专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JPH0123570B2 失效
公开(公告)号：JPH0123570B2
公开(公告)日：1989-05-08
申请号：JP15899084
申请日：1984-07-31
申请人： KIMURA KAKOKI CO LTD
发明人： TAJIRI TADAAKI , NISHIZAWA HITOSHI
IPC分类号： B01D1/28 , D01D5/06 , D01F13/02

2. 发明专利

JPS60125230A WET DESULFURIZATION PROCESS FOR ABSORPTIVE REMOVAL OF SULFUROUS ACID GAS IN EXHAUST GAS 失效
公开(公告)号：JPS60125230A
公开(公告)日：1985-07-04
申请号：JP23458383
申请日：1983-12-12
申请人： KIMURA KAKOKI CO LTD
发明人： NISHIZAWA HITOSHI , YANO KENSUKE
IPC分类号： B01D53/50 , B01D53/34 , B01D53/77
摘要： PURPOSE:To reduce the discharge amount of a discharged aqueous MgSO4 solution, by holding the pH value of the recirculation solution containing an Mg(OH)2 absorbent of an absorbing tower to a low value and depositing, separating and recovering MgSO4 from a waste absorbing solution. CONSTITUTION:Exhaust gas is guided to an absorbing tower 1 and brought into contact with a recirculation solution of which the pH is adjusted to 4.0-6.5 by an Mg(OH)2 slurry to absorb and remove SO2. A part of the recirculation solution is guided to a neutralization/crystallization tank 2 and Mg(OH)2 is added to said tank 2 from a pipe 14 to convert Mg(HSO3)2 in the solution to MgSO3. The deposited MgSO3 is guided to a solid-luquid separator 3, and separated and recovered. The filtrate is guided to an oxidizing tower 4 through a filtrate tank 16 and MgSO3 in the solution is oxidized to MgSO4 by air to be discharge out of the system as an aqueous MgSO4 solution from a pipe 19.

3. 发明专利

JPS5210857A PROCESS FOR REMOVAL OF HYDROGEN SULFIDE 失效
公开(公告)号：JPS5210857A
公开(公告)日：1977-01-27
申请号：JP8778475
申请日：1975-07-16
申请人： KIMURA KAKOKI CO LTD
发明人： HARA HIDETOSHI , KOIZUMI SHIZUO , NISHIZAWA HITOSHI
IPC分类号： B01D53/52 , B01D53/34 , B01D53/77 , C01B17/02 , C01B17/05
摘要： PURPOSE:In a wet oxidation process for converting hydrogen sulfide in the gas containing hydrogen sulfide to sulfur by contacting the gas with an absorbing solution containing redox catalysts thereby removing the hydrogen sulfide, arresting of fine sulfur particles is made easier by the use of surface active agents.

4. 发明专利

JPS60257822A REMOVAL OF HYDROGEN SULFIDE 失效
公开(公告)号：JPS60257822A
公开(公告)日：1985-12-19
申请号：JP11307984
申请日：1984-06-04
申请人： KIMURA KAKOKI CO LTD
发明人： TAJIRI TADAAKI , NISHIZAWA HITOSHI
IPC分类号： B01D53/52 , B01D53/34 , B01D53/77
摘要： PURPOSE:To enhance the purity of recovered sulfur by preventing the lowering in the removal ratio of H2S and suppressing side-reaction, by holding pH of an iron chelate absorbing solution to a specific range and holding the mol ratio of trivalent chelate iron to the total chelate iron in the absorbing solution after absorption to a specific range. CONSTITUTION:The pH of an absorbing solution containing an iron ion, EDTA and triethanolamine is held to 7-9 and H2S-containing exhaust gas is introduced into an absorbing tower 1 to be subjected to the gas-liquid contact treatment with the absorbing solution from a spray nozzle 8. At this time, the mol ratio of trivalent chelate iron to the total chelate iron in the absorbing solution directly after gas-liquid contact treatment is set to 0.60-0.90. The absorbing solution containing elemental sulfur obtained through the oxidation of H2S in exhaust gas is sent to an oxidizing tower 2 through a liquid chember 9 and the catalyst in the absorbing solution is oxidized while the treated absorbing solution is sent to a recirculation tank 3. Subsequently, the absorbing solution is supplied to a filter press 5 through a sulfur bubbling tank 4 to separate and recover solid sulfur.

5. 发明专利

JPS60125231A WET DESULFURIZATION PROCESS FOR ABSORPTIVE REMOVAL OF SULFUROUS ACID GAS IN EXHAUST GAS 失效
公开(公告)号：JPS60125231A
公开(公告)日：1985-07-04
申请号：JP23458483
申请日：1983-12-12
申请人： KIMURA KAKOKI CO LTD
发明人： NISHIZAWA HITOSHI , YANO KENSUKE
IPC分类号： B01D53/50 , B01D53/34 , B01D53/77 , C01F5/42
摘要： PURPOSE:To bring the titled desulfurization system to a closed system not discharging a MgSO4 solution, by adding a chelate agent to the recirculation solution containing Mg(OH)2 as absorbent of an absorbing tower and keeping the pH thereof low while depositing, separating and recovering MgSO4 from a waste absorbing solution. CONSTITUTION:Exhaust gas is guided to an absorbing tower 1 and brought into contact with a recirculation solution, of which the pH is adjusted to 4.0-6.5 by an Mg(OH)2 slurry and to which a chelate agent such as EDTA is added from a pipe 9, to absorb and remove SO2. A part of the recirculation solution is guided to a neutralization/crystallization tank 2 while Mg(OH)2 is added thereto from a pipe 14 to convert Mg(HSO3)2 in the solution to Mg(SO3)2. The deposited MgSO3 crystal is guided to a solid-liquid separator 3 and separated and recovered. The filtrate is refluxed into the absorbing tower 1 through a filtrate tank 16 and a pipe 18.

6. 发明专利

JPH0123569B2 失效
公开(公告)号：JPH0123569B2
公开(公告)日：1989-05-08
申请号：JP15898984
申请日：1984-07-31
申请人： KIMURA KAKOKI CO LTD
发明人： TAJIRI TADAAKI , NISHIZAWA HITOSHI
IPC分类号： B01D1/28 , D01D5/06 , D01F13/02

7. 发明专利

JPS5423069A HYDROGEN SULFIDE REMOVAL METHOD 失效
公开(公告)号：JPS5423069A
公开(公告)日：1979-02-21
申请号：JP8866277
申请日：1977-07-23
申请人： KIMURA KAKOKI CO LTD
发明人： HARA HIDETOSHI , YUI SHIYOUJI , SASAKI TSUTOMU , NISHIZAWA HITOSHI
IPC分类号： B01D53/14 , B01D53/34 , B01D53/52 , B01D53/77 , C01B17/04 , C01B17/05

8. 发明专利

JPS542273A TREATMENT OF GAS CONTAINING HYDROGEN SULFIDE AND SULFUR DIOXIDE 失效
公开(公告)号：JPS542273A
公开(公告)日：1979-01-09
申请号：JP6805977
申请日：1977-06-08
申请人： KIMURA KAKOKI CO LTD
发明人： HARA HIDETOSHI , NISHIZAWA HITOSHI
IPC分类号： B01D53/50 , B01D53/14 , B01D53/34 , B01D53/52 , B01D53/77 , C01B17/04 , C01B17/05

9. 发明专利

JPS60261531A WET DESULFURIZING METHOD OF WASTE GAS 失效
公开(公告)号：JPS60261531A
公开(公告)日：1985-12-24
申请号：JP11756384
申请日：1984-06-07
申请人： KIMURA KAKOKI CO LTD
发明人： NISHIZAWA HITOSHI , YANO KENSUKE
IPC分类号： B01D53/50 , B01D53/34 , B01D53/77
摘要： PURPOSE:To prevent the generation of scale by maintaining the pH of Mg(OH)2 absorption soln. in the specified range of acidic side and regulating the pH of the waste absorption soln. to neutral in an oxidation tower to oxidize it with air. CONSTITUTION:Mg(OH)2 slurry as an absorption soln. is regulated to 4.0-6.0pH. The waste gas is introduced into an absorption tower 1 and brought into contact with the circulating soln. to absorb and remove SO2 contained in the waste gas. One part of the circulating soln. is introduced into an oxidation tower 2 through a pipe 11 and made neutral with Mg(OH)2 fed through a pipe 12 to convert Mg(HSO3)2 contained in the soln. into MgSO3 and together MgSO3 is oxidized into MgSO4 with air fed through a pipe 13 and discharged to the outside of the system through a pipe 14. The ratio of MgSO3 for all sulfites incorporated in the circulating soln. is made small by regulating the pH of the circulation soln. in the absorption tower to 4.0-6.0 and because the ratio of easily soluble Mg (HSO3)2 is increased, there is no such terribleness that the scaling is caused.

10. 发明专利

JPS5488874A HYDROGEN SULFIDE REMOVING METHOD 失效
公开(公告)号：JPS5488874A
公开(公告)日：1979-07-14
申请号：JP16081677
申请日：1977-12-26
申请人： KIMURA KAKOKI CO LTD
发明人： HARA HIDETOSHI , OKUDA SHIGEO , TAJIRI TADAAKI , MIYAMOTO YOSHINORI , NISHIZAWA HITOSHI
IPC分类号： B01D53/14 , B01D53/52 , B01D53/77 , C01B17/04 , C01B17/05

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式