JP2747521B2 - Additive for coal-water slurry - Google Patents
Additive for coal-water slurryInfo
- Publication number
- JP2747521B2 JP2747521B2 JP2223022A JP22302290A JP2747521B2 JP 2747521 B2 JP2747521 B2 JP 2747521B2 JP 2223022 A JP2223022 A JP 2223022A JP 22302290 A JP22302290 A JP 22302290A JP 2747521 B2 JP2747521 B2 JP 2747521B2
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- Prior art keywords
- coal
- additive
- integer
- water slurry
- cwm
- 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.)
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- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 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] The present invention relates to a coal-water slurry additive, and more particularly, to a coal-water slurry for dispersing coal powder in water at a high concentration and with good fluidity and stability. The present invention relates to additives for slurries, and particularly to additives for coal-water slurries that reduce wear of transport pipes and burner chips.
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。In recent years, there has been a concern about depletion of petroleum resources, and coal has attracted attention again as a substitute. However, since coal is a solid, handling is complicated, there are problems such as environmental pollution due to scattering of coal dust at the time of unloading at a port and spontaneous ignition at the time of 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−水スラリー(以下、「CWM」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、貯蔵時の安定性も良く、直接燃焼できる技術と
して、一部実用化されている。As a result, coal-water slurry (hereinafter referred to as “CWM”) made by dispersing pulverized coal in water at a high concentration and making it fluid can be handled in the same way as petroleum, can be transported by pipeline, and is stable during storage. Some of them have been put to practical use as a technology that has good performance and can directly burn.
CWMは、分散微粉炭濃度が高いこと、かつ流動性及び
安定性に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、CWM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 to be excellent in fluidity and stability, and various additives have been developed to impart such properties. At the same time, problems that had not been conceived at the test stage in a small pilot plant became apparent.
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合物(特開昭56−21636号公報)、
ポリジシクロペンタジエンスルホン酸塩(特開昭60−96
689号公報)やポリスチレンスルホン酸塩(特開昭57−1
45187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 an additive for CWM, naphthalene sulfonate and its formalin condensate (JP-A-56-21636),
Polydicyclopentadiene sulfonate (JP-A-60-96)
No. 689) and polystyrene sulfonate (JP-A-57-1)
CWM using anionic additives such as 45187
Is a problem at the practical stage due to severe wear of pipelines and burner tips.
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した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。CWM using an alkylene oxide adduct of polyalkyleneimine (JP-A-58-49795) and a polyether polyol type nonionic additive (JP-A-57-56034) have relatively little wear. However, there is a drawback that if the temperature is maintained at a high temperature, the viscosity increases and the pipeline cannot be transported. Furthermore, the stability of CWM using said additives is insufficient. For example, if left undisturbed for one month, the pulverized coal sediments to form agglomerates that have lost their self-fluidity, and cannot be discharged from the storage tank.
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)は親水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。The half-ester saponified styrene-maleic acid copolymer (Japanese Patent Application Laid-Open No. 61-225284) has only a carboxylate as a hydrophilic group, and therefore CWM using the additive has poor dispersibility and high concentration. Can not.
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61−221296号公
報)を使用したCWMは安定性が悪い。CWM using a sulfonated styrene-maleic anhydride copolymer salt (JP-A-58-42694 and JP-A-61-221296) has poor stability.
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。An object of the present invention is to provide an additive which is excellent in high concentration property, fluidity and dispersion stability, and enables the production of CWM with less abrasion of a transport pipe.
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。The present invention relates to a coal-water slurry additive containing a partially esterified styrene-maleic acid copolymer obtained by reacting the following components (A), (B) and (C).
(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。The component (A) is a styrene-maleic anhydride copolymer represented by the following general formula (1).
(式中、lは1〜5、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
分子量は1000〜9000、好ましくは1500〜3000である。上
記一般式(1)中、l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l/m=3/1〜1/1であ
る。nは4〜10、好ましくは6〜8の整数である。 (In the formula, 1 represents an integer of 1 to 5, m represents an integer of 1 to 3, and n represents an integer of 4 to 10.) The copolymer may be a random copolymer or a block copolymer. The number average molecular weight of the copolymer is between 1000 and 9000, preferably between 1500 and 3000. In the general formula (1), 1 represents the number of styrene units, and 1 to 5
M is the number of maleic anhydride units, and 1
And is preferably an integer of 1 to 3, preferably 1 / m = 3/1 to 1/1. n is an integer of 4 to 10, preferably 6 to 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誘導体であ
る。The component (B) is a polyether derivative having a polyalkylene glycol chain represented by the following general formula (2).
