JPS6036324A - Preparation of sodium carbonate - Google Patents
Preparation of sodium carbonateInfo
- Publication number
- JPS6036324A JPS6036324A JP14377283A JP14377283A JPS6036324A JP S6036324 A JPS6036324 A JP S6036324A JP 14377283 A JP14377283 A JP 14377283A JP 14377283 A JP14377283 A JP 14377283A JP S6036324 A JPS6036324 A JP S6036324A
- Authority
- JP
- Japan
- Prior art keywords
- sodium carbonate
- water
- specific gravity
- na2co3
- blend
- 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
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- Detergent Compositions (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、特に合成洗剤用の原料成分として、極めて有
用かつ新規な炭酸ナトリウムを製造する方法を提供する
ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a novel method for producing sodium carbonate, which is extremely useful, particularly as a raw material component for synthetic detergents.
更に詳しくは、特にこれまで市販されている無水炭酸ナ
トリウムにはない見掛比重、水への溶解性が良好な炭酸
ナトリウムの製造方法に関する。More specifically, the present invention relates to a method for producing sodium carbonate, which has good apparent specific gravity and water solubility, which are not found in anhydrous sodium carbonate commercially available so far.
従来、無水炭酸ナトリウムは、所謂アンモニア・ソーダ
法及び塩化アンモニウム・ソーダ法により、即ちアンモ
ニア性飽和塩水に炭酸ガスを反応させて得られる組型炭
酸すトリウムを力位機出ロ温度が100℃〜300℃に
なるような温度で力位して製造されている。Conventionally, anhydrous sodium carbonate has been produced by the so-called ammonia-soda method and ammonium chloride-soda method, that is, by reacting ammoniacal saturated salt water with carbon dioxide gas. It is manufactured by stressing at a temperature of 300°C.
この方法により得られた無水炭酸ナトリウムは、工業的
に軽灰と称されており、一般にその見掛比重は0.8程
度で、かつ平均粒径は90μ〜110μの範囲のもので
ある。そして、この軽灰は、一般に食品添加物用、染料
用などの化学工業原料として供されている。The anhydrous sodium carbonate obtained by this method is industrially referred to as light ash, and generally has an apparent specific gravity of about 0.8 and an average particle size in the range of 90μ to 110μ. This light ash is generally used as a raw material for chemical industries such as food additives and dyes.
一方、板ガラス、ピン、鉄相、洗剤及び化学工業などの
原料として使用され、工業的にはm灰とと称されている
無水炭酸ナトリウムは、上記の製法により得られた軽灰
に水を添加して、炭酸すトリウム−水塩(Na2co3
・lI20 )とし、次いで、これを乾燥機の出口温
度が110°C〜170℃になるような温度で乾燥する
ことにより製造している。このようにして得られた型肌
は、一般に見掛比重が1以上で、平均粒径は200μ〜
400μの範囲のものである。また、苛性ソーダの炭酸
化により、同様な重版を得ることも可能である。On the other hand, anhydrous sodium carbonate, which is used as a raw material for plate glass, pins, iron phase, detergents, and chemical industries, and is industrially referred to as m-ash, is produced by adding water to the light ash obtained by the above manufacturing method. Then, thorium carbonate-water salt (Na2co3
・lI20) and then drying this at a temperature such that the outlet temperature of the dryer is 110°C to 170°C. The mold skin obtained in this way generally has an apparent specific gravity of 1 or more and an average particle size of 200μ~
It is in the range of 400μ. It is also possible to obtain a similar reprint by carbonating caustic soda.
周知の如く、炭酸ナトリウムは、合成洗剤の原料として
欠くことのできない有効な原料である。As is well known, sodium carbonate is an indispensable and effective raw material for synthetic detergents.
