JPS6148428A - Process and apparatus for preparing aqueous solution of sodium carbonate - Google Patents
Process and apparatus for preparing aqueous solution of sodium carbonateInfo
- Publication number
- JPS6148428A JPS6148428A JP16862484A JP16862484A JPS6148428A JP S6148428 A JPS6148428 A JP S6148428A JP 16862484 A JP16862484 A JP 16862484A JP 16862484 A JP16862484 A JP 16862484A JP S6148428 A JPS6148428 A JP S6148428A
- Authority
- JP
- Japan
- Prior art keywords
- sodium hydroxide
- tank
- aqueous solution
- carbon dioxide
- reaction
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/18—Stationary reactors having moving elements inside
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
- B01J19/0066—Stirrers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00051—Controlling the temperature
- B01J2219/00074—Controlling the temperature by indirect heating or cooling employing heat exchange fluids
- B01J2219/00105—Controlling the temperature by indirect heating or cooling employing heat exchange fluids part or all of the reactants being heated or cooled outside the reactor while recycling
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、水酸化ナトリウムと炭酸ガスとを反応させて
炭酸ナトリウム水溶液を得、る製造法及びその製造装置
に関するもので、特に炭酸ナトリウム水溶液を使用する
各種工業的処理系中に用いられる高純度の炭酸ナトリウ
ム水溶液を直接的に得ることができる製造法及びその製
造装置に関するものである。Detailed Description of the Invention (Industrial Application Field) The present invention relates to a manufacturing method and apparatus for producing a sodium carbonate aqueous solution by reacting sodium hydroxide with carbon dioxide gas, and particularly relates to a manufacturing method and apparatus for producing a sodium carbonate aqueous solution. The present invention relates to a production method and an apparatus for producing the same, which can directly obtain a high-purity aqueous sodium carbonate solution used in various industrial processing systems that use sodium carbonate.
（従来技術）
水酸化ナトリウムと炭酸ガスとを反応させて炭酸ナトリ
ウムを得る技術としては、例えば固体の炭酸ナトリウム
の存在下に水酸化ナトリウムと炭酸ガスを、８０℃ない
し１１５℃の温度において攪 することにより反応させ
て炭酸水素ナトリウムを生成し、炭酸水素ナトリウムの
懸濁液中に１１．３ないし１１．５のｐＨ値を維持させ
、懸濁液を遠心分離することにより母液分と結晶とに分
離し、結晶を乾燥させることにより炭酸ナトリウムの一
水和物を得る方法（特公昭４６−３５６０３号）や、ナ
トリウムアマルガムを炭酸水素ナトリウム水溶液と反応
させて炭酸ナトリウム及び水酸化ナトリウムを含有する
溶液を生成し、炭酸ナトリウム及び水酸化ナトリウムを
含有する溶液を炭酸ガスで処理して炭酸水素ナトリウム
を沈澱させ、この沈澱物を炭酸水素す） １７ウムと炭
酸水素ナトリウムを含有する母液とに分離し、炭酸水素
ナトリウムを力焼して炭酸ナトリフムを得る方法（特公
昭４６−１４８２０号）が知られている。(Prior art) As a technique for obtaining sodium carbonate by reacting sodium hydroxide and carbon dioxide gas, for example, sodium hydroxide and carbon dioxide gas are stirred at a temperature of 80°C to 115°C in the presence of solid sodium carbonate. By reacting to produce sodium bicarbonate, maintaining a pH value of 11.3 to 11.5 in the suspension of sodium bicarbonate, and centrifuging the suspension to separate the mother liquor and the crystals. A method of obtaining sodium carbonate monohydrate by separating and drying the crystals (Japanese Patent Publication No. 46-35603), and a method of reacting sodium amalgam with an aqueous solution of sodium bicarbonate to obtain a solution containing sodium carbonate and sodium hydroxide. The solution containing sodium carbonate and sodium hydroxide is treated with carbon dioxide gas to precipitate sodium hydrogen carbonate, and the precipitate is separated into a mother liquor containing 17 um of hydrogen carbonate and sodium hydrogen carbonate. A method of obtaining sodium carbonate by calcining sodium bicarbonate (Japanese Patent Publication No. 14820/1982) is known.
