JPH04103693A - Additive for coal-water slurry - Google Patents

Additive for coal-water slurry

Info

Publication number
JPH04103693A
JPH04103693A JP2223023A JP22302390A JPH04103693A JP H04103693 A JPH04103693 A JP H04103693A JP 2223023 A JP2223023 A JP 2223023A JP 22302390 A JP22302390 A JP 22302390A JP H04103693 A JPH04103693 A JP H04103693A
Authority
JP
Japan
Prior art keywords
coal
integer
additive
styrene
water 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.)
Granted
Application number
JP2223023A
Other languages
Japanese (ja)
Other versions
JP2747522B2 (en
Inventor
Yasunobu Mizuno
水野 康伸
Haruichi Uto
宇藤 晴一
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Neos Co Ltd
Original Assignee
Neos Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Neos Co Ltd filed Critical Neos Co Ltd
Priority to JP2223023A priority Critical patent/JP2747522B2/en
Publication of JPH04103693A publication Critical patent/JPH04103693A/en
Application granted granted Critical
Publication of JP2747522B2 publication Critical patent/JP2747522B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
  • Liquid Carbonaceous Fuels (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

PURPOSE:To provide the subject additive containing a partially esterified product of a specific styrene/maleic acid copolymer, capable of stably dispersing coal powder in water at high concentration to form a dispersion having high fluidity and effective for suppressing the abrasion of especially a transportation pipe and a burner tip. CONSTITUTION:The objective additive contains a partially esterified product of a styrene/maleic acid copolymer produced by reacting (A) a styrene/maleic anhydride copolymer expressed by formula I ((l) is integer of 1-5; (m) is integer of 1-3; (n) is integer of 4-10), (B) a polyether derivative having a polyalkylene glycol chain and expressed by formula II (X is residue of a 1-4C compound having one active hydrogen atom; R is 3-8C alkylene oxide; (p) is integer of 0-10; (q) is integer of 10-200) and (C) a >=6C primary amine at molar ratios (A:B:C) of 1:(1-10):(1-3).

Description

【発明の詳細な説明】 [産業上の利用分野1 本発明は、石炭−水スラリー用添加剤、詳しくは、石炭
粉末を高濃度で、流動性良く安定に水に分散させるため
の石炭−水スラリー用添加剤に関し、特に輸送パイプや
バーナチップの摩耗を少なくする石炭−水スラリー用添
加剤に関する。
Detailed Description of the Invention [Industrial Application Field 1] The present invention is an additive for coal-water slurry, specifically, a coal-water slurry additive for stably dispersing coal powder in water with good fluidity at a high concentration. The present invention relates to additives for slurries, and in particular to additives for coal-water slurries that reduce wear on transport pipes and burner tips.

[従来の技術1 近年、石油資源の枯渇化が懸念されてきており、その代
替品として石炭が再び注目されている。しかしながら、
石炭は固体であるためハンドリングが煩雑なことや港湾
での荷揚げの際の炭塵飛散による環境汚染や貯炭時の自
然発火等の問題がある。
[Prior art 1] In recent years, there has been concern about the depletion of petroleum resources, and coal is once again attracting attention as a substitute. however,
Since coal is a solid, there are problems such as complicated handling, environmental pollution due to scattering of coal dust when unloading at a port, and spontaneous combustion during coal storage.

そのため、微粉炭を高濃度に水に分散させ流体化させた
石炭−水スラリ−(以下、rCWMJという)が、石油
と同様のハンドリングを可能にし、パイプライン輸送が
可能で、貯炭時の安定性も良く、直接燃焼できる技術と
して、一部実用化されている。
Therefore, coal-water slurry (hereinafter referred to as rCWMJ), which is made by dispersing pulverized coal in water at a high concentration and turning it into a fluid, can be handled in the same way as oil, can be transported by pipeline, and has stable coal storage properties. This technology has been put into practical use in some areas as a direct combustion technology.