これまで、炭酸ナトリウムを合成洗剤の原料として使用
する場合、軽灰、重版のいずれかを使用するにも、炭酸
ナトリウムを他の洗剤の原料と混合して、一度スラリー
状にした後、該スラリーをドライヤーで乾燥と造粒を同
時に行い洗剤を得るという方法である。このように軽灰
、重版の使用に際して、一度スラリー状にしなければな
らないこと及び乾燥造粒後において炭酸ナトリウムを添
加することができない大きな理由は、軽灰においては、
平均粒径が小さく、粒子硬度も小さいためであり、また
重版においては、見掛比重が大きいために、他の合成洗
剤原料と分離しやすいことである。更に加えて、軽灰、
重版を水に溶解して使用する場合には、軽灰は粒度が極
めて小さく、水に入れると凝集して塊になりやすく、一
方、重版は見掛比重が大きいために底に沈み、攪拌強度
を上げて溶解を助ける必要性があるなどの欠点を有する
。Until now, when using sodium carbonate as a raw material for synthetic detergents, whether using light ash or reprinted material, sodium carbonate is mixed with other detergent raw materials to form a slurry, and then the slurry is This method involves drying and granulating the detergent using a dryer at the same time. In this way, when using light ash and reprint, the main reason why it is necessary to make it into a slurry once and that sodium carbonate cannot be added after drying and granulation is that with light ash,
This is because the average particle diameter is small and the particle hardness is small, and in reprinting, the apparent specific gravity is large, so it is easy to separate from other synthetic detergent raw materials. In addition, light ash,
When using Juban by dissolving it in water, light ash has an extremely small particle size and tends to aggregate and form lumps when placed in water.On the other hand, Juban has a large apparent specific gravity, so it sinks to the bottom and the stirring intensity is low. It has disadvantages such as the need to raise the temperature to aid in dissolution.
本発明はこれらの欠点を除くために、合成洗剤の製造過
程において、一旦スラリー状にする必要がなく、かつ乾
燥造粒後においても炭酸ナトリウムを添加しうろことが
可能で、更に他の洗剤原料との添加比率をも自由に調整
し得ることが可能であると同時に他の洗剤原オ、[と分
離し難い炭酸ナトリウJ、の製造方法を鋭意探索の結果
、本発明を完成したのである。In order to eliminate these drawbacks, the present invention eliminates the need to make a slurry during the manufacturing process of synthetic detergents, allows the addition of sodium carbonate even after drying and granulation, and allows the use of other detergent raw materials. The present invention was completed as a result of intensive research into a method for producing sodium carbonate, which allows the addition ratio of sodium carbonate to be freely adjusted and which is difficult to separate from other detergent raw materials.
本発明は、これまでにない見掛比重が極めて小さく、か
つ水への溶解速度が速い、炭酸ナトリウムを製造する方
法を提供するものである。The present invention provides an unprecedented method for producing sodium carbonate that has an extremely low apparent specific gravity and a high dissolution rate in water.
即ち、本発明は重量比で重炭酸ナトリウム:炭酸す1・
IJウム(無水換算):水が1.、:0.2〜1.5:
0.1〜0.8の割合になるように調整し、該a堅物を
40℃〜105℃の温度下で均一化した後、100゛C
〜300℃の温度で力位して、見掛比重が0.4〜0、
ビ
也#、水への溶解速度が40秒以下の炭酸すl・リウム
を製造する方法である。That is, the present invention has a weight ratio of sodium bicarbonate to carbonate of 1.
IJum (anhydrous equivalent): Water is 1. , :0.2~1.5:
After adjusting the ratio to be 0.1 to 0.8 and homogenizing the solid material at a temperature of 40°C to 105°C, it was heated to 100°C.
When heated at a temperature of ~300℃, the apparent specific gravity is 0.4~0,
This is a method for producing sulfur and lithium carbonate whose dissolution rate in water is 40 seconds or less.
なお、原料は、アンモニア・ソーダ法、塩化アンモニウ
ム・ソーダ法から得られた組型炭酸ナトリウム及び炭酸
ナトリウム若しくは炭酸ナトリウム−水塩を適宜混合す
ることにより本発明を実施できるが、その場合重炭酸ナ
トリウム:炭酸ナトリウム(無水換算)の重量比は1:
0.2〜1.5に調整することが必要である。また、苛
性ソーダ液の炭酸化法あるいは隔膜法塩水電解槽からの
電解液の炭酸化法若しくは天然ソーダ灰を処理して、得
られた重炭酸ナトリウム、炭酸ナトリウム含水塩、炭酸
ナトリウム無水塩又はセスキ炭酸ナトリウム等も本発明
の原料として適宜使用できる。In addition, the present invention can be carried out by appropriately mixing the assembled sodium carbonate and sodium carbonate or sodium carbonate hydrate obtained from the ammonia-soda method or the ammonium chloride-soda method as raw materials, but in that case, sodium bicarbonate :The weight ratio of sodium carbonate (anhydrous equivalent) is 1:
It is necessary to adjust it to 0.2-1.5. In addition, sodium bicarbonate, sodium carbonate hydrate, sodium carbonate anhydrous or sesquicarbonate obtained by carbonating a caustic soda solution or carbonating an electrolyte from a diaphragm brine electrolyzer or by treating natural soda ash. Sodium and the like can also be appropriately used as raw materials in the present invention.