（発明が解決しようとする問題点）
工業的製造法においては水酸化す） ｌ／ウムに炭酸ガ
スを連続的に供給して反応させることになるが、反応系
中に水酸化ナトリウム・炭酸ナトリウム及び炭酸水素ナ
トリウムが混在しているため、高純度の炭酸ナトリウム
を水溶液の状態で取り出すことはできなかった。そこで
、上述の従来法で゛はいずれも一旦炭酸水素ナトリウム
を生成し、炭酸水素ナトリフムの混合水溶液を冷却して
結晶を生長させた後に、炭酸水素ナトリウムの結晶を分
離し、しかる後に力焼して炭酸水素ナトリウムを分解す
る必要があり、製造工程が複雑であるうえ、装置も大が
かりであるうえ、炭酸ナトリウムを固体でしか取り出せ
ないという問題があった。(Problem to be solved by the invention) In the industrial production method, carbon dioxide gas is continuously supplied to l/ium to react, but sodium hydroxide and sodium carbonate are present in the reaction system. and sodium bicarbonate, it was not possible to extract highly pure sodium carbonate in the form of an aqueous solution. Therefore, in all of the conventional methods described above, sodium bicarbonate is first generated, the mixed aqueous solution of sodium bicarbonate is cooled to grow crystals, the sodium bicarbonate crystals are separated, and then the sodium bicarbonate crystals are force calcined. It is necessary to decompose the sodium hydrogen carbonate using a method, which makes the manufacturing process complicated, requires large-scale equipment, and has the problem that sodium carbonate can only be extracted in solid form.
また、上述の従来方法を実施する装置においては、反応
槽に貯留させている水酸化ナトリウム水溶液中へ炭酸ガ
スの気泡を吹き込み、吋し、水酸化ナトリウムと炭酸ガ
スとを接触させ化学反応を起こさせている。しかし、シ
ェアーの弱い攪拌機による攪営のため水酸化ナトリウム
と炭酸ガスとの接触効率が比較的低く、化学反応が不均
一とならざるを得す、炭酸水素ナトリウムが生成し、短
時間に高純度の炭酸ナトリウム水溶液を得ることができ
ないという欠点があった。In addition, in an apparatus that implements the conventional method described above, bubbles of carbon dioxide gas are blown into an aqueous sodium hydroxide solution stored in a reaction tank, and the sodium hydroxide and carbon dioxide gas are brought into contact with each other to cause a chemical reaction. I'm letting you do it. However, because the agitation is performed using a stirrer with a weak shear, the contact efficiency between sodium hydroxide and carbon dioxide gas is relatively low, and the chemical reaction is forced to be non-uniform. The disadvantage was that it was not possible to obtain an aqueous solution of sodium carbonate.
（問題点を解決するための手段）
本発明は水酸化す） ＋７ウムに炭酸がスを直接作用さ
せることにより、高純度の炭酸ナトリウムの水溶液を直
接的に得ることができる製造法及びその製造装置を提供
するものである。(Means for Solving the Problems) The present invention provides a method for directly obtaining a highly pure aqueous solution of sodium carbonate by directly causing carbonate to act on +7 um, and its production. It provides equipment.
即ち、水酸化す） ＩＪウム水溶液槽内の溶液を水酸化
ナトリウム水溶液槽と反応槽との間で循環させ、反応槽
内に炭酸ガスを連続的に吹込むことにより水酸化ナトリ
ウムと炭酸ガスとを反応させて炭酸ナトリウムを生成さ
せ、この炭酸ナトリウムと未反応の水酸化ナトリウム水
溶液との混合液を水酸化ナトリウム水溶液槽と反応槽と
の間で循環させ、循環液のｐＨ値を１１．５〜１２．３
の範囲内に制御するようにしたことを特徴としたもので
ある。In other words, the solution in the IJum aqueous solution tank is circulated between the sodium hydroxide aqueous solution tank and the reaction tank, and carbon dioxide gas is continuously blown into the reaction tank to convert sodium hydroxide and carbon dioxide gas. The mixture of sodium carbonate and unreacted sodium hydroxide aqueous solution is circulated between the sodium hydroxide aqueous solution tank and the reaction tank, and the pH value of the circulating liquid is adjusted to 11.5. ~12.3
It is characterized by being controlled within the range of .
