JPH04170315A - Water-insoluble sodium bicarbonate and its production - Google Patents
Water-insoluble sodium bicarbonate and its productionInfo
- Publication number
- JPH04170315A JPH04170315A JP29370490A JP29370490A JPH04170315A JP H04170315 A JPH04170315 A JP H04170315A JP 29370490 A JP29370490 A JP 29370490A JP 29370490 A JP29370490 A JP 29370490A JP H04170315 A JPH04170315 A JP H04170315A
- Authority
- JP
- Japan
- Prior art keywords
- sodium bicarbonate
- water
- baking soda
- silica
- hydrophobic silica
- 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
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 title claims abstract description 120
- 235000017557 sodium bicarbonate Nutrition 0.000 title claims abstract description 60
- 229910000030 sodium bicarbonate Inorganic materials 0.000 title claims abstract description 60
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 65
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 32
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 25
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims abstract description 5
- 230000008016 vaporization Effects 0.000 claims abstract 2
- 239000003960 organic solvent Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 19
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 6
- 206010053317 Hydrophobia Diseases 0.000 abstract 4
- 206010037742 Rabies Diseases 0.000 abstract 4
- 239000002904 solvent Substances 0.000 abstract 3
- 239000006185 dispersion Substances 0.000 abstract 1
- 231100000956 nontoxicity Toxicity 0.000 abstract 1
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 12
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 11
- 238000004090 dissolution Methods 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 235000017550 sodium carbonate Nutrition 0.000 description 5
- 229910000029 sodium carbonate Inorganic materials 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 125000001165 hydrophobic group Chemical group 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000003961 organosilicon compounds Chemical class 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- -1 polysiloxanes Polymers 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229940071207 sesquicarbonate Drugs 0.000 description 1
- 150000004756 silanes Chemical class 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000003516 soil conditioner Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Landscapes
- Silicon Compounds (AREA)
- Detergent Compositions (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は水難溶性重曹及びその製造方法に関するもので
あり、特に、消火剤、剥離剤、研磨剤、樹脂やゴムの充
填剤等に使用される重曹及びその製造方法を提供するも
のである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to poorly water-soluble sodium bicarbonate and a method for producing the same, and in particular, it is used as a fire extinguisher, a stripping agent, an abrasive, a filler for resins and rubber, etc. The present invention provides baking soda and a method for producing the same.
［従来の技術］
一般的に、重曹は苛性ソーダ又は／及び炭酸ソーダに炭
酸ガスを反応させ結晶を析出し、分離、乾燥して製造さ
れており、粉体として取扱われているものである。重曹
は、消火剤、土壌改良剤、廃ガス用脱硫剤等の多くの用
途に利用されている。[Prior Art] Generally, baking soda is produced by reacting caustic soda and/or soda carbonate with carbon dioxide gas to precipitate crystals, separating and drying the crystals, and is handled as a powder. Baking soda is used for many purposes such as a fire extinguisher, a soil conditioner, and a desulfurizing agent for waste gas.
［発明が解決しようとする課題］
しかしながら、重曹が粉体のまま使用される場合には、
重曹が空気中の水分を吸うため、貯蔵中に固結してしま
うという問題がある。これは重曹が水溶性、吸湿性であ
ることに起因する問題である。例えば、重曹を消火剤と
して使用する場合は、重曹が消火器内で固結してしまっ
てはその目的を達成しない。また、重曹をサビや塗膜の
剥離剤として使用することが考えられており、そのため
には重曹の流動性が良くなければならないが、従来の重
曹は環境により水分を吸って次第に流動性が悪くなるの
で、現実には使用することができない。[Problem to be solved by the invention] However, when baking soda is used in powder form,
The problem is that baking soda absorbs moisture from the air, causing it to solidify during storage. This problem is caused by the fact that baking soda is water-soluble and hygroscopic. For example, if baking soda is used as a fire extinguisher, it will not accomplish its purpose if it solidifies inside the fire extinguisher. It is also being considered to use baking soda as a rust and paint remover, and for that purpose baking soda must have good fluidity, but conventional baking soda absorbs moisture depending on the environment and gradually becomes less fluid. Therefore, it cannot be used in reality.
