JPS63117901A - Manufacture of composition capable of being used for manufacturing sodium dithionite - Google Patents
Manufacture of composition capable of being used for manufacturing sodium dithioniteInfo
- Publication number
- JPS63117901A JPS63117901A JP61262892A JP26289286A JPS63117901A JP S63117901 A JPS63117901 A JP S63117901A JP 61262892 A JP61262892 A JP 61262892A JP 26289286 A JP26289286 A JP 26289286A JP S63117901 A JPS63117901 A JP S63117901A
- Authority
- JP
- Japan
- Prior art keywords
- sulfur dioxide
- sodium
- conduit
- ratio
- sodium oxide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000203 mixture Substances 0.000 title claims description 22
- 238000004519 manufacturing process Methods 0.000 title claims description 19
- JVBXVOWTABLYPX-UHFFFAOYSA-L sodium dithionite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])=O JVBXVOWTABLYPX-UHFFFAOYSA-L 0.000 title claims description 8
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 93
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 11
- 229910001948 sodium oxide Inorganic materials 0.000 claims description 11
- 239000003638 chemical reducing agent Substances 0.000 claims description 8
- 239000007864 aqueous solution Substances 0.000 claims description 7
- GRWZHXKQBITJKP-UHFFFAOYSA-L dithionite(2-) Chemical compound [O-]S(=O)S([O-])=O GRWZHXKQBITJKP-UHFFFAOYSA-L 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 239000012895 dilution Substances 0.000 claims 1
- 238000010790 dilution Methods 0.000 claims 1
- 239000000243 solution Substances 0.000 description 23
- 239000007789 gas Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 6
- WQDSRJBTLILEEK-UHFFFAOYSA-N sulfurous acid Chemical compound OS(O)=O.OS(O)=O WQDSRJBTLILEEK-UHFFFAOYSA-N 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000012279 sodium borohydride Substances 0.000 description 3
- 229910000033 sodium borohydride Inorganic materials 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- YHFXJKYHUWPWSJ-UHFFFAOYSA-L [Na+].[Na+].OS([O-])=O.OS([O-])=O Chemical compound [Na+].[Na+].OS([O-])=O.OS([O-])=O YHFXJKYHUWPWSJ-UHFFFAOYSA-L 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910004742 Na2 O Inorganic materials 0.000 description 1
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000008139 complexing agent Substances 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000003189 isokinetic effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/64—Thiosulfates; Dithionites; Polythionates
- C01B17/66—Dithionites or hydrosulfites (S2O42-)
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Treating Waste Gases (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明は亜ジチオン酸ナトリウムの製造に用い得る組成
物の製造方法および該組成物の使用に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a composition that can be used in the production of sodium dithionite and to the use of said composition.
亜ジチオン酸ナトリウムを製造するための既知の方法に
よると、４０〜５０重ｆｉｔ％の水酸化ナトリウム溶液
、液体二酸化イオウおよび水が。According to the known method for producing sodium dithionite, 40-50% by weight sodium hydroxide solution, liquid sulfur dioxide and water.
水素化ホウ素ナトリウム１２重量％、水酸化ナトリウム
４０１１および水４８重量係からなる還元剤混合物と導
管系中で発生した多量の反応熱を逃がすために混合物を
循環させながら混合される。−緒に混合されるべき成分
が多数であるために、いくつもの調整が必要である。そ
れに加えて液体二酸化イオウは取り扱いが困難である。A reducing agent mixture consisting of 12% by weight of sodium borohydride, 4011 parts by weight of sodium hydroxide and 48 parts by weight of water is mixed with the mixture being circulated to dissipate the large amount of reaction heat generated in the conduit system. - Many adjustments are required due to the large number of components to be mixed together. In addition, liquid sulfur dioxide is difficult to handle.
したがって本発明の目的は、亜ジチオン酸ナトリウムの
製造に用い得る組成物の製造方法を提供することそして
取り扱う必要のある成分の数を減らすことにより、そし
てこれによって必要な調整の回数を減らすことにより、
さらに冷却の必要を減らすことによって該亜ジチオン酸
塩の製造操作を容易にすることである。It is therefore an object of the present invention to provide a process for the production of a composition which can be used for the production of sodium dithionite and by reducing the number of ingredients that have to be handled and thereby reducing the number of adjustments required. ,
Furthermore, the dithionite manufacturing operation is facilitated by reducing the need for cooling.