ここで水酸化ナトリウム水溶液槽と反応槽との間で循環
させる循環液のｐＨ値としては１１．５〜１２．３の範
囲にしなければならない。ｐＨ値が１１．５以下の場合
には、水酸化ナトリウムと炭酸ガスとの反応が行過ぎ、
炭酸水素す） ＩＪウムが生成し好なしくない。一方ｐ
Ｈ値が１２．３以上の場合には未反応の水酸化ナトリウ
ムの量が多くなり、本発明の目的物である高純度の炭酸
す） ＩＪウム水溶液を得ることが出来ない。Here, the pH value of the circulating liquid circulated between the sodium hydroxide aqueous solution tank and the reaction tank must be in the range of 11.5 to 12.3. If the pH value is less than 11.5, the reaction between sodium hydroxide and carbon dioxide gas will be excessive,
(Hydrogen carbonate) IJium is generated, which is not a good thing. On the other hand p
When the H value is 12.3 or more, the amount of unreacted sodium hydroxide increases, making it impossible to obtain a highly purified IJ carbonate aqueous solution, which is the object of the present invention.
また、上述の方法を最も効率良く実施することができる
装置として、その装置を反応物取出路と炭酸ガス注入管
とを備えた密閉式反応槽と製品取出路と水酸化ナトリウ
ム導出路とを備えた水酸化ナトリウム水溶液槽とからな
り、前記反応槽の両側壁間に亘って装着した液体跳ね上
げ用攪 翼を固定した回転軸を回転させる為の駆動機構
を接続し、さらに前記反応槽と前記水酸化す） ｌ）ラ
ム水溶液槽とを前記反応物取出路及び前記水酸化ナトリ
ウム導出路により連結し、且つ、水酸化す） ＩＪウム
導出路に送出ポンプを接続して反応槽での反応生成物で
ある炭酸ナトリウムと未反応の水酸化ナトリウム水溶液
との混合液を水酸化ナトリウム水溶液槽と反応槽との間
で循環可能にし、水酸化す） ＩＪウム水溶液槽に付設
したｐＨ計で検出される前記混合液のｐＨ値によって炭
酸ガスの供給量を制御することにより炭酸がスへの転化
率を調節可能としたことを特徴としている。In addition, as an apparatus that can carry out the above method most efficiently, the apparatus is equipped with a closed reaction tank equipped with a reactant extraction passage and a carbon dioxide gas injection pipe, a product extraction passage and a sodium hydroxide extraction passage. A drive mechanism is connected to rotate a rotary shaft to which a stirring blade for splashing liquid attached between both side walls of the reaction tank is fixed, and a drive mechanism is connected between the reaction tank and the l) Connect the ram aqueous solution tank through the reactant take-out path and the sodium hydroxide outlet path, and connect a delivery pump to the sodium hydroxide outlet path to generate reaction in the reaction tank. A mixture of sodium carbonate and unreacted sodium hydroxide aqueous solution is circulated between the sodium hydroxide aqueous solution tank and the reaction tank, and hydroxide is detected by the pH meter attached to the IJium aqueous solution tank. The present invention is characterized in that the conversion rate of carbonic acid to sulfur can be adjusted by controlling the amount of carbon dioxide gas supplied depending on the pH value of the mixed liquid.
（作用）
水酸化ナトリウムに炭酸ガスを作用させた場合には、次
の二種の反応が生じ、炭酸ナトリウムと炭酸水素ナトリ
ウムが生成される。(Function) When carbon dioxide gas acts on sodium hydroxide, the following two reactions occur, producing sodium carbonate and sodium hydrogen carbonate.
