Mitsubishi Rayon Engineering (MRE) has extensive experience in the recovery of solvents, undertaken in acrylic fiber plant operations for its parent company Mitsubishi Rayon. MRE hopes to fulfil your solvent-recovery needs and contribute to the realization of an increasingly recycling-oriented society. Having recorded the best performance in Japan with our DMF/DMAC recovery system, we are making utmost efforts to conserve natural resources through the recovery of resources. Business field Solvent Synthetic fiber DMF Acrylnitril Synthetic leather DMAC Amino acid Electronic materials MEK Acetic acid Resin MIBK Formic acid Agricultural chemicals Methylene chloride IQ Coatings Acetone   Pharmaceuticals Methanol   Inorganic chemicals Ethanol   Organic chemicals Toluene   Overview of our DMF (Dimethyl Formamide) recovery system   Characteristics High recovery rate (99% or higher) Recovery of high-purity DMF Energy efficient Compact Reduces the environmental burden posed by discharged effluent Condensation is possible in pre-treatment stages (utilizing membranes) Long-term, continuous and stable operation Easy maintenance More than 40 orders received worldwide   Operation Flow Solids removal process -- using unique MRE-designed pan dryer Dehydration process -- MRE's Two-Column system Formic acid removal process -- Formic acid density reduced to less than 50ppm Formic acid decomposition process -- Formic acid decomposer   Estimated cost-savings afforded by our solvent recovery system (assuming: continuous operation at 2 tons per hour of DMF 10% solution) Construction costs: ¥250 million Operating costs: ¥104 million/year (including utilities and labor costs) Value of recovered DMF: ¥235 million/year   Period required for recovery of the initial costs: 250/(235-104)= 1.9 years   Facilities equipped with MRE's DMF/DMAC Recovery System   Company A Company B Company C   DMF quality standards and quality of recovered DMF   Item Standard Recovered material quality JIS Class Mitsubishi Rayon Design values Actual results Specific gravity (25 centigrade) 0.949 ~ 0.954 (25 centigrade) 0.9435 ~ 0.9450   (0.944) Refractive index (n 20D) 1.428 ~ 1.432 (25 centigrade) 1.4275 ~ 1.4290   (1.429) Reservoir (vol%) (151 ~ 154 centigrade) 95 or greater (151 ~ 155 centigrade) 98 or greater   99 or greater Water solution Within limits       Ethanol solution Within limits       Water content(%) Less than 0.2 Less than 0.05 Less than 0.02 0.005 ~ 0.02 Non-volatile content (%) Less than 0.01       Free acid (%) Less than 0.003   Less than 0.005 0.0004 ~ 0.0012 Hue (APHA)   Less than 10   Less than 15 (determined at 15) Total alkali (%)   Less than 0.005 Less than 0.005 0.0003 ~ 0.0014 ph (20% water solution)   6.5 ~ 8.5 6.5 ~ 9.0 6.5 ~ 9.0 Iron (ppm)   Less than 0.03 Less than 0.05 Less than 0.025 Relative conductivity   Less than 3.0   0.2 ~ 2.2   || Back to top ||