本発明の製法において重要なことは、重量比で重炭酸ナ
トリウム:炭酸ナトリウム(無水換算):水とを、それ
ぞれ1 : 0.2〜1.5 :Q、l〜0.8好まし
くは1 : 0.3〜1.5 :o、l−0,5の割合
になるようにU整し、該調整物を40℃〜105℃好ま
シくハ50℃〜100℃の温度下で均一化することであ
る。この条件を満足しないと、目的とする炭酸ナトリウ
ムを得ることができない。例えば混合温度が40℃未満
になると粒子硬度が弱くなり、また105°Cを越える
と見掛比重が目標と異なり大きな値を示すため好ましく
ないのである。また、これらの反応は、通常、混合して
から10〜20分で終了するが、混合機の混合操作条件
はあまり激しい攪拌をすることは望ましくない。激しい
攪拌は、炭酸ナトリウムの粒径を小さくするため、結晶
の成長を考慮した適切な攪拌下で注意深く行う必要があ
る。What is important in the production method of the present invention is that the weight ratio of sodium bicarbonate:sodium carbonate (anhydrous equivalent):water is 1:0.2-1.5:Q, preferably 1:1-0.8, respectively. The mixture is adjusted to a ratio of 0.3 to 1.5: o, l - 0.5, and the prepared product is homogenized at a temperature of 40°C to 105°C, preferably 50°C to 100°C. That's true. Unless this condition is satisfied, the desired sodium carbonate cannot be obtained. For example, if the mixing temperature is less than 40°C, the particle hardness will be weakened, and if it exceeds 105°C, the apparent specific gravity will be different from the target value and will be undesirable. Further, although these reactions usually complete within 10 to 20 minutes after mixing, it is not desirable to use a mixer to stir the mixture too vigorously. In order to reduce the particle size of sodium carbonate, vigorous stirring must be carried out carefully and with appropriate stirring in consideration of crystal growth.
又、原料中に炭酸すトリウム−水塩を含んでいるときは
、使用する水溶液の量を低めにコントロールすることが
望ましいが、全水分即ち結晶水としての水分と追加する
水溶液中の水分の合計量は前記の範囲内にすることが肝
要である。また、あまり炭酸すl・リウムー水塩の使用
量が多くなりすぎると得られる結晶の硬度が若干低下す
る場合もある。反応操作例として重炭酸ナトリウムと炭
酸ナトリウムと水とを混合する場合について述べる本発
明では例えば重炭酸ナトリウム36部に対して炭酸ナト
リウム44部、水20部を加えて20分間完全に混合す
る。重炭酸ナトリウム36部は炭酸ナトリウム当量では
約20部であるため、重炭酸ナトリウムと炭酸ナトリウ
ムの混合比は重量比で1:1.2炭酸ナトリウム当量比
で1:2となる。炭酸ナトリウム当量の比率は重炭酸ナ
トリウムと炭酸ナトリウムで2:1から1:3までの範
囲ならば同反応が起こる。この混合した物質を充分な高
温(100℃〜 300°C好しくは150℃〜220
℃)で力位して重炭酸ナトリウムの分解と加えた水の脱
水を行って目的とする炭酸ナトリウムを得る。In addition, when the raw material contains thorium carbonate-water salt, it is desirable to control the amount of the aqueous solution used to a low level, but the total water content, that is, the sum of the water as crystal water and the water in the added aqueous solution. It is important that the amount is within the ranges mentioned above. Furthermore, if the amount of sulfur/lium carbonate hydrate used is too large, the hardness of the resulting crystals may decrease slightly. In the present invention, where sodium bicarbonate, sodium carbonate, and water are mixed as an example of a reaction operation, for example, 44 parts of sodium carbonate and 20 parts of water are added to 36 parts of sodium bicarbonate, and the mixture is thoroughly mixed for 20 minutes. Since 36 parts of sodium bicarbonate is about 20 parts in sodium carbonate equivalent, the mixing ratio of sodium bicarbonate and sodium carbonate is 1:1.2 by weight and 1:2 in terms of sodium carbonate equivalent ratio. The same reaction occurs if the ratio of sodium carbonate equivalents is between 2:1 and 1:3 between sodium bicarbonate and sodium carbonate. This mixed substance is heated to a sufficiently high temperature (100°C to 300°C, preferably 150°C to 220°C).
