化工进展
化工進展
화공진전
CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
2015年
6期
1804-1808
,共5页
乙酸丁酯%液体石蜡%废水%萃取%回收
乙痠丁酯%液體石蠟%廢水%萃取%迴收
을산정지%액체석사%폐수%췌취%회수
butyl acetate%liquid paraffin%wastewater%extraction%recovery
为实现制药工业低浓度含乙酸丁酯废水的资源化利用，通过考察生物质及乙酸丁酯的初始浓度、萃取温度、萃取时间、相比（萃取剂与含酯废水的体积比）等因素对萃取率的影响，建立了以液体石蜡为萃取剂的对含酯模拟废水的萃取回收体系。结果表明：生物质浓度对萃取效果影响不大，当相比为1﹕1、时间15min、温度25℃时，对含酯0.7g/100mL的模拟废水，液体石蜡的萃取率可达98%。利用多级萃取，将已负载乙酸丁酯的萃取剂液体石蜡继续处理新鲜废水，验证了萃取剂对乙酸丁酯的富集能力强而稳定。通过选取适宜相比进行多级萃取，可将乙酸丁酯富集于液体石蜡中，从而明显降低后处理的能耗。对萃取相进行减压蒸馏，可将乙酸丁酯从液体石蜡中分离出来。经检测，蒸馏液为质量浓度约98%的乙酸丁酯，且含水量低于0.1%，可回用作药物提取剂；同时液体石蜡得以再生，且萃取效果良好。
為實現製藥工業低濃度含乙痠丁酯廢水的資源化利用，通過攷察生物質及乙痠丁酯的初始濃度、萃取溫度、萃取時間、相比（萃取劑與含酯廢水的體積比）等因素對萃取率的影響，建立瞭以液體石蠟為萃取劑的對含酯模擬廢水的萃取迴收體繫。結果錶明：生物質濃度對萃取效果影響不大，噹相比為1﹕1、時間15min、溫度25℃時，對含酯0.7g/100mL的模擬廢水，液體石蠟的萃取率可達98%。利用多級萃取，將已負載乙痠丁酯的萃取劑液體石蠟繼續處理新鮮廢水，驗證瞭萃取劑對乙痠丁酯的富集能力彊而穩定。通過選取適宜相比進行多級萃取，可將乙痠丁酯富集于液體石蠟中，從而明顯降低後處理的能耗。對萃取相進行減壓蒸餾，可將乙痠丁酯從液體石蠟中分離齣來。經檢測，蒸餾液為質量濃度約98%的乙痠丁酯，且含水量低于0.1%，可迴用作藥物提取劑；同時液體石蠟得以再生，且萃取效果良好。
위실현제약공업저농도함을산정지폐수적자원화이용，통과고찰생물질급을산정지적초시농도、췌취온도、췌취시간、상비（췌취제여함지폐수적체적비）등인소대췌취솔적영향，건립료이액체석사위췌취제적대함지모의폐수적췌취회수체계。결과표명：생물질농도대췌취효과영향불대，당상비위1﹕1、시간15min、온도25℃시，대함지0.7g/100mL적모의폐수，액체석사적췌취솔가체98%。이용다급췌취，장이부재을산정지적췌취제액체석사계속처리신선폐수，험증료췌취제대을산정지적부집능력강이은정。통과선취괄의상비진행다급췌취，가장을산정지부집우액체석사중，종이명현강저후처리적능모。대췌취상진행감압증류，가장을산정지종액체석사중분리출래。경검측，증류액위질량농도약98%적을산정지，차함수량저우0.1%，가회용작약물제취제；동시액체석사득이재생，차췌취효과량호。
In order to realize the recycle of low-concentration butyl acetate(BA)-containing wastewater from pharmaceutical industry,experiments were carried out to find out the extracting effects of the system with different initial biomass concentration,initial BA concentration,equilibration time, temperature and solvent ratio(the volume of extractant to wastewater),and the extracting system using liquid paraffin(LP) as extractant was set up. The results showed that the effect of biomass concentration on BA extraction was not significant. The extraction efficiency of BA was up to 98%in 15min at 25℃ when the initial concentration of BA was 0.7g/100mL. The loading capability of LP was verified to be high and steady by multi-stage extraction,in which the extract phase(LP loaded with BA) was recycled and reused to extract the fresh wastewater. By utilizing multi-stage extraction with suitable solvent ratio,BA can be enriched in LP, significantly reducing the energy consumption of the after treatments. In the extract phase,BA can be effectively recovered from the loaded LP by using vacuum evaporation. After testing,the purity of BA in distillate was about 98%,and the water content was less than 0.1%. This concentrated BA can be reused in the process of extracting in pharmaceutical industry. The LP obtained from the vacuum evaporation was regenerated at the same time with very good reusability.