これは本発明においてＶｉ、水酸化ナトリウムと予じめ
吸収されている二酸化イオウとの再循環水溶液に二酸化
イオウを二酸化イオウ対二酸化イオウと酸化ナトリウム
の合計との比（８０２／（ＳＯ２＋Ｎａ２Ｏ））が０．
６１〜０．６６、 好ましくは０．６３〜０．６５に
なるように接触させ、次いで生成した混合物を加圧しそ
してそれに二酸化イオウ対二酸化イオウと酸化ナトリウ
ムの合計との比が０．７１〜０．８１．好ましくは約０
．７８になるように液体二酸化イオウを導入し、そして
１０〜１３重量％、好ましくは約１２重量％の二酸化イ
オウ＋酸化ナトリウム濃度になるように水の含有量を調
節することからなっている。In the present invention, Vi, the ratio of sulfur dioxide to the sum of sulfur dioxide and sodium oxide (802/(SO2+Na2O)) is 0.
61 to 0.66, preferably 0.63 to 0.65, the resulting mixture is then pressurized and it has a ratio of sulfur dioxide to the sum of sulfur dioxide and sodium oxide of 0.71 to 0. .81. Preferably about 0
．． 78 and adjusting the water content to a sulfur dioxide+sodium oxide concentration of 10 to 13% by weight, preferably about 12% by weight.
二酸化イオウが水酸化ナトリウムと予じめ吸収されてい
る二酸化イオウとの再循環水溶液と接触させられる本発
明による方法の上記最初の段階では、二酸化イオウは好
ましくは硫酸の製造において得られる好ましくは乾燥し
た二酸化イオウを含有する排出ガスのかたちで導かれる
。In said first stage of the process according to the invention, in which the sulfur dioxide is brought into contact with a recycled aqueous solution of sodium hydroxide and preabsorbed sulfur dioxide, the sulfur dioxide is preferably dried, preferably obtained in the production of sulfuric acid. This is carried out in the form of exhaust gas containing sulfur dioxide.
ガスを水酸化ナトリウムと二酸化イオウとの再循環水溶
液と一緒に取扱う際に水の凝縮を防止するための処置が
とられるならばイオウ含有燃料を燃焼させるプラントか
ら得られる排出ガスもまた使用できる。二酸化イオウ含
有ガスは好ましくは慣用のスフラメ−プラント中で上記
の再循環水溶液と接触させられる。Exhaust gas obtained from plants burning sulfur-containing fuels can also be used if steps are taken to prevent water condensation when the gas is handled with recycled aqueous solutions of sodium hydroxide and sulfur dioxide. The sulfur dioxide-containing gas is preferably contacted with the recycled aqueous solution in a conventional sulfur plant.
本号法のこの段階は好ましくはほぼ大気圧下で連続的に
遂行され、該溶液の一部が循環から取り出されて水酸化
す） ＩＪウムの水溶液で置換されるが、この段階はま
た断続的に行われることもできる。この方法は生成する
混合物が二酸化イオウ対二酸化イオウと酸化ナトリウム
の合計との比が０，６１〜０．６６、 好ましくけ０
．６３〜０．６５を示すように両者を選択して調節され
る。This step of the process is preferably carried out continuously under approximately atmospheric pressure, with a portion of the solution being removed from circulation and replaced with an aqueous solution of IJium (hydroxidized), but this step can also be carried out intermittently. It can also be done manually. This method produces a mixture in which the ratio of sulfur dioxide to the sum of sulfur dioxide and sodium oxide is between 0.61 and 0.66, preferably 0.
．． Both are selected and adjusted so as to show a range of 63 to 0.65.
本方法の第２の段階では最初の段階で得られた混合物は
加圧壁間まだは室、好ましくは上流は再循環ポンプで規
制され下流は締めつけ手段（ｏｎｓｔｒｉｃｔｉｏｎ）
で規制されている再循環ループの部分の形になっている
例えば２．５パールまたはそれ以上のオーダの圧力下に
ある空間に移され、該空間内で液体二酸化イオウが該混
合物中に８０２／（ＳＯ２＋Ｎａ２Ｏ）の比が０．７５
〜０．８１． 好ましくは約０．７８になるまで導入
され、そして大気圧で貯蔵できる溶液形態の生成物を得
るように。In the second stage of the process, the mixture obtained in the first stage is passed through a chamber between pressurized walls, preferably regulated upstream by a recirculation pump and downstream by constriction means.
into a space under pressure of the order of 2.5 par or more, for example in the form of part of a recirculation loop regulated by The ratio of (SO2+Na2O) is 0.75
~0.81. It is preferably introduced to about 0.78 to obtain a product in the form of a solution that can be stored at atmospheric pressure.