CWMは、分散微粉炭濃度が高いこと、かつ流動性及び
安定性lこ優れたものであることが求められ、該特性を
付与するために種々の添加剤が開発されているが、CW
Mの実用化に際して、小規模なパイロットプラントにお
ける試験段階では考えられなかった問題が明らかになっ
てきた。
CWM is required to have a high concentration of dispersed pulverized coal and excellent fluidity and stability, and various additives have been developed to provide these characteristics.
When putting M into practical use, problems that were unthinkable at the testing stage in small-scale pilot plants have come to light.

例えばCWM用添加剤として、ナフタレンスルホン酸塩
やそのホルマリン縮金物(特開昭5621636号公報
)、ポリジシクロペンタジュンスルホン酸塩(特開昭6
0〜96689号公報)やポリスチレンスルホン酸塩(
特開昭57−145187号公報)などのアニオン系添
加剤を使用したCWMは、パイプラインやバーナチップ
の摩耗が激しいため実用段階で問題となっている。
For example, as additives for CWM, naphthalene sulfonate and its formalin condensate (Japanese Unexamined Patent Publication No. 5,621,636), polydicyclopentadine sulfonate (Japanese Unexamined Patent Publication No. 1983)
0 to 96689) and polystyrene sulfonate (
CWM using anionic additives such as those disclosed in Japanese Patent Application Laid-open No. 57-145187) poses a problem in practical use because pipelines and burner tips are subject to severe wear.

またポリアルキレンイミンのアルキレンオキシド付加物
(特開昭58−49795号公報)やポリエーテルポリ
オール型の非イオン系添加剤(特開昭57−56034
号公報)を使用したCWMは摩耗は比較的少ないが、高
温下に保持すると粘度が上昇し、パイプライン輸送でき
なくなるという欠点がある。さらに該添加剤を使用(ま
たCWMは安定性が不十分である。例えば1ケ月間静置
すると微粉炭が沈降して自己流動性を失った凝集物が生
じ、貯蔵タンクからの排出が不能になる。
Also, alkylene oxide adducts of polyalkyleneimine (Japanese Patent Application Laid-open No. 58-49795) and polyether polyol type nonionic additives (Japanese Patent Application Laid-Open No. 57-56034)
Although the CWM using the above-mentioned CWM has relatively little wear, it has the disadvantage that when kept at high temperatures, the viscosity increases, making it impossible to transport by pipeline. Furthermore, the use of such additives (and CWM is insufficiently stable. For example, if left undisturbed for a month, the pulverized coal will settle and form agglomerates that have lost their self-flowing properties, making it impossible to discharge them from the storage tank. Become.

スチレン−マレイン酸共重合体の半エステルケン化物(
特開昭61〜225284号公報)は、親木基がカルボ
ン酸塩のみであるため、該添加剤を使用したCWMは、
分散性が悪く、高濃度化できない。
Saponified half ester of styrene-maleic acid copolymer (
JP-A No. 61-225284), since the parent wood group is only carboxylate, CWM using this additive is
It has poor dispersibility and cannot be highly concentrated.

また、スルホン化スチレン−無水マレイン酸共重合体の
塩(特開昭58−42694号および特開昭61〜22
1296号公報)を使用したCWMは安定性が悪い。
In addition, salts of sulfonated styrene-maleic anhydride copolymer (JP-A-58-42694 and JP-A-61-22
1296) has poor stability.

[発明が解決しようとする課題1 本発明は、高濃度化性、流動性および分散安定性に優れ
るとともに、輸送パイプの摩耗の少ないCWMの製造を
可能にする添加剤を提供することを目的とする。
[Problem to be Solved by the Invention 1] The purpose of the present invention is to provide an additive that has excellent concentration properties, fluidity, and dispersion stability, and enables the production of CWM with less wear on transport pipes. do.

[課題を解決するだめの手段〕 本発明は、下記の(A)成分、(B)成分および(C)
成分を反応させて得られるスチレン−マレイン酸コポリ
マーの部分エステル化物を含有する石炭−水スラリー用
添加剤に関する。
[Means for solving the problem] The present invention comprises the following components (A), (B) and (C).
The present invention relates to an additive for coal-water slurry containing a partially esterified product of a styrene-maleic acid copolymer obtained by reacting components.

(A)成分は、下記一般式(1)で示されるスチレン−
無水マレイン酸コポリマーである。
Component (A) is styrene represented by the following general formula (1).
It is a maleic anhydride copolymer.

(式中、Qはl−5、mは1〜3、nは4〜10の整数
を表わす) 該コポリマーはランダムコポリマー又はブロックコポリ
マーのいずれであってもよい。該コポリマーの数平均分
子量が1000〜9000、好ましくは1500〜30
00である。上記の一般式(1)中、Qはスチレン単位
数を表わし1〜5の整数であり、mは無水マレイン酸単
位数を表わし1〜3の整数であるが、好ましくはQ/m
=3/1〜】/1である。nは4〜10、好ましくは6
〜8の整数である。
(In the formula, Q represents 1-5, m represents an integer of 1 to 3, and n represents an integer of 4 to 10.) The copolymer may be either a random copolymer or a block copolymer. The number average molecular weight of the copolymer is 1000 to 9000, preferably 1500 to 30.
It is 00. In the above general formula (1), Q represents the number of styrene units and is an integer of 1 to 5, and m represents the number of maleic anhydride units and is an integer of 1 to 3, preferably Q/m
=3/1~]/1. n is 4 to 10, preferably 6
It is an integer of ~8.

(B)成分は、下記一般式(2)で示されるポリアルキ
レングリコール鎖を有するポリエーテルM導体である。
Component (B) is a polyether M conductor having a polyalkylene glycol chain represented by the following general formula (2).

X(R)p(CzH+0)qH(2) (式中、Xは炭素原子数1〜4の活性水素を1個有する
化合物の残基、Rは炭素原子数3〜8のアルキレンオキ
シド基、pは0〜10.Qは]、0〜200の整数を表
わす) 該ポリエーテル誘導体はスチレン−マレイン酸コポリマ
ーの部分エステル化物に親水性を付与するものである。
X(R)p(CzH+0)qH(2) (wherein, X is a residue of a compound having one active hydrogen having 1 to 4 carbon atoms, R is an alkylene oxide group having 3 to 8 carbon atoms, p Q represents an integer from 0 to 200) The polyether derivative imparts hydrophilicity to the partially esterified product of the styrene-maleic acid copolymer.

炭素原子数1〜4の活性水素を1個有する化合物として
は、メチルアルコール、エチルアルコール、イソプロピ
ルアルコール、アリルアルコール、tert−ブチルア
ルコールなどのアルコール類やギ酸、酢酸、プロピオン
酸などのカルボン酸類やメタンチオール、エタンチオー
ルなどのメルカプタン類が挙げられる。上記−数式(2
)中、pはアルキレンオキシドの平均付加モル数を表わ
し、qはエチレンオキシドの平均付加モル数を表わす。
Examples of compounds having one active hydrogen having 1 to 4 carbon atoms include alcohols such as methyl alcohol, ethyl alcohol, isopropyl alcohol, allyl alcohol, and tert-butyl alcohol, carboxylic acids such as formic acid, acetic acid, and propionic acid, and methane. Examples include mercaptans such as thiol and ethanethiol. Above − Formula (2
), p represents the average number of moles of alkylene oxide added, and q represents the average number of moles of ethylene oxide added.

pは0−10、好ましくは0〜5の整数であり、方qは
10〜200、好ましくは20〜150の整数である。
p is an integer of 0-10, preferably 0-5, and q is an integer of 10-200, preferably 20-150.

qが10未満では水溶性のスチレンマレイン酸コポリマ
ーの部分エステル化物が得難く、200を越えるとCW
Mの流動性が悪くなる。
When q is less than 10, it is difficult to obtain a partially esterified water-soluble styrene-maleic acid copolymer, and when it exceeds 200, CW
The fluidity of M deteriorates.

(C)成分は炭素原子数6以上の第1級アミン類である
。該第1級アミンはスチレン−無水マレイン酸コポリマ
ーに主としてイミド結合して疎水基を付与するものであ
る。(C)成分の第1級アミン類としては、炭素原子数
6以上、好ましくは8以上のアミン類、例えばオクチル
アミン、ラウリルアミン、ステアリルアミンなどの脂肪
族アミンやオレイルアミンなどの不飽和結合を持ったア
ミンやベンジルアミン、アニリンなどの芳香族アミンな
どが例示される。
Component (C) is a primary amine having 6 or more carbon atoms. The primary amine primarily binds with imide bonds to the styrene-maleic anhydride copolymer to provide hydrophobic groups. The primary amines of component (C) include amines having 6 or more carbon atoms, preferably 8 or more carbon atoms, such as aliphatic amines such as octylamine, laurylamine, and stearylamine, and those having unsaturated bonds such as oleylamine. Examples include aromatic amines such as aromatic amines, benzylamine, and aniline.

(A)成分、(B)成分および(C)成分の反応モル比
は、 (A):(B):(C)=1:(1〜10)+(1〜3
)である。
The reaction molar ratio of component (A), component (B) and component (C) is (A):(B):(C)=1:(1-10)+(1-3
).

本発明のスチレン−マレイン酸コポリマーの部分エステ
ル化物中の(B)成分の含有率は50〜95重量%、(
C)成分は2〜20重量%であることが好ましい。(B
)成分が50重量%未満ではスチレン−マレイン酸コポ
リマーの部分エステル化物は水に溶解し難く、一方95
重量%より多いとCWMの分散性能が劣る(C)成分は
2重量%未満ではCWMの分散性が劣り、20重量%よ
り多いと水に溶解し難い。
The content of component (B) in the partially esterified product of the styrene-maleic acid copolymer of the present invention is 50 to 95% by weight, (
Component C) is preferably 2 to 20% by weight. (B
) component is less than 50% by weight, the partially esterified product of styrene-maleic acid copolymer is difficult to dissolve in water;
If the amount of component (C) is more than 2% by weight, the dispersibility of CWM is poor. If the component (C) is less than 2% by weight, the dispersibility of CWM is poor, and if it is more than 20% by weight, it is difficult to dissolve in water.

(A)成分、(B)成分および/または(C)成分の反
応はメチルエチルケトン、メチルイソブチルケトン、ジ
オキサンなどの溶媒中で還流下に行ってもよく、溶媒を
用いず窒素気流下に120〜180°Cで反応させるこ
ともできる。(A)成分と(B)成分のエステル化反応
は無触媒でも行うことがでキル力、パラトルエンスルホ
ン酸などの触媒を用いてもよい。(A)成分と(C)成
分のイミド化反応、またはアミド化反応も同様である。
The reaction of component (A), component (B) and/or component (C) may be carried out under reflux in a solvent such as methyl ethyl ketone, methyl isobutyl ketone, dioxane, etc. The reaction can also be carried out at °C. The esterification reaction between component (A) and component (B) can be carried out without a catalyst, and a catalyst such as kill force or para-toluenesulfonic acid may be used. The same applies to the imidization reaction or amidation reaction between component (A) and component (C).

また(A)、(B)及び(C)成分を同時に反応させる
こともできる。
It is also possible to react components (A), (B) and (C) simultaneously.

