GPB
process is the technology for extraction of 1,3-Butadiene
which is widely used as one of raw materials for synthetic
rubber such as SBR, PBR, NBR etc. ABS resin
etc. from the C4 fraction produced in naphtha cracking.
| Boiling Point and Solubility in DMF >> |
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| Process Description >> |
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| Process Performance >> |
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| Process Flow >> |
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| Case Study >> |
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| Commercial Installation >> |
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| Summary >> |
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| Technology, Licensed Across the Global >> |
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Boiling
Point and Solubility in DMF| Component |
(°C) |
Vol/Vol/1atm |
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| Propane | -42 | 4.0 (25°C) | Less soluble from 1st extractive distillation section |
| Propylene | -47.7 | 8.2 (25°C) | |
| iso-Butane | -11.7 | 9.2 (20°C) | |
| Allene | -34.3 | 40.0 (20°C) | |
| n-Butane | -0.5 | 16.5 (20°C) | |
| iso-Butene | -6.9 | 28.0 (20°C) | |
| 1-Butene | -6.3 | 24.6 (20°C) | |
| t-2-Butene | +0.9 | 35.5 (20°C) | |
| c-2-Butene | +3.7 | 51 (20°C) |
| 1,3-Butadiene | -4.4 | 83.4 (20°C) |
| Methylacetylene | -23.2 | 85 (20°C) | More soluble from 2nd extractive distillation section |
| 1.2-Butadiene | +10.3 | 160 (20°C) | |
| Vinylacetylene | +5.1 | 350 (20°C) |
Process
DescriptionThe crude C4 and the DMF solvent are fed to 1st extractive distillation column where the C4 stream is separated into the C4 raffinate-1 from top and the bottom stream which contains Butadiene/acetylene in the DMF solvent. The Butadiene/acetylene rich solvent is fed to 2nd extractive distillation column where mainly vinylacetylene is removed. The top stream is sent to the Butadiene purification section where the remaining acetylene is removed and purified 1,3-Butadiene is produced using two distillation columns. The lean solvent from two strippers is cooled via heat recovery prior to being sent back to the extractors.
Process
PerformanceThe process is capable of operating on a wide range of feedstock. Two or four years continuous operation has been experienced by ZEON Corporation and most of the licensees applying proprietary fouling prevention technology. The typical product Butadiene quality is shown below.
| Product purity | More than 99.6 % | |
| Total acetylene | Less than 20 ppm |
Process
Flow
Case
Study
The table below shows the economics for 140,000 ton
per year of product Butadiene.
| Estimated ISBL Cost US$ (millions) | 28 | |
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| Utilities | ||
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Electricity (KWH/ton product Butadiene) | 100 |
| Steam (Ton/ton product Butadiene) | 1.8 | |
| Cooling water (Ton/ton product Butadiene) | 150 | |
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| Chemicals (US$/ton product Butadiene) | 3 | |
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| Recovery rate (%) | More than 98 | |
Commercial
InstallationGPB Process is the most popular and well-accepted BD extraction process and more than 49 plants have been operated in the world today.
SummaryThe improvement and innovations are still attempt for better economics. The ADVANCED CONTROL SYSTEM for the cost minimum operation was completed based on the computer aided operation system.
Technology, Licensed Across the GlobalZEON’s GPB process for butadiene extraction technology, developed through our exclusive technology, is licensed to 49 plants in 19 countries worldwide.