１０〜１３嵐量％、好ましくは約１２蒐量係の二酸化イ
オウ＋酸化ナトリウム濃度にまで水の含有量をｗ４節す
る。The water content is reduced to a sulfur dioxide + sodium oxide concentration of 10-13% by weight, preferably about 12% by weight.
本発明はまた還元による亜ジチオン酸塩の製造用に本発
明の方法によって製造された組成物を使用することにも
関する。使用に際しては組成物は好ましくは上記の慣用
の種類の還元剤混合物と混合され、そして任意には水を
加えて混合物を希釈しながら任意に導管系中で再循環さ
れる。もし必要ならば混合物は循環の間ではなくて循環
の前に水で希釈でき、または最終生成物それ自体が希釈
されうる。The invention also relates to the use of the composition produced by the process of the invention for the production of dithionite by reduction. In use, the composition is preferably mixed with a reducing agent mixture of the conventional types described above and optionally recycled in the conduit system, optionally with the addition of water to dilute the mixture. If necessary, the mixture can be diluted with water before the circulation rather than during it, or the final product itself can be diluted.
本発明を図面に示したプラントに関連してより詳細に説
明し、そして本発明による亜ジチオン酸ナトリウムの製
造についても説明する。The invention will be explained in more detail in connection with the plant shown in the drawings, and the production of sodium dithionite according to the invention will also be explained.
図において１および２は各々タンク車およびタンクトレ
ーラを示す。タンク車１は液体二酸化イオウを入れるた
めに用いられ、タンクトレーラ２は亜硫酸ナトリウム−
重亜硫酸ナトリウム溶液をｓｏ２／（日０２＋Ｎａ ２
Ｏ ）の比が０．６１〜０．６５のオーダにありそして
濃度が例えば４０重量％のオーダにあるように調整する
ために用いられる。In the figure, 1 and 2 indicate a tank car and a tank trailer, respectively. The tank truck 1 is used to contain liquid sulfur dioxide, and the tank trailer 2 is used to contain sodium sulfite.
Sodium bisulfite solution so2/(day02+Na2
O ) is of the order of 0.61-0.65 and the concentration is of the order of 40% by weight, for example.
タンク車１およびトレーラ２のタンクの内容物を合計し
た時の二酸化イオウ＋酸化ナトリウムの全濃度は約５０
重量％が適切である。The total concentration of sulfur dioxide + sodium oxide when the contents of the tanks of tank car 1 and trailer 2 are combined is approximately 50
Weight % is appropriate.
３はほぼ大気圧の内部圧力を有しそして再循環系の部分
を構成しているタンクを示す。再循環系は循環ポンプ４
．タンク３からポンプ４の吸込側に延びる導管５．ポン
プ４の加圧側とタンク３との間に延び閉鎖弁７を備えた
導管６゜制限部材８および拡大断面を有する導管部９を
備えている。タンク車１のタンクはポンプ１゜を備えた
導管１１により導管部９に接続されることができ、一方
、タンクトレーラ２はポンプ１２ｔ−備えた導管１３に
より導管５に接続されることができる。１４は水供給導
管を示し３つの導管１５，１６．１７に分岐している。3 indicates a tank which has an internal pressure of approximately atmospheric pressure and which forms part of the recirculation system. Recirculation system is circulation pump 4
．． A conduit 5 extending from the tank 3 to the suction side of the pump 4. A conduit 6 extending between the pressure side of the pump 4 and the tank 3 and provided with a closing valve 7 is provided with a restriction member 8 and a conduit section 9 with an enlarged cross section. The tanks of the tank car 1 can be connected to the conduit section 9 by a conduit 11 with a pump 1°, while the tank trailer 2 can be connected to the conduit 5 by a conduit 13 with a pump 12t. Reference numeral 14 indicates a water supply conduit, which branches into three conduits 15, 16, and 17.
