Hom polyethylene PE ntau lawm tshuab

Hauv kev tsim khoom ntawm txhaj tshuaj molding ntu, nws yog inevitable siv yas raw khoom. Hnub no peb yuav piav qhia txog cov txheej txheem ntau lawm ntawm pe, lub ntiaj teb tseem ceeb 11 hom polyethylene PE ntau lawm tshuab

Tam sim no, muaj ntau lub tuam txhab nrog polyethylene technology hauv ntiaj teb no, nrog rau 7 tuam txhab uas muag nrog LDPE technology, 10 tuam txhab uas muag nrog LDPE thiab puv-density technology, thiab 12 tuam txhab uas muag nrog HDPE technology. Los ntawm txoj kev xav ntawm kev tsim kho technology, Kev kub siab ntau lawm ntawm LDPE yog txoj kev paub tab tshaj plaws hauv kev tsim cov PE cob. Ob txoj kev kettle thiab txoj kev tubular tau matured. Tam sim no, ob lub tshuab tsim khoom siv tau ua ke. Cov teb chaws tsim kho feem ntau siv cov txheej txheem tubular ntau lawm. Ntxiv thiab, Cov tuam txhab txawv teb chaws feem ntau siv cov khoom siv hluav taws xob tsawg-kub siab ua haujlwm los pib cov txheej txheem polymerization, uas tuaj yeem txo qhov kub thiab txias. Kev kub siab ntau lawm ntawm LDPE yuav tsim nyob rau hauv cov kev taw qhia ntawm loj-scale thiab tubular ntau lawm. Kev tsim hluav taws xob tsawg ntawm HDPE thiab LLDPE feem ntau yog siv titanium thiab complex catalysts. Teb chaws Europe thiab Nyiv feem ntau siv Ziegler-type titanium catalysts, thaum lub tebchaws United States feem ntau siv complex catalysts. Tam sim no, muaj 11 hom polyethylene ntau lawm technologies uas yog siv nyob rau hauv lub ntiaj teb no. Cov lus qhia luv luv yog raws li hauv qab no:
(1) Basel tuam txhab roj theem txheej txheem Spherilene

Kev tsim tawm ntawm PE linear tuaj yeem ua los ntawm PE tsawg heev (ULDPE) rau LLDPE, zoo li HDPE. Xaiv

Ziegler-Natta hom titanium-based catalyst thiab Spherilene roj theem txheej txheem yog siv. Nyob rau hauv lub xub ntiag ntawm lub teeb inert hydrocarbons, cov catalyst thiab pub yog pre-polymerized nyob rau hauv tej ua ntej, thiab bulk polymerization tshwm sim nyob rau hauv me me. Lub slurry nkag mus rau thawj theem roj reactor, siv lub circulating gas voj txias kom dissipate tshav kub, thiab tom qab ntawd nkag mus rau ob theem roj reactors. Qhov ntom ntawm cov khoom tsim tawm yog los ntawm ULDPE (tsawg dua 900kg / m3) rau HDPE (loj dua 960 kg/m3), thiab melt flow rate (MFR) thaj tsam ntawm 0.01 rau 100. Vim yog siv ob theem roj reactors, nws tuaj yeem tsim bimodal thiab tshwj xeeb polymers. Tej yam. Txij li cov txheej txheem Spheri Lene tau qhia rau kev ua lag luam hauv 1992, tam sim no nws muaj peev xwm ntau lawm 1.8 lab tons ib xyoos twg. Rau ntau lawm units (1 nyob rau hauv lub tebchaws United States, 2 hauv South Kauslim, 2 hauv Brazil, thiab 1 hauv Is Nrias teb) tau muab tso rau hauv kev ua haujlwm, thiab lwm ob (1 txhua qhov hauv Is Nrias teb thiab Iran) nyob rau hauv kev tsim kho. Lub peev xwm ntawm ib leeg tuaj yeem ncav cuag 100,000 tons ib unit. Ib 300,000 tons ib xyoos twg. Tam sim no, Tuam Tshoj tsis muaj chaw tsim khoom rau hom tshuab no.
(2) Borealis Bastar Txheej txheem

Beixing PE txheej txheem tuaj yeem tsim bimodal thiab unimodal LLDPE, MDPE (medium ntom PE) thiab HDPE. siv

Series voj, gas theem qis siab reactor. Qhov ceev ntawm PE yog 918-970kg / m3, thiab lub melt index yog 0.1-100. Txais Z-N catalyst lossis Ssc (ib qhov chaw nquag) catalyst.

