JP2002047349A - Powdered sodium carboxymethyl cellulose contains less fibrous material and its manufacturing method - Google Patents
Powdered sodium carboxymethyl cellulose contains less fibrous material and its manufacturing methodInfo
- Publication number
- JP2002047349A JP2002047349A JP2000233535A JP2000233535A JP2002047349A JP 2002047349 A JP2002047349 A JP 2002047349A JP 2000233535 A JP2000233535 A JP 2000233535A JP 2000233535 A JP2000233535 A JP 2000233535A JP 2002047349 A JP2002047349 A JP 2002047349A
- Authority
- JP
- Japan
- Prior art keywords
- cmc
- weight
- powdered
- fibrous
- fibrous material
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 title claims description 6
- 239000001768 carboxy methyl cellulose Substances 0.000 title claims description 6
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 title claims description 6
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 title claims description 6
- 239000002657 fibrous material Substances 0.000 title abstract description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000002245 particle Substances 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims description 8
- 238000007873 sieving Methods 0.000 claims description 6
- 239000011734 sodium Substances 0.000 abstract description 72
- 229910052708 sodium Inorganic materials 0.000 abstract description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 abstract 2
- 229920002678 cellulose Polymers 0.000 abstract 2
- 239000001913 cellulose Substances 0.000 abstract 2
- 239000000843 powder Substances 0.000 description 16
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 12
- 230000005484 gravity Effects 0.000 description 8
- 239000002994 raw material Substances 0.000 description 7
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 6
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 4
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 3
- 125000004432 carbon atom Chemical group C* 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 235000013312 flour Nutrition 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- QMGYPNKICQJHLN-UHFFFAOYSA-M Carboxymethylcellulose cellulose carboxymethyl ether Chemical compound [Na+].CC([O-])=O.OCC(O)C(O)C(O)C(O)C=O QMGYPNKICQJHLN-UHFFFAOYSA-M 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000007884 disintegrant Substances 0.000 description 1
- 238000006266 etherification reaction Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 235000013373 food additive Nutrition 0.000 description 1
- 239000002778 food additive Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000000118 hair dye Substances 0.000 description 1
- 230000003780 keratinization Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000020124 milk-based beverage Nutrition 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 239000000606 toothpaste Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Landscapes
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、粉末状カルボキシ
メチルセルロースナトリウム（以下、「ＣＭＣ−Ｎａ」
という。）に混在する繊維状品が低減された粉末状ＣＭ
Ｃ−Ｎａの製造方法および該方法により製造された粉末
状ＣＭＣ−Ｎａに関する。TECHNICAL FIELD The present invention relates to a powdery sodium carboxymethylcellulose (hereinafter referred to as "CMC-Na").
That. ) Powder CM with reduced fibrous products
The present invention relates to a method for producing C-Na and powdered CMC-Na produced by the method.
【０００２】[0002]
【従来の技術】一般的に粉末状ＣＭＣ−Ｎａは、セルロ
ース質の原材料をカルボキシメチル化することにより得
られ、最終製品とするときは、乾燥し、粉砕したのち、
所定の粒度（粒子径）に合致させるために篩を通す。2. Description of the Related Art In general, powdered CMC-Na is obtained by carboxymethylation of a cellulosic raw material.
It is passed through a sieve to conform to a predetermined particle size (particle size).
【０００３】しかし、粉末状ＣＭＣ−Ｎａ中に繊維状品
が混在することがある。この繊維状品が混在すると、粉
末状ＣＭＣ−Ｎａの粉体流動性が低下し、水に溶解させ
て使用するときに繊維状品が水面上に浮き上がり、ママ
コの発生を助長して、溶解性を悪化させ、さらには粉末
状ＣＭＣ−Ｎａの粉末を小麦粉などとプレミックスして
使用するときなどには、均一な混合ができないなどの問
題が発生していた。[0003] However, fibrous products may be mixed in powdered CMC-Na. When this fibrous product is mixed, the powder fluidity of the powdered CMC-Na decreases, and the fibrous product floats up on the surface of the water when used after being dissolved in water. In addition, when premixed powdered CMC-Na powder is used with flour or the like, uniform mixing cannot be achieved.