℃) to decompose the sodium bicarbonate and dehydrate the added water to obtain the desired sodium carbonate.
本発明の製法において、更に特徴的なことは、その理由
は確認されていないが、平均粒子径が200μ〜600
μという極めて粒径の大きい炭酸ナトリウムが得られる
と共に、得られた炭酸ナトリウi
ムは、その見f、I)比重がQ、4〜eFF#−と小さ
く、かつまた粒子硬度での粉化率が10%以下、水への
溶解速度が40秒以下とこれまでにない優れた性質を具
備していることである。A further characteristic feature of the production method of the present invention is that the average particle diameter is 200μ to 600μ, although the reason for this has not been confirmed.
In addition to obtaining sodium carbonate with an extremely large particle size of μ, the resulting sodium carbonate has a small specific gravity of Q, 4 to eFF#-, and a powdering rate based on particle hardness. is less than 10%, and the dissolution rate in water is less than 40 seconds, which are unprecedented properties.
更に驚くべきことは、本発明で得られた炭酸すi・リウ
ムは、粒子の表面が従来法で得られた軽灰及び重量とは
全く異なり、棒状結晶が集合形成した状態を呈したもの
である。What is even more surprising is that the surface of the particles of the lithium carbonate obtained by the present invention is completely different from the light ash and weight obtained by the conventional method, and is in the form of aggregates of rod-shaped crystals. be.
なお、本発明においての平均粒径、見掛比重、)′J)
化率及び溶解速度については、次の測定法により算出し
た値であり、以下に示す実施例及び比較例においても同
様である。In addition, the average particle diameter, apparent specific gravity, )'J) in the present invention
The conversion rate and dissolution rate are values calculated by the following measuring method, and the same applies to the Examples and Comparative Examples shown below.
(平均粒径)
2分器で縮分した試料100gを上皿天秤(秤(1m
200g)で正しくはかり、受0■及び試料の粒径にお
おじた辿切な、JTS標準ふるいを積み重ねた最上段の
ふるいに移し、蓋をして11−タップ型振Y11機に装
着し、7分間振盪を行なった後、受皿及びそれぞれのふ
るいの残留物を上皿天秤(秤量100g )ではかり、
それぞれのふるいの呼び寸法μの累積百分率を算出し、
50w t%以上となるところのふるいの呼び寸法μを
平均粒径とする。(Average particle size) 100 g of the sample reduced with a bisparator was weighed on a balance (1 m
200g), transfer it to the top sieve of a stack of JTS standard sieves, which have a diameter equal to the particle size of the sample, cover the lid, and attach it to the 11-tap shaker Y11 machine. After shaking for a minute, the residue on the saucer and each sieve was weighed on a top balance (weighing 100 g).
Calculate the cumulative percentage of the nominal size μ of each sieve,
The nominal size μ of the sieve at which the concentration is 50 wt% or more is defined as the average particle size.
(見掛比m)
試料50gをはかり、容量100mj!のメスシリンダ
ー(内径約2.7cm)に入れ、肉厚ゴム板上で余り力
を加えないように注意しながら充分にたたき込み、最小
の容積Amβをめ、つぎの式によって見掛比重を算出す
る。(Apparent ratio m) Weigh 50g of sample, the capacity is 100mj! Place it in a graduated cylinder (inner diameter approx. 2.7 cm), and beat it thoroughly on a thick rubber plate, being careful not to apply too much force, find the minimum volume Amβ, and calculate the apparent specific gravity using the following formula. do.
50 (g )
見掛比重−□
(粉イヒ率 A(“ ″
測定しようとするものの平均粒径が、200μ〜600
μのものについては試料を1.2hはμ上のものだけを
とりだし、長く混合したものを50gはかり、重量1g
直径20mmのアルミ型内Fj、151IIとともに中
間受皿に入れて振盪機で5分間振盪(この時タタキは使
用しない)る。 また、測定しようとするものの平均粒
なお、その対応は*印で示す。50 (g) Apparent specific gravity - □ (Powdery ratio A
For μ samples, take out only the sample above μ for 1.2 hours, weigh 50g of the mixed mixture for a long time, and weigh 1g.
Place in an intermediate saucer together with Fj and 151II in an aluminum mold with a diameter of 20 mm, and shake for 5 minutes with a shaker (do not use a sear at this time). Furthermore, the correspondence between the average grain size of the object to be measured is indicated by an asterisk.
