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一、氯氟烃(CFC)替代物的研制、生产用替代氟里昂HFC-134a,HFC-152a取代原来CFC系列产品做冰箱制冷剂的问题。美国杜邦公司观点:一步到位,采用HFC-134a(以下简称134a),原因是: (1)134a与原来使用的CFC-11,CFC-12,CFC-113在易燃性上无区别,不会因用户使用冰箱时制冷剂万一泄露而带来生命和财产危害。从公司信誉上考虑,在此问题上应达到100％的保险。 (2)该公司从1975年开始基础研究,迄今已投入5亿美元,还计划投入5亿美元,并
1. Development and production of alternatives to chlorofluorocarbons (CFCs) Replaced by Freon HFC-134a, HFC-152a replaced the original CFC series as refrigerator refrigerants. DuPont’s view: One step, using HFC-134a (hereinafter referred to as 134a), because: (1) 134a and the original use of CFC-11, CFC-12, CFC-113 no difference in flammability, will not The danger of life and property is caused by leakage of the refrigerant when the user uses the refrigerator. Considering the credibility of the company, 100% insurance should be achieved on this issue. (2) The company started basic research in 1975 and has so far invested 500 million U.S. dollars. It also plans to invest 500 million U.S. dollars, and