このようにして得たスチレン−マレイン酸コポリマーの
部分エステル化物はいくらかカルボン酸類を残すので、
ナトリウム、カリウム、アンモニウムなどの塩とするこ
ともできる。
The partially esterified styrene-maleic acid copolymer thus obtained leaves some carboxylic acids;
It can also be a salt of sodium, potassium, ammonium, etc.

このようにして製造されるスチレン−マレイン酸コポリ
マーの部分エステル化物の数平均分子量は5000〜5
0000、好ましくは8000〜30000である。数
平均分子量が5000より少ないと微粉炭の分散安定性
が悪く、沈降し易く、一方50000より大きいと凝集
し、自己流動性を失う。
The number average molecular weight of the partially esterified styrene-maleic acid copolymer thus produced is 5,000 to 5.
0,000, preferably 8,000 to 30,000. When the number average molecular weight is less than 5,000, the dispersion stability of the pulverized coal is poor and it tends to settle, while when it is greater than 50,000, it aggregates and loses its self-flowing properties.

本発明のCWM用添加剤は他の分散剤と一緒に用いても
よい。併用可能な他の分散剤としては、ナフタレンスル
ホン酸のホルマリン縮合物の塩、シンクロペンタジェン
スルホン酸塩の重合体、ポリスチレンスルホン酸塩など
のアニオン系分散剤やアルキルフェノールエチレンオキ
シド付加物、アルキルフェノールホルマリン縮金物のエ
チレンオキシド付加物などの非イオン系分散剤など種々
の分散剤が挙げられる。
The CWM additive of the present invention may be used in conjunction with other dispersants. Other dispersants that can be used in combination include salts of formalin condensates of naphthalene sulfonic acid, polymers of synchlopentadiene sulfonates, anionic dispersants such as polystyrene sulfonates, alkylphenol ethylene oxide adducts, and alkylphenol formalin condensates. Various dispersants may be mentioned, such as nonionic dispersants such as ethylene oxide adducts.

かかる本発明のCWM用添加剤の使用量は石炭の粒度に
よって異なるが、石炭粒度が200メツ/ユ80重量%
バスの場合で、通常対石炭粉末0゜l〜2,0重量%、
好ましくは0.3〜1.0重量%である。
The amount of the CWM additive of the present invention to be used varies depending on the particle size of the coal, but when the particle size of the coal is 200 M/U80% by weight,
In the case of buses, usually 0°l to 2.0% by weight of coal powder,
Preferably it is 0.3 to 1.0% by weight.

本発明のCWM用添加剤は予め水に溶解した上でこれに
微粉炭を加えてもよく、微粉炭と水の混合物に後から加
えてもよい。また混成粉砕の場合のように石炭を粉砕す
ると同時に水ととも−に加えてもよい。
The CWM additive of the present invention may be dissolved in water in advance and pulverized coal may be added thereto, or it may be added afterwards to a mixture of pulverized coal and water. Alternatively, as in the case of mixed pulverization, the coal may be added to the coal together with water at the same time as the coal is pulverized.

本発明の添加剤を用いてスラリー化させる石炭粉末とし
ては、粒径14m以下のものが適しているが、これに限
定されるものではない。石炭の種類は瀝青炭、亜瀝青炭
、褐炭等各種の石炭および産地のものが挙げられる。ま
たオイルアグロメレーション法や浮遊選炭法などにより
、脱灰した石炭にも本発明添加剤は適用できる。
The coal powder to be slurried using the additive of the present invention has a particle size of 14 m or less, but is not limited thereto. Types of coal include various types of coal such as bituminous coal, sub-bituminous coal, lignite, etc., and coals from various production areas. The additive of the present invention can also be applied to coal that has been deashed by oil agglomeration, flotation, etc.

[作用] 本発明のCWM用添加剤が優れた効果を示す理由は次の
ように考えられる。まず水に溶解した添加剤がいくらか
石炭表面に吸着する。吸着した添加剤は比較的長いポリ
オキシエチレン鎖をいくつか持つポリマーであるので、
ポリマーの体積制限効果、浸透圧効果が働いて立体安定
化による反発作用を生じたり、粒子間にある水に溶解し
たポリマーの圧縮反発作用によって微粉炭が分散安定化
されるものと考えられる。
[Effect] The reason why the CWM additive of the present invention exhibits excellent effects is considered to be as follows. First, some of the additive dissolved in water is adsorbed onto the coal surface. Since the adsorbed additive is a polymer with several relatively long polyoxyethylene chains,
It is thought that the volume-limiting effect and osmotic pressure effect of the polymer work to produce a repulsive effect due to steric stabilization, and that the pulverized coal is dispersed and stabilized by the compressive repulsive effect of the polymer dissolved in water between the particles.

また本添加剤はいくらかカルボキシル基を持つので若干
アニオン性も示し、微粉炭粒子−水界面での電気2重層
間の反発相互作用によっても分散安定化される。
Furthermore, since this additive has some carboxyl groups, it also exhibits some anionic properties, and its dispersion is stabilized by the repulsive interaction between the electric double layer at the pulverized coal particle-water interface.

さらに、吸着したポリマーにより微粉炭が弱い凝集ネッ
トワーク構造が形成され、長期間にわたって安定性を維
持できるものと考えられる。
Furthermore, it is thought that the adsorbed polymer causes the pulverized coal to form a weak cohesive network structure, allowing it to maintain stability over a long period of time.

また潤滑性については水中に存在するポリマー分子が粒
子同士の接近にともなって圧縮されるとき反発力となり
、粒子同士のすべりを円滑にしてバイブやバーナチップ
の摩耗を軽減するものと考えられる。
Regarding lubricity, it is thought that when the polymer molecules present in the water are compressed as the particles approach each other, a repulsive force is generated, which smoothes the sliding between the particles and reduces wear on the vibrator and burner tip.

[実施例] 以下、本発明を実施例よりさらに詳細に説明するが、本
発明はこれら実施例に限定されるものではない。
[Examples] Hereinafter, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited to these Examples.

実施例1〜9および比較例1および2 表−1に示す配合鬼方によって、各種の添加剤を製造し
た。
Examples 1 to 9 and Comparative Examples 1 and 2 Various additives were manufactured according to the formulations shown in Table 1.

5001IIQの容器に所定量(表−2)の添加剤と水
とを入れ溶解した後、200メツシュパス80重量%に
粉砕調製したワークワース炭(オーストラリア産瀝青炭
)を撹拌しながら徐々に投入した。
A predetermined amount of additives (Table 2) and water were put into a 5001IIQ container and dissolved, and then Warkworth coal (Australian bituminous coal) pulverized to 80% by weight of 200 mesh pass was gradually added while stirring.

投入後lO分間混合した後、ホモミキサー(特殊機化工
社製「オートホモミキサー」)により4000 rpm
で10分間混合し、石炭−水スラリーを調製した。
After mixing for 10 minutes after adding, mix at 4000 rpm with a homo mixer (“Auto Homo Mixer” manufactured by Tokushu Kikako Co., Ltd.)
and mixed for 10 minutes to prepare a coal-water slurry.

得られた石炭−水スラリーの石炭濃度、代表粘度、沈降
凝集量を測定した結果を表−2に、又、ディスクの摩耗
減量を表−3に示す。
Table 2 shows the results of measuring the coal concentration, representative viscosity, and amount of sedimentation and agglomeration of the obtained coal-water slurry, and Table 3 shows the wear loss of the disk.

各測定は以下の方法によった。Each measurement was performed using the following method.

(1)石炭濃度(重量%):乾燥減水量より求めた。(1) Coal concentration (wt%): Determined from the amount of water loss on drying.

(2)代表粘度(IIIPa−5):ハーケ社製「レオ
メータ−」でレオグラムを測定し、すり 速度1005ec−’の粘度を求 めIこ。
(2) Representative viscosity (IIIPa-5): Measure the rheogram with a "rheometer" manufactured by Haake Co., Ltd., and determine the viscosity at a slip rate of 1005 ec-'.

(3)沈降凝集量(重量%)二石炭−水スラリ−300
gを250mffのポットに入 れ、そのまま静置し、2週間 後このポットを逆さまにし、 自己流動しないでポット底に 残存した量を測定した。
(3) Amount of sedimentation and flocculation (wt%) 2 coal-water slurry - 300
g was placed in a 250 mff pot, left as it was, and after 2 weeks, the pot was turned upside down and the amount remaining at the bottom of the pot without self-flowing was measured.

(4)ディスクの摩耗減量(+11g)二石炭−水スラ
リ−500gを容器に入れ、5(1+ TR〆×2闘の銅版ディスクを 浸漬して2000rpmX20 時間回転させることにより、 該ディスクの摩耗による減量 を求めt二。
(4) Disc abrasion loss (+11 g) Put 500 g of two-coal-water slurry into a container, immerse a 5 (1+ TR〆 x 2) copper plate disk, and rotate it at 2000 rpm for 20 hours to reduce the abrasion loss of the disk. Find t2.

比較例3〜6 表−1に示す添加剤を用いて、実施例1〜9および比較
例1および2と同様にして石炭−水スラリーを調製し、
石炭濃度、代表粘度、沈降凝集量およびディスクの摩耗
減量を測定した。結果を表2および表−3に示す。
Comparative Examples 3 to 6 Coal-water slurries were prepared in the same manner as Examples 1 to 9 and Comparative Examples 1 and 2 using the additives shown in Table 1,
Coal concentration, representative viscosity, amount of sedimentation and flocculation, and disc wear loss were measured. The results are shown in Tables 2 and 3.

表 表からも明らかなように、本発明の添加剤を用いた石炭
−水スラリーは、石炭濃度が高いこと、粘度が低く流動
性、スラリー化性に優れていること、沈降凝集量が少な
く安定性に優れていること、そして、ディスクの摩耗減
量が少なく潤滑性にも優れていることがわかる。
As is clear from the table, the coal-water slurry using the additive of the present invention has a high coal concentration, low viscosity and excellent fluidity and slurrying property, and is stable with a small amount of sedimentation and agglomeration. It can be seen that the disc has excellent lubricity, with little loss of wear due to disc wear.

[発明の効果] 本発明のCWM用添加剤は主として減水効果に寄与して
おり、該添加剤を使用することによりCWM中の微粉炭
濃度を従来に比べてlO〜20重量%上げることができ
る。またCWMの流動性を良くし、かつ微粉炭の沈降分
離や凝集を抑制して長時間安定性を維持することができ
、ざらにCWMの潤滑性を高めて輸送パイプやバーナチ
ップの摩耗を軽減できる。
[Effect of the invention] The additive for CWM of the present invention mainly contributes to the water reduction effect, and by using the additive, the pulverized coal concentration in CWM can be increased by 10 to 20% by weight compared to the conventional one. . In addition, it improves the fluidity of CWM and suppresses sedimentation and agglomeration of pulverized coal to maintain stability for a long time.It also improves the lubricity of CWM and reduces wear on transport pipes and burner tips. can.

Claims (1)