１２Ｎ３゜Ｈ＋。。２−ｐ’Ｊ １１ｔ。。、＋Ｉ−Ｌ
。、（１）ＮａｚＣＯｓ＋ＣＯ２＋Ｈ２０−＋２ Ｎ
ａＨＣ○、 ・ （２）ところで、水酸化ナトリウム
に炭酸ガスを連続的に供給していく工業的製造において
は、（１）式による反応生成物である炭酸ナトリウムと
炭酸ガスとが反応して炭酸水素ナトリウムが生じるので
あるが、本願発明にあっては、スプラッシャ一式の反応
槽に水酸化す） ＩＪウムと炭酸ガスとを供給し、水酸
化ナトリウム水溶液の飛沫と炭酸ガスとを接触させるこ
とにより両者を急速に反応させ、反応槽から導出した生
成物である炭酸ナトリウムと未反応溶液との混合液を、
水酸化す） ＋７ウム水溶液槽と反応槽との間で循環さ
せ、循環する混合液のｐＨ値を１１．５〜１２．３の範
囲内に制御していることから、その反応系で（２）式の
反応による炭酸水素ナトリウムが生成されることがな（
、（１）式の反応のみで高純度の炭酸ナトリウム水溶液
を生成する。12N3°H+. . 2-p'J 11t. . ,+IL
. , (1) NazCOs+CO2+H20-+2N
aHC○, ・ (2) By the way, in industrial production in which carbon dioxide gas is continuously supplied to sodium hydroxide, sodium carbonate, which is a reaction product according to equation (1), reacts with carbon dioxide gas to form carbon dioxide. Sodium hydrogen is produced, but in the present invention, by supplying IJium and carbon dioxide gas to a reaction tank with a set of splashers, and bringing the splashes of an aqueous sodium hydroxide solution into contact with the carbon dioxide gas. The mixture of sodium carbonate and the unreacted solution, which is the product extracted from the reaction tank, is rapidly reacted with the unreacted solution.
Since the pH value of the circulating mixed solution is controlled within the range of 11.5 to 12.3 by circulating between the +7 um aqueous solution tank and the reaction tank, the reaction system ) Sodium hydrogen carbonate is not produced by the reaction of equation (
, a highly pure aqueous sodium carbonate solution is produced only by the reaction of equation (1).
（実施例） 以下本発明の実施例を図面に基づき説明する。(Example) Embodiments of the present invention will be described below based on the drawings.
第１図は本発明を実施する装置の概略構成図を示し、（
１）はステンレス鋼製の反応槽、（２）は水酸化ナトリ
ウム水溶液槽、（３）は炭酸ガスのアキュムレータであ
１）、反応槽（１）の両側壁（４）・（４）開に亘って
装着された回転軸（５）に液体跳上げ用攪祈翼（６）が
固定されている。炭酸ガスアキュムレータ（３）と反応
槽（１）は炭酸ガス注入管（７）で連結されており、炭
酸ガスアキュムレータ（３）へのガス導入路（８）中に
電磁弁（９）が配置しである。FIG. 1 shows a schematic configuration diagram of an apparatus for implementing the present invention, and (
1) is a stainless steel reaction tank, (2) is a sodium hydroxide aqueous solution tank, and (3) is a carbon dioxide gas accumulator. A stirring blade (6) for splashing liquid is fixed to a rotating shaft (5) mounted over the entire body. The carbon dioxide gas accumulator (3) and the reaction tank (1) are connected by a carbon dioxide gas injection pipe (7), and a solenoid valve (9) is arranged in the gas introduction path (8) to the carbon dioxide gas accumulator (3). It is.
水酸化ナトリウム水溶液、！（２）内には冷却用コイル
（１０）と攪拌翼（１１）とが配置され、水酸化ナトリ
ウム水溶液槽（２）から導出した水酸化ナトリウム導出
路（１２）を反応槽（１）に連結し、この水酸化ナトリ
ウム導出路（１２）中に送出ポンプ（１３）を位置させ
、反応槽（１）から導出した反応物取出路（１４）の先
端部を水酸化ナトリウム水溶液槽（２）の液面下に突入
させである。Sodium hydroxide solution! A cooling coil (10) and a stirring blade (11) are arranged inside (2), and the sodium hydroxide outlet path (12) led out from the sodium hydroxide aqueous solution tank (2) is connected to the reaction tank (1). Then, a delivery pump (13) is located in this sodium hydroxide outlet channel (12), and the tip of the reactant outlet channel (14) led out from the reaction tank (1) is connected to the sodium hydroxide aqueous solution tank (2). It is plunged below the liquid surface.