このような重曹の固結という問題の解決策として、従来
では重曹の粒度を均一にしたり、重曹の表面をなめらか
にしたり、重曹の粒子を大きくしたり、重曹が吸湿しな
いように貯蔵する等の対策がとられているが、固結の防
止には必ずしも充分ではなかった。Conventional solutions to this problem of baking soda caking include making the particle size of baking soda uniform, making the surface of baking soda smooth, making baking soda particles larger, and storing baking soda in a way that prevents it from absorbing moisture. Although countermeasures have been taken, they are not always sufficient to prevent caking.
本発明は、以上のような問題点に鑑みてなされたもので
あり、その目的は、水溶性、吸湿性が抑制されて固結し
にくい重曹を提供するところにある。The present invention has been made in view of the above-mentioned problems, and its purpose is to provide baking soda that has suppressed water solubility and hygroscopicity and is difficult to caking.
［課題を解決するための手段］
本発明者らは上記した課題を解決するために重曹の水溶
性、吸湿性が抑制された重曹の開発に鋭意努力した結果
、疎水性のシリカを一定量含む重曹によりこの課題を解
決できることを見出し本発明を完成するに至ったもので
ある。すなわち、本発明は、疎水性のシリカを０．１〜
１０’ｗｔ％含むことを特徴とする水難溶性重曹である
。[Means for Solving the Problems] In order to solve the above-mentioned problems, the present inventors made earnest efforts to develop baking soda with suppressed water solubility and hygroscopicity. The present invention was completed by discovering that baking soda can solve this problem. That is, the present invention uses hydrophobic silica in an amount of 0.1 to
It is a poorly water-soluble sodium bicarbonate characterized by containing 10'wt%.
以下、本発明についてさらに詳細に説明する。The present invention will be explained in more detail below.
本発明に用いられる重曹は、特に限定されるものではな
く、例えば、苛性ソーダ水溶液又は合成ソーダ灰若しく
は天然ソーダ灰を溶解した炭酸ソーダ水溶液を重炭酸化
して得られる重曹、炭酸ソーダの結晶やセスキ炭酸ソー
ダの結晶等に水の存在下炭酸ガスを反応させて得られる
重曹等があげられる。The baking soda used in the present invention is not particularly limited, and examples thereof include baking soda obtained by bicarbonating a caustic soda aqueous solution or a sodium carbonate aqueous solution in which synthetic soda ash or natural soda ash is dissolved, sodium carbonate crystals, and sesquicarbonate. Examples include baking soda, which is obtained by reacting soda crystals with carbon dioxide gas in the presence of water.
また、本発明に用いられる疎水性のシリカは、Ｍ値が１
０％以上のものであれば特に限定するものではなく、例
えば、含水珪酸（別名；ホワイトカーボン、成分；Ｓ１
０□）を有機珪素化合物（例えば、シラン類、シラザン
類、ポリシロキサン類等）で処理したもので、シリカの
表面がメチル基やアルキル基等の疎水基で覆われている
もの等があげられる。ここに、Ｍ値とは、疎水性を表わ
す指数であり、水とメタノールで調製した混合比率の異
なる溶液をいくつか用意し、その中にシリカを少量式れ
て振り混ぜ、メタノールの比率を多くしてゆき、シリカ
が懸濁し始めた溶液のメタノールの比率（容量％）をい
うものである。本発明では、水難溶化の効果を発揮させ
るために、Ｍ値が３０〜９０％の疎水性のシリカを使用
することが好ましい。Furthermore, the hydrophobic silica used in the present invention has an M value of 1.
There is no particular limitation as long as it is 0% or more, for example, hydrated silicic acid (also known as white carbon, component: S1
0□) treated with organosilicon compounds (for example, silanes, silazane, polysiloxanes, etc.), and the surface of the silica is covered with hydrophobic groups such as methyl groups and alkyl groups. . Here, the M value is an index expressing hydrophobicity. Prepare several solutions of water and methanol with different mixing ratios, add a small amount of silica to the solution, shake it, and increase the ratio of methanol. It refers to the methanol ratio (volume %) of the solution in which silica begins to be suspended. In the present invention, it is preferable to use hydrophobic silica with an M value of 30 to 90% in order to exhibit the effect of making it difficult to dissolve in water.
