Is there anyone familiar with the polypropylene novolen production equipment?

The technical information provided by foreign companies is the most comprehensive; why go out and look for it elsewhere? When will it be completed?

Is the poster from Ningbo or Fujian? Is something starting in Ningbo? Should that driving engineer from South Africa have arrived by now? I’m from Liaoning. I’m not sure what you’re looking for – do you want to learn more, or just have an initial conversation?

There are two reactors: one is used to produce homopolymers and random copolymers, while the other is used to produce impact-resistant copolymers as well as homopolymer products; the catalyst used is PTK4

Hello, I would like to explore the Novolen process together; there is a set of equipment for this process in China. The Novolen process uses two vertical gas-stirred tank reactors, with each reactor having a capacity of 250,000 tons per year. The Novolen process allows for flexible arrangement of the reactors, enabling the two reactors to be connected in series or in parallel as needed, thus offering high production flexibility. Homopolymers, random copolymers, and terpolymers can be produced using a single reactor ； Impact-resistant or block copolymers can be produced using tandem twin reactors ； Using parallel twin reactors can increase the production capacity of homopolymers by 70-100%. The gas-phase reactor used in the Novolen process is equipped with a twin-screw agitator, which enables uniform distribution of the catalyst among the monomers undergoing gas-phase polymerization. This helps to maintain a consistent titanium/aluminum/donor ratio in each polymer particle, thereby addressing the issue of poor uniform distribution between the gas and solid phases during gas-phase polymerization. The catalyst used is PTK4. The heat removal method in the polymerization reactor relies on the circulation of propylene gas. Liquid propylene is pumped into the reactor, where its vaporization helps absorb part of the heat generated during the polymerization reaction. The unreacted gaseous propylene is condensed using water to be turned back into a liquid state, after which it is pumped back into the reactor for use. Since the reaction heat of propylene polymerization is 2093.4 KJ/Kg, and the latent heat of vaporization of liquid propylene is 334.9 KJ/Kg, 6–7 tons of circulating gas are required to remove the polymerization heat from 1 ton of propylene. The Novolen process can produce a wide range of polypropylene resins, with melt flow indices MFR ranging from 0.1 to 100, an isotacticity level of 90–99%, and a tensile modulus that can reach up to 2400 Mpa.

Novolone has been in use at Yanshan Petrochemical and Yangzi Petrochemical for many years; one can ask colleagues at these companies for information

The polypropylene produced by Yangzi Petrochemical and Yanshan Petrochemical is made using the Innovene process (formerly BP-Amoco, now Ineos). There are several plants in China that use the Novolen process for polypropylene production: CNPC Jinxi Petrochemical with a capacity of 150 Kt/a, Formosa Plastics Ningbo with a capacity of 450 Kt/a, and Shenhua Ningmei with a capacity of 500 Kt/a (2 units). This post was last edited by northwest on 2008-5-24 at 11:49

Are there any that have been built and put into operation in the country?

I’ve learned it; thanks to everyone for sharing! ::)

Currently in China, they are Fuliang, Ningmei, Formosa Plastics, and Liaoning, I guess

Shenhua Ningmei should be using Dow Chemical’s “UNIPOL” Process

The Ningxia Coal plants use the NOVOLEN process, and all of these units are in operation; however, some may be shut down for economic reasons

I’ve looked up some information; novolen is a gas-phase polymerization process. I want to know whether the propylene feed is in gaseous or liquid form, and whether there are three phases – gas, liquid, and solid – inside the reactor during the polymerization process, or only two phases – gas and solid. The book states that a liquid feed is used, and the reaction temperature is controlled by the evaporation of liquid propylene; since this means there is a liquid phase inside the reactor, then why is it called gas-phase polymerization?

The liquefaction of propylene is conditional; it exists in a liquid state only when the appropriate temperature and pressure are reached. The liquid phase can be vaporized once it is injected into the reactor through the feed inlet. Therefore, it belongs to gas-phase polymerization. After normal operation in the reactor, a gas-solid two-phase state is present.

The fresh propylene feed line contains liquid propylene at around 25°C, while the reactor contains a gas phase at 80°C and 3.0 MPa; temperature control is primarily achieved through the circulation of propylene in liquid form. At the bottom of the reactor there is a feed distribution pipe (the main feed inlet); fresh propylene and recycled propylene enter the reactor primarily through this location. Other additives besides the main catalyst (silane, TEA, hydrogen, ethylene) are also injected here. Theoretically, fresh propylene maintains the reaction pressure balance, while the vaporized recycled propylene removes heat; approximately 6 tons of recycled propylene are needed to remove the heat generated by 1 ton of fresh propylene.

The reactor contains a gas-solid two-phase mixture. Before operation, the reactor’s temperature is raised to ensure that there is no liquid phase inside it. After restart, a dew point interlock protection is in place; if the reactor pressure exceeds the saturated vapor pressure corresponding to a certain temperature, this interlock will trigger an automatic shutdown