第１図中押号（１５）は反応槽（１）内の圧力を検知し
てガス導入路（８）中の電磁弁（９）の回置調節信号を
発する圧力開閉器、（１６）は反応器（１）内圧力が負
圧になった際に外気を反応器（１）内に吸入する負圧安
全器、（１７）は水酸化す） ＩＪウム水溶液槽（２）
に付設したｐＨ計、（１８）は反応器（１）の回転軸（
５）を駆動する電動モータ、（１９）は炭酸ガス供給源
、（２０）は反応器（１）の底部から常時連通状に導出
したバイパス路で、このバイパス路（２０）は反応物取
出路（１４）よりも遥かに小径に形成され、その途中部
を透明管（２１）で形成しである。また、水酸化ナトリ
ウム水溶液槽（２）の底部から製品取出路（２２）が分
岐導出しである。The number (15) in Fig. 1 is a pressure switch that detects the pressure inside the reaction tank (1) and issues a rotation adjustment signal for the solenoid valve (9) in the gas introduction path (8). Negative pressure safety device that sucks outside air into the reactor (1) when the internal pressure of the reactor (1) becomes negative; (17) is for hydroxide) IJum aqueous solution tank (2)
The pH meter (18) attached to the reactor (1) is connected to the rotating shaft (
5), (19) is a carbon dioxide gas supply source, (20) is a bypass path led out from the bottom of the reactor (1) in a continuous manner, and this bypass path (20) is a reactant extraction path. It is formed to have a much smaller diameter than (14), and a transparent tube (21) is formed in the middle. Moreover, the product take-out path (22) is a branch lead-out from the bottom of the sodium hydroxide aqueous solution tank (2).
尚、反応槽（１）としては水酸化ナトリウム水溶液を気
中に分散させる機構を備えているものであれば使用でと
る。Incidentally, the reaction tank (1) may be any one equipped with a mechanism for dispersing the sodium hydroxide aqueous solution in the air.
次に上述の装置を用いての本発明方法の実施例を説明す
る。Next, an example of the method of the present invention using the above-mentioned apparatus will be described.
水酸化ナトリウム水溶液槽（２）内に６規定の水酸化ナ
トリウム水溶液を４００リツトル貯留し、この水酸化ナ
トリウム水溶液を１２リツトル／Ｔａ１ｎの能力を有す
る送出ポンプ（１３）で、常時３４．５リツトルの水酸
化ナトリウム溶液が滞留するように設計した反応槽（１
）に送込み、オーバー７０−した液は水酸化ナトリウム
槽（２）に戻される。反応槽（１）に５ｍｍＨｚＯの圧
力に調整された炭酸ガスを吹込むことにより、反応ｆｆ
（１）内で銚ね上げ形成された水酸化す） ＩＪウム水
溶液の飛沫に炭酸がスを作用させて、炭酸ガスと水酸化
ナトリウム水溶液とを反応させ、反応槽（１）からオー
バーフローすることにより流出する反応物混合液を水酸
化す） ＩＪウム水溶液槽（２）に案内し、反応１７！
１（１）に送り込む混合液のｐＨ値をｐＨ計（１７）で
検出し、このｐＨ値が所定値に達すると、炭酸〃ス導入
路（８）の電磁弁（９）を閉止するとともに、攪 翼部
動用の電動モータ（１８）を停止して反応を終了する。400 liters of 6N sodium hydroxide aqueous solution is stored in the sodium hydroxide aqueous solution tank (2), and this sodium hydroxide aqueous solution is constantly pumped to 34.5 liters using a delivery pump (13) having a capacity of 12 liters/Ta1n. A reaction tank (1
), and the over 70-mL liquid is returned to the sodium hydroxide tank (2). By blowing carbon dioxide gas adjusted to a pressure of 5 mmHz into the reaction tank (1), the reaction ff
(1) The hydroxide gas formed in the reaction tank (1) is caused to act on the droplets of the IJium aqueous solution to cause the carbon dioxide gas to react with the sodium hydroxide aqueous solution, which overflows from the reaction tank (1). The reactant mixture flowing out is hydroxylated) and guided to the IJum aqueous solution tank (2), where reaction 17!