【０００４】このような好ましくない現象を抑えるため
に、ＣＭＣ−Ｎａの角質化、すなわち製造時において乾
燥前の湿潤状態で水を加えて混練し、繊維状品の発生を
抑えたのち、乾燥、粉砕する方法をとっているが、この
方法では作業が煩雑になり、乾燥熱量を多く必要とし、
乾燥に長時間を要する。このため粉末状ＣＭＣ−Ｎａの
粉末形状の劣化、ＣＭＣ−Ｎａ溶液の粘度の低下など、
品質に対する好ましくない影響が大きい。In order to suppress such undesired phenomena, keratinization of CMC-Na, that is, kneading by adding water in a wet state before drying at the time of production to suppress the generation of fibrous products, Although the method of pulverization is adopted, this method requires complicated work, requires a large amount of drying heat,
It takes a long time to dry. For this reason, deterioration of the powder shape of the powdered CMC-Na, a decrease in the viscosity of the CMC-Na solution,
Large unfavorable impact on quality.
【０００５】また、得られた粉末状ＣＭＣ−Ｎａに混在
する繊維状品は篩処理をしても取り除くことは難しく、
このためにやむを得ず実施する方法として所定粒度より
細かい篩で篩処理をするが、粉末状ＣＭＣ−Ｎａの粒度
分布が異なり、これでも充分繊維状物を取り除くことが
できないという問題があった。Further, it is difficult to remove the fibrous product mixed with the obtained powdered CMC-Na even by sieving.
For this reason, sieving with a sieve finer than a predetermined particle size is a unavoidable method, but there is a problem that the particle size distribution of the powdered CMC-Na is different and fibrous materials cannot be sufficiently removed even with this.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、混在する繊
維状品が低減された粉末状ＣＭＣ−Ｎａおよびその製造
方法を提供することを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide a powdery CMC-Na having a reduced amount of mixed fibrous articles and a method for producing the same.
【０００７】[0007]
【課題を解決するための手段】本発明は、粒度が２５０
μｍ以下の粉末状ＣＭＣ−Ｎａに対して、１０〜２０重
量％の低級アルコールを添加し湿潤させたのち、さらに
水を添加して乾燥させ、そののち２５０μｍ以下の篩に
かけて繊維状品を取り除く繊維状品が低減された粉末状
ＣＭＣ−Ｎａの製造方法に関する。SUMMARY OF THE INVENTION The present invention provides a method for producing a fine particle having a particle size of 250.
10 to 20% by weight of lower alcohol is added to powdered CMC-Na having a particle size of not more than 10 μm and wetted. Then, water is further added and dried. The present invention relates to a method for producing powdered CMC-Na with reduced number of articles.
【０００８】また、好ましい実施態様として、前記繊維
状品の含有量が３．０重量％以下である粉末状ＣＭＣ−
Ｎａの製造方法に関する。In a preferred embodiment, the content of the fibrous article is 3.0% by weight or less.
The present invention relates to a method for producing Na.
【０００９】本発明は、前記方法により製造された繊維
状品を３．０重量％以下含有する粉末状ＣＭＣ−Ｎａに
関する。The present invention relates to a powdered CMC-Na containing not more than 3.0% by weight of a fibrous product produced by the above method.
【００１０】[0010]
【発明の実施の形態】本発明においては、粉末状ＣＭＣ
−Ｎａに対して、低級アルコールを添加し湿潤させたの
ち、さらに水を添加して乾燥させ、そののち２５０μｍ
以下の篩にかけることによって繊維状品を取り除き、繊
維状品が低減された粉末状ＣＭＣ−Ｎａを製造する。DETAILED DESCRIPTION OF THE INVENTION In the present invention, powdered CMC
After adding a lower alcohol to −Na and moistening, further adding water and drying, and then 250 μm
The fibrous material is removed by sieving as follows to produce powdered CMC-Na with reduced fibrous material.
