Enhancement in Triethylene Glycol (TEG) Purity via Hydrocarbon Solvent Injection to a TEG + Water System in a Batch Distillation Column

2011 ◽  
Vol 25 (11) ◽  
pp. 5126-5137 ◽  
Author(s):  
Khadijeh Paymooni ◽  
Mohammad Reza Rahimpour ◽  
Sona Raeissi ◽  
Mohsen Abbasi ◽  
Mohammad Saviz Baktash
Keyword(s):  
Distillation Column ◽  
Water System ◽  
Triethylene Glycol ◽  
Batch Distillation ◽  
Solvent Injection ◽  
Hydrocarbon Solvent

Distilasi reaktif metanol-asam asetat-metil asetat-air

2018 ◽  
Vol 7 (2) ◽  
pp. 804
Author(s):  
Cheryl Raditya ◽  
Widya Wahyuni ◽  
Danu Ariono
Keyword(s):  
Acetic Acid ◽  
Methyl Acetate ◽  
Distillation Column ◽  
Reactive Distillation ◽  
Water System ◽  
Batch Distillation ◽  
Bottom Temperature ◽  
Separation Processes ◽  
Feed Composition ◽  
Separation Degree

In chemical industry, efficiency of the production unit becomes an important factor. Reaction and separation can be done simultaneously in reactive distillation column. This method is used in esterification of acetic acid with methanol to produce methyl acetate and water. The purpose of this research is to study the separation processes through distillation for reactive components by identifying feed   composition effects on degree of separation. This research is done by varying methanol and acetic acid in feed composition in batch distillation with total reflux condition.  The feed  compositions  used during this research  is 50%/50%,   75%/25%,  33%/67%  and  67%/33%-volume  methanol/acetic  acid.  Through this research, feed composition with 67%-volume methanol/33%-volume acetic acid is the best composition for  acetic acid-methanol-methyl acetate-water   system   in   reactive distillation. Feed composition affects top and bottom temperature of the column and distillate composition.  Top and bottom temperature of the column gets lower if there is lighter component in feed composition. But too many light components in feed composition will decrease separation degree in reactive distillation column because light component will be drawn to distillate. Key words: reactive distillation, esterification, methyl acetate AbstrakPenggunaan unit produksi yang efektif telah menjadi faktor yang sangat diperhatikan dalam dunia industri. Dalam industri berbasis teknik kimia, reaksi dan pemisahan dapat dilakukan bersamaan dalam satu alat, dengan distilasi reaktif. Metode ini digunakan dalam proses esterifikasi asam asetat dan metanal menghasilkan metil asetat dan air. Penelitian ini bertujuan untuk mempelajari proses pemisahan dengan cara distilasi untuk komponen­komponen yang bereaksi dengan mengidentifikasi pengaruh komposisi umpan dalam kolom distilasi. Percobaan dilakukan dengan memvariasikan komposisi umpan metanal dan asam asetat dalam sistem   distilasi batch dengan kondisi refluks total. Pada percobaan menggunakan empat variasi komposisi umpan, yaitu campuran 50% /50%, 75%/25%, 33%/67% dan 67%/33%-volume   metanol/asam asetat. Dari percobaan, diperoleh komposisi umpan yang paling tepat untuk sistem asam asetatmetanol-metil asetat-air dalam kolom distilasi reaktif adalah 67%/33%-volume metanol/asam asetat.  Komposisi umpan mempengaruhi temperatur bagian alas dan bagian bawah kolom serta komposisi distilat. Makin banyak komponen ringan dalam umpan, makin rendah temperatur bagian atas dan bagian bawah kolom. Akan tetapi, komposisi reaktan ringan yang terlalu banyak di dalam umpan akan menurunkan derajat pemisahan produk dalam kolom distilasi reaktif karena komponen ringan akan terbawa dalam produk distilat.Kata Kunci: distilasi reaktif, esterifikasi, metil asetat

scholarly journals Performance of Appended Wire Mesh Packing in Sieve Tray Distillation Column of Ethanol-Water System

2015 ◽  
Vol 9 (7) ◽  
pp. 148
Author(s):  
Fadlilatul Taufany ◽  
Nonot Soewarno ◽  
Melvina Eliana Sutanto ◽  
Indi Raisa Girsang
Keyword(s):  
Distillation Column ◽  
Water System ◽  
Interfacial Area ◽  
Wire Mesh ◽  
Water Mixture ◽  
Valve Tray ◽  
Sieve Tray ◽  
Distillation System ◽  
Preliminary Study ◽  
The Wire

For the separation process in liquid-liquid mixture such as ethanol-water mixture, a sieve tray distillation columnis an alternatif for affordable process and maintenance. However to date, this sieve tray system is still currentlyhaving a lower Murphee efficiency and smaller interfacial area, as compared to other tray system, that is, either abubble cap or valve tray. Therefore it is of important to optimize the performance of sieve tray distillation bymeans of adding the wire mesh packing on that tray, as being the aim of the present study. This study isconducted by using a batch sieve tray distillation system, where the wire mesh packing is added on the third traythat is calculated from the top of the column, to avoid flooding inside the column. Here the resulting fermentedmolasses of containing a 10% volume of ethanol is used as a mixture distillation feed. The height of the wiremesh packing being studied is varied as 5 cm, 3 cm, and 2 cm. Our results showed that the Murphee efficiencyobtained by the variation of the packing height of 5 cm, 3 cm, 2 cm and without packing were 73.5%, 66.27%,56.86%, and 46.7% respectively, and were increased by subsequent level of the packing height. Thecorresponding hydrodynamic properties of this appended packing sieve tray distillation by means of theinterfacial area were 11.88 cm2/cm3, 0.48 cm2/cm3, and 0.32 cm2/cm3, while its pressure drop measured from thewater manometer height were 38.33 cm H2O/m, 30 cm H2O/m, 10 cm H2O/m for the packing height of 5 cm, 3cm, 2 cm height, respectively. The increasing of the performance of appended packing sieve tray distillation bymeans of the Murphee efficiency is explained by the increasing of the interfacial area for vapour-liquid than thetray itself. This preliminary study is expected to be a pioneer study of strategy to increase the performance ofconventional sieve tray distillation that is known as a kind of affordable distillation process.

scholarly journals Dynamic-accumulative operation policy of continuous distillation for the purification of anisole

2016 ◽  
Vol 18 (1) ◽  
pp. 33-39
Author(s):  
Zhibo Wang ◽  
Shuairong Li ◽  
Caijiao Wang ◽  
Xianghai Guo ◽  
Peng Bai
Keyword(s):  
Flow Rate ◽  
Rate Control ◽  
Distillation Column ◽  
Operation Mode ◽  
Pilot Scale ◽  
Batch Distillation ◽  
Computer Codes ◽  
Great Sense ◽  
Flow Rate Control ◽  
Continuous Distillation

Abstract In the B10 isotope enrichment industry, the purification of anisole mixture makes great sense. A dynamic-accumulative operation policy of continuous distillation (DACD) with repeated filling and dumping of the still is proposed for the separation of trace heavy impurities in the recycled anisole. To simulate and optimize the purification process of anisole, a mathematical model of DACD is derived, and the computer codes are developed in the MATLAB environment. Moreover, the experiment is performed in a pilot-scale distillation column. The results show that the experimental date agrees well with simulation results. DACD could solve the difficulty of flow rate control when the bottom flow rate is very small in continuous distillation. The size of the still in this operation mode is also smaller than that in batch distillation. And the yield of anisole is raised to 99.91%. In a word, DACD is especially suitable for separating trace heavy impurities from the recycled anisole.

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