JPH0751681A - Treatment of silica-containing solution - Google Patents

Treatment of silica-containing solution

Info

Publication number
JPH0751681A
JPH0751681A JP20057993A JP20057993A JPH0751681A JP H0751681 A JPH0751681 A JP H0751681A JP 20057993 A JP20057993 A JP 20057993A JP 20057993 A JP20057993 A JP 20057993A JP H0751681 A JPH0751681 A JP H0751681A
Authority
JP
Japan
Prior art keywords
silica
containing solution
treating
ppm
hot water
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
Application number
JP20057993A
Other languages
Japanese (ja)
Inventor
Seiya Morita
誠也 森田
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.)
Nittetsu Mining Co Ltd
Original Assignee
Nittetsu Mining 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 Nittetsu Mining Co Ltd filed Critical Nittetsu Mining Co Ltd
Priority to JP20057993A priority Critical patent/JPH0751681A/en
Publication of JPH0751681A publication Critical patent/JPH0751681A/en
Pending legal-status Critical Current

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  • Removal Of Specific Substances (AREA)
  • Silicon Compounds (AREA)

Abstract

PURPOSE:To rapidly treat a silica-contg. soln. such as geothermal hot water with a simple apparatus at a low cost while preventing the precipitation of silica scale and to recover high purity silica. CONSTITUTION:An org. capturing agent and a polymer flocculant are added to a silica-contg. soln. to flocculate and precipitate the silica and this precipitated silica is recovered or removed.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、シリカ含有溶液の処理
方法に関するものであり、特に地熱熱水や温泉水のよう
なシリカを含有する溶液からシリカを除去または回収す
る方法に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating a silica-containing solution, and more particularly to a method for removing or recovering silica from a silica-containing solution such as geothermal hot water or hot spring water.

【0002】[0002]

【従来の技術】従来から地熱発電の開発が行なわれてい
るが、地熱発電所においては発電に用いられる蒸気の他
に多量の熱水が噴出する場合が多い。地下深部の地熱貯
溜層は高温、高圧であるため、地熱熱水中にはシリカが
400〜1200ppm程度溶解しているのが一般的である。
そして、地上に噴出すると圧力が低下するため、シリカ
が過飽和の状態となりシリカスケールが析出してくる。
このスケールは、熱水を移送するパイプラインや熱水を
再び地下深部に戻すための還元井に目詰まりをおこすた
め、地熱発電を行う上で大きな障害となるので、効果的
で迅速なスケール防止法が求められている。また、シリ
カを回収する場合は、多量に発生するシリカスラッジの
処理が問題となる。そこで、このシリカスラッジをシリ
カ資源としてとらえ、比表面積、細孔容積が大きいとい
う特徴を有するので、その利用を図ることも大切であ
る。
2. Description of the Related Art Geothermal power generation has been conventionally developed, but in geothermal power plants, a large amount of hot water is often ejected in addition to steam used for power generation. Since the geothermal reservoir in the deep underground has high temperature and high pressure, silica is not present in the geothermal water.
It is generally dissolved in about 400 to 1200 ppm.
When jetted to the ground, the pressure drops, and the silica becomes supersaturated, and silica scale begins to precipitate.
This scale is a major obstacle for geothermal power generation because it clogs the pipeline for transferring hot water and the return well for returning hot water to the deep underground, so effective and quick scale prevention is possible. Law is required. Further, in the case of recovering silica, the treatment of a large amount of silica sludge becomes a problem. Therefore, since this silica sludge is regarded as a silica resource and has a large specific surface area and a large pore volume, it is important to utilize it.

【0003】従来から提案ないし実施されている地熱熱
水等のシリカ含有溶液の処理方法としては、(1)自然沈
積法、(2)カルシウム、マグネシウム等の2次成分を添加
して、反応生成物を回収する、2次成分添加法(特開昭
59-16588号公報、特開昭59-13919号公報)、(3)凝集沈
澱法(特開昭59-86864号公報、特開昭62-158111号公
報)、(4)シリカを浮遊させて選別分離する浮上分離法
(「地熱水中阻害成分の抽出・利用技術可能性調査」新
エネルギー総合開発機構、昭和60年)、(5)限外濾過膜
法(特開昭63-1495号公報、特開昭63-2805号公報)等の
種々の方法がある。
Conventionally proposed or practiced methods for treating silica-containing solutions such as geothermal hot water are (1) spontaneous deposition method, (2) addition of secondary components such as calcium and magnesium, and reaction formation Secondary component addition method for recovering substances
59-16588, JP-A-59-13919), (3) Aggregation and precipitation method (JP-A-59-86864, JP-A-62-158111), (4) by suspending silica Floating separation method for selective separation ("Examination and utilization technology feasibility study of geothermal water inhibiting components", New Energy Development Organization, 1985), (5) Ultrafiltration membrane method (Japanese Patent Laid-Open No. 63-1495, There are various methods such as JP-A-63-2805).