導管１５は導管１３を通って運ばれる亜硫酸塩−重亜硫
酸塩溶液を希釈するために導管５に水を供給する。Conduit 15 supplies water to conduit 5 to dilute the sulfite-bisulfite solution conveyed through conduit 13.
タンク車１およびタンクトレーラ２を空にしながら入口
側導管１１，１３．１４を通る流れおよび再循環系６−
９中の流れは図示されていない調節手段によって調整さ
れ、そして制限手段８を調節することにより導管部９に
おいて例えば２．５ノζ−ルのオーダの圧力が維持され
る。Flow and recirculation system 6- through inlet conduits 11, 13, 14 while emptying tank car 1 and tank trailer 2
The flow in 9 is regulated by regulating means, not shown, and by adjusting the restricting means 8 a pressure of the order of, for example, 2.5 nm is maintained in the conduit section 9.
これは有利な方法で慣用の尚価な圧力容器を備える必要
性を回避する。これまで記載してきた装置によって８０
２／（ＳＯ２＋Ｎａ２Ｏ）の比が０７５〜０．８１であ
り大気圧で貯蔵できる濃度（１０〜１６重ｉ１％）を有
する亜硫酸ナトリウム−重亜硫酸ナトリウム溶液が製造
されタンク３に供給される。This advantageously avoids the need to provide conventional and expensive pressure vessels. 80 by the devices described so far.
A sodium sulfite-sodium bisulfite solution having a ratio of 2/(SO2+Na2O) of 075 to 0.81 and a concentration (10 to 16 weight i1%) that can be stored at atmospheric pressure is produced and supplied to tank 3.
ポンプ４の加圧側は閉鎖弁１８を備える導管１９によっ
て貯蔵タンク２Ｏに接続されることができ、該貯蔵タン
クにおける圧力はまたほぼ大気圧になっている。タンク
２Ｏの上方部分から排出されるガスは次に導管１７を通
って供給される水で洗浄されるべくスクラバー２１また
は同様の装置内に導かれる。溶解された二酸化イオウを
含むこの水は導管２２を経てタンク３に供給される。タ
ンク３の上方部分に集められたガスは導管１６を通って
くる水でスプレーされ、一方未溶解ガスはガス導管２３
を経てタンク２Ｏの上方部分に導かれる。The pressure side of the pump 4 can be connected by a conduit 19 with a closing valve 18 to a storage tank 2O, in which the pressure is also approximately atmospheric pressure. The gas discharged from the upper part of tank 2O is then led into a scrubber 21 or similar device to be scrubbed with water supplied through conduit 17. This water containing dissolved sulfur dioxide is supplied to tank 3 via conduit 22. The gas collected in the upper part of the tank 3 is sprayed with water coming through the conduit 16, while the undissolved gas is passed through the gas conduit 23.
and is guided to the upper part of tank 2O.
亜ジチオン酸ナトリウムの製造を目的として。For the purpose of manufacturing sodium dithionite.
タンク２からの溶液は実質的に水素化ホウ素ナトリウム
と水酸化ナトリウムの水溶液からなる慣用の還元剤と混
合される。これは、循環ポンプ２４１容器２５、容器２
５の底部とポンプ２４の吸込側の間に延びている導管２
６、ポンプ２４の加圧側と容器２５の間に延びている導
管２７および循環液体を望みの温度レベルに冷却するた
めの熱交換器２８を備えた再循環回路で実施される。亜
硫酸ナトリウム−重亜硫酸ナトリウム溶液はポンプ２９
を備えた導管３０を経て導管２７に供給され、−力還元
剤溶液はポンプ３２を備えた導管６３を経て貯蔵タンク
３１から導管２７に供給される。製造された亜ジチオン
酸ナトリウム溶液は客語２５中に備えられた余水路３４
を経て排出され、そして任意には導管３７を通って入っ
てくる水で希釈されたのち、導管６６を経て貯蔵タンク
５５に導かれる。製造された亜ジチオン酸溶液はポンプ
３８を備えた導管３９を経てタンク３５から需要家側に
運ばれる。The solution from tank 2 is mixed with a conventional reducing agent consisting essentially of an aqueous solution of sodium borohydride and sodium hydroxide. This includes the circulation pump 241 container 25, container 2
5 and the suction side of the pump 24
6. implemented in a recirculation circuit with a conduit 27 extending between the pressure side of the pump 24 and the vessel 25 and a heat exchanger 28 for cooling the circulating liquid to the desired temperature level. Sodium sulfite-sodium bisulfite solution pump 29
The power reducing agent solution is supplied from the storage tank 31 to the conduit 27 via a conduit 63 equipped with a pump 32. The produced sodium dithionite solution is passed through the spillway 34 provided in the passenger compartment 25.