1 (1) is detected with a pH meter (17), and when this pH value reaches a predetermined value, the solenoid valve (9) of the carbon dioxide introduction path (8) is closed, The electric motor (18) for moving the stirring blade is stopped to complete the reaction.
なお、炭酸ガスと水酸化ナトリウムとの反応により生ず
る反応熱で反応槽（１）内の液温か上昇するのを防止す
るため、水酸化ナトリウム水溶液槽（２）内に配置した
冷却コイル（１０）に冷却水を流し、水酸化ナトリウム
槽（２）内での液温な４０〜５０°Ｃとなるように調節
した。In addition, in order to prevent the temperature of the liquid in the reaction tank (1) from rising due to the reaction heat generated by the reaction between carbon dioxide gas and sodium hydroxide, a cooling coil (10) is placed in the sodium hydroxide aqueous solution tank (2). Cooling water was poured into the tank to adjust the temperature of the liquid in the sodium hydroxide tank (2) to 40 to 50°C.
そして、循環液のｐＨ値をｐＨ計（１７）で監視しな卿
がら運転した結果、第２図に示すように、運転開始２時
間後にはｐＨ１３，８、炭酸ナトリウムへの転化率４９
％、運転開始３時間５０分後にはｐＨ１２゜０８、炭酸
ナトリウムへの転化率９９％の６規定の炭酸ナトリウム
溶液が生成できた。As a result of operation while monitoring the pH value of the circulating fluid with a pH meter (17), as shown in Figure 2, two hours after the start of operation, the pH was 13.8, and the conversion rate to sodium carbonate was 49.
%, and 3 hours and 50 minutes after the start of operation, a 6N sodium carbonate solution with a pH of 12.08 and a conversion rate of 99% to sodium carbonate was produced.
そして、ｐＨ値を１１．５〜１２．３の範囲に制御する
と、炭酸ナトリウムへの転化率を９７％以上にすること
ができる。When the pH value is controlled within the range of 11.5 to 12.3, the conversion rate to sodium carbonate can be increased to 97% or more.
（効果）
以上説明した通りの本発明の炭酸ナトリウム水溶液の製
造法及びその装置を用いるにあたって、反応槽に水酸化
ナトリウムと炭酸ガスとを供給し、反応槽での反応生成
物である炭酸ナトリウムと未反応の水酸化ナトリウム水
溶液との混合液を水酸化ナトリウム水溶液槽に導入し、
炭酸ナトリウムと未反応の水酸化ナトリウム水溶液との
混合液をｐＨ値監視のらとに循環させているので、炭酸
水素ナトリウムを含まない高純度の炭酸ナトリウムを直
接水溶液の状態で取出すことができる。これにより、結
晶と母液とを分離した後、力焼することにより炭酸ナト
リウムを固体で得ていた従来の方法と異なり、分離装置
や力焼装置を要せず、製造装置全体を簡素化することが
で外るうえ、製造工程も簡略化できるので、設備費を大
幅に低減でき、製造コストを低減することができ、本発
明の装置は炭酸ナトリウム水溶液の工業的製造装置とし
て最適である。(Effects) When using the method and apparatus for producing an aqueous sodium carbonate solution of the present invention as explained above, sodium hydroxide and carbon dioxide gas are supplied to a reaction tank, and sodium carbonate, which is a reaction product in the reaction tank, is Introducing the mixture with unreacted sodium hydroxide aqueous solution into a sodium hydroxide aqueous solution tank,
Since the mixed solution of sodium carbonate and unreacted sodium hydroxide aqueous solution is circulated through the pH value monitor, high purity sodium carbonate containing no sodium bicarbonate can be taken out directly in the form of an aqueous solution. Unlike the conventional method in which sodium carbonate is obtained in solid form by separating the crystals and mother liquor and then calcining them, this method does not require a separation device or a calcining device, simplifying the entire manufacturing equipment. In addition to this, the manufacturing process can be simplified, so equipment costs can be significantly reduced, and manufacturing costs can be reduced, making the apparatus of the present invention optimal as an industrial manufacturing apparatus for an aqueous sodium carbonate solution.
