JPS5991196A - Viscosity reducer for highly concentrated coke/water slurry - Google Patents
Viscosity reducer for highly concentrated coke/water slurryInfo
- Publication number
- JPS5991196A JPS5991196A JP20241682A JP20241682A JPS5991196A JP S5991196 A JPS5991196 A JP S5991196A JP 20241682 A JP20241682 A JP 20241682A JP 20241682 A JP20241682 A JP 20241682A JP S5991196 A JPS5991196 A JP S5991196A
- Authority
- JP
- Japan
- Prior art keywords
- coke
- water
- viscosity
- water slurry
- slurry
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 239000002002 slurry Substances 0.000 title claims abstract description 35
- 239000000571 coke Substances 0.000 title claims abstract description 32
- 239000003638 chemical reducing agent Substances 0.000 title abstract description 7
- 150000003839 salts Chemical class 0.000 claims abstract description 12
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims abstract description 10
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims abstract description 9
- 239000001768 carboxy methyl cellulose Substances 0.000 claims abstract description 4
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims abstract description 4
- 239000012749 thinning agent Substances 0.000 claims description 10
- 239000007864 aqueous solution Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 abstract description 8
- 239000000446 fuel Substances 0.000 abstract description 4
- 238000005086 pumping Methods 0.000 abstract description 3
- 230000018044 dehydration Effects 0.000 abstract description 2
- 238000006297 dehydration reaction Methods 0.000 abstract description 2
- 229940105329 carboxymethylcellulose Drugs 0.000 abstract 2
- 239000004615 ingredient Substances 0.000 abstract 2
- 239000002245 particle Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- -1 alkali metal salts Chemical class 0.000 description 3
- 239000002006 petroleum coke Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000006266 etherification reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- FOCAUTSVDIKZOP-UHFFFAOYSA-N chloroacetic acid Chemical compound OC(=O)CCl FOCAUTSVDIKZOP-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002255 enzymatic effect Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- KHIWWQKSHDUIBK-UHFFFAOYSA-N periodic acid Chemical class OI(=O)(=O)=O KHIWWQKSHDUIBK-UHFFFAOYSA-N 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000005518 polymer electrolyte Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000012429 reaction media Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Landscapes
- Liquid Carbonaceous Fuels (AREA)
Abstract
Description
【発明の詳細な説明】
本発明はコークス−水スラリー用減粘剤に関する。さら
に詳しくは、コークスを水に分散させ。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a thinning agent for coke-water slurries. More specifically, dispersing coke in water.
ポンプ輸送が可能な高濃度コークス−水スラリーを提供
するための減粘剤に関する。The present invention relates to a thinning agent for providing a highly concentrated coke-water slurry that can be pumped.
１−
近年石油資源の枯渇により、エネルギー資源の多様化、
安定した供給の確保が問題となっている。こうしたこと
から、エネルギー資源の有効利用の面より、コークスの
利用が再認識され。1- Due to the depletion of oil resources in recent years, the diversification of energy resources,
Securing a stable supply is an issue. For these reasons, the use of coke has been reaffirmed from the perspective of effective use of energy resources.
その利用方法が種々検討されている。ところが、コーク
スは石油と異なり、固体であるため、ポンプ輸送ができ
ない。そのためコークスを粉体化して水中に分散し、水
スラリーにする方法が種々検討されている。しかしなが
ら、この方法は現技術では、コークス濃度を上げていく
と著しく増粘し、流動性がなくなるため、ポンプ輸送が
困難になってくる。Various ways of using it are being considered. However, unlike petroleum, coke is a solid and cannot be transported by pump. For this reason, various methods are being considered for pulverizing coke and dispersing it in water to form a water slurry. However, with current technology, as the coke concentration increases, this method significantly thickens and loses fluidity, making pumping difficult.
一方、コークス濃度を下げると輸送効率が低下し、この
ようなコークス−水スラリーは流体化燃料としては適当
ではかく、実用的でない。On the other hand, if the coke concentration is lowered, the transport efficiency will be lowered, and such a coke-water slurry, although suitable as a fluidized fuel, is not practical.