and, optionally diluted with water entering through conduit 37, is directed to storage tank 55 via conduit 66. The produced dithionite solution is transported from the tank 35 to the consumer side via a conduit 39 equipped with a pump 38.
水素の生成による収率の損失を避けるために。To avoid yield loss due to hydrogen generation.
還元剤溶液および有利にはまた亜硫酸塩−重亜硫酸塩溶
液を回路２４〜２８中の循環液体に実質的に等速吸引的
に充填する。即ち供給される溶液が再循環溶液の流れ方
向および流速と実質的に一致する方向および流速で導管
２７中に導入されるのが非常に適切であることが見出さ
れた。The reducing agent solution and preferably also the sulfite-bisulfite solution are charged to the circulating liquid in the circuits 24 to 28 in a substantially isokinetic manner. It has thus been found to be very suitable for the supplied solution to be introduced into conduit 27 in a direction and flow rate that substantially corresponds to the flow direction and flow rate of the recycled solution.
この目的で導管３０および３５は下流に位置するノズル
４１を経て導管２７中に注ぎ込み、縦断面で示される導
管２７の一部４０から明らかなように、そこでは各導管
３０または３６は図示されているように分岐されること
ができ、各分岐はノズル４１と調節可能な弁４２を備え
ている。導管３６を経て循環系２４〜２８から出る溶液
は１例えば望ましくない金属汚染物質を分離するための
錯化剤およびまたｐ）４＃節添加剤と混合されることが
できる。For this purpose, the conduits 30 and 35 flow into the conduit 27 via a nozzle 41 located downstream, as can be seen from the part 40 of the conduit 27 shown in longitudinal section, in which each conduit 30 or 36 is not shown. Each branch is equipped with a nozzle 41 and an adjustable valve 42. The solution exiting the circulation system 24-28 via conduit 36 can be mixed with a complexing agent, for example for separating undesired metal contaminants, and also p) a section additive.
実施例 １
硫酸プラントからもたらされる二酸化イオウ含有排出ガ
ス用に適合させられた排出ガススフ２バーから得られた
亜硫酸塩十東亜硫酸塩濃度（Ｎａ２Ｏ＋８０２％で）３
９％および８０２／（８０２＋Ｎａ２Ｏ）比０．６３〜
０．６５を有する亜硫酸塩−重亜硫酸塩溶液が亜ジチオ
ン酸塩の製造用に適する組成物を製造するために液体二
酸化イオウおよび水と共に用いられた。Example 1 Sulphite Juto sulphite concentration (at Na2O+802%)3 obtained from an exhaust gas filter adapted for sulfur dioxide-containing exhaust gas coming from a sulfuric acid plant 2 bar
9% and 802/(802+Na2O) ratio 0.63~
A sulfite-bisulfite solution having a pH of 0.65 was used with liquid sulfur dioxide and water to produce a composition suitable for the production of dithionite.
上記の点から、液体二酸化イオウ４６８０ＡＩ’が加圧
空間に充填され、そしてＳ０２／（８０２＋Ｎａ２Ｏ）
比が０６４の５９係亜硫酸塩−重亜硫酸塩溶液２２．０
００＃および水７９，３２ＯＡｉ’が加えられて。From the above point, liquid sulfur dioxide 4680AI' is filled into the pressurized space and S02/(802+Na2O)
59th sulfite-bisulfite solution with a ratio of 064 22.0
00# and water 79,32OAi' were added.
０．７７５の８０２／（ＳＯ２＋Ｎａ２Ｏ）および１２
％の濃度となった。802/(SO2+Na2O) and 12 of 0.775
% concentration.
