Executive works of Iran Islam Abad Gharb GTPP Petrochemical Complex IGIPC officially started
07 ,February, 2021
The executive works of the project to construct Iran Islam Abad Gharb Natural gas-to-polypropylene (GTPP) complex was officially started
The capacity is 960,000 Tons per year and final product is Polypropylene
IGIPC(Islamabad Gharb Industrials Petrochemical Co.)
The natural gas feedstock containing various impurities must be de-sulphurized before being further processed, since Sulphur and its compounds are harmful to the reforming and methanol synthesis catalyst.
The feedstock flow will be automatically cut-down if its Sulphur content appears to be beyond the acceptable limit.
The preheated feedstock is reformed with steam over nickel catalyst to produce a gas mixture mainly consisting of hydrogen, carbon monoxide and carbon dioxide and a little methane. The reformed gas, after cooling and condensation of residual process steam, is used as synthesis gas for methanol production.
The synthesis gas is compressed to the methanol loop pressure and after being mixed with recycle gas, preheated up to the required reaction temperature. The gas is partly converted to methanol by means of a copper based catalyst. After being cooled down, the condensed raw methanol is separated from unconverted recycle gas.
Raw methanol contains dissolved gases and small quantities of undesired but unavoidable by-products. Therefore it has to be purified by means of the distillation unit.
PVM Unit (Propylene via Methanol)
This process description follows and describes the flow of reaction and product separation and purification, thus giving an overview of the PVM process. The PVM plant design comprises of six Process Units, which are Reaction Section , Reactor Regeneration , Gas Separation , Hydrocarbon Compressing and Drying , Purification .
In addition, Feed and Storage , Utilities system and Flare System .
The methanol feed for the Methanol to Propylene plant is supplied from Battery Limit. The products of the PVM Unit are passing Battery Limit to storage in OSBL.
The PVM process is based on a fixed-bed adiabatic reactor system. In Reaction Section the feed methanol reacts to DME in the DME Reactor. The DME Reactor product is selectively converted to propylene in the presence of steam using a 6 stage PVM Reactor. Besides the main product propylene, by-products from the process are ethylene, a high-RON PVM-Gasoline and PVM-LPG. The PVM reaction operates at a slightly elevated pressure and at low temperatures .
Because of the low coking tendency of the catalyst, simple discontinuous in-situ catalyst regeneration by coke burning is sufficient. The gas used for regeneration is a mixture of nitrogen and air. The regeneration gas is provided by Unit Regeneration.
The process steam used in the PVM Reactor and the reaction water generated in the DME Reactor and the PVM Reactor is separated from the PVM Reactor product in the Pre Quench and Quench Columns of Unit Gas Separation. The process water is partially recycled as steam to the PVM Reactor. Recovered Methanol and DME from the Purification Unit and methanol contained in the excess process water are separated in the MeOH Recovery Column and recycled to the DME Reactor.
After separation of the water from the PVM Reactor product, the remaining hydrocarbon gas is sent to Unit Hydrocarbon Compressing. There the gas is pressurized and dried, so that it can be purified in columns using cooling water, propylene and ethylene as refrigerant for condensing the overhead.
In Unit Purification the different products are separated and purified in several separation columns. The compressed hydrocarbons are separated into the products propylene, PVM-LPG, PVM-Gasoline and hydrocarbon recycle streams, which are recycled to the PVM Reactor.
Tanks for storage of feed and products are combined in Unit Feed and Product Storage.
Steam import, generation and distribution on different pressure levels as well as condensate collection are assorted in Unit Steam & Condensate System. Thid includes demineralized water polishing (PU) and BFW drum with deaerator to produce BFW for HHP Steam Generation (PU).
The Unit Propylene Refrigerant System PU includes the propylene cycle to supply cooling medium at temperatures below the cooling water temperature.
In Unit nitrogen, Instrument air and Plant air system.
Two basins for collection of oily water and sanitary water are combined in Unit Waste Water System.
Company’s object : to establish commission and operate petrochemical products production project including methanol ,propylene and its derivate ;deal with marketing ,sale ,issuance of petrochemical products ,storage , import and export and conversion of all chemical and petrochemical products and their byproducts and derivate: deal with all production , industrial ,commercial ,technical and engineering activities directly or indirectly related to aforesaid operations while adhering to related rules and regulations .To realize its objectives and goals,
Company may launch following operations :establish different type of companies and (legal of civil)participation with other companies ;sale and purchase and domestic and foreign commercial transaction ;enjoy financial and credit facilities of bank and credit institution ;purchase and sell shares of production and service companies ; sell and purchase securities ; deal with service ,financial ,credit and commercial operations with regard to Company object ; obtain agency ,establish and grant agency in Iran and abroad ;deal with all operations directly or indirectly deemed beneficial or necessary for realization of company objectives or for handling the Company subject.