High concentration – High pressure feed to reactor block.
Our technology nowadays allows operating with inlet pressures to reactor of 3 bar(a). This has enormous advantages compared to low and medium pressures operating systems. The n-Butane concentration can reach 2 mol% in feed stream. This data is MUCH HIGHER compared to low pressure systems. As a consequence our 20.000 tube reactor can produce almost 25.000 tons of MAn/ year.
High percentage of condensed crude MAn in condensing section.
As a consequence of high inlet pressure, but not only, the percentage of condensed MAn in condensing section COULD REACH 55 % of MAn contained in reactor off-gases. This is an important advantage compared to common systems, when the percentage of efficiency in this section is usually 45 % and sometimes can reach 50 % of MAn contained in the reactor off-gases. With this advantage the heat consumption in the recovery systems has been decreased with 12-15% compared with elder aqueous technologies.
Cleaning of Partial Condenser without any shutdown requirement
Careful and inventive process design allows Technobell to avoid quick plugging of the Partial Condenser. The Condenser can be operated continuously for min. 10 days then washed out during a few hours WITHOUT shutdown of the unit. After the cleaning procedure in (without any maintenance cost) the Condenser can be switched back and used for another min. 10 days. Using our own procedures the Condenser can be used continuously during the catalyst life-cycle.
Technology allows the use of any suitable – commercially available oxidation catalyst.
Technobell is not binding any client to use recommended catalyst. This can be chosen from the market by the client.
Basically batch or semi continuous distillation with use of xylene as dehydration solvent is proposed.
Technobell is in original design proposing the batch distillation unit with xylene as a solvent in the azeotropic dehydration phase. This reliable, well proven and simple refining method allows obtaining very good quality of pure product with low solvent losses. Generally both Maleic Acid dehydration and product refining can be solved in one common dehydrator/refiner column. Distribution of these process steps is recommended in case of expansion an old unit (higher capacity demand) or capacity requirement over 20,000 MTPA of MAn.
Energy, Utilities and Environment care
Technobell applies a three level steam system:
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High pressure steam (can be exported or used for electric energy production);
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Medium pressure steam (can be exported or used for electric energy production);
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Low pressure steam level.
The environment is protected with two sub systems:
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