この溶液は大気圧に等しい圧力に維持されている貯蔵タ
ンクへと運ばれ、次いで亜ジチオン酸塩の製造用に直接
用いられた。そこでは還元剤混合物１例えば“ＢＯＲＯ
Ｌ■″の商品名でＶｅｎｔｒｏｎ社から販売されている
。 ＮａＢＨ４約１２重量％。This solution was transferred to a storage tank maintained at a pressure equal to atmospheric pressure and then used directly for the production of dithionite. There, a reducing agent mixture 1, for example "BORO
It is sold by Ventron under the trade name L■''. About 12% by weight of NaBH4.
ＮａＯＨ約４ＯＮ量チおよび水約４８重量係を含有する
還元剤を加えることのみが必要である。排出された亜ジ
チオン酸塩溶液は水で３重量優の濃度に希釈された。It is only necessary to add a reducing agent containing about 4 parts by weight of NaOH and about 48 parts by weight of water. The discharged dithionite solution was diluted with water to a concentration of just over 3 parts by weight.
実施例 ２
８０２／（ＳＯ２＋Ｎａ２Ｏ）比が０．６５の亜硫酸塩
−重亜硫酸塩溶液を用いた以外は実施例１を繰返した。Example 2 Example 1 was repeated except that a sulfite-bisulfite solution with an 802/(SO2+Na2O) ratio of 0.65 was used.
この場合、 ０．７７５という同じ値を得るように流
体二酸化イオウ４３３３＃および水７６．７５５鯉が加
えられた。In this case, fluid sulfur dioxide 4333# and water 76.755 were added to obtain the same value of 0.775.
実施例 ３
０．７９０の８０２／（ＳＯ２＋Ｎａ２Ｏ）比を有する
生成物を得るべ〈実施例１が繰返されそして実施例１に
おけるのと同じ亜硫酸塩−重亜硫酸塩溶液が用いられた
。したがってこの実施例では液体二酸化イオウ５７４１
ｋｇおよび水８５，６８４＃が亜硫酸塩−１に亜硫酸塩
的液２Ｏ，０００＃に加えられた。Example 3 A product with an 802/(SO2+Na2O) ratio of 0.790 was obtained. Example 1 was repeated and the same sulfite-bisulfite solution as in Example 1 was used. Therefore, in this example, liquid sulfur dioxide 5741
kg and 85,684 # of water were added to 20,000 # of sulfite solution to sulfite-1.
図面は本発明を災施するのに適するプラントの一例を示
す図である。
１・・・タンク車、２−）レージ、３・・・タンク。
７・・・閉鎖弁、８・・・側斜部材、９・・・拡大断面
導管部、１８・・・閉鎖弁、２Ｏ・・・貯蔵タンク、２
１・・・スクラバー、２５・・・容器％２８・・・熱交
換器。
３１・・・貯蔵タンク、３４・・・余水路、６５・・・
貯蔵タンク、４０・・・導管の一部、４１・・・ノズル
。
４２・・・弁。
＝１５−The drawing shows an example of a plant suitable for implementing the present invention. 1... Tank car, 2-) Rage, 3... Tank. 7... Closing valve, 8... Side diagonal member, 9... Enlarged cross section conduit section, 18... Closing valve, 2O... Storage tank, 2
1...Scrubber, 25...Container%28...Heat exchanger. 31... Storage tank, 34... Spillway, 65...