本発明は、疎水性のシリカを含む重曹に関するものであ
るが、重曹における疎水性のシリカの含有率は、０．１
〜１０ｗｔ％である必要がある。The present invention relates to baking soda containing hydrophobic silica, and the content of hydrophobic silica in baking soda is 0.1
It needs to be ~10 wt%.
疎水性のシリカが０，１ｗｔ％未満では実質的効果がな
く、また、１０ｗｔ％を越えると重曹の流動性が逆に悪
くなるため好ましくない。If the amount of hydrophobic silica is less than 0.1 wt%, there is no substantial effect, and if it exceeds 10 wt%, the fluidity of the baking soda will deteriorate, which is not preferable.
疎水性のシリカを０．１〜１０ｗｔ％含む重曹の製造方
法としては、特に限定するものではなく、例えば、重曹
と疎水性のシリカを混合する方法、有機溶媒（例えば、
エタノール、メタノール、アセトン、アルコールと水と
の混合溶媒等）に、疎水性のシリカを分散し、重曹とよ
く混合させた後、乾燥して有機溶媒を気化させる方法等
があげられる。有機溶媒を用いることにより疎水性のシ
リカを重曹に容易に均一に分散させることができ、さら
に、少量の疎水性のシリカで水難溶性化の効果を発揮さ
せることができるのであり、特に、毒性がない等の実用
性のためにエタノールを使用することが好ましい。なお
、有機溶媒を使用する場合の使用量は、重曹と疎水性の
シリカの比率や使用する混合機などで適宜選択できるが
、疎水性のシリカ１．に対して２〜１００ ｃ’ ｃの
有機溶媒を使用することか好ましい。−
なお、重曹の水溶性、吸湿性が抑制された程度は、水中
に重曹を入れると水の表面に浮くことによって容易に目
視てきるが、より定量的には、１００ｃｃの水に１０ｆ
の重曹を投入し、５分後までに溶解した重曹の重量をも
って溶解速度として、この溶解速度を目安とすることが
あげられる。The method for producing baking soda containing 0.1 to 10 wt% of hydrophobic silica is not particularly limited, and includes, for example, a method of mixing baking soda and hydrophobic silica, an organic solvent (e.g.
Examples include a method in which hydrophobic silica is dispersed in a mixed solvent of ethanol, methanol, acetone, alcohol and water, etc., mixed well with baking soda, and then dried to vaporize the organic solvent. By using an organic solvent, hydrophobic silica can be easily and uniformly dispersed in baking soda, and even a small amount of hydrophobic silica can be effective in making it poorly water soluble. It is preferable to use ethanol due to its practicality. The amount of organic solvent to be used can be selected depending on the ratio of baking soda and hydrophobic silica, the mixer used, etc., but hydrophobic silica 1. It is preferable to use an organic solvent of 2 to 100 c'c with respect to the amount of organic solvent. - The extent to which baking soda's water solubility and hygroscopicity are suppressed can be easily observed visually by floating on the surface of water when baking soda is placed in water, but more quantitatively, it is
of sodium bicarbonate is added, and the weight of the sodium bicarbonate dissolved within 5 minutes is taken as the dissolution rate, and this dissolution rate can be used as a guideline.
疎水性のシリカを含む重曹が水難溶性となる作用機構は
、シリカの一次粒子あるいは凝集粒子が重曹結晶の表面
に分散しているため、水との接触を防止していると考え
られる。The mechanism by which baking soda containing hydrophobic silica becomes poorly soluble in water is thought to be that primary particles or aggregated particles of silica are dispersed on the surface of baking soda crystals, thereby preventing contact with water.