【００１１】本発明に用いる粉末状ＣＭＣ−Ｎａの粒度
の上限は粉末状である点で、２５０μｍであることが必
要であり、好ましくは２００μｍ、より好ましくは１８
０μｍである。一方、粒度の下限は１２０μｍであるこ
とが好ましく、より好ましくは１００μｍである。本発
明に用いる粉末状ＣＭＣ−Ｎａのエーテル化度、粘度お
よび純度などは限定されない。本発明においては、公知
の各種の方法で製造した粉末状ＣＭＣ−Ｎａから繊維状
品が低減された粉末状ＣＭＣ−Ｎａを製造することがで
きる。本発明においては、繊維状品を含む粉末状ＣＭＣ
−Ｎａを湿潤状態で混練処理することにより、篩を通し
たときの繊維状品の分別が容易になり、繊維状品が低減
された粉末状ＣＭＣ−Ｎａを容易に製造することができ
る。The upper limit of the particle size of the powdered CMC-Na used in the present invention is required to be 250 μm, preferably 200 μm, more preferably 18 μm, in view of being powdery.
0 μm. On the other hand, the lower limit of the particle size is preferably 120 μm, and more preferably 100 μm. The degree of etherification, viscosity, purity and the like of the powdered CMC-Na used in the present invention are not limited. In the present invention, powdered CMC-Na with reduced fibrous products can be produced from powdered CMC-Na produced by various known methods. In the present invention, a powdery CMC containing a fibrous product is used.
By kneading the -Na in a wet state, it is easy to separate the fibrous product through a sieve, and powdered CMC-Na with reduced fibrous product can be easily produced.
【００１２】粉末状ＣＭＣ−Ｎａに低級アルコールを添
加することにより、湿潤させることができる。低級アル
コールを添加し、湿潤させることにより粉末状ＣＭＣ−
Ｎａが加湿状態となり、粒度分別しやすくなるという効
果が得られる。By adding a lower alcohol to powdered CMC-Na, it can be wetted. Powdered CMC- is obtained by adding a lower alcohol and moistening the powder.
The effect that Na is in a humidified state and the particle size can be easily separated is obtained.
【００１３】前記低級アルコールとしては、低価格、入
手のしやすさという点で、メタノール、エタノール、イ
ソプロピルアルコール、ブチルアルコールなどの炭素数
が４以下のアルコールが好ましく、これらのアルコール
を混合して使用することもできる。また、炭素数が４以
下のアルコールに炭素数が５以上のアルコールを混合し
て用いることもできる。本発明により得られる粉末状Ｃ
ＭＣ−Ｎａを食品、医薬香粧品用途に用いる場合には、
処理後の低級アルコールの取り除きやすさの点で、メタ
ノール、エタノールまたはイソプロピルアルコールが好
ましい。As the lower alcohol, alcohols having 4 or less carbon atoms, such as methanol, ethanol, isopropyl alcohol and butyl alcohol, are preferred from the viewpoint of low cost and availability, and these alcohols are used as a mixture. You can also. Further, an alcohol having 4 or less carbon atoms and an alcohol having 5 or more carbon atoms can be mixed and used. Powder C obtained by the present invention
When MC-Na is used for food, pharmaceutical and cosmetic applications,
Methanol, ethanol or isopropyl alcohol is preferred from the viewpoint of easy removal of the lower alcohol after the treatment.
【００１４】前記低級アルコールは、水に対する相溶性
が大きく、溶液の粘度が小さい点で、８０重量％以上の
水溶液として用いることが好ましく、８５重量％以上の
水溶液として用いることがより好ましい。The lower alcohol is preferably used as an aqueous solution of 80% by weight or more, more preferably as an aqueous solution of 85% by weight or more, in view of high compatibility with water and low viscosity of the solution.
