Lummus Novolen Technology GmbH (Novolen), a part of CB&I, licenses the Novolen® gas-phase polypropylene process worldwide on the basis of Ziegler-Natta and metallocene catalysts for the production of a full range of polypropylene resins. This reliable and versatile process produces products meeting the requirements of the most demanding applications, while maintaining a strong focus on health, safety and environmental issues. The Novolen process features low total installed costs (TIC) and is very competitive in cash production costs.

CB&I’s on-purpose technologies for the production of polymer grade propylene, such as CATOFIN® dehydrogenation and Olefins Conversions Technology (OCT) allows licensors all over the world to benefit from the synergies provided when combining those in-house technologies with Novolen’s polypropylene technology.

Performance Characteristics

The Novolen process utilizes one or two identical vertical gas-phase stirred bed reactors. Homopolymers and random copolymers can be manufactured either in a single reactor or in a reactor cascade with two reactors, depending on the required capacity and product range. Alternatively, two reactors can be operated in parallel to achieve higher capacities for a single train plant and to produce bimodal resins. A cascade reactor configuration is required for the production of impact copolymers, whereas in the first reactor a propylene homopolymer (or random copolymer) matrix is polymerized and in the second reactor the ethylene-propylene rubber (EPR) is produced. Independent from the configuration chosen, all reactors are identical in design, size and material.

Our advanced VRCTM technology allows for choosing between a parallel and cascade reactor configuration without any downtime. This concept provides you with ultimate flexibility.

The polypropylene product portfolio covers a wide range of properties:

Melt flow rate (MFR)

0.1 – 3,000 g/10 min.


90 – 99.5 %

Tensile modulus

300 – 2,400 MPa

Tensile yield stress

10 – 40 MPa

Impact strength
(reactor blends)

No break at –30 °C

(1mm disc)

Up to 93 % for Ziegler-Natta polypropylene.
Up to 96 % for metallocene polypropylene

Melting temperature

125 – 165 °C

Simplified Novolen Process Schemes

Parallel configuration  (homo, random)

Cascade configuration  (homo, random, impact)


Use the links below to explore the Novolen process.