本発明者らは、かかる従来のコークス−水スラリーの欠
点を改良すべく、高濃度のコークス−水スラリーを流動
化し、ポンプ輸送を可能にするコークス−水スラリー用
減粘剤について鋭意研究した結果、少量の添加で、コー
クス−水ス２−
ラリ−の粘度を著しく減少し、そのため高濃度のコーク
ス濃度においてもポンプ輸送が可能なコークス−水スラ
リーを提供する減粘剤の開発に成功した。In order to improve the drawbacks of conventional coke-water slurries, the present inventors have conducted intensive research on a coke-water slurry thinning agent that can fluidize highly concentrated coke-water slurries and enable pump transportation. have successfully developed a viscosity-thinning agent which, when added in small amounts, significantly reduces the viscosity of a coke-water slurry, thereby providing a coke-water slurry that can be pumped even at high coke concentrations.
本発明の減粘剤を用いると、少量の水でコークスを流動
化できるため、ポンプ輸送を可能にすることは勿論、例
えばボイラー燃料用に用いる場合、そのままの状態でボ
イラー燃焼ができ、燃焼前の脱水工程をも省くことがで
きる。本発明の減粘剤の使用により、コークスを水スラ
リーの形で輸送することを必要とするあらゆる操作にお
いて大きな利点を有し、その利用用途は、大きく広がる
。By using the thinning agent of the present invention, coke can be fluidized with a small amount of water, which not only makes it possible to transport it by pump, but also, when used for boiler fuel, for example, it can be burned in a boiler as it is, and it can be used before combustion. The dehydration step can also be omitted. The use of the thinners of the present invention has significant advantages in any operation requiring the transport of coke in the form of an aqueous slurry, and its applications are greatly expanded.
コークス−水スラリーに使用されるコークスは。Coke is used in coke-water slurry.
石油コークスであり１石油の軽質留分の収率を上げるた
め熱分解法の副生物である石油コークスおよびこれを力
焼して得られる力焼石油コークスなどがある。また、水
スラリー中のコークス粒度も粉末であればどのような粒
度であってもよいが、例えば、ボイラー燃料用に用いる
場３−
合、現在、火力発電所で燃焼されるものは２００メツシ
ュパス９０％以上のものであるから、この粒度がコーク
ス粒度の目安である。しかし、本発明の減粘剤は、粒度
によって影響されるものではなく、どのような粒径のコ
ークス粉末に対してもすぐれた効果を発揮する。There are petroleum coke, which is a byproduct of pyrolysis to increase the yield of light fractions of petroleum, and petroleum coke, which is obtained by calcining the petroleum coke. Furthermore, the particle size of the coke in the water slurry may be any particle size as long as it is powder, but for example, when used as boiler fuel, the coke currently burned in thermal power plants is 200 mesh pass 90. % or more, this particle size is a standard for the coke particle size. However, the thinner of the present invention is not affected by particle size and exhibits excellent effects on coke powder of any particle size.
本発明のコークス−水スラリー用減粘剤は、２％水溶液
の粘度が２５℃において１０ 、０ＯＯｃｐ以下、好ま
しくは２ 、０００ｃｐ以下であるカルボキシメチルセ
ルロース（以下ＣＭＣとする）またはその塩を必須成分
として含有するものである。The coke-water slurry thinner of the present invention contains carboxymethyl cellulose (hereinafter referred to as CMC) or a salt thereof, which has a viscosity of 2% aqueous solution at 25°C of 10,000 cp or less, preferably 2,000 cp or less, or a salt thereof as an essential component. It contains.
本発明に用いるＣＭＣまたはその塩のエーテル化度は０
．３〜３．０の範囲で水溶性ないし水分散性であればよ
い。塩としては、す１−リウム、カリウムなどのアルカ
リ金属塩、アンモニウム塩、アミン塩、およびこれらの
塩の一部がカルシウムなどのアルカリ土類金属で置換さ
れたものなどが使用できる。また、低分子量ＣＭＣ，Ｃ
ＭＣ部分中和物なども使用できる。The degree of etherification of CMC or its salt used in the present invention is 0
．． It is sufficient if it is water-soluble or water-dispersible in the range of 3 to 3.0. Examples of the salts that can be used include alkali metal salts such as 1-lium and potassium, ammonium salts, amine salts, and salts in which a portion of these salts is substituted with an alkaline earth metal such as calcium. In addition, low molecular weight CMC, C
Partially neutralized MC can also be used.