第１図は本発明方法を実施する装置の一例を示す概略構
成図、第２図は実施例の運転時間と混合液のｐＨ値との
関係を示す図である。
１・・・反応槽、２・・・水酸化ナトリウム水溶液槽、
４・・・反応槽の側壁、 ５・・・回転軸、 ６・・・
−翼、７・・・炭酸〃ス注入管、１２・・・水酸化す）
＋７ウム導出路、１３・・・送出ポンプ、１４・・・
反応物取出路、１７・・・ｐＨ計、２２・・・製品取出
路特許畠願人 岩谷産業株式会社
同 戸田工業株式会社FIG. 1 is a schematic configuration diagram showing an example of an apparatus for implementing the method of the present invention, and FIG. 2 is a diagram showing the relationship between the operating time and the pH value of the mixed liquid in the example. 1... Reaction tank, 2... Sodium hydroxide aqueous solution tank,
4... Side wall of the reaction tank, 5... Rotating shaft, 6...
- blades, 7... carbon dioxide injection pipe, 12... hydroxide)
+7 um outlet path, 13... delivery pump, 14...
Reactant outlet path, 17... pH meter, 22... Product outlet path Patent applicant Iwatani Sangyo Co., Ltd. Toda Kogyo Co., Ltd.
Claims (1)
トリウムを得る製造法において、反応槽に水酸化ナトリ
ウム水溶液槽から水酸化ナトリウムを供給するとともに
、炭酸ガスを連続的に吹き込み、反応槽内で水酸化ナト
リウムと炭酸ガスとを反応させて炭酸ナトリウムを生成
させ、この炭酸ナトリウムを水酸化ナトリウム水溶液槽
に案内し、炭酸ナトリウムを水酸化ナトリウム水溶液と
ともに水酸化ナトリウム水溶液槽と反応槽との間で循環
させ、循環液のｐＨ値を１１．５〜１２．３内に制御す
ることにより、高純度炭酸ナトリウム水溶液を得るよう
にしたことを特徴とする炭酸ナトリウム水溶液の製造法 ２、反応物取出路と炭酸ガス注入管とを備えた密閉式反
応槽と製品取出路と水酸化ナトリウム導出路とを備えた
水酸化ナトリウム水溶液槽とからなり、前記反応槽の両
側壁間に亘って装着した液体跳ね上げ用攪拌翼を固定し
た回転軸を回転させる為の駆動機構を接続し、さらに前
記反応槽と前記水酸化ナトリウム水溶液槽とを前記反応
物取出路及び前記水酸化ナトリウム導出路により連結し
、且つ、水酸化ナトリウム導出路に送出ポンプを接続し
て反応槽での反応生成物である炭酸ナトリウムと未反応
の水酸化ナトリウム水溶液との混合液を水酸化ナトリウ
ム水溶液槽と反応槽との間で循環可能にし、水酸化ナト
リウム水溶液槽に付設したｐＨ計で検出される前記混合
液のｐＨ値によって炭酸ガスの供給量を制御することに
より炭酸ガスへの転化率を調節可能としたことを特徴と
する炭酸ナトリウム水溶液の製造装置[Claims] 1. In a manufacturing method for producing sodium carbonate by reacting sodium hydroxide and carbon dioxide gas, sodium hydroxide is supplied to the reaction tank from an aqueous sodium hydroxide solution tank, and carbon dioxide gas is continuously supplied to the reaction tank. The sodium hydroxide is reacted with carbon dioxide gas in the reaction tank to produce sodium carbonate, and the sodium carbonate is introduced into the sodium hydroxide aqueous solution tank, and the sodium carbonate and the sodium hydroxide aqueous solution are mixed into the sodium hydroxide aqueous solution tank. A method for producing an aqueous sodium carbonate solution, characterized in that a high purity aqueous sodium carbonate solution is obtained by circulating the solution between the reaction tank and controlling the pH value of the circulating liquid within 11.5 to 12.3. 2. It consists of a closed reaction tank equipped with a reactant take-out path and a carbon dioxide gas injection pipe, and a sodium hydroxide aqueous solution tank equipped with a product take-out path and a sodium hydroxide lead-out path, and between both side walls of the reaction tank. A drive mechanism for rotating a rotary shaft to which a stirring blade for splashing liquid attached is fixed is connected, and the reaction tank and the sodium hydroxide aqueous solution tank are connected to the reactant take-out path and the sodium hydroxide outlet. The mixture of sodium carbonate, which is a reaction product in the reaction tank, and unreacted sodium hydroxide aqueous solution is reacted with the sodium hydroxide aqueous solution tank by connecting a delivery pump to the sodium hydroxide