(溶解速度)
直径135n++n、高さ180mmのガラス容器に純
水800m6を入れ厚さ25 m m中12mm長さ5
8mmの攪拌翼4枚を有する攪拌機を550’rpmで
回転さ・ロ、試料200gを一度に投入して、5秒毎に
2m7!づつ溶解液を採取して滴定により、溶解炭酸す
トリウム濃度が240g//!に達するまでの所要時間
を測定する。(Dissolution rate) Pour 800m6 of pure water into a glass container with a diameter of 135n++n and a height of 180mm, and divide the container into a glass container with a thickness of 25mm and a length of 12mm.
A stirrer with four 8mm stirring blades was rotated at 550'rpm.200g of sample was added at once, and 2m7 was added every 5 seconds! The dissolved solution was sampled and titrated, and the concentration of dissolved sodium carbonate was 240 g//! Measure the time required to reach.
以下、実施例を示すが、本発明はこれらに1ζ111定
されないことはもちろんである。Examples will be shown below, but it goes without saying that the present invention is not limited to these examples.
実施例1および比較例1〜2
苛性ソーダ液の炭酸化法で得た重炭酸ナトリウム及び軽
灰とを第−表に示す割合にてミキサ−に同時供給し、混
合攪拌しながらスプレーノズルを用いて、60℃の温水
を加えた。Example 1 and Comparative Examples 1 to 2 Sodium bicarbonate and light ash obtained by the carbonation method of caustic soda solution were simultaneously fed into a mixer in the proportions shown in Table 1, and mixed and stirred using a spray nozzle. , 60°C warm water was added.
この時ミキサー内の温度は、ミキサー上部のダンパーの
開度で調整し、かつ滞在時間はミキサーへの原料の(バ
給速度で調整し運転した。At this time, the temperature inside the mixer was adjusted by the opening degree of the damper at the top of the mixer, and the residence time was adjusted by the feed rate of the raw materials to the mixer.
比較のため、上記の要領で原料の配合割合及び運転条件
を第1表のとうり変えて混合物を作り、これらの混合物
をそれぞれ同様にして力位機で温度180℃にて力位し
て得られたこれらの炭酸ナトリウムの平均粒径、見掛比
重、粉化率及び溶解速度を測定した。その結果を第1表
に示す。For comparison, mixtures were made in the same manner as above, with the mixing ratios of the raw materials and operating conditions changed from those shown in Table 1, and these mixtures were heated in the same manner using a force machine at a temperature of 180°C. The average particle diameter, apparent specific gravity, pulverization rate, and dissolution rate of these sodium carbonates were measured. The results are shown in Table 1.
実施例2
実施例1において、原料のうち苛性ソーダ液の炭酸化法
で得た重炭酸ナトリウム及び軽灰に代えて、隔膜法塩水
電解槽からの電解液の炭酸化法で得られた重炭酸すトリ
ウム及び炭酸ナトリウムを用い、かつ第1表に示すミキ
サー条件で、実施例1と同様に炭酸すトリウムを製造し
た。その結果を第1表に示す。Example 2 In Example 1, in place of the sodium bicarbonate and light ash obtained by carbonating a caustic soda solution among the raw materials, bicarbonate obtained by carbonating an electrolyte from a diaphragm salt water electrolytic cell was used. Thorium carbonate was produced in the same manner as in Example 1 using thorium and sodium carbonate and under the mixer conditions shown in Table 1. The results are shown in Table 1.
実施例3
実施例1において、原料のうち苛性ソーダ液の炭酸化法
で得た組型皮酸すトリウムに代えて、アンモニア・ソー
ダ法で得られた組型炭酸すトリウム及び軽灰を用い、か
つ第1表に示すミキサー条件で、実施例1と同様に炭酸
ナトリウムを製造した。その結果を第1表に示す。Example 3 In Example 1, in place of the structured thorium carbonate obtained by the carbonation method of caustic soda solution among the raw materials, structured thorium carbonate and light ash obtained by the ammonia soda method were used, and Sodium carbonate was produced in the same manner as in Example 1 under the mixer conditions shown in Table 1. The results are shown in Table 1.
実施例4
48%苛性ソーダ水溶液の炭酸化法で得た重炭酸ナトリ
ウム及び炭酸ナトリウム−水塩、炭酸ナトリウム無水塩
をミキサーにて混合し攪拌しながらスプレーノズルを用
いて温水溶液(60°C)を35kg使用した以外は、
第1表に示ずミキサー条(’Iで実施例1と同様に炭酸
ナトリウムを製造した。その結果を第1表に示す。Example 4 Sodium bicarbonate, sodium carbonate hydrate, and anhydrous sodium carbonate obtained by carbonation of a 48% aqueous solution of caustic soda were mixed in a mixer, and while stirring, a hot aqueous solution (60°C) was added using a spray nozzle. Except for using 35kg,
Sodium carbonate was produced in the same manner as in Example 1 using a mixer column (not shown in Table 1). The results are shown in Table 1.
参考例
参考として、従来法であるアンモニア・ソーダ法により
得た重版、軽灰と本発明法の実施例3により得た炭酸ナ
トリウムの物性比較を第二表に示す。Reference Example For reference, Table 2 shows a comparison of the physical properties of the reprint and light ash obtained by the conventional ammonia-soda method and the sodium carbonate obtained by Example 3 of the method of the present invention.
第−表
リツムでゐる。)
以′上のように比較例1は原料の混合割合の内、軽灰の
比率を高くして行ったものであるが、この時の平均粒径
は、わずかの悪化にとどまるものの、見掛比重、粉化率
は非常に大きくなる。比較例2は原料の混合割合の内、
重炭酸ナトリウムの比率を高くして行ったものであり、
見掛比重は若干高くなるものの平均粒径は大幅に悪化す
る。。 これに対して、実施例1乃至実施例4で得られ
た本発明法による 炭酸ナトリウムは、平均粒径、見掛
比重、粉化率、熔解速度の全てにおいて極めて優れた物
性を示す。Table 1 - Rhythm. ) As mentioned above, in Comparative Example 1, the ratio of light ash was increased in the mixing ratio of raw materials, but the average particle size at this time was only slightly deteriorated, but the apparent difference was Specific gravity and pulverization rate become very large. In Comparative Example 2, among the mixing ratios of raw materials,
It is made with a high proportion of sodium bicarbonate,
Although the apparent specific gravity becomes slightly higher, the average particle size deteriorates significantly. . On the other hand, the sodium carbonate produced by the method of the present invention obtained in Examples 1 to 4 exhibits extremely excellent physical properties in terms of average particle diameter, apparent specific gravity, powdering rate, and melting rate.
第二表 特許出願人 東洋曹達工業株式会社Table 2 Patent applicant: Toyo Soda Kogyo Co., Ltd.
Claims (1)
換算):水が1 : 0.2〜1.5 :o、t〜0゜
8の割合になるように調整し、該調整物を40’C〜1
05℃の温度下で均一化した後、該調整物を+00リウ
ムを製造する方法。The weight ratio of sodium bicarbonate:sodium carbonate (anhydrous equivalent):water was adjusted to a ratio of 1:0.2-1.5:o,t~0°8, and the prepared product was heated at 40'C. ~1
A method for producing +00 lium of the preparation after homogenization at a temperature of 0.05°C.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14377283A JPS6036324A (en) | 1983-08-08 | 1983-08-08 | Preparation of sodium carbonate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14377283A JPS6036324A (en) | 1983-08-08 | 1983-08-08 | Preparation of sodium carbonate |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6036324A true JPS6036324A (en) | 1985-02-25 |
Family
ID=15346658
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14377283A Pending JPS6036324A (en) | 1983-08-08 | 1983-08-08 | Preparation of sodium carbonate |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6036324A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6042230A (en) * | 1983-08-18 | 1985-03-06 | Toyo Soda Mfg Co Ltd | Manufacture of porous sodium carbonate having high surface hardness |
JPS6046919A (en) * | 1983-08-25 | 1985-03-14 | Toyo Soda Mfg Co Ltd | Porous sodium carbonate having controlled alkalinity and its production |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59190216A (en) * | 1983-04-08 | 1984-10-29 | Toyo Soda Mfg Co Ltd | Novel anhydrous sodium carbonate and its preparation |
-
1983
- 1983-08-08 JP JP14377283A patent/JPS6036324A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59190216A (en) * | 1983-04-08 | 1984-10-29 | Toyo Soda Mfg Co Ltd | Novel anhydrous sodium carbonate and its preparation |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6042230A (en) * | 1983-08-18 | 1985-03-06 | Toyo Soda Mfg Co Ltd | Manufacture of porous sodium carbonate having high surface hardness |
JPS6046919A (en) * | 1983-08-25 | 1985-03-14 | Toyo Soda Mfg Co Ltd | Porous sodium carbonate having controlled alkalinity and its production |
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