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1. 发明专利

JP2002120223A APPARATUS FOR DECHLORINATION TREATMENT ON WASTE PLASTIC 失效
公开(公告)号：JP2002120223A
公开(公告)日：2002-04-23
申请号：JP2000314287
申请日：2000-10-13
申请人： JAPAN STEEL WORKS LTD , TOKUYAMA CORP
发明人： HASHIMOTO NORIAKI , SUMIHIRO YUKIHIRO , TOKIHISA MASAYOSHI , CHIMURA TEI , SATO TORU , IMADA MASATAKA
IPC分类号： B09B3/00 , B29B17/00
摘要： PROBLEM TO BE SOLVED: To solve a problem wherein a phenomenon of clogging of the residue of dechlorination in a die occurs when dechlorination treatment of a waste plastic is performed by using an extruder, especially in the case of the waste plastic containing high concentration polyvinyl chloride. SOLUTION: The apex part of a screw 7 is brought to a die part 5 as close as possible within a range where the thermally expanded screw 7 is not brought into contact with the die part 5 and a gap d is provided between the apex part of the screw 7 and the inner face of an inlet side of the die part 5 and nozzles 5a are formed on the periphery on the outer diameter side of the gap d.

2. 发明专利

JP2001026402A RECOVERY OF HYDROGEN CHLORIDE 失效
公开(公告)号：JP2001026402A
公开(公告)日：2001-01-30
申请号：JP20005899
申请日：1999-07-14
申请人： TOKUYAMA CORP
发明人： IMADA MASATAKA , TAMAKI TOMOHIRO
IPC分类号： B01D53/34 , B01D53/68 , C01B7/01 , C08J11/12
摘要： PROBLEM TO BE SOLVED: To stably recover hydrogen chloride from hot exhaust gas, based on gaseous hydrogen chloride generated by thermally decomposing a chlorine- containing resin, while removing the moisture or the like from the host exhaust gas by containing the hot exhaust gas with an organic solvent that is not active to the hydrogen chloride and containing water of an amount that exceeds the saturated solubility. SOLUTION: The chlorine-containing resin in the waste of vinyl chloride resin or the like is heated to around 300-400 deg.C and decomposed into a carbide using a rotary kiln or the like, preferably, having a non-oxidized atmosphere with an inert gas such as nitrogen. The exhaust gas based on gaseous hydrogen chloride discharged when decomposed is brought into contact with the organic solvent, preferably, a chlorine-containing hydrocarbon such as ethylene dichloride, which is not active to the hydrogen chloride and containing water of an amount that exceeds the saturated solubility while keeping gas state, preferably the temperature of >=200 deg.C. This method does not cause the clogging of pipelines owing to high boiling pint organic compounds. The impurities caused by the moisture and additives are efficiently removed and the purified gaseous hydrogen chloride can be recovered stably.

3. 发明专利

JPH11286685A PREPARATION OF CARBIDE 失效
公开(公告)号：JPH11286685A
公开(公告)日：1999-10-19
申请号：JP9047898
申请日：1998-04-02
申请人： TOKUYAMA CORP
发明人： SATO TORU , IMADA MASATAKA
IPC分类号： C04B7/44 , C10B53/00 , C10B53/07 , C10L5/48
摘要： PROBLEM TO BE SOLVED: To provide a process for obtaining carbides by efficiently carrying out thermal decomposition of chlorine-containing plastics and a process for manufacturing cement using the resulting carbides. SOLUTION: A process for producing dechlorinated carbides by the thermal decomposition of chlorine-containing plastics comprises carrying out the thermal decomposition of the chlorine-containing plastics in a state mixed with cement clinker powder, and a process for producing cement comprises feeding the resulting carbides as part of fuels from a fuel feed zone for burning cement raw materials in the cement manufacturing plant equipment.

4. 发明专利

JPH11286687A PRODUCTION OF CARBONIZATION PRODUCT 失效
公开(公告)号：JPH11286687A
公开(公告)日：1999-10-19
申请号：JP9048298
申请日：1998-04-02
申请人： TOKUYAMA CORP
发明人： SATO TORU , IMADA MASATAKA
IPC分类号： C04B7/44 , C01B7/01 , C10B53/00 , C10B53/07 , C10B57/08
摘要： PROBLEM TO BE SOLVED: To efficiently produce a carbonization product while preventing the damage to the inner wall of a decomposition apparatus by mixing a chlorinated plastic with a carbonization product obtd. by the thermal decomposition of a chlorinated plastic and then decomposing the mixture. SOLUTION: 100 pts.wt. chlorinated plastic is mixed with 3-300 pts.wt., pref. 5-200 pts.wt., still pref. 5-50 pts.wt., carbonization product obtd. by the thermal decomposition of a chlorinated plastic and having an average particle size of 0.01-2 mm, pref. 0.02-1 mm, under such mixing conditions that the surface of the chlorinated plastic slightly melts. The resulting mixture is fed to a thermal decomposition oven such as a rotary kiln, a fluidized bed oven, or a vertical oven and is decomposed in an inert gas atmosphere at 250-350 deg.C for 5 min to 5 hr, pref. 10-60 min. The resulting hydrogen chloride is subjected to oxychlorination reaction with ethylene to give ethylene dichloride.

5. 发明专利

JPH11286686A CARBONIZATION PRODUCT 失效
公开(公告)号：JPH11286686A
公开(公告)日：1999-10-19
申请号：JP9047998
申请日：1998-04-02
申请人： TOKUYAMA CORP
发明人： SATO TORU , IMADA MASATAKA
IPC分类号： C04B7/44 , C01B7/01 , C10B53/00 , C10B53/07 , C10B57/06
摘要： PROBLEM TO BE SOLVED: To provide a carbonization product while preventing a chlorinated plastic from adhering to each other and from adhering to the inner wall of a decomposition apparatus and while improving the decomposition ratio by mixing a chlorinated plastic with an oil coke powder and decomposing the mixture. SOLUTION: 100 pts.wt. chlorinated plastic in irregular, spherical, circular cylindrical, prismatic, or cubic shape having a major axis of 1-30 mm, pref. 2-5 mm, and a thickness of 30 mm or lower is mixed with 3-500 pts.wt., pref. 5-300 pts.wt., still pref. 5-50 pts.wt., oil coke powder having an average particle size of 0.01-2 mm, pref. 0.02-1 mm, under such conditions that the surface of the plastic slightly melts. The resulting mixture is fed to a thermal decomposition oven such as a rotary kiln, a fluidized bed oven, or a vertical oven and is decomposed in an inert gas atmosphere at 250-350 deg.C for 5 min to 5 hr, pref. 10-60 min. The resulting hydrogen chloride gas is absorbed by an aq. alkali soln.

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