【００１５】前記低級アルコールの添加量の上限は、粉
末状ＣＭＣ−Ｎａに対して２０重量％とする必要があ
り、好ましくは１８重量％である。添加量が２０重量％
より多くなると、粉末状ＣＭＣ−Ｎａが溶解を生じダン
ゴ状になるという欠点が生じる。一方、添加量の下限
は、粉末状ＣＭＣ−Ｎａに対して１０重量％とする必要
があり、好ましくは１２重量％である。添加量が１０重
量％より少ないと充分な湿潤効果が得られない。The upper limit of the amount of the lower alcohol must be 20% by weight, preferably 18% by weight, based on the powdered CMC-Na. 20% by weight
When the amount is larger, there is a disadvantage that the powdered CMC-Na dissolves and becomes dango-shaped. On the other hand, the lower limit of the addition amount needs to be 10% by weight, preferably 12% by weight, based on the powdered CMC-Na. If the amount is less than 10% by weight, a sufficient wetting effect cannot be obtained.
【００１６】本発明においては、粉末状ＣＭＣ−Ｎａに
１０〜２０重量％の低級アルコールを加え充分に湿潤さ
せたのち、ＣＭＣ−Ｎａの粉末形状による分別を容易と
する点で、さらに水を加える。In the present invention, 10 to 20% by weight of a lower alcohol is added to powdered CMC-Na to sufficiently wet it, and then water is further added to facilitate separation of CMC-Na in powder form. .
【００１７】前記水の添加量の上限は、粉末状ＣＭＣ−
Ｎａに対して１０重量％が好ましく、８重量％がより好
ましい。水の添加量が１０重量％より多いと粉末状ＣＭ
Ｃ−Ｎａが溶解を生じダンゴ状になり著しく比重が高く
なる。一方、添加量の下限は、粉末状ＣＭＣ−Ｎａに対
して５重量％が好ましく、より好ましくは３重量％であ
る。水の添加量が不足すると、粉末状ＣＭＣ−Ｎａに水
が作用して低比重の粉末を形成することができない。The upper limit of the amount of water to be added is as follows.
It is preferably 10% by weight with respect to Na, and more preferably 8% by weight. If the amount of water added is more than 10% by weight, powder CM
C-Na dissolves into a dango-like shape, and the specific gravity is significantly increased. On the other hand, the lower limit of the addition amount is preferably 5% by weight, more preferably 3% by weight, based on the powdered CMC-Na. If the amount of water added is insufficient, water acts on the powdered CMC-Na to form a powder having a low specific gravity.
【００１８】本発明においては、水を添加後、攪拌して
均一に混合したのち、乾燥する。また、乾燥後の粉末状
ＣＭＣ−Ｎａの揮発分は１０重量％以下が好ましい。揮
発分が１０重量％より大きくなると、食品添加物、日本
薬局方などの公的規格に適合せず使用できない。In the present invention, after adding water, the mixture is uniformly mixed by stirring, and then dried. The volatile matter of the powdered CMC-Na after drying is preferably 10% by weight or less. If the volatile content is more than 10% by weight, it cannot be used because it does not conform to official standards such as food additives and Japanese Pharmacopoeia.
【００１９】本発明においては、前記乾燥後の粉末状Ｃ
ＭＣ−Ｎａを２５０μｍ以下の篩にかけて繊維状品を除
去することにより繊維状品が低減された粉末状ＣＭＣ−
Ｎａを製造する。処理前の粉末状ＣＭＣ−Ｎａ（原粉）
と同一粒度の篩にかけることにより、原粉と同一粒度の
粉末状ＣＭＣ−Ｎａを製造することができる。繊維状品
を除去することにより、粉末状ＣＭＣ−Ｎａの粉体流動
性の低下を防止し、水に溶解させて使用するときにママ
コの発生を抑え、さらには粉末状ＣＭＣ−Ｎａを小麦粉
などとプレミックスして使用するときなどにおいて均一
な混合物が得られる。In the present invention, the dried powdered C
Powdered CMC- in which fibrous materials are reduced by removing the fibrous materials by passing MC-Na through a sieve of 250 μm or less.