［実施例］
く使用した重曹〉
東ソー■製の重曹（平均粒度；２４０ミクロン）く使用
した疎水性のシリカ〉
日本シリカニ業■製の疎水性のシリカ（Ｎｉｐｓｆｌ５
Ｓ−５０，Ｍ値；６０％）
く溶解速度の測定〉
２００ｃｃのビーカーに、温度２０℃の水１００ｃｃを
とり、重曹１０．を少しずつ入れる。[Example] Baking soda used > Hydrophobic silica manufactured by Tosoh Corporation (average particle size: 240 microns) Hydrophobic silica manufactured by Nippon Silikani Corporation (Nipsfl5)
S-50, M value: 60%) Measurement of dissolution rate> In a 200 cc beaker, 100 cc of water at a temperature of 20°C was added, and 10% of baking soda was added. Add little by little.
緩かに撹拌し、５分後に水溶液のみをサンプリングし、
溶解した重曹を分析する。Stir gently and sample only the aqueous solution after 5 minutes.
Analyze dissolved baking soda.
実施例１
重曹１ｋｇに疎水性のシリカ１０ｇを混ぜ、よく混合し
て水難溶性重曹を調製した。この重曹の溶解速度を測定
し、さらに、水に浮かぶがどうがを確認した。その結果
を表１に示す。Example 1 1 kg of sodium bicarbonate was mixed with 10 g of hydrophobic silica and mixed well to prepare poorly water-soluble sodium bicarbonate. We measured the dissolution rate of this baking soda and also confirmed whether it floated on water. The results are shown in Table 1.
実施例２
６０ｃｃのエタノールに１ｇの疎水性のシリカを分散し
、それを重曹１ｋｇに加えよく混合した。Example 2 1 g of hydrophobic silica was dispersed in 60 cc of ethanol, and this was added to 1 kg of baking soda and mixed well.
ついで、７０℃の乾燥機で１０分間処理しエタノールを
除去して水難溶性重曹を調製した。この重曹の溶解速度
を測定し、さらに、水に浮がぶかどうかを確認した。そ
の結果をあわせて表１に示す。Then, the mixture was treated in a dryer at 70° C. for 10 minutes to remove ethanol, thereby preparing slightly water-soluble sodium bicarbonate. The dissolution rate of this baking soda was measured, and it was also confirmed whether it would float on water. The results are also shown in Table 1.
実施例３〜６
疎水性のシリカの量を２ｇ（実施例３）、５ｇ（実施例
４）、１０ｇ（実施例５）、８０ｇ（実施例６）と変え
た以外は、実施例２と同様の条件下で水難溶性重曹を調
製して、それぞれの溶解速度を測定し、さらに、水に浮
かぶかどうかを確認した。その結果をあわせて表１に示
す。Examples 3 to 6 Same as Example 2 except that the amount of hydrophobic silica was changed to 2 g (Example 3), 5 g (Example 4), 10 g (Example 5), and 80 g (Example 6) Slightly water-soluble sodium bicarbonate was prepared under these conditions, and the dissolution rate of each was measured. Furthermore, it was confirmed whether or not it floated on water. The results are also shown in Table 1.
比較例
疎水性のシリカを含まない重曹の溶解速度を測定し、さ
らに、水に浮かぶかどうかを確認した。Comparative Example The dissolution rate of hydrophobic silica-free baking soda was measured, and it was also confirmed whether it floated on water.
その結果をあわせて表１に示す。The results are also shown in Table 1.
［発明の効果］
以上の説明から明らかなように、本発明によると重曹の
水溶性や吸湿性が抑制されるため、固結しにくい水難溶
性重曹が得られるという効果を有するものであり、さら
に、水難溶性重曹が得られることにより、今までは使用
できなかった剥離剤等としても使用できるので新しい用
途が広がるという効果を有するものである。[Effects of the Invention] As is clear from the above description, the present invention has the effect of suppressing the water solubility and hygroscopicity of sodium bicarbonate, thereby producing poorly water-soluble sodium bicarbonate that does not easily solidify. By obtaining poorly water-soluble sodium bicarbonate, it can be used as a stripping agent, etc., which could not be used until now, and has the effect of expanding new uses.