よく知られているように、ＣＭＣおよびその塩は、４−
反応媒体として水のみを用いる水媒法や、有機溶剤と水
を用いる溶媒法により、パルプを水酸化ナトリウムとモ
ノクロル酢酸またはそのアルカリ塩によりエーテル化し
て得ることができる。As is well known, CMC and its salts can be produced by reacting pulp with sodium hydroxide and monochloroacetic acid or its alkali salts by the aqueous method using only water as the reaction medium or the solvent method using an organic solvent and water. It can be obtained by etherification.
本発明の減粘剤は、２％水溶液の粘度が２５℃において
１０，０ＯＯｃｐ以下、好ましくは２，０ＯＯｃｐ以下
のＣＭＣまたはその塩のみが有効であり、これらの粘度
を有するものを得るには、適切な原料パルプを選択する
ほか、製造過程や製造後に、過酸化物、次亜ハロゲン酸
塩、過ヨウ素酸塩、二酸化窒素、その他酸化剤および紫
外線により酸化分解したり、酵素分解によって容易に粘
度調整することができる。As the viscosity reducing agent of the present invention, only CMC or a salt thereof having a viscosity of 2% aqueous solution of 10,0 OO cp or less, preferably 2,0 OO cp or less at 25° C. is effective, and in order to obtain a thinner having these viscosities, In addition to selecting an appropriate raw material pulp, during the manufacturing process or after manufacturing, it can be easily oxidized and decomposed by peroxides, hypohalites, periodates, nitrogen dioxide, other oxidizing agents, and ultraviolet light, or by enzymatic decomposition. Can be adjusted.
本発明のコークス−水スラリー用減粘剤がすぐれた効果
を発揮する理由を詳細に解明することはできないが、本
発明の減粘剤はその特殊構造により粒子表面に強固に吸
着した後、周囲の水を水和してこの水を潤滑油的作用を
有する構造に変えるため、コークス粒子は一次粒子とし
て安定し、流動性が向−上し、同時に著しい粘度低５−
下を起こすものと思われる。またＣＭＣは鎖状に沿って
多くの解離基を持つ高分子電解質であり。Although it is not possible to elucidate in detail the reason why the coke-water slurry thinner of the present invention exhibits an excellent effect, the thinner of the present invention strongly adsorbs to the particle surface due to its special structure, and then It is thought that coke particles become stable as primary particles, improve fluidity, and at the same time cause a significant decrease in viscosity. It will be done. Furthermore, CMC is a polymer electrolyte with many dissociative groups along its chain.
水溶液中では解離して高分子イオンを生じるため、物理
的特性は平均重合度、つまり水溶液の粘度に強く影響を
受ける。２％水溶液の粘度が２５℃で１０，０００ｃｐ
以下、好ましくは２，０ＯＯｃｐ以下のものだけが有効
であり、１０，０００ｃｐより大きくなると凝集作用が
生じ、本発明の目的には好ましくない。In an aqueous solution, it dissociates to produce polymer ions, so its physical properties are strongly influenced by the average degree of polymerization, that is, the viscosity of the aqueous solution. The viscosity of a 2% aqueous solution is 10,000 cp at 25°C.
Preferably, only those below 2,000 cp are effective; if it exceeds 10,000 cp, aggregation occurs and is not preferred for the purpose of the present invention.
かかる本発明の減粘剤は、コークス−水スラリーに対し
てＣＮＣまたはその塩として、０．０１〜５．０重量％
、好ましくは０．０３〜２．０重量％添加することによ
りすぐれた効果を発揮する。コークス−水スラリーの流
動性限界は、コークスの種類や粒度によって異なるが、
一般に減粘剤を添加しなければコークス濃度が５０％前
後で流動性がなくなるが、本発明の減粘剤を添加すれば
著しく粘度が低下するため、コークス濃度が６１％以上
、特に７０％以上においても流動性を有するものである
。The thinning agent of the present invention is used in an amount of 0.01 to 5.0% by weight as CNC or a salt thereof based on the coke-water slurry.