Produce Na. Powdered CMC-Na (raw powder) before treatment
The powdery CMC-Na having the same particle size as the raw powder can be produced by sieving the same particle size. By removing the fibrous product, the powder fluidity of powdered CMC-Na is prevented from lowering, the occurrence of mamako is suppressed when dissolved in water and used, and the powdered CMC-Na is further used as flour. A uniform mixture can be obtained, for example, when premixed with water.
【００２０】前記繊維状品とは、ＣＭＣ−Ｎａではある
が綿状になった軽比重品をいい、ＣＭＣ−Ｎａの粉体中
に綿くずのように混在する。The fibrous product is a light specific gravity product which is CMC-Na but is in the form of cotton, and is mixed in the CMC-Na powder like cotton lint.
【００２１】本発明によれば、たとえば、繊維状品の混
入量が５．０重量％以下、好ましくは３.０重量％以
下、より好ましくは１．０重量％以下の粉末状ＣＭＣ−
Ｎａを製造することができる。繊維状品の混入量が５．
０重量％より大きくなるとＣＭＣ−Ｎａの粉末比重が軽
く、粉体流動性が悪化するが、混入量をとくに３．０重
量％以下とすることによりＣＭＣ−Ｎａの粉体流動性に
富み、ＣＭＣ−Ｎａの取り出しおよび使用時、投入時な
どに詰りなどが発生しにくいという利点が得られる。According to the present invention, for example, a powdered CMC- having a fiber content of 5.0% by weight or less, preferably 3.0% by weight or less, more preferably 1.0% by weight or less.
Na can be produced. 4. The amount of fibrous material mixed is 5.
When the content is more than 0% by weight, the powder specific gravity of CMC-Na becomes light and the powder fluidity deteriorates. However, when the mixing amount is particularly set to 3.0% by weight or less, the powder fluidity of CMC-Na is rich and the CMC-Na becomes rich. An advantage is obtained in that clogging or the like is unlikely to occur at the time of taking out and using -Na, at the time of charging, and the like.
【００２２】本発明に基づいて製造される繊維状品が低
減された粉末状ＣＭＣ−Ｎａは、粉末状ＣＭＣ−Ｎａが
すでに使用されている分野、たとえば土木ボーリング用
泥水増粘安定剤、釉薬安定化剤、錠剤用崩壊剤、パップ
剤、乳飲料などの食品用増粘剤、繊維壁用糊剤、飼料用
バインダー、染毛、歯磨などの分野に使用することがで
きるが、用途はこれらの分野に限定されない。The powdery CMC-Na produced according to the present invention, in which the amount of fibrous products is reduced, is used in fields where powdered CMC-Na is already used, for example, mud thickening stabilizers for civil engineering boring, glaze stabilization. Agents, disintegrants for tablets, cataplasms, thickeners for foods such as milk drinks, glues for fiber walls, binders for feed, hair dyes, toothpastes, etc. It is not limited to the field.
【００２３】[0023]
【実施例】以下の実施例により本発明をさらに詳細に説
明するが、本発明はこれらの例によってなんら限定され
るものではない。The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples.
