Technobell Maleic Anhydride Conference 2018

PORTOROŽ, SLOVENIA – After the success of the first Maleic Anhydride conference held in 2016 Technobell decided to organize a second conference also this year. The 2nd Technobell’s conference & Operations Management Training in the Field of Maleic Anhydride Process took place in Portorož from September 18th to September 21st 2018. The event was attended by more than 30 professionals from 11 countries.

The conference was a unique opportunity to receive up-to-date information about the latest developments in the field of Maleic Anhydride production technologies, to learn how to optimize the production process and to establish contacts with the top professionals from the field.

Technobell's Maleic Anhydride conference

Technobell’s Chemical Technologies Department hosted a 3-day Maleic Anhydride Process Conference in Portorož, Slovenia, in September 2016. Over 30 professionals from 15 countries attended the event. Technobell presented its latest developments in the process optimization (Oxidation System, Solvent Recovery and Aqueous Recovery Systems) together with the advantages and mechanical features of its new Double Salt Zone Reactor.

Maleic Anhydride TMP dosing system

TMP dosing system – Extends catalyst life cycle

From Start-of-Run till End-of-Run Maleic Anhydride (MA) catalyst activity is continuously decreasing. To lengthen the life-cycle of catalyst Trimethyl-Phosphate (TMP) must be added to the feed. Important role of TMP is activation procedure of catalyst for achieving of full selectivity of catalyst.


General description of the system:

Selectivity/Activity Stabilizer (SAS) dosing system is placed into the reactor section and it is supplied as a package that contains stainless steel tank for TMP storage, dosing pump, control system, safety relief valve, and TMP drum pump with hose for safe and fast unloading of TMP from the drum into the tank. The dosing system is installed into a heated cabinet. A special atomizer/distributor is located at TMP / feed gas line connection point.

TMP is supplied by the TMP dosing pump from TMP tank and is then injected to feed-gas line through special atomizer/distributor. On TMP line a shut-off valve is installed to prevent feed-gas back flowing to TMP system. Dosing pump is equipped with capacity regulation and discharge pressure protection.


Main Advantages of TMP dosing system:

  • constant flow and perfect distribution of TMP in reactor;
  • better control of the catalyst operation – stabile catalyst hot-spot;
  • higher yields and plant productivity;
  • longer catalyst lifecycle;
  • system is also capable of dosing Triethyl-Phosphate (TEP).
Double Salt Zone Reactor

Technobell has, based on its improved salt flow circulation, as well as the performance cooling system, designed its own Maleic Anhydride (MA) reactor that is capable of operating up to 2,2 mol% n-butane concentration in the feed gas. Because of its Double Salt Zone Reactor system, a more homogeneous salt pattern, safe Reactor operation and considerable savings of raw material (n-butane) and energy consumption have been achieved.

Now Technobell’s Reactors have reached the ‘State of the Art’ level as far as the internal and external systems for salt circulation is concerned, with the assurance of operating in the safest possible condition, at high feeding loads, with high level manufacturing quality, equipment reliability and extended reactor lifespan.


Technobell’s Double Salt Zone Reactor expected performance:

n-C4 concentration in feed gasmol %up to 2,2
Conversionmol %85-90
Selectivitymol %67-72
Reaction Yieldwt. %101-104
Salt temperature°C400-445
Catalyst lifecycleMonths54-66

Note: Both Selectivity and Reaction Yield are based on pure n-butane (100% purity).


Technobell’s Double Salt Zone Reactor main characteristics:

  • Perfect gas and salt flow distribution;
  • Bottom salt zone with lower salt temperature;
  • Upper salt zone with higher salt temperature;
  • Lower hot-spot, two catalyst hot-spot peaks;
  • Higher conversion (up to 90 mol%) and high selectivity;
  • Expected Cum. Reaction yield (MA): up to 104 wt%!