CN1332179A - Material pipe jam preventing method in production of polypropylene block copolymer - Google Patents
Material pipe jam preventing method in production of polypropylene block copolymer Download PDFInfo
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- CN1332179A CN1332179A CN 01113756 CN01113756A CN1332179A CN 1332179 A CN1332179 A CN 1332179A CN 01113756 CN01113756 CN 01113756 CN 01113756 A CN01113756 A CN 01113756A CN 1332179 A CN1332179 A CN 1332179A
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- surperficial
- deactivator
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Abstract
The material pipe jam preventing method includes the steps of: increasing one low purity nitrogen feeding pipe and one surface deactivating agent injecting pipe from the powder conveying blower outlet to the powder material tank of the third polymerizing reactor; filling the pipeline with low purity nitrogen and surface deactivating agent before ethylene is added into the fourth polymerization reactor continuously; and adding ethylene into the fourth polymerizing reactor to produce ethylene-propylene block copolymer. The method can prevent jam for long time production stably.
Description
One, technical field
The present invention relates to polyethylene-propylene-based block copolymer production technique.
Two, background technology
The present invention is the improvement of Mitsui oiling company polypropylene production equipment.The technology of Mitsui oiling company adopts HYPOL technology, and this process using high-effective carrier catalyst has been got rid of deliming, taken off random thing technology.Its device is combined by 1, No. 2 two liquid-phase polymerization still and 3, No. 4 two gas phase polymerization stills.This device is original design can produce homopolymer polypropylene, random copolymers and the segmented copolymer with premium properties.Because segmented copolymer is with its higher impact strength, medium flowability is widely used in work box, Turnover Box, blow-molded article etc., and market outlook are wide.But produce the technical requirements height of segmented copolymer.
Segmented copolymer is to add comonomer ethene at No. 4 polymerization reaction kettles when producing, because ethene adds and generates ethylene-propylene rubber(EPR) and make the powder mobile variation that is clamminess, easily cause bridge formation, or blanking is not smooth, influences stably manufactured.For this reason,, use wherein micro-oxygen to kill the catalyst active center of powder surface, reduce the generation of powder surface second third glue, improve the flowability of powder to the nitrogen (LPN) of No. 4 polymerization reaction kettle adding low-purity.
But No. 3 polymerization reaction kettle blanking systems very easily stop up in process of production, cause producing normally carrying out, and have a strong impact on the expansion of segmented copolymer output.
Three, summary of the invention
Through discovering of the inventor, easily to take place to stop up be because No. 4 polymerization reaction kettles add comonomer ethene in producing for No. 3 polymerization reaction kettle blanking systems in the polypropylene block copolymer production, and No. 3 polymerization reaction kettle powder conveying fans link to each other with No. 4 polymerization reaction kettles, ethene in No. 4 polymerization reaction kettles will be along with carrying gas enter the polymerization reaction kettle blanking system No. 3 by equilibration tube, in blanking system, continue reaction with propylene, generate second third glue and cause powder to be clamminess, the powder flowbility variation finally causes normally blanking.
At above reason, technical scheme of the present invention is as follows:
A kind of method that prevents that the blanking pipeline stops up in the polypropylene block copolymer production, it comprises the following steps:
A. as shown in Figure 1, the pipeline that is exported to the powder blanking tank 3 of No. 3 polymerization reaction kettles 1 from No. 3 polymerization reaction kettle 1 powder conveying fans 7 increases a low-purity nitrogen introduction pipe line 5, and surperficial deactivator injects pipeline 6,
B.4 before number polymerization reaction kettle 8 adds ethene, inject pipeline 6 adding lower purified nitrogen and surperficial deactivators from lower purified nitrogen introduction pipe line 5 and surperficial deactivator earlier, pipeline system is full of lower purified nitrogen and surperficial deactivator before making ethylene-propylene copolymer, and continues to add lower purified nitrogen and surperficial deactivator
C. in No. 4 polymerization reaction kettles 8, add ethene, the production Ethylene-Propylene Block Copolymer.
In the method for the invention described above, surperficial deactivator is Atmer163, and when the output of ethylene-propylene copolymer is 9-13 ton/time, the add-on of Armer163 is 7-15 liter/time.
In the method for the invention described above, the content of oxygen is 5000-6000ppm in the lower purified nitrogen, and when the output of ethylene-propylene copolymer is 9-13 ton/time, the add-on of low-purity nitrogen is 6-13Nm
3/ time.
After adopting method of the present invention, No. 4 polymerization reaction kettle 8 control stabilization, ethylene content control is steady, and No. 3 polymerization reaction kettle 1 blankings are normal, do not find latch up phenomenon, realized long-period stable operation, and quality product also is guaranteed.
Four, description of drawings
Fig. 1 is No. 3 polymerization reaction kettles and No. 4 polymerization reaction kettle part pipeline schematic flow sheets in the polypropylene production equipment, and wherein 1 is No. 3 reactors; 2,3 be respectively the powder blanking tank; 4 are the blanking rotary valve; 5 are newly-increased lower purified nitrogen adding pipeline; 6 are newly-increased surperficial deactivator Atmer163 injection pipeline; 7 is No. 3 polymerization reaction kettle powder conveying fans; 8 is No. 4 polymerization reaction kettles; 9 is No. 4 polymerization reaction kettle circulation gas blower fans; 10 is No. 4 polymerization reaction kettle interchanger; 11 is the ethylene feed pipeline.