【特許請求の範囲】 1、下記の(A)成分、(B)成分および(C)成分を
反応させて得られるスチレン−マレイン酸コポリマーの
部分エステル化物を含有する石炭−水スラリー用添加剤
: (A)一般式(1)で示されるスチレン−無水マレイン
酸コポリマー ▲数式、化学式、表等があります▼(1) (式中、aは1〜5、mは1〜3、nは4〜10の整数
を表わす)、 (B)一般式(2)で示されるポリアルキレングリコー
ル鎖を有するポリエーテル誘導体 X(R)p(C_2H_4O)qH(2) (式中、Xは炭素原子数1〜4の活性水素を1個有する
化合物の残基、Rは炭素原子数3〜8のアルキレンオキ
シド基、pは0〜10、qは10〜200の整数を表わ
す)、 (C)炭素原子数6以上の第1級アミン類。 2、(A)、(B)および(C)の各成分の反応モル比
が(A):(B):(C)=1:(1〜10):(1〜
3)である請求項1記載の石炭−水スラリー用添加剤。 3、スチレン−マレイン酸コポリマーの部分アミド・イ
ミドおよび部分エステル化物の数平均分子量が5000
〜50000である請求項1記載の石炭−水スラリー用
添加剤。
[Claims] 1. An additive for coal-water slurry containing a partially esterified styrene-maleic acid copolymer obtained by reacting the following components (A), (B) and (C): (A) Styrene-maleic anhydride copolymer represented by general formula (1) ▲ Numerical formulas, chemical formulas, tables, etc. are available ▼ (1) (In the formula, a is 1 to 5, m is 1 to 3, n is 4 to 10), (B) Polyether derivative X(R)p(C_2H_4O)qH(2) having a polyalkylene glycol chain represented by the general formula (2) (wherein, X represents a carbon atom number of 1 to (C) residue of a compound having one active hydrogen of 4, R is an alkylene oxide group having 3 to 8 carbon atoms, p is 0 to 10, and q is an integer of 10 to 200), (C) 6 carbon atoms The above primary amines. 2. The reaction molar ratio of each component (A), (B) and (C) is (A):(B):(C)=1:(1-10):(1-
3) The additive for coal-water slurry according to claim 1. 3. The number average molecular weight of the partially amide/imide and partially esterified styrene-maleic acid copolymer is 5000.
The additive for coal-water slurry according to claim 1, which has a molecular weight of 50,000 to 50,000.
JP2223023A 1990-08-23 1990-08-23 Additive for coal-water slurry Expired - Fee Related JP2747522B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2223023A JP2747522B2 (en) 1990-08-23 1990-08-23 Additive for coal-water slurry

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2223023A JP2747522B2 (en) 1990-08-23 1990-08-23 Additive for coal-water slurry

Publications (2)

Publication Number Publication Date
JPH04103693A true JPH04103693A (en) 1992-04-06
JP2747522B2 JP2747522B2 (en) 1998-05-06

Family

ID=16791628

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2223023A Expired - Fee Related JP2747522B2 (en) 1990-08-23 1990-08-23 Additive for coal-water slurry

Country Status (1)

Country Link
JP (1) JP2747522B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103351451A (en) * 2013-05-21 2013-10-16 陕西省能源化工研究院 Ternary copolymer coal water slurry dispersing agent and application thereof
CN104593103A (en) * 2014-12-29 2015-05-06 上海海乔化工有限公司 Additive for water coal slurry
CN110938172A (en) * 2018-09-25 2020-03-31 财团法人工业技术研究院 Modified copolymer, method for producing same, and method for producing slurry

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102504893A (en) * 2011-11-01 2012-06-20 江西和谷纳米材料技术有限公司 Polystyrene-maleic anhydride derivative water-coal-slurry additive and preparation method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103351451A (en) * 2013-05-21 2013-10-16 陕西省能源化工研究院 Ternary copolymer coal water slurry dispersing agent and application thereof
CN104593103A (en) * 2014-12-29 2015-05-06 上海海乔化工有限公司 Additive for water coal slurry
CN104593103B (en) * 2014-12-29 2016-04-20 上海海乔化工有限公司 A kind of additive for coal water slurry
CN110938172A (en) * 2018-09-25 2020-03-31 财团法人工业技术研究院 Modified copolymer, method for producing same, and method for producing slurry
CN110938172B (en) * 2018-09-25 2022-11-22 财团法人工业技术研究院 Modified copolymer, method for producing same, and method for producing slurry

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