CAJ | 학술논문

油酸聚合制备二聚酸的工业化生产过程中，采用活性白土为催化剂，因回收困难等问题，废白土一般作为废物被掩埋，不但污染环境还造成原料和产品浪费。为减少活性白土用量，本文在原工艺基础上，通过通入CO2的方法来抑制油酸脱羧。实验研究了反应温度、压力、白土用量、Li2CO3用量、H2O用量、反应时间等6个因素对油酸二聚反应的影响，得出了适宜的工艺条件。研究结果表明，当通入反应釜中 CO2的压力达到0.5 M Pa时，反应温度可以从原工艺的240℃提高到250℃，在相同二聚酸产率和产品指标下，加入CO2的工艺可比不加 CO2工艺减少25%的白土使用量。CO2的加入对脱羧有很好的抑制作用，提高了反应温度，减少了催化剂活性白土的使用量。
유산취합제비이취산적공업화생산과정중，채용활성백토위최화제，인회수곤난등문제，폐백토일반작위폐물피엄매，불단오염배경환조성원료화산품낭비。위감소활성백토용량，본문재원공예기출상，통과통입CO2적방법래억제유산탈최。실험연구료반응온도、압력、백토용량、Li2CO3용량、H2O용량、반응시간등6개인소대유산이취반응적영향，득출료괄의적공예조건。연구결과표명，당통입반응부중 CO2적압력체도0.5 M Pa시，반응온도가이종원공예적240℃제고도250℃，재상동이취산산솔화산품지표하，가입CO2적공예가비불가 CO2공예감소25%적백토사용량。CO2적가입대탈최유흔호적억제작용，제고료반응온도，감소료최화제활성백토적사용량。
In the industrial process of oleic acid polymerization,activated clay was used as catalyst. The used clay was generally treated as waste to be buried because of difficult recovery,not only polluting the environment but also causing a waste of raw materials and products. In order to reduce the amount of activated clay,a new technology was studied under carbon dioxide circumstance. The effects of reaction temperature,pressure,mass fraction of clay,mass fraction of Li2CO3,mass fraction of H2O and reaction time on the synthesis process of dimer acid were discussed. The yield of dimer acid was considered a primary evaluating index. Reaction temperature could be elevated from 240 ℃ to 250 ℃when the reaction occurred under 0.5 M Pa CO2. The new process decreased the amount of activated clay by 25%at the same yield of dimer acid compared to the existing process. Adding carbon dioxide has a good inhibition on decarboxylation,this process decreased the amount of activated clay and made possible oleic acid polymerization at a higher temperatures.