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机构地区:[1]太原科技大学化学与生物工程学院,山西太原030024 [2]内江师范学院,四川内江641000
出 处:《精细化工》2014年第6期796-800,共5页Fine Chemicals
基 金:四川省应用基础研究项目(2011JY0102)~~
摘 要:以2,2-二(4-羟基苯基)六氟丙烷为原料,分别经硝化和还原反应合成出2,2-二(3-氨基-4-羟基苯基)六氟丙烷。并在实验室小试成功后,进行工厂中试研究,以确定中试的各个工艺参数。结果表明,对于第1步硝化反应,以乙醇做溶剂,用量为n(乙醇)/n〔2,2-二(4-羟基苯基)六氟丙烷〕=4,n(稀硝酸)/n〔2,2-二(4-羟基苯基)六氟丙烷〕=2.15,反应温度为60℃,反应时间为6 h的条件下,合成2,2-二(3-硝基-4-羟基苯基)六氟丙烷的产率达到最高值96%。对于第2步还原反应,采用自制FeCl3/活性炭为催化剂,乙醇做溶剂,n(水合肼)/n〔2,2-二(3-硝基-4-羟基苯基)六氟丙烷〕=0.2,m(FeCl3/活性炭)/m〔2,2-二(3-硝基4-羟基苯基)六氟丙烷〕=0.05,反应温度为85℃,反应时间为10 h的条件下,合成2,2-二(3-氨基-4-羟基苯基)六氟丙烷的产率达到最高值92%。该工艺条件在工厂已进行了中试研究,确定了工业实验的各个工艺参数和工艺条件。Using 2,2-bis ( 4-hydroxyphenyl ) hexafluoropropane as raw material, 2,2-bis ( 3-amino-4- hydroxyphenyl) hexafluoropropane was synthesized by nitrification reaction and reduction reaction. The pilot-scale study was carried out to determine the technological data after the success of laboratory experiment. The results indicate that, for the nitrification reaction, the conditions of n ( ethanol )/n [ 2, 2-his ( 4-hydroxyphenyl ) hexafluoropropane ~ = 4, n ( the dilute nitric acid )/n [ 2, 2-his ( 4- hydroxyphenyl) hexafluoropropane] = 2. 15,60 ~C and the reaction time (6 h ) can give the highest yield of 2,2-bis ( 3-nitro-4-hydroxyphenyl ) hexafluoropropane ( 96% ). As for the reduction reaction, using FeC13/ activated carbon as catalyst and ethanol as solvent, the conditions of n (hydrazine hydrate)/n [ 2, 2-bis (3-nitro-4-hydroxyphenyl) hexafluoropropane ] = 0. 2, m ( FeCl3/ activated carbon)/m [ 2,2-his (3-nitro-4-hydroxyphenyl) hexafluoropropane ] = 0.05,85℃ and the reaction time ( 10 h) can give the highest yield of 2,2-bis (3-amino-4-hydroxyphenyl) hexafluoropropane (92%). The above process conditions have been studied in the factory and the technological data and the technological conditions have been determined.
关 键 词:2 2-二(3-氨基4-羟基苯基)六氟丙烷 工厂中试 精细化工中间体
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