Producing 1, 1-difluoroethane from acetylene involves preheating gaseous mixture of acetylene and hydrogen fluoride gas before passing through catalyst bed, which is maintained at higher temperature, and catalyst is prepared by using gama-alumina doped with suitable metal nitrates
	VASHI P G; NIKITHA K M; GUPTA T D; CHAKRABORTY S; SINGH R L; PUNNA N; THOMAS V B; SRINIVAS P V S S; MADABHUSHI S
	2023-07-21
专利权人	NAVIN FLUORINE INT LTD (NAVI-Non-standard) ; CSIR INDIAN INST CHEM TECHNOLOGY (CSIR-Non-standard)
申请日期	2023-07-21
专利号	IN202341049386-A
成果简介	NOVELTY - Producing 1,1-difluoroethane from acetylene involves preheating gaseous mixture of acetylene and hydrogen fluoride gas to 120℃ before passing through the catalyst bed. The catalyst bed is maintained at a higher temperature between 230-300℃. The contact time between the gaseous mixture and catalyst bed is 21-75 seconds. The catalyst is prepared by using γ-alumina doped with suitable metal nitrates. USE - Method for producing 1, 1-difluoroethane from acetylene. ADVANTAGE - The method enables to produce 1, 1- difluoroethane from acetylene using a commercially viable method, using a novel catalyst and avoiding use of rare earth metal or metal composite catalysts which provides higher selectivity and conversion rate. The γ-alumina catalyst doped with Mg(NO3)2.6H2O showed the best results in terms of conversion and selectivity, as compared to other catalysts. Thus, the γ -Alumina catalyst doped with Mg(NO3)2.6H2O demonstrates improved catalytic activity and selectivity for the gas phase hydrofluorination reaction of acetylene to obtain HFC-152a.The resulting product from a new catalyst provides for a conversion rate of over 99% and selectivity of HFC-152a above 95%. The process provides very high conversion of acetylene with high selectivity of HFC-152a.
IPC 分类号	A61K-031/357 ; A61K-031/366 ; A61K-047/10 ; A61K-047/14 ; A61K-047/44 ; A61K-009/107 ; A61P-033/06
国家	印度
专业领域	化学化工
语种	英语
成果类型	专利
文献类型	科技成果
条目标识符	http://119.78.100.226:8889/handle/3KE4DYBR/21176
专题	中国科学院新疆生态与地理研究所
作者单位	1.NAVIN FLUORINE INT LTD (NAVI-Non-standard) 2.CSIR INDIAN INST CHEM TECHNOLOGY (CSIR-Non-standard)
推荐引用方式 GB/T 7714	VASHI P G,NIKITHA K M,GUPTA T D,et al. Producing 1, 1-difluoroethane from acetylene involves preheating gaseous mixture of acetylene and hydrogen fluoride gas before passing through catalyst bed, which is maintained at higher temperature, and catalyst is prepared by using gama-alumina doped with suitable metal nitrates. IN202341049386-A[P]. 2023.

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