【００２４】実施例１〜６および比較例１〜５ つぎの手順で原料ＣＭＣ−Ｎａから繊維状品を除去して
製品ＣＭＣ−Ｎａを製造した。 （１）加熱装置付の３Ｌ容一軸リボンブレンダーに、１
８０μｍの篩で分別した原料ＣＭＣ−Ｎａ（原粉）を２
００ｇ仕込む。 （２）２０ｒｐｍで攪拌しながら、メタノール０〜５０
ｇを添加し、室温で約１０分攪拌する。 （３）そののち、水０〜５０ｇを徐々に添加したのち、
室温で約２０分間攪拌する。 （４）そののち、ジャケット温度１１０℃で加熱し、粉
末状ＣＭＣ−Ｎａの揮発分を１０重量％以下にする。揮
発分は途中でチェックするのが難しいので、２時間加熱
を継続したのち、ケット水分計で揮発分を確認し、揮発
分が１０重量％以上の場合はさらに加熱を続ける。 （５）揮発分が１０重量％以下になった粉末状ＣＭＣ−
Ｎａを、原粉と同一の篩（１８０μｍ）で分別し、篩の
上に残った繊維状品を取り除き、篩通過分を製品ＣＭＣ
−Ｎａとして回収した。取り除いた繊維状品の重量を測
定し、除去率（原料ＣＭＣ−Ｎａの重量に対する取り除
いた繊維状品の重量の割合）を求めた。Examples 1 to 6 and Comparative Examples 1 to 5 A fibrous product was removed from the raw material CMC-Na by the following procedure to produce a product CMC-Na. (1) 1L uniaxial ribbon blender with heating device
The raw material CMC-Na (raw powder) separated by an 80 μm sieve was mixed with 2
Add 00g. (2) While stirring at 20 rpm, methanol 0 to 50
g and stirred at room temperature for about 10 minutes. (3) Then, after gradually adding 0 to 50 g of water,
Stir at room temperature for about 20 minutes. (4) Thereafter, heating is performed at a jacket temperature of 110 ° C. to reduce the volatile content of the powdered CMC-Na to 10% by weight or less. Since it is difficult to check the volatile content on the way, heating is continued for 2 hours, and then the volatile content is confirmed with a moisture meter. If the volatile content is 10% by weight or more, heating is further continued. (5) CMC powder having a volatile content of 10% by weight or less.
Na is separated by the same sieve (180 μm) as the raw powder, the fibrous material remaining on the sieve is removed, and the amount passed through the sieve is used as the product CMC.
Recovered as -Na. The weight of the removed fibrous product was measured, and the removal rate (the ratio of the weight of the removed fibrous product to the weight of the raw material CMC-Na) was determined.
【００２５】原料ＣＭＣ−Ｎａおよび製品ＣＭＣ−Ｎａ
の評価はつぎのようにした。 １％粘度：１重量％無水物水溶液をＢＭ型粘度計６０ｒ
ｐｍ ２５℃にて測定した。 嵩比重（見掛比重）：ＪＩＳＫ３３６２にて分析した。 混入繊維状品量：直径２００ｍｍの円筒型容器に粉末状
ＣＭＣ−Ｎａを２０ｇ採取し、手で篩うように振動を５
分間与えた。繊維状品は、粉末状ＣＭＣ−Ｎａの上部に
浮き上り綿状物に成長した。これをピンセットで取り、
重量を測定し、粉末状ＣＭＣ−Ｎａ全体の重量に対する
割合を求めた（重量％）。Raw material CMC-Na and product CMC-Na
Was evaluated as follows. 1% viscosity: 1% by weight aqueous solution of anhydrous 60m BM type viscometer
pm Measured at 25 ° C. Bulk specific gravity (apparent specific gravity): Analyzed according to JIS K3362. Amount of mixed fibrous material: 20 g of powdered CMC-Na was collected in a cylindrical container having a diameter of 200 mm, and vibration was applied as if sieving by hand.
Give for minutes. The fibrous material floated on top of the powdered CMC-Na and grew into a cotton-like material. Take this with tweezers,
The weight was measured, and the ratio to the total weight of the powdered CMC-Na was determined (% by weight).
【００２６】原料ＣＭＣ−Ｎａの見掛比重、１％粘度お
よび混入繊維状品量、原料ＣＭＣ−Ｎａ、メタノールお
よび水の添加量、繊維状品の除去率ならびに製品ＣＭＣ
−Ｎａの見掛比重および混入繊維状品量を表１に示す。Apparent specific gravity of raw material CMC-Na, 1% viscosity and amount of mixed fibrous material, raw material CMC-Na, added amount of methanol and water, removal rate of fibrous product and product CMC
Table 1 shows the apparent specific gravity of -Na and the amount of mixed fibrous products.
【００２７】[0027]
【表１】 [Table 1]
【００２８】[0028]
【発明の効果】本発明によれば、粉末状ＣＭＣ−Ｎａ中
に混在する繊維状品を取り除き、繊維状品が低減された
粉末状ＣＭＣ−Ｎａを容易に製造することができる。According to the present invention, fibrous products mixed in powdered CMC-Na are removed, and powdered CMC-Na with reduced fibrous products can be easily produced.
