020, (2013/08/28)
The present invention describes a process for making CF3CH═CHF (HFO-1234ze). The process involves the addition of carbon tetrachloride (CCl4) to 1,2-dichloroethylene to form CCl3CHClCHCl2. The compound CCl3CHClCHCl2 thus can then either be treated with HF to produce CF3CHClCHClF as the main product, or it can be converted to CCl2═CHCHCl2 (1230za) by dechlorination. CCl2═CHCHCl2 can be treated with HF such that the main product obtained is CF3CHClCHClF. CF3CH═CHCl may be produced as a by-product, but upon treatment with HF, it affords the compound CF3CHClCHClF. The desired compound, CF3CH═CHF (HFO-1234ze), is obtained as a trans/cis mixture by dehydrochlorination of CF3CH2CHClF or by dechlorination of CF3CHClCHClF.
METHOD FOR PRODUCING HEXAFLUOROPROPANE
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Page/Page column 2, (2012/05/04)
The present invention relates to a method for producing 1,1,1,2,3,3-hexaafluoropropane, involving reacting gaseous phase hexafluoropropene with hydrogen in a superstoichimetric amount in the presence of a hydrogenation catalyst in a reactor, and recirculating a part of the gaseous effluent from the reactor.