Storage tank, 40... Part of conduit, 41... Nozzle. 42... Valve. =15-
Claims (1)
との再循環水溶液に二酸化イオウを二酸化イオウ対二酸
化イオウと酸化ナトリウムの合計との比が０．６１〜０
．６６になるように接触させ、生成した混合物を加圧し
、そしてそれに二酸化イオウ対二酸化イオウと酸化ナト
リウムの合計との比が０．７５〜０．８１になるように
液体二酸化イオウを導入し、そして１０〜１３重量％の
ＳＯ＿２＋Ｎａ＿２Ｏ濃度になるように水の含有量を調
節することを特徴とする亜ジチオン酸ナトリウムの製造
に用い得る組成物の製造方法。 ２）上流は再循環ポンプで規制され下流は締めつけ手段
で期制されている再循環ループの加圧部分で上記の混合
物に液体二酸化イオウとまた任意に希釈水が供給される
特許請求の範囲第１項記載の製造方法。 ３）二酸化イオウが水酸化ナトリウムと予じめ吸収され
た二酸化イオウとの再循環水溶液に、二酸化イオウ対二
酸化イオウと酸化ナトリウムの合計との比が０．６３〜
０．６５になるように系を加圧する前に加えられる特許
請求の範囲第１項記載の製造方法。 ４）液体二酸化イオウを上記加圧された混合物中に二酸
化イオウ対二酸化イオウと酸化ナトリウムの合計との比
が約０．７８になるように導入する特許請求の範囲第１
項記載の製造方法。 ５）二酸化イオウと酸化ナトリウムの濃度が約１２重量
％になるように水の含有量を調節する特許請求の範囲第
１項記載の製造方法。 ６）還元剤を回路中で再循環している組成物と等速吸引
的に混合することにより亜ジチオン酸塩を製造するため
の特許請求の範囲第１項により製造された組成物の使用
。[Scope of Claims] 1) Sulfur dioxide is added to a recycled aqueous solution of sodium hydroxide and preabsorbed sulfur dioxide in a ratio of sulfur dioxide to the sum of sulfur dioxide and sodium oxide of 0.61 to 0.
．． 66, pressurize the resulting mixture, and introduce liquid sulfur dioxide into it such that the ratio of sulfur dioxide to the sum of sulfur dioxide and sodium oxide is between 0.75 and 0.81, and A method for producing a composition that can be used for producing sodium dithionite, comprising adjusting the water content so that the SO_2+Na_2O concentration is 10 to 13% by weight. 2) Liquid sulfur dioxide and optionally dilution water are supplied to said mixture in a pressurized section of the recirculation loop, regulated upstream by a recirculation pump and downstream by clamping means. The manufacturing method according to item 1. 3) Sulfur dioxide is added to the recycled aqueous solution of sodium hydroxide and pre-absorbed sulfur dioxide with a ratio of sulfur dioxide to the sum of sulfur dioxide and sodium oxide of 0.63 to
The manufacturing method according to claim 1, wherein the amount is added before pressurizing the system to a pressure of 0.65. 4) Liquid sulfur dioxide is introduced into the pressurized mixture such that the ratio of sulfur dioxide to the sum of sulfur dioxide and sodium oxide is about 0.78.
Manufacturing method described in section. 5) The manufacturing method according to claim 1, wherein the water content is adjusted so that the concentration of sulfur dioxide and sodium oxide is about 12% by weight. 6) Use of a composition prepared according to claim 1 for the preparation of dithionite by isokinetically admixing the reducing agent with the composition being recycled in the circuit.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8304825A SE446720B (en) | 1983-09-08 | 1983-09-08 | Method for producing compositions used in sodium dithionite production and the use thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63117901A true JPS63117901A (en) | 1988-05-21 |
| JPH0747483B2 JPH0747483B2 (en) | 1995-05-24 |
Family
ID=20352414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61262892A Expired - Fee Related JPH0747483B2 (en) | 1983-09-08 | 1986-11-06 | Process for producing composition usable for producing sodium dithionite |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPH0747483B2 (en) |
| FI (1) | FI74452C (en) |
| NO (1) | NO162276C (en) |
| SE (1) | SE446720B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4680136A (en) * | 1985-05-07 | 1987-07-14 | Stora Kopparbergs Bergslags Ab | Method for preparing compositions which can be used in the production of sodium dithionite; and the use of such compositions |
-
1983
- 1983-09-08 SE SE8304825A patent/SE446720B/en not_active IP Right Cessation
-
1984
- 1984-09-06 FI FI843490A patent/FI74452C/en not_active IP Right Cessation
- 1984-09-07 NO NO843566A patent/NO162276C/en not_active IP Right Cessation
-
1986
- 1986-11-06 JP JP61262892A patent/JPH0747483B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| SE446720B (en) | 1986-10-06 |
| FI843490A (en) | 1985-03-09 |
| NO162276B (en) | 1989-08-28 |
| SE8304825L (en) | 1985-03-09 |
| JPH0747483B2 (en) | 1995-05-24 |
| NO843566L (en) | 1985-03-11 |
| SE8304825D0 (en) | 1983-09-08 |
| FI74452C (en) | 1988-02-08 |
| FI74452B (en) | 1987-10-30 |
| FI843490A0 (en) | 1984-09-06 |
| NO162276C (en) | 1989-12-06 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |