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1. 发明专利

JPS62244427A TREATMENT FOR FLUE GAS DESULFURIZATION ABSORPTION LIQUID 失效
公开(公告)号：JPS62244427A
公开(公告)日：1987-10-24
申请号：JP8900786
申请日：1986-04-17
申请人： KUREHA CHEMICAL IND CO LTD
发明人： AOKI HARUO , KUDO YOSHIHIKO
IPC分类号： B01D53/50 , B01D53/77 , B01D61/44 , C01F5/30 , C01F11/46 , C02F1/469
摘要： PURPOSE:To separate and remove Cl contained in gypsum saturated liquid while preventing deposition of gypsum by subjecting gypsum saturated liquid to clarifying treatment and thereafter introducing it into an electrodialysis device consisting of a cation exchange membrane and a monovalent anionic permselective membrane. CONSTITUTION:An electrodialysis device is constituted of an intermediate chamber M partitioned by monovalent anionic permselective membranes A1, A2, a concentration chamber C partitioned by A2 and a cation exchange membrane K and desalting chambers D partitioned by K and A1. Gypsum saturated liquid is introduced into the desalting chamber D through a line 1 and Cl contained in the liquid is passed through the membranes A1, A2 and collected in the concentration chamber C. In this case, SO4 is partially passed through the membrane A1 but is not passed through the membrane A2 and cation is passed through the membrane K and transferred to the concentration chamber C but is not passed through the membrane A2 and therefore the deposition of gypsum is prevented. Treated liquid is discharged through a line 5 and recirculated and Cl concentrated liquid is discharged through a line 3 and treated as waste water.

2. 发明专利

JPS61295233A PRODUCTION OF ALPHA-TYPE HEMIHYDRATE GYPSUM 失效
公开(公告)号：JPS61295233A
公开(公告)日：1986-12-26
申请号：JP13540485
申请日：1985-06-21
申请人： KUREHA CHEMICAL IND CO LTD
发明人： KUDO YOSHIHIKO
IPC分类号： C01F11/46
摘要： PURPOSE:To obtain the high-density alpha-type hemihydrate gypsum of good quality by heating and dehydrating gypsum dihydrate by the use of sulfo-succinate in a slurry state in order to convert said gypsum dihydrate into alpha-type hemihydrate gypsum. CONSTITUTION:In case of producing alpha-hemihydrate by heating and dehydrating gypsum dihydrate in the slurry state, sulfo-succinate is used as a crystalizing agent. When the crystalizing agent is allowed to coexist with MgSO4 and the other inorganic salts, or when the water-soluble inorganic salts stick to gypsum dihydrate acting as the raw material, these inorganic slats grow to be mixed into the medium solution because of reduction of the temperature in performing the above-described process. These inorganic ions except sodium ion can be removed by washing the resultant alpha-gypsum, so the regulation of the above- described washing degree is desired in accordance with the physical properties required for alpha-gypsum.

3. 发明专利

JPS6154452B2 失效
公开(公告)号：JPS6154452B2
公开(公告)日：1986-11-22
申请号：JP9222278
申请日：1978-07-28
申请人： KUREHA CHEMICAL IND CO LTD
发明人： KUDO YOSHIHIKO , HAGIWARA HIROSHI
IPC分类号： B01D53/34 , B01D53/60 , B01D53/77 , C01B17/05 , C01B17/16 , C01C1/02

4. 发明专利

JPS6121690B2 JPS6121690B2 - 失效
公开(公告)号：JPS6121690B2
公开(公告)日：1986-05-28
申请号：JP19944083
申请日：1983-10-25
申请人： Kureha Chemical Ind Co Ltd
发明人： KUDO YOSHIHIKO
IPC分类号： B01D53/50 , B01D53/77 , C01F11/46
CPC分类号： B01D53/501 , C01F11/464

5. 发明专利

JPS5935654B2 JPS5935654B2 - 失效
公开(公告)号：JPS5935654B2
公开(公告)日：1984-08-30
申请号：JP15525976
申请日：1976-12-23
申请人： Kureha Chemical Ind Co Ltd
发明人： KOBAYASHI AKIO , KUDO YOSHIHIKO , TAKAIWA MASAKAZU
IPC分类号： B01D53/50 , B01D53/14 , B01D53/34 , B01D53/77 , C01D5/00 , C01D5/04 , C01F11/46

6. 发明专利

JPS5850767B2 JPS5850767B2 - 失效
公开(公告)号：JPS5850767B2
公开(公告)日：1983-11-12
申请号：JP11378980
申请日：1980-08-19
申请人： Kureha Chemical Ind Co Ltd
发明人： KUDO YOSHIHIKO , SUZUKI YUKIO , OOTOMO MITSURU
IPC分类号： B01D53/50 , B01D53/77 , C01F11/46
CPC分类号： B01D53/501

7. 发明专利

JPH09262433A COOLING ABSORBER FOR HIGH TEMPERATURE HARMFUL GAS AND METHOD THEREOF 失效
公开(公告)号：JPH09262433A
公开(公告)日：1997-10-07
申请号：JP9905696
申请日：1996-03-28
申请人： KUREHA CHEMICAL IND CO LTD , KUREHA ENG KK
发明人： WATANABE RYOICHI , KUDO YOSHIHIKO , YABANA MASAHARU , TAKAHASHI TAKESHI
IPC分类号： B01D53/68 , B01D47/06 , B01D47/10 , B01D53/77
摘要： PROBLEM TO BE SOLVED: To remove corrosive harmful components by using a vertical flue tube end part whose lower part is opened into a wetted wall column for a venturi type restriction pipe and providing a cooling liquid absorbent spray nozzle adjacent to the inlet of the throat part of the restriction pipe to effectively cool the high temperature waste gas to the steam saturation temperature. SOLUTION: A vertical flue pipe end part 1 is inserted into a wetted wall column 2, and has a taper whose diameter is made small downward above the upper cover part of the wetted wall column 2 to form a venturi type restriction pipe which is opened into the wetted wall column 2 with a flare. A cooling liquid absorbent spray nozzle 3 is fitted to a position adjacent to the inlet of the throat part of the venturi type restriction pipe. By spraying a cooling liquid absorbent to a part in which high temperature waste gas is restricted by the throat part to make it have high velocity, liquid droplets are more atomized. And by strong agitation and mixing, gas-liquid contact efficiency is increased to adiabatically cool the high temperature waste gas to the steam saturation temperature at a stretch. Therefore, corrosive harmful components such as hydrogen chloride contained in the high temperature waste gas is absorbed and removed with high removal efficiency.

8. 发明专利

JPH05163048A PRODUCTION OF ALPHA-TYPE HEMIHYDRATE GYPSUM 失效
公开(公告)号：JPH05163048A
公开(公告)日：1993-06-29
申请号：JP33522091
申请日：1991-12-18
申请人： KUREHA CHEMICAL IND CO LTD , KUREHA ENG KK
发明人： YAMAZAKI AKIRA , KUDO YOSHIHIKO
IPC分类号： C04B11/032 , C01F11/46
摘要： PURPOSE:To improve quality of the subject gypsum by reacting slurry of dihydrate gypsum having a specific concentration with steam in a condition controlled at definite temperature and detecting a time when the reaction is finished by lowering of flow rate of heated steam. CONSTITUTION:Dihydrate gypsum is mixed with a habit modifier in a raw material slurry preparing tank 1 to prepare slurry having 40-65wt.% dihydrate gypsum concentration and steam 7 is blown into the slurry to retain the slurry temperature to >=90 deg.C. Then the slurry is transferred into a reactional tank 2 and the slurry is charged so that apparent volume of the produced a type hemihydrate gypsum (hereinafter referred to as a gypsum) becomes equal to basket volume of a solid liquid separator 3 and steam 7 is blown into the slurry to control the reactional tank 2 to 110-150 deg.C. A steam amount is controlled so that temperature in the reactional tank 2 retains to prescribed temperature and alpha-gypsum forming reaction is finished at the time when steam amount is lowered. Lowering of flow rate of the steam 7 is detected by opening and closing degree of a control valve 8. The produced alpha-gypsum slurry is cooled and taken out to a solid liquid separator 3 and alpha-gypsum cake is washed with warm water so as to remove the habit modifier to provide the high-purity objective alpha-gypsum.

9. 发明专利

JPS6414112A PRODUCTION OF ALPHA-TYPE GYPSUM HEMIHYDRATE 失效
公开(公告)号：JPS6414112A
公开(公告)日：1989-01-18
申请号：JP17036987
申请日：1987-07-08
申请人： KUREHA CHEMICAL IND CO LTD
发明人： KUDO YOSHIHIKO
IPC分类号： C01F11/46
摘要： PURPOSE:To industrially and advantageously produce the title alpha-type gypsum hemihydrate by concentrating and regenerating a liq. habit modifier diluted with the water secondarily produced in the process by utilizing the waste heat of a high-temp. combustion exhaust gas in a flue gas desulfurizer, circulating, and using the regenerated modifier when alpha-type gypsum hemihydrate is produced from gypsum dihydrate by the pressurized aq. soln. method. CONSTITUTION:A slurry of gypsum dihydrate is heated together with a liq. habit modifier contg. at least magnesium sulfosuccinate or magnesium succinate, and dehydrated to produce alpha-type gypsum hemihydrate in the pressurized aq. soln. method. In this case, the dil. modifier obtained at the time of separating the alpha-type gypsum hemihydrate obtained in the dehydration reaction from liq. is introduced into a cooling and hymidifying part independently provided in the preceding stage of a flue gas desulfurizer, evaporated, and concentrated. The pH of the obtained liq. is adjusted, and a regenerated liq. habit modifier is obtained.

10. 发明专利

JPS63289000A METHOD FOR REMOVING CARBONACEOUS MATERIAL FROM MIXTURE OF DIAMOND AND CARBONACEOUS MATERIAL 失效
公开(公告)号：JPS63289000A
公开(公告)日：1988-11-25
申请号：JP12504787
申请日：1987-05-21
申请人： AGENCY IND SCIENCE TECHN , KUREHA CHEMICAL IND CO LTD
发明人： FUJIWARA SHUZO , AOKI KATSUTOSHI , KADODATE YOUZOU , USUHA KUNI , YOSHIDA MASANORI , TANAKA KATSUMI , KUDO YOSHIHIKO
IPC分类号： C30B33/12 , C01B31/06 , C30B29/04 , C30B33/00
摘要： PURPOSE:To selectively oxidize and remove carbonaceous material excepting diamond and to enhance purity of diamond by bringing a mixture of diamond and carbonaceous material excepting diamond into contact with activated oxygen plasma in a specified temp. range. CONSTITUTION:In the case of removing carbonaceous material excepting diamond from a mixture of diamond and carbonaceous material excepting diamond by a gaseous phase oxidation method, the above-mentioned mixture is brought into contact with activated oxygen plasma at 15-300 deg.C temp. and carbonaceous material is selectively oxidized and removed. By utilizing activated oxygen plasma, carbonaceous material can be effectively removed from the mixture of impact-synthesized diamond powder and nonreactive residual carbonaceous material.

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