, preferably in an amount of 0.03 to 2.0% by weight, exhibits excellent effects. The fluidity limit of coke-water slurry varies depending on the type and particle size of coke, but
Generally, if a thinner is not added, fluidity will be lost when the coke concentration is around 50%, but if the thinner of the present invention is added, the viscosity decreases significantly, so the coke concentration is 61% or more, especially 70% or more. It also has fluidity.
６−
本発明の減粘剤は、他の界面活性剤と併用して使用する
こともできる。6- The thinner of the present invention can also be used in combination with other surfactants.
コークス−水スラリーの製造方法および減粘剤の添加方
法に関しては、コークスをあらかじめ乾式で粉砕した後
減粘剤水溶液中に混合する方法や、コークス−木スラリ
ーをつくった後減粘剤を添加する方法や、ミル中へコー
クス、水、減粘剤を加え、コークスを粉砕しながら混合
する方法が実施できる。Regarding the method of producing coke-water slurry and the method of adding a thinner, there are methods such as dry-pulverizing coke in advance and then mixing it into an aqueous solution of a thinner, or adding a thinner after making a coke-wood slurry. Alternatively, coke, water, and a thinning agent may be added to a mill and mixed while crushing the coke.
本発明の減粘剤は、コークスを水中に安定に分散する効
果もすぐれており、長期間、例えば１力月間静置しても
水分離を生ぜず、均質なコークス−水スラリーを保持し
ている。The thinning agent of the present invention has an excellent effect of stably dispersing coke in water, and even if it is left standing for a long period of time, for example, one month, it does not cause water separation and maintains a homogeneous coke-water slurry. There is.
このように本発明の減粘剤は、コークス−水スラリーに
対して０．０１〜５．０重量％、好ましくは０゜０３〜
２．０重量％添加するだけで、コークス−水スラリーの
粘度を著しく減少せしめ、しかも高濃度でポンプ輸送が
可能なコークス−水スラリーをつくることができる。Thus, the viscosity reducing agent of the present invention is 0.01 to 5.0% by weight, preferably 0.03 to 5.0% by weight, based on the coke-water slurry.
Adding only 2.0% by weight can significantly reduce the viscosity of the coke-water slurry and make the coke-water slurry pumpable at high concentrations.
７− 以下に実施例を示す。実施例中％重量による。7- Examples are shown below. Based on % weight in examples.
実施例
所定量の減粘剤は溶解した水溶液に、２００メツシュ９
０％パスまで粉砕したコークスを室温にてかきまぜなが
ら加え、所定濃度のコークス−水スラリーを調整する。Example: A predetermined amount of a thinner is dissolved in an aqueous solution of 200 mesh 9.
Coke crushed to 0% pass is added at room temperature with stirring to prepare a coke-water slurry of a predetermined concentration.
このスラリーの粘度を２５℃にて測定し、また流動性を
ｍ察する。The viscosity of this slurry was measured at 25° C., and the fluidity was also observed.
さらにこのスラリーを５００＋ｎ Ｑのシリンダーに１
８ａ＋＋の高さまで入れ、１力月間静置した後、上層（
上部から１個）、下層（底部から１備）のコークス濃度
を測定する。表に示すとおり、本発明の減粘剤を添加す
るとコークス濃度７４〜７７％においても粘度は７５０
〜３０００ｃｐであり、極めて流動性が良好である。ま
たスラリーは１力月間静置した後もコークス沈降がほと
んど生じておらず非常に安定である。これに対し一般の
アニオン界面活性剤を添加したり、減粘剤無添加の場合
は、コークス濃度５０％において粘度が２０，０ＯＯｃ
ｐ以上になり、全く流動しない。Furthermore, add this slurry to a cylinder of 500+n Q.
Fill it to a height of 8a++ and leave it for one month, then remove the upper layer (
Measure the coke concentration in the bottom layer (one layer from the top) and the bottom layer (one layer from the bottom). As shown in the table, when the viscosity reducer of the present invention is added, the viscosity is 750% even at a coke concentration of 74% to 77%.
~3000 cp, and has extremely good fluidity. In addition, the slurry is extremely stable with almost no coke settling even after it has been allowed to stand for one month. On the other hand, when a general anionic surfactant is added or no thinner is added, the viscosity is 20.0OOc at a coke concentration of 50%.
p or more, and there is no flow at all.