【0004】[0004]

【発明が解決しようとする課題】しかしながら、上記の
各方法にはそれぞれの問題がある。即ち、(1)の自然沈
積法は簡便な方法であり、回収されるシリカも純度が高
いと推定されるが、析出時間が長いので大規模な滞留槽
が必要であり、処理後の熱水中には相当量のシリカが残
り、スケール析出の問題が完全には解決されない等の問
題がある。そして、(2)の2次成分添加法は、いずれも
化合物として回収されるため、シリカとしての利用がで
きず、用途が狭いという欠点がある。生産物の用途が確
立されている場合には低コストで生産が可能であるが、
確立されていない場合はスラッジの処理が最大の難点に
なる。
However, each of the above methods has its own problems. That is, the natural deposition method of (1) is a simple method, and it is estimated that the silica to be recovered is also high in purity, but since a precipitation time is long, a large-scale retention tank is required, and hot water after treatment is required. There is a problem that a considerable amount of silica remains inside and the problem of scale precipitation cannot be completely solved. The second component addition method (2) has a drawback that it cannot be used as silica because it is recovered as a compound, and its use is narrow. If the use of the product is established, it can be produced at low cost,
If not established, sludge treatment is the biggest drawback.

【0005】さらに、(3)の凝集沈澱法は、無機系の捕
収剤を添加する場合は、スラッジの処理が問題となり、
有望な用途が確立されなければ実用化が難しい。また、
特開昭59-86864号公報のアルミニウム化合物などの無機
系捕収剤と有機系高分子凝集剤を組み合せて使用し、水
酸化物のスラッジとして沈澱して、回収後に酸で水酸化
物を溶解し、シリカとして回収する方法では、酸のコス
トが高いこと、一度の酸処理では不純分がのこり、数回
この工程を繰り返さなければ純度が上昇しないことが難
点である。また、特開昭62-158111号公報のポリエチレ
ンイミンは、本発明に比べてフロック沈降速度が遅いこ
と、フロックの凝集程度が弱く、効率のよいシリカの回
収が難しいことに加え、本発明の薬剤の5倍程度の薬品
コストがかかる。
Furthermore, in the coagulating sedimentation method (3), when an inorganic scavenger is added, sludge treatment becomes a problem,
Practical application is difficult unless promising applications are established. Also,
Inorganic scavenger such as aluminum compound disclosed in JP-A-59-86864 is used in combination with organic polymer flocculant to precipitate as hydroxide sludge, and hydroxide is dissolved with acid after recovery. However, the method of recovering silica has the drawbacks that the cost of the acid is high, impurities are left over by a single acid treatment, and the purity does not increase unless this step is repeated several times. Further, the polyethyleneimine disclosed in JP-A-62-158111 has a slow floc sedimentation rate, weak floc aggregation degree, and efficient silica recovery is difficult in addition to the agent of the present invention. The chemical cost is about 5 times.

【0006】そして、(4)の浮上分離法は、回収される
シリカの純度は高いが、浮遊選別工程で多量の泡が発生
し、その処理のために多量の薬品が必要なこと、また多
量の熱水を処理するためには多数の装置が必要なため、
広大な敷地が必要となり、かつコストが嵩むなどの難点
がある。また、(5)の限外濾過膜法は、多量の地熱熱水
を処理する場合には数多くの限外濾過膜が必要になり、
コストが高くなる。さらに、処理するのに時間がかか
り、濾過膜にスケールが付着するなどの難点がある。
In the flotation method of (4), although the purity of the recovered silica is high, a large amount of bubbles are generated in the flotation and sorting process, a large amount of chemicals is required for the treatment, and a large amount of it is required. Since a large number of devices are required to process the hot water of
There are drawbacks such as the need for a vast site and increased costs. Further, the ultrafiltration membrane method of (5) requires a large number of ultrafiltration membranes when processing a large amount of geothermal hot water,
High cost. Furthermore, it takes time to process, and there is a problem that scales adhere to the filtration membrane.

【0007】叙上のように、地熱熱水のようなシリカ含
有溶液からシリカを除去したり、回収したりする従来の
技術では、大規模な装置や資材を要すること、処理工程
においてシリカスケールが析出して目詰まりを起こすこ
と、純度の高いシリカを回収すること、工程が複雑でコ
ストが嵩むこと等において種々の課題を有するのであ
る。本発明は上記の課題に鑑みてなされたものであり、
その目的は、地熱熱水等のシリカ含有溶液を簡単な装置
を用いて迅速かつ低コストで処理することができ、シリ
カスケールの析出を防止して、かつ純度の高いシリカを
回収することができる処理方法を提供することである。
As described above, the conventional techniques for removing and recovering silica from a silica-containing solution such as geothermal hot water require large-scale equipment and materials, and silica scale is generated in the treatment process. There are various problems such as precipitation and clogging, recovery of high-purity silica, complicated process and high cost. The present invention has been made in view of the above problems,
Its purpose is to be able to process silica-containing solutions such as geothermal hot water quickly and at low cost using a simple device, prevent precipitation of silica scale, and recover highly pure silica. It is to provide a processing method.