outlet path. The conversion rate to carbon dioxide gas can be adjusted by controlling the supply amount of carbon dioxide gas according to the pH value of the mixed liquid detected by a pH meter attached to the sodium hydroxide aqueous solution tank. An apparatus for producing an aqueous sodium carbonate solution characterized by the following features:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16862484A JPS6148428A (en) | 1984-08-11 | 1984-08-11 | Process and apparatus for preparing aqueous solution of sodium carbonate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16862484A JPS6148428A (en) | 1984-08-11 | 1984-08-11 | Process and apparatus for preparing aqueous solution of sodium carbonate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6148428A true JPS6148428A (en) | 1986-03-10 |
Family
ID=15871505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16862484A Pending JPS6148428A (en) | 1984-08-11 | 1984-08-11 | Process and apparatus for preparing aqueous solution of sodium carbonate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6148428A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007144973A1 (en) * | 2006-06-16 | 2007-12-21 | Tsurumi Soda Co., Ltd. | Method for purification of alkali metal carbonate solutions, purification apparatus and alkali metal carbonate solutions |
| JP6783436B1 (en) * | 2019-08-29 | 2020-11-11 | 健司 反町 | Carbon dioxide fixation method, immobilization carbon dioxide production method, and immobilization carbon dioxide production equipment |
| JP6788162B1 (en) * | 2019-12-10 | 2020-11-25 | 健司 反町 | Carbon dioxide fixation device |
| JP2021030229A (en) * | 2020-09-30 | 2021-03-01 | 健司 反町 | Carbon dioxide fixing method, method for producing fixed carbon dioxide, and device for producing fixed carbon dioxide |
-
1984
- 1984-08-11 JP JP16862484A patent/JPS6148428A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007144973A1 (en) * | 2006-06-16 | 2007-12-21 | Tsurumi Soda Co., Ltd. | Method for purification of alkali metal carbonate solutions, purification apparatus and alkali metal carbonate solutions |
| JP2007331993A (en) * | 2006-06-16 | 2007-12-27 | Tsurumi Soda Co Ltd | Method for purifying alkali metal carbonate solution, purification apparatus, and alkali metal carbonate solution |
| JP6783436B1 (en) * | 2019-08-29 | 2020-11-11 | 健司 反町 | Carbon dioxide fixation method, immobilization carbon dioxide production method, and immobilization carbon dioxide production equipment |
| WO2021038808A1 (en) * | 2019-08-29 | 2021-03-04 | 健司 反町 | Method for fixing carbon dioxide, method for producing fixed carbon dioxide, and device for producing fixed carbon dioxide |
| US11305228B2 (en) | 2019-08-29 | 2022-04-19 | Kenji SORIMACHI | Method for fixing carbon dioxide, method for producing fixed carbon dioxide, and fixed carbon dioxide production apparatus |
| JP6788162B1 (en) * | 2019-12-10 | 2020-11-25 | 健司 反町 | Carbon dioxide fixation device |
| JP2021030229A (en) * | 2020-09-30 | 2021-03-01 | 健司 反町 | Carbon dioxide fixing method, method for producing fixed carbon dioxide, and device for producing fixed carbon dioxide |
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