Cov catalyst thiab propane diluent yog tov rau hauv lub compact pre-polymerization reactor, thiab co-catalyst,

Ethylene, comonomer thiab hydrogen. Lub pre-polymerized slurry nkag mus rau lub thib ob loj slurry voj reactor thiab ua hauj lwm nyob rau hauv supercritical tej yam kev mob (75-100C, 5. 5-6.5 MPa). tuaj yeem tsim cov khoom lag luam bimodal. Lub flashed polymer yog txuas ntxiv mus rau fluidized txaj roj theem reactor yam tsis ntxiv cov catalysts tshiab, thiab homopolymer tuaj yeem tau txais. Gas theem cov tshuaj tiv thaiv tej yam kev mob yog: 75-100C, 2. 0MPa. Thawj txheej ntawm cov cuab yeej siv tau muab tso rau hauv kev ua haujlwm hauv Finland hauv 1995, thiab ob kab ntau lawm (450,000 tons / xyoo bimodal khoom) ua nyob rau hauv Abu Dhabi tau muab tso rau hauv kev ua haujlwm nyob rau hauv lub thib ob ib nrab ntawm 2001. Qhov thib tsib txheej ntawm 250,000 tons/xyoo (thib ob txheej ntawm bimodal) kuj tau tsim nyob rau hauv Tuam Tshoj Shanghai Petrochemical Company, ua Tuam Tshoj tus loj tshaj plaws PE ntaus ntawv. Qhov siab tshaj plaws tsim peev xwm ntawm ib kab ntawm cov txheej txheem no tuaj yeem ncav cuag 300,000 tons/xyoo.
(3) BP's gas theem Innovene txheej txheem

Nws tuaj yeem tsim cov khoom LLDPE thiab HDPE, siv Z-N titanium-raws li, chromium-based lossis metallocene catalysts. Chrome

Tus neeg sawv cev tshuaj tuaj yeem tsim cov khoom lag luam nrog qhov dav molecular hnyav faib, thiab Ziegler-Natta (Z-N) catalyst tuaj yeem tsim cov khoom nrog nqaim molecular hnyav faib. Cov kev ua haujlwm ntawm lub txaj reactor tau so, ntawm 75-100C thiab 2.0MPa. Butene los yog hexene tuaj yeem siv los ua comonomer. 30 cov kab ntau lawm tau muab tso rau hauv kev ua haujlwm, tsim los yog kev tsim kho. Lub peev xwm yog nyob ntawm 50,000 rau 350,000 tons ib xyoos twg.

Technip koom tes nrog BP hauv Tebchaws Europe, lub qub Soviet Union, South America, Tuam Tshoj thiab Malaysia
Txhawb BP's Innovene txheej txheem los tsim polyethylene. BP's Innovene PE muaj peev xwm tam sim no tau dhau lawm 8 lab tons ib xyoos twg, suav nrog PE cov khoom siv hauv Bandar Iman hauv Iran, Grangermus hauv Scotland, Peacock hauv Indonesia, thiab Keltih hauv Malaysia. Qhov thib ob nthuav dav ntawm LLDPE / HDPE cog ntawm Tuam Tshoj lub Dushanzi Petrochemical Company kuj tau txais cov txheej txheem Innovene, nce los ntawm 120,000 tons/xyoo rau 200,000 tons/xyoo. SECCO's new 600,000 tons ntawm polyethylene yuav siv cov tshuab no.
(4) ExxonMobil's tubular thiab kettle tshuaj tiv thaiv txheej txheem

High-pressure dawb radical txheej txheem yog siv los tsim LDPE homopolymer thiab EVA (ethylene vinyl acetate) copolymer.

Loj-scale tubular reactors (muaj peev xwm ntawm 130 rau 350,000 tons/xyoo) thiab stirred tank reactors (muaj peev xwm txog 100,000 tons/xyoo) siv. Kev khiav hauj lwm siab ntawm tubular reactor yog siab li 300MPa, thiab lub tank reactor qis dua 200MPa. The advantage of the high-pressure process is to shorten the residence time, and the same reactor can be switched from producing homopolymers to copolymers. The density of homopolymer polymer is 912-935 kg/m3, thiab lub melt index yog 0.2-150. The vinyl acetate content can be as high as 30%. The material consumption and energy consumption per ton of polymer production are: 1.008 tons of ethylene, 800kwh of electricity, 0.35t of steam, and 5m3 of nitrogen. 23 sets of high-pressure process reactors have been put into operation, with a production capacity of 1.7 lab tons ib xyoos twg. Production of homopolymers and various copolymers. Tam sim no, Yanshan’s newly built 200,000-ton/year LDPE plant adopts the company’s tube method technology.
（5) Mitsui Chemicals low-pressure slurry Cx process

It can produce HDPE and MDPE, using the low-pressure slurry method CX process. Can produce bimodal molecular weight distribution

The product. Ethylene, hydrogen, comonomer and ultra-high activity catalyst enter the reactor, and polymerization reaction occurs in the slurry state. The polymer property automatic control system can effectively control the product quality, and the ultra-high activity catalyst does not need to be removed from the product. 90% of the solvent separated from the slurry can be directly recycled to the reactor without any treatment. It can produce products with narrow or wide molecular weight distribution with a density of 930-970 kg/m3 and a melt index of 0.01-50. The material consumption and energy consumption per ton of product produced are: 1010 kg of ethylene and comonomers, 305 kWh of electricity, 340 kg of steam, 190 tons of cooling water, thiab 30 m3 of nitrogen. 35 production lines have been put into operation or under construction, with a total capacity of 3.6 lab tons ib xyoos twg. Tam sim no, domestic enterprises using this technology mainly include the 220,000-ton plant in Daqing, the 140,000-ton plant in Yangtze and Yanshan, and the 70,000-ton plant in Lanzhou.
(6) Chevron-Philips double loop reactor LPE process

Phillips Petroleum Company LPE process is used to produce linear polyethylene (LPE). Highly active catalyst

The chemical agent is polymerized in the loop reactor and the isobutane slurry. Product melt index and molecular weight distribution can be adjusted and controlled by catalyst, operating conditions and hydrogen. The comonomer can be butene-1, hexene-1, octene-1 and the like. The high activity catalyst makes it unnecessary to remove the catalyst, and no paraffin or other by-products are formed during polymerization, which greatly reduces the environmental pollution. Ethylene, isobutane, comonomer and catalyst continuously enter the loop reactor and react at a temperature lower than 100C and about 4.0 MPa, and the residence time is about 1 hour. The single-pass conversion rate of ethylene exceeds 97%. The material consumption and energy consumption per ton of product produced are: 1.007 tons of ethylene, US$2-10 for catalysts and chemicals (for different products), 350 kWh of electricity, 0.25 ton of steam, 185 ton of cooling water, thiab 30 m3 of nitrogen. 82 production lines have been put into operation and construction, accounting rau 34% of the world’s PE capacity. The 135,000-ton plant of Shanghai Jinfei Company uses this technology. Maoming’s newly built 350,000-ton/year new device may also adopt this technology.
(7) Univation technology company low pressure gas phase Unipol process

LLDPE-HDPE is produced by the low-pressure, air-pressure Unipol PE process. Using slurry catalyst and gas

Phase, fluidized bed reactor. With conventional and metallocene catalysts, no catalyst removal step is required. Investment and operating costs are lower, and there is less pollution to the environment. Ethylene, comonomer and catalyst enter the fluidized bed reactor, the operating conditions are about 100C and 2.5MPa. The product density is 915-970kg/m3, thiab lub melt index yog 0.1-200. According to the type of catalyst, narrow or broad molecular weight distribution can be adjusted. 89 production lines have been put into operation or construction. The single line capacity can be 410,000 rau 450,000 tons ib xyoos twg. Tam sim no, there are many domestic devices using this technology, mainly Maoming, Jihua, Yangtze, Tianjin, Zhongyuan, Guangzhou, Daqing, Qilu, lwm yam.

(8) Stamicarbon 4a COMPACT IZ This process uses advanced Z-N catalysts and uses COMPACT Solution technology to produce a density of

900-970kg/m3 of PE. A stirred tank reactor is used, and the polymerization temperature is 200C. Hydrogen is used to control the molecular weight of the polymer. No catalyst removal step is required. The material consumption and energy consumption per ton of product are: ethylene and comonomer 1.016t, electricity 500kwh, steam 400kg, cooling water 230m3, low pressure steam (output) 330kg. There are 5 sets of devices in operation, with a total capacity of 650,000 tons/ year.
(9) Basel Polyolefin Company Hostalen Process

The hostalen process of stirred tank is used to produce HDPE. Use two reactors in parallel or series

Slurry polymerization. The material consumption and energy consumption per ton of product produced are: 1.015 t of ethylene and comonomers, 400 kg of steam, 350 kwh of electricity, thiab 165 m3 of cooling water. There are 31 production lines in operation or under design, with a production capacity of nearly 3.4 lab tons ib xyoos twg. Tam sim no, the domestic device adopting this technology is Liaohua Company, with a production capacity of only 40,000 tons. The current single-line maximum production capacity of this technology can reach 350,000 tons/xyoo, and it can produce almost all products including Bifeng, among which its products such as film, hollow and pipe have a certain reputation in the world.