【0008】[0008]

【課題を解決するための手段および作用】上記の課題を
達成する本発明の要旨は、シリカ含有溶液に有機系の捕
収剤と高分子凝集剤を添加してシリカを凝集沈澱せし
め、沈澱したシリカを回収または除去することからなる
シリカ含有溶液の処理方法である。
Means and Actions for Solving the Problems The gist of the present invention for achieving the above-mentioned objects is to add an organic scavenger and a polymer flocculant to a silica-containing solution to cause the silica to flocculate and precipitate. A method for treating a silica-containing solution, which comprises recovering or removing silica.

【0009】本発明は、上記の目的を達成する手段とし
て、特定の有機系の捕収剤と高分子凝集剤を組み合わせ
て、シリカ含有溶液に一定量の範囲で添加することを特
徴とするるものである。本発明に用いる有機系の捕収剤
としては、広く市販されている長鎖アルキルアミン系の
界面活性剤を酢酸処理したものであり、その中でアルキ
ル組成としてC14:C16:C18=4:30:66を有
するものが最も好ましい。そして、その添加量として
は、20〜150ppmが適当であり、この範囲を超え
た量を添加すると、溶液の上澄液に白濁が残り、かつシ
リカの捕収能力が低下するからである。
As a means for achieving the above object, the present invention is characterized in that a specific organic scavenger and a polymer flocculant are combined and added to a silica-containing solution in a fixed amount range. It is a thing. The organic scavenger used in the present invention is a long-chain alkylamine-based surfactant, which is widely commercially available, treated with acetic acid, in which the alkyl composition is C14: C16: C18 = 4: 30. Most preferred are those with: 66. And, as the addition amount thereof, 20 to 150 ppm is suitable, and if an amount exceeding this range is added, white turbidity remains in the supernatant of the solution and the silica collecting ability is lowered.

【0010】次に、本発明に用いる高分子凝集剤として
は、ポリアクリルアミドの一部または全部をアクリル酸
ナトリウムで置換したアニオン系の高分子凝集剤を使用
することが望ましい。そして、その添加量は0.5〜5
ppmが好ましい。これ以下の添加量では、シリカのフ
ロックの凝集性が弱くなるので沈降速度が遅くなるから
であり、これ以上の添加量では、シリカのフロックは形
成されるが沈降せずに浮上するフロックが多くなるから
である。
Next, as the polymer coagulant used in the present invention, it is desirable to use an anionic polymer coagulant in which a part or all of polyacrylamide is replaced with sodium acrylate. And the addition amount is 0.5-5
ppm is preferred. This is because if the amount added is less than this, the flocculation property of silica becomes weak and the sedimentation rate becomes slower.If the amount added is more than this, silica flocs are formed but many flocs that do not settle and float. Because it will be.

【0011】上記のような特定の捕収剤と高分子凝集剤
を組み合わせて、一定量の範囲でシリカ含有溶液に添加
して処理すれば、シリカフロックが迅速に形成されるの
で、これを沈降分離したり、回収することも効率よく行
うことができるのである。分離回収されたシリカスラッ
ジは、これを水洗して乾燥した後に、600℃以上の温
度で30分程度加熱することにより、付着していた有機
系の捕収剤と高分子凝集剤を熱分解して除去することが
でき、純度97〜98%の高純度のシリカが得られる。
If a specific flocculant and a polymer flocculant as described above are combined and added to a silica-containing solution in a certain amount and treated, a silica floc is rapidly formed, so that it is precipitated. Separation and recovery can be performed efficiently. The separated and recovered silica sludge is washed with water, dried, and then heated at a temperature of 600 ° C. or higher for about 30 minutes to thermally decompose the attached organic collector and polymer coagulant. Can be removed by high-purity silica having a purity of 97 to 98%.

【0012】次に、本発明により処理した結果を一例と
して示す。629ppmのシリカを含有する温度48℃
の地熱熱水に、上記の条件を具備する有機系捕収剤の一
つである牛脂プロピレンを、量を変化させて添加し、さ
らに上記の条件を具備する高分子凝集剤を1ppm添加
して処理した結果、表1に示すように有機系捕収剤を4
0ppm添加した場合は、98%という高い除去能