Claims (3)
特徴とする水難溶性重曹。(1) A sparingly water-soluble sodium bicarbonate characterized by containing 0.1 to 10 wt% of hydrophobic silica.
る請求項（１）に記載の水難溶性重曹の製造方法。(2) The method for producing poorly water-soluble sodium bicarbonate according to claim (1), which comprises mixing hydrophobic silica and sodium bicarbonate.
混合し、次いで有機溶媒を気化させることを特徴とする
請求項（１）に記載の水難溶性重曹の製造方法。(3) The method for producing poorly water-soluble sodium bicarbonate according to claim (1), which comprises dispersing hydrophobic silica in an organic solvent, mixing it with sodium bicarbonate, and then vaporizing the organic solvent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02293704A JP3086889B2 (en) | 1990-11-01 | 1990-11-01 | Poorly water-soluble baking soda and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02293704A JP3086889B2 (en) | 1990-11-01 | 1990-11-01 | Poorly water-soluble baking soda and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04170315A true JPH04170315A (en) | 1992-06-18 |
| JP3086889B2 JP3086889B2 (en) | 2000-09-11 |
Family
ID=17798158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02293704A Expired - Fee Related JP3086889B2 (en) | 1990-11-01 | 1990-11-01 | Poorly water-soluble baking soda and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3086889B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2750691A1 (en) * | 1996-07-08 | 1998-01-09 | Rhone Poulenc Chimie | USE OF SILICA AS AN AGENT CONTROLLING THE DEGRADATION OF BICARBONATE, RESULTING MIXTURE AND ITS APPLICATION |
| JPH11104439A (en) * | 1997-10-01 | 1999-04-20 | Asahi Glass Co Ltd | Removing agent for acidic ingredient in gas and removal of acidic ingredient |
| JP2009030003A (en) * | 2007-07-24 | 2009-02-12 | Mizue Shokai:Kk | Hardly-soluble granular sodium bicarbonate and its manufacturing method |
| JP2017094266A (en) * | 2015-11-24 | 2017-06-01 | 栗田工業株式会社 | Acidic gas treatment agent and acidic gas treatment method |
| US10065866B2 (en) | 2008-05-13 | 2018-09-04 | Solvay Sa | Process for the joint production of sodium carbonate and sodium bicarbonate |
-
1990
- 1990-11-01 JP JP02293704A patent/JP3086889B2/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2750691A1 (en) * | 1996-07-08 | 1998-01-09 | Rhone Poulenc Chimie | USE OF SILICA AS AN AGENT CONTROLLING THE DEGRADATION OF BICARBONATE, RESULTING MIXTURE AND ITS APPLICATION |
| WO1998001390A1 (en) * | 1996-07-08 | 1998-01-15 | Novacarb | Use of silica as agent for controlling the degradation of bicarbonate, resulting mixture and its application |
| US6284288B1 (en) | 1996-07-08 | 2001-09-04 | Novacarb | Use of silica as agent for controlling the degradation of bicarbonate, resulting mixture and its application |
| JPH11104439A (en) * | 1997-10-01 | 1999-04-20 | Asahi Glass Co Ltd | Removing agent for acidic ingredient in gas and removal of acidic ingredient |
| JP2009030003A (en) * | 2007-07-24 | 2009-02-12 | Mizue Shokai:Kk | Hardly-soluble granular sodium bicarbonate and its manufacturing method |
| US10065866B2 (en) | 2008-05-13 | 2018-09-04 | Solvay Sa | Process for the joint production of sodium carbonate and sodium bicarbonate |
| US10807876B2 (en) | 2008-05-13 | 2020-10-20 | Solvay Sa | Process for the joint production of sodium carbonate and sodium bicarbonate |
| JP2017094266A (en) * | 2015-11-24 | 2017-06-01 | 栗田工業株式会社 | Acidic gas treatment agent and acidic gas treatment method |
| WO2017090303A1 (en) * | 2015-11-24 | 2017-06-01 | 栗田工業株式会社 | Acidic-gas treatment agent and acidic-gas treatment method |
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| Publication number | Publication date |
|---|---|
| JP3086889B2 (en) | 2000-09-11 |
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