Five, embodiment
Embodiment 1:
As shown in Figure 1, be exported on the circuit of No. 3 polymerization reaction kettle powder blanking tanks 3, increase low-purity nitrogen introduction pipe line 5 and surperficial deactivator Atmer163 and inject pipeline 6, Atmer163 can be injected by surge pump from No. 3 polymerization reaction kettle powder conveying fans 7.Prepare low-purity nitrogen before changing the line of production, its oxygen concn is 5600ppm, and add-on was respectively 10Nm to throwing ethene to system's adding lower purified nitrogen and Atmer163 (Britain's product) in preceding 5 hours
3/ hr, 12L/hr, make total system all be full of lower purified nitrogen and Atmer163, the segmented copolymers such as J340, J440, J540, J640, J740 of having thrown ethylene production have then been obtained good effect, and whole process of production is steady, the line clogging phenomenon does not appear, hourly output reaches 12 tons, and quality product is superior, wherein the performance of J340 such as following table, from table, can find out that every intensity index of Yang Zi J340 is all higher.
Embodiment 2: scrap build such as embodiment 1
Prepare low-purity nitrogen earlier before the segmented copolymer J340 that changes the line of production, its oxygen concn is 6000ppm, and add-on was respectively 8Nm to throwing ethene to system's adding low-purity nitrogen and surperficial deactivator Atmer163 in preceding 3 hours
3/ hr and 8L/hr make total system be full of lower purified nitrogen and Atmer163, drop into ethylene production J340 Ethylene-Propylene Block Copolymer then, have obtained good effect, and whole process of production does not steadily have the line clogging phenomenon, and hourly output reaches 11.5 tons.
Table 1
| Test event | Raise sub-J340 |
| Ethylene content mol% | ?19.2 |
| ?MFR????g/10min | ??1.7 |
| Yield strength MPa | ?25.2 |
| Elongation % | ?560 |
| Flexural strength MPa | ?882 |
| J/M23 ℃-20 ℃ of overhanging beam shock strengths | ?228 ?57.9 |
| Heat-drawn wire ℃ | ?84 |
| Rockwell hardness HRR | ?90.4 |
Claims (5)
1. a method that prevents that the blanking pipeline stops up in the polypropylene block copolymer production is characterized in that it comprises the following steps:
(A) pipeline that is exported to the powder blanking tank (3) of No. 3 polymerization reaction kettles (1) from No. 3 polymerization reaction kettles (1) powder conveying fans (7) increases a low-purity nitrogen introduction pipe line (5), and surperficial deactivator injects pipeline (6),
(B) before No. 4 polymerization reaction kettles (8) add ethene, inject pipeline (6) adding lower purified nitrogen and surperficial deactivator from lower purified nitrogen introduction pipe line (5) and surperficial deactivator earlier, before making ethylene-propylene copolymer, pipeline system is full of lower purified nitrogen and surperficial deactivator, and continuation adds lower purified nitrogen and surperficial deactivator
(C) in No. 4 polymerization reaction kettles (8), add ethene, production Ethylene-Propylene Block Copolymer.
2. method according to claim 1 is characterized in that surperficial deactivator is Atmer163.
3. method according to claim 2 is characterized in that the add-on of surperficial deactivator Armer163, and when the output of ethylene-propylene copolymer is 9-13 ton/time, the add-on of Armer163 is 7-15 liter/time.
4. according to the described method of claim 1, the content that it is characterized in that oxygen in the lower purified nitrogen is 5000-6000ppm.
5. according to the described method of claim 4, it is characterized in that the add-on of lower purified nitrogen, when the output of ethylene-propylene copolymer is 9-13 ton/time, the add-on of low-purity nitrogen is 6-13Nm
3/ time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011137568A CN1171908C (en) | 2001-07-06 | 2001-07-06 | Material pipe jam preventing method in production of polypropylene block copolymer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011137568A CN1171908C (en) | 2001-07-06 | 2001-07-06 | Material pipe jam preventing method in production of polypropylene block copolymer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1332179A true CN1332179A (en) | 2002-01-23 |
| CN1171908C CN1171908C (en) | 2004-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011137568A Expired - Fee Related CN1171908C (en) | 2001-07-06 | 2001-07-06 | Material pipe jam preventing method in production of polypropylene block copolymer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102731692A (en) * | 2011-04-02 | 2012-10-17 | 中国石油化工股份有限公司 | Method for eliminating sticking of polymer and abhesive |
-
2001
- 2001-07-06 CN CNB011137568A patent/CN1171908C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102731692A (en) * | 2011-04-02 | 2012-10-17 | 中国石油化工股份有限公司 | Method for eliminating sticking of polymer and abhesive |
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|---|---|
| CN1171908C (en) | 2004-10-20 |
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Owner name: SINOPEC YANGZI PETROCHEMICAL CO. Free format text: FORMER OWNER: YANGZI PETROCHEMICAL CO., LTD. Effective date: 20080314 |
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Effective date of registration: 20080314 Address after: Dachang District, Jiangsu, Xinhua Road, Nanjing Patentee after: Sinopec Yangzi Petrochemical Company Ltd. Address before: Dachang District, Jiangsu, Xinhua Road, Nanjing Patentee before: Yangtze Petrochemical Industry Co., Ltd. |
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Granted publication date: 20041020 Termination date: 20160706 |