８−8-
Claims (2)
を向」ユさせるため、２％水溶液の粘度が２５℃におい
てＩｎ、０００ｃｐ以下、好ましくは２．０ＯＯｃｐ以
下であるカルボキシメチルセルロースまたはその塩を必
須成分として添加することを特徴とするコークス−水ス
ラリー用減粘剤。(1) In order to reduce the viscosity of the coke-water slurry and improve its fluidity, carboxymethyl cellulose or a salt thereof whose viscosity of a 2% aqueous solution is less than In, 000 cp, preferably less than 2.0 OO cp at 25°C is used. A thinning agent for coke-water slurry, characterized in that it is added as an essential component.
り高いコークス−水スラリーに用いるための特許請求の
範囲第（１）項記載のコークス−水スラリー用減粘剤。(2) A thinning agent for coke-water slurry according to claim (1) for use in coke-water slurry having a coke concentration of 61% or higher, preferably higher than 70%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20241682A JPS5991196A (en) | 1982-11-17 | 1982-11-17 | Viscosity reducer for highly concentrated coke/water slurry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20241682A JPS5991196A (en) | 1982-11-17 | 1982-11-17 | Viscosity reducer for highly concentrated coke/water slurry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5991196A true JPS5991196A (en) | 1984-05-25 |
Family
ID=16457139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20241682A Pending JPS5991196A (en) | 1982-11-17 | 1982-11-17 | Viscosity reducer for highly concentrated coke/water slurry |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5991196A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6078588A (en) * | 1983-10-04 | 1985-05-04 | Ajinomoto Co Inc | Improvement of flow flux of ultrafiltration |
| JPS6243489A (en) * | 1985-08-21 | 1987-02-25 | Kawasaki Heavy Ind Ltd | Aqueous slurry composition of carbonaceous solid |
-
1982
- 1982-11-17 JP JP20241682A patent/JPS5991196A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6078588A (en) * | 1983-10-04 | 1985-05-04 | Ajinomoto Co Inc | Improvement of flow flux of ultrafiltration |
| JPH0529435B2 (en) * | 1983-10-04 | 1993-04-30 | Ajinomoto Kk | |
| JPS6243489A (en) * | 1985-08-21 | 1987-02-25 | Kawasaki Heavy Ind Ltd | Aqueous slurry composition of carbonaceous solid |
| JPH0362758B2 (en) * | 1985-08-21 | 1991-09-26 | Kawasaki Jukogyo Kk |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4464353A (en) | Quicklime slaking process | |
| US3957674A (en) | Magnesium hydroxide suspension | |
| JP2004520271A5 (en) | ||
| JPS58501183A (en) | Coal-water slurry | |
| JPS5823890A (en) | Combustible coal/water fuel slurry and manufacture | |
| CN100432199C (en) | Coal additive and prepn. process | |
| ES8302081A1 (en) | Method for manufacture of non-gelling, stable inorganic salt crutcher slurries | |
| EP0191964B1 (en) | Low-viscosity coal-water slurries containing sulfonated humic acids | |
| JPS5991196A (en) | Viscosity reducer for highly concentrated coke/water slurry | |
| JPH0468249B2 (en) | ||
| JPS59152994A (en) | Viscosity reducing agent for coke and water slurry having high concentration | |
| JPS60229993A (en) | Coal-water mixture | |
| JPS5823887A (en) | Viscosity reducing agent for coal-water slurry in high concentration | |
| CN102399294A (en) | Method for producing low-substituted hydroxypropylcellulose | |
| JPS5991197A (en) | Viscosity reducer for highly concentrated coke/water slurry | |
| JPH06172764A (en) | Method for improving low-rank coal and production of coal-water mixture using the same | |
| JP3577326B2 (en) | Stabilizer for high concentration coal / water slurry | |
| JPS60120795A (en) | Dispersant for coal/water slurry | |
| CN110713388A (en) | Ceramic slurry debonder capable of reducing thixotropy of ceramic tile slurry and preparation method thereof | |
| JPH0128798B2 (en) | ||
| JPS6116986A (en) | Production of concentrated coal-water slurry | |
| JPH0237392B2 (en) | ||
| JPH0132876B2 (en) | ||
| CA1091016A (en) | Production of solid fuel-water slurries | |
| JPS63258990A (en) | Additive for high-concentration coal-water slurry having long life |