Optimal operation of different types of batch reactive distillation columns used for hydrolysis of methyl lactate to lactic acid

2011 ◽  
Vol 172 (1) ◽  
pp. 467-475 ◽  
Author(s):  
E.A. Edreder ◽  
I.M. Mujtaba ◽  
M. Emtir
Keyword(s):  
Lactic Acid ◽  
Reactive Distillation ◽  
Optimal Operation ◽  
Distillation Columns ◽  
Methyl Lactate ◽  
Different Types ◽  
Hydrolysis Of

Design and control of reactive distillation for hydrolysis of methyl lactate

2011 ◽  
Vol 89 (11) ◽  
pp. 2199-2206 ◽  
Author(s):  
Liu Mo ◽  
Jiang Shao-Tong ◽  
Pan Li-Jun ◽  
Zheng Zhi ◽  
Luo Shui-Zhong
Keyword(s):  
Reactive Distillation ◽  
Methyl Lactate ◽  
And Control ◽  
Hydrolysis Of

scholarly journals Novel Hybrid Reactive Distillation with Extraction and Distillation Processes for Furfural Production from an Actual Xylose Solution

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 1152
Author(s):  
Le Cao Nhien ◽  
Nguyen Van Duc Long ◽  
Moonyong Lee
Keyword(s):  
Production Process ◽  
Energy Use ◽  
Reactive Distillation ◽  
Process Efficiency ◽  
Continuous Stirred Tank Reactor ◽  
Butyl Chloride ◽  
Distillation Columns ◽  
Reactive Liquid ◽  
Pharmaceutical Industries ◽  
Furfural Production

Furfural is only derived from lignocellulosic biomass and is an important chemical used in the plastics, agrochemical, and pharmaceutical industries. The existing industrial furfural production process, involving reaction and purification steps, suffers from a low yield and intensive energy use. Hence, major improvements are needed to sustainably upgrade the furfural production process. In this study, the conventional furfural process based on a continuous stirred tank reactor and distillation columns was designed and optimized from an actual aqueous xylose solution via a biomass pretreatment step. Subsequently, a reactive distillation (RD) and extraction/distillation (ED) configuration was proposed for the reaction and purification steps, respectively, to improve the process efficiency. RD can remove furfural instantly from the reactive liquid phase and can separate heavy components from the raw furfural stream, while the ED configuration with toluene and butyl chloride used as extracting solvents can effectively separate furfural from a dilute aqueous stream. The results showed that the hybrid RD-ED process using a butyl chloride solvent saves up to 51.8% and 57.4% of the total investment costs and total annual costs, respectively, compared to the conventional process. Furthermore, environmental impacts were evaluated and compared for all structural alternatives.

scholarly journals Multifunctional Biodegradable Vascular PLLA Scaffold with Improved X-ray Opacity, Anti-Inflammation, and Re-Endothelization

Polymers ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 1979
Author(s):  
Ho In Lee ◽  
Yun Heo ◽  
Seung-Woon Baek ◽  
Da-Seul Kim ◽  
Duck Hyun Song ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Inflammatory Responses ◽  
Neointimal Hyperplasia ◽  
Film Surface ◽  
High Mechanical Property ◽  
X Ray ◽  
Stent Restenosis ◽  
X Ray Computed ◽  
Hydrolysis Of

Poly(L-lactic acid) (PLLA) has been used as a biodegradable vascular scaffold (BVS) material due to high mechanical property, biodegradability, and biocompatibility. However, acidic byproducts from hydrolysis of PLLA reduce the pH after the surrounding implanted area and cause inflammatory responses. As a result, severe inflammation, thrombosis, and in-stent restenosis can occur after implantation by using BVS. Additionally, polymers such as PLLA could not find on X-ray computed tomography (CT) because of low radiopacity. To this end, here, we fabricated PLLA films as the surface of BVS and divided PLLA films into two coating layers. At the first layer, PLLA film was coated by 2,3,5-triiodobenzoic acid (TIBA) and magnesium hydroxide (MH) with poly(D,L-lactic acid) (PDLLA) for radiopaque and neutralization of acidic environment, respectively. The second layer of coated PLLA films is composed of polydopamine (PDA) and then cystamine (Cys) for the generation of nitric oxide (NO) release, which is needed for suppression of smooth muscle cells (SMCs) and proliferation of endothelial cells (ECs). The characterization of the film surface was conducted via various analyses. Through the surface modification of PLLA films, they have multifunctional abilities to overcome problems of BVS effectively such as X-ray penetrability, inflammation, thrombosis, and neointimal hyperplasia. These results suggest that the modification of biodegradable PLLA using TIBA, MH, PDA, and Cys will have important potential in implant applications.

Study on acid-hydrolysis of spent cells for lactic acid fermentation

2006 ◽  
Vol 28 (1) ◽  
pp. 87-91 ◽  
Author(s):  
Min-tian Gao ◽  
Makoto Hirata ◽  
Eiichi Toorisaka ◽  
Tadashi Hano
Keyword(s):  
Lactic Acid ◽  
Acid Hydrolysis ◽  
Lactic Acid Fermentation ◽  
Acid Fermentation ◽  
Hydrolysis Of

Investigation of changes in physical and mechanical parameters of biodegradable polymer films during composting

2021 ◽  
pp. 40-43
Author(s):  
Дмитрий Михайлович Мяленко
Keyword(s):  
Lactic Acid ◽  
Environmental Protection ◽  
Biodegradable Polymer ◽  
Polymeric Materials ◽  
Mechanical Parameters ◽  
Ecological Situation ◽  
Plant Materials ◽  
Foreign Countries ◽  
Hydrolysis Of ◽  
Aliphatic Biopolymer

Вопросы защиты окружающей среды и улучшения экологической обстановки приобретают глобальный характер. Количество производимых в России и зарубежных странах синтетических полимерных материалов постоянно увеличивается, что заставляет задуматься о подходах к разработке современных биоразлагаемых полимерных материалов из полностью возобновляемого растительного сырья. Один из таких материалов - это линейный алифатический биополимер, полученный путем гидролиза молочной кислоты: полилактид (PLA). В данной статье представлены результаты исследований способности к биоразложению полимерных материалов на основе PLA при их компостировании в течение 3 мес. The issues of environmental protection and improvement of the ecological situation are becoming global in nature. The number of synthetic polymeric materials produced from Russia and foreign countries is constantly increasing, which makes us think about approaches to the development of modern biodegradable polymeric materials from completely renewable plant materials. One such material is a linear aliphatic biopolymer made by hydrolysis of lactic acid: polylactide (PLA). This article presents the results of studies on the biodegradability of PLA-based polymeric materials when composted for 3 months.

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