X(R)p(C2H4O)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) 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 (C 2 H 4 O) qH (2) (wherein, X is a residue of a compound having one active hydrogen having 1 to 4 carbon atoms, and R is an alkylene having 3 to 8 carbon atoms) (The oxide group, p represents an integer of 0 to 10 and q represents an integer of 10 to 200.) The polyether derivative imparts hydrophilicity to a partially esterified 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、t−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、ジメチルアミン、ジエチルアミンの
などの2級アミン、メタンチオール、エタンチオールな
どのメルカプタン類等が挙げられる。上記一般式(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。
pは0〜10、好ましくは0〜5の整数であり、qは10〜
200、好ましくは20〜150の整数である。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
ル化物は得られず、200を越えるとCWMの分散安定性が悪
くなる。Examples of the compound having one active hydrogen having 1 to 4 carbon atoms include alcohols such as methyl alcohol, ethyl alcohol, isopropyl alcohol, allyl alcohol, and t-butyl alcohol; carboxylic acids such as formic acid, acetic acid, and propionic acid; Examples thereof include secondary amines such as amine and diethylamine, and mercaptans such as methanethiol and ethanethiol. The above general formula (2)
In the formula, p represents the average addition mole number of the alkylene oxide, and q represents the average addition mole number of the ethylene oxide.
p is an integer of 0 to 10, preferably 0 to 5, and q is 10 to
It is an integer of 200, preferably 20-150. If q is less than 10, no water-soluble partially esterified styrene-maleic acid copolymer can be obtained, and if it exceeds 200, the dispersion stability of CWM deteriorates.
(C)成分は、炭素原子数6以上のアルコール類であ
る。該アルコール類はスチレン−マレイン酸コポリマー
の部分エステル化物に親油性を付与するものである。該
アルコール類としては、炭素原子数6以上、好ましくは
8以上のアルコール類、例えばn−ヘキサノール、ラウ
リルアルコール、ステアリルアルコール、2−エチルヘ
キサノール、シクロヘキサノール、ベンジルアルコー
ル、C12〜C14の第2級アルコール、ヤシ油脂肪酸還元ア
ルコールなどが挙げられる。またこれらにアルキレンオ
キシドを数モル付加した化合物も使用できる。The component (C) is an alcohol having 6 or more carbon atoms. The alcohols impart lipophilicity to the partially esterified styrene-maleic acid copolymer. Examples of the alcohols include alcohols having 6 or more, preferably 8 or more carbon atoms, for example, n-hexanol, lauryl alcohol, stearyl alcohol, 2-ethylhexanol, cyclohexanol, benzyl alcohol, C 12 -C 14 second alcohol. Grade alcohol, coconut oil fatty acid reduced alcohol, and the like. Compounds obtained by adding several moles of an alkylene oxide to these can also be used.
(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):(1〜5)
である。(B)成分のモル比は、(B)成分のポリエチ
レングリコール鎖が大きいときは少なく、一方、ポリエ
チレングリコール鎖が小さいときは大きくすることが好
ましい。すなわち、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50〜98重量
%であることが好ましい。(B)成分の含有率が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、98重量%より多いと
CWMの分散性能が劣る。The reaction molar ratio of component (A), component (B) and component (C) is (A) :( B) :( C) = 1: (1-10) :( 1-5)
It is. The molar ratio of the component (B) is preferably small when the polyethylene glycol chain of the component (B) is large, and is large when the polyethylene glycol chain is small. That is, the content of the component (B) in the partially esterified styrene-maleic acid copolymer is preferably 50 to 98% by weight. If the content of the component (B) is less than 50% by weight, the partially esterified styrene-maleic acid copolymer is hardly soluble in water, while if it is more than 98% by weight.
Poor dispersion performance of CWM.
(A)成分、(B)成分および(C)成分のエステル
化反応は通常の方法、例えば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
に反応させる方法、溶媒を用いず窒素気流下に120〜180
℃で反応させる方法等を採用することができる。半エス
テル化反応を採用する場合は無触媒でも反応させること
ができるが、反応を速めるために通常パラトルエンスル
ホン酸などの触媒を用いるのが好ましい。The esterification reaction of the component (A), the component (B) and the component (C) is carried out by a usual method, for example, a method in which the reaction is carried out in a solvent such as methyl ethyl ketone, methyl isobutyl ketone or dioxane under reflux, or under a nitrogen stream without using a solvent. From 120 to 180
A method in which the reaction is carried out at a temperature of ° C can be employed. When a half esterification reaction is employed, the reaction can be carried out without a catalyst, but a catalyst such as p-toluenesulfonic acid is usually preferably used to accelerate the reaction.
このようにして得られたスチレン−マレイン酸コポリ
マーの部分エステル化物は、カルボキシル基がいくらか
残るので、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 may be a salt of sodium, potassium, ammonium or the like, since some carboxyl groups remain.
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5000〜1000
00、好ましくは8000〜50000である。数平均分子量が500
0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100000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 produced in this manner is from 5000 to 1000.
00, preferably 8000 to 50000. Number average molecular weight is 500
If it is less than 0, the dispersion stability of the pulverized coal is poor, and it tends to settle, while if it is more than 100,000, it is agglomerated and loses its self-flowability.
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
ン酸塩ホルマリン縮合物、ポリジシクロペンタジエンス
ルホン酸塩、ポリスチレンスルホン酸塩などのアニオン
分散剤やポリオキシエチレンアルキルフェニルエーテル
やそのホルマリン縮合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 additive for CWM of the present invention may be used together with other dispersants. Other dispersants that can be used in combination include anionic dispersants such as naphthalene sulfonate formalin condensate, polydicyclopentadiene sulfonate, and polystyrene sulfonate; and nonionics such as polyoxyethylene alkylphenyl ether and its formalin condensate. Various dispersants, such as a dispersant, are mentioned.
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メッシュ80重量%パス
の場合で通常対石炭粉末0.1〜2.0重量%、好ましくは0.
3〜1.0重量%である。Although the amount of the additive for CWM of the present invention varies depending on the particle size of the coal, it is generally 0.1 to 2.0% by weight, preferably 0.1% by weight, based on a coal particle size of 200 mesh 80% by weight pass.
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。また湿式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 additive for CWM of the present invention may be dissolved in water in advance and pulverized coal added thereto, or may be added later to a mixture of pulverized coal and water. Also, as in the case of wet pulverization, coal may be pulverized and added together with water.
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1mm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。As the coal powder to be slurried using the additive of the present invention, one having a particle size of 1 mm or less is suitable, but not limited thereto. Examples of the type of coal include various types of coal such as bituminous coal, subbituminous coal, and lignite, and those of the locality of production.
The additive of the present invention can also be applied to coal decalcified by an oil agglomeration method or a flotation method.
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。The reason why the additive for CWM of the present invention exhibits excellent effects is considered as follows. First, some additive dissolved in water adsorbs on the coal surface. Since the adsorbed additive is a polymer with several relatively long polyoxyethylene chains,
It is considered that the volume restriction effect and the osmotic pressure effect of the polymer act to cause a repulsion effect due to steric stabilization, or the pulverized coal is dispersed and stabilized by the compression repulsion 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。The additive also has some carboxyl groups and therefore exhibits some anionic properties, and is also stabilized by 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。Further, it is considered that the pulverized coal forms a weak aggregate network structure by the adsorbed polymer and can maintain stability for 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ハイプやバーナチッ
プの摩耗を軽減するものと考えられる。Further, regarding the lubricity, it is considered that when the polymer molecules existing in the water are compressed as the particles come close to each other, a repulsive force is generated, and the sliding between the particles is smoothed, thereby reducing the wear of the hype and the burner tip.
以下、本発明を実施例に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。Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to these Examples.
実施例1〜10および比較例1〜3 表−1に示す配合処方によって、各種のCWM用添加剤
を製造した。Examples 1 to 10 and Comparative Examples 1 to 3 Various additives for CWM were produced according to the formulation shown in Table 1.
500ml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メッシュパス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。投入後10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4000rpmで10分間混合し石炭−水スラリーを調製し
た。A predetermined amount (Table 2) of an additive and water were put into a 500 ml container and dissolved therein, and then, Warkworth coal (Australian bituminous coal) pulverized and prepared to 80% by weight in a 200 mesh pass was gradually charged with stirring. After mixing for 10 minutes after charging, the mixture was mixed at 4000 rpm for 10 minutes with a homomixer (“Auto Homomixer” manufactured by Tokushu Kika Co., Ltd.) 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, the representative viscosity, and the amount of sedimentation and coagulation of the obtained coal-water slurry, and Table 3 shows the abrasion loss of the disk.
各測定は以下の方法によった。 Each measurement was based on the following method.
(1)石炭濃度(重量%):乾燥減水量より求めた。(1) Coal concentration (% by weight): Determined from the amount of water loss on drying.
(2)代表粘度(mPa・s):ハーケ社製「レオメータ
ー」でレオグラムを測定し、ずり速度100sec-1の粘度を
求めた。(2) Representative viscosity (mPa · s): The rheogram was measured with a “Rheometer” manufactured by Haake, and the viscosity at a shear rate of 100 sec −1 was determined.
(3)沈降凝集量(重量%):石炭−水スラリー300gを
250ml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) Settling and coagulation amount (% by weight): 300 g of coal-water slurry
The pot was placed in a 250 ml pot and left as it was. After 2 weeks, the pot was turned upside down and the amount remaining at the pot bottom without self-flow was measured.
(4)ディスクの摩耗減量(mg):石炭−水スラリー50
0gを容器に入れ、50mmφ×2mmの銅板ディスクを浸漬し
て2000rpm×20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た。(4) Disc wear loss (mg): Coal-water slurry 50
0 g was placed in a container, and a copper plate disk of 50 mmφ × 2 mm was immersed and rotated at 2000 rpm × 20 hours to determine the weight loss due to wear of the disk.
比較例4〜7 表−1に示す添加剤を用いて、実施例1〜10および比
較例1〜3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 4 to 7 Coal-water slurries were prepared in the same manner as in Examples 1 to 10 and Comparative Examples 1 to 3 using the additives shown in Table 1, and the coal concentration, the representative viscosity, the amount of sedimentation and agglomeration were measured. Was measured for loss on wear. The results are shown in Tables 2 and 3.
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, excellent fluidity, excellent slurryability, low sedimentation and aggregation, and low stability. It can be seen that the disc is excellent in lubrication and that the wear loss of the disc is small.
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10〜20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、さら
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。The additive for CWM of the present invention mainly contributes to the water reducing effect. By using the additive, the concentration of pulverized coal in CWM can be increased by 10 to 20% by weight as compared with the conventional case. In addition, it improves the fluidity of CWM, suppresses sedimentation and agglomeration of pulverized coal, maintains stability for a long time, and further enhances the lubricity of CWM to reduce wear on transport pipes and burner chips. it can.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 FI C08F 222/08 C08F 222/08 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 Identification code FI C08F 222/08 C08F 222/08
Claims (3)
(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 (式中、l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(C2H4O)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以上のアルコール類。An additive for a 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) (In the formula, 1 represents an integer of 1 to 5, m represents an integer of 1 to 3, and n represents an integer of 4 to 10.) (B) Polyether derivative having a polyalkylene glycol chain represented by the general formula (2) X (R ) P (C 2 H 4 O) 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 represents an integer of 0 to 10 and q represents an integer of 10 to 200), (C) alcohols having 6 or more carbon atoms.
応モル比が(A):(B):(C)=1:(1〜10):
(1〜5)である請求項1記載の石炭−水スラリー用添
加剤。2. The reaction molar ratio of each of the components (A), (B) and (C) is (A) :( B) :( C) = 1: (1-10):
The additive for a coal-water slurry according to claim 1, which is (1 to 5).
ステル化物の数平均分子量が5000〜100000である請求項
1記載の石炭−水スラリー用添加剤。3. The coal-water slurry additive according to claim 1, wherein the partially esterified styrene-maleic acid copolymer has a number average molecular weight of 5000 to 100,000.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2223022A JP2747521B2 (en) | 1990-08-23 | 1990-08-23 | Additive for coal-water slurry |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2223022A JP2747521B2 (en) | 1990-08-23 | 1990-08-23 | Additive for coal-water slurry |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04103692A JPH04103692A (en) | 1992-04-06 |
JP2747521B2 true JP2747521B2 (en) | 1998-05-06 |
Family
ID=16791612
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2223022A Expired - Fee Related JP2747521B2 (en) | 1990-08-23 | 1990-08-23 | Additive for coal-water slurry |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2747521B2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH682237A5 (en) * | 1990-12-29 | 1993-08-13 | Sandoz Ag | Styrene]-maleic acid half-ester copolymer, used as cement additive |
DE102006062441A1 (en) | 2006-12-27 | 2008-07-03 | Byk-Chemie Gmbh | Comb polymer is useful as a wetting agent and dispersant comprises styrene units and derivatized maleic anhydride units with phosphate or quaternary ammonium functions |
DE102006062440A1 (en) | 2006-12-27 | 2008-07-03 | Byk-Chemie Gmbh | Polymer mixture useful as a wetting agent or dispersant, especially for pigments or fillers, comprises a comb polymer and a copolymer |
-
1990
- 1990-08-23 JP JP2223022A patent/JP2747521B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH04103692A (en) | 1992-04-06 |
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