Claims (3)
シメチルセルロースナトリウムに対して、１０〜２０重
量％の低級アルコールを添加して湿潤させたのち、さら
に水を添加し、乾燥させ、そののち２５０μｍ以下の篩
にかけて繊維状品を取り除くことを特徴とする繊維状品
が低減された粉末状カルボキシメチルセルロースナトリ
ウムの製造方法。1. A powdery sodium carboxymethylcellulose having a particle size of 250 μm or less is wetted by adding 10 to 20% by weight of a lower alcohol, and then water is further added and dried. A method for producing powdery sodium carboxymethylcellulose having reduced fibrous products, characterized by removing the fibrous products by sieving.
下である請求項１記載の粉末状カルボキシメチルセルロ
ースナトリウムの製造方法。2. The method for producing powdery sodium carboxymethylcellulose according to claim 1, wherein the content of the fibrous product is 5.0% by weight or less.
維状品を５．０重量％以下含有する粉末状カルボキシメ
チルセルロースナトリウム。3. A powdery sodium carboxymethylcellulose containing not more than 5.0% by weight of a fibrous product produced by the method according to claim 1.
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| JP2000233535A JP3490961B2 (en) | 2000-08-01 | 2000-08-01 | Powdery sodium carboxymethylcellulose with reduced fibrous products and method for producing the same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000233535A JP3490961B2 (en) | 2000-08-01 | 2000-08-01 | Powdery sodium carboxymethylcellulose with reduced fibrous products and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
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| JP3490961B2 JP3490961B2 (en) | 2004-01-26 |
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| WO2021019896A1 (en) * | 2019-07-29 | 2021-02-04 | ダイセルファインケム株式会社 | Carboxymethyl cellulose or salt thereof, and composition thereof |
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2000
- 2000-08-01 JP JP2000233535A patent/JP3490961B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019044382A1 (en) * | 2017-09-01 | 2019-03-07 | Ｎｅｃエナジーデバイス株式会社 | Method for producing aqueous electrode slurry for lithium ion batteries, method for producing electrode for lithium ion batteries, thickening agent powder for lithium ion batteries, aqueous electrode slurry, electrode for lithium ion batteries, and lithium ion battery |
| JPWO2019044382A1 (en) * | 2017-09-01 | 2020-10-01 | 株式会社エンビジョンＡｅｓｃエナジーデバイス | Method for manufacturing water-based electrode slurry for lithium-ion batteries, method for manufacturing electrodes for lithium-ion batteries, thickener powder for lithium-ion batteries, water-based electrode slurry, electrodes for lithium-ion batteries and lithium-ion batteries |
| JP7161478B2 (en) | 2017-09-01 | 2022-10-26 | 株式会社エンビジョンＡｅｓｃジャパン | Method for producing aqueous electrode slurry for lithium ion battery, method for producing electrode for lithium ion battery, thickener powder for lithium ion battery, aqueous electrode slurry, electrode for lithium ion battery, and lithium ion battery |
| WO2021019896A1 (en) * | 2019-07-29 | 2021-02-04 | ダイセルファインケム株式会社 | Carboxymethyl cellulose or salt thereof, and composition thereof |
| JP2021021018A (en) * | 2019-07-29 | 2021-02-18 | ダイセルミライズ株式会社 | Carboxy methylcellulose or salt thereof and composition thereof |
| CN113993904A (en) * | 2019-07-29 | 2022-01-28 | 大赛璐美华株式会社 | Carboxymethyl cellulose or salt thereof and composition thereof |
| JP7481812B2 (en) | 2019-07-29 | 2024-05-13 | ダイセルミライズ株式会社 | Carboxymethylcellulose or its salt and composition thereof |
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| Publication number | Publication date |
|---|---|
| JP3490961B2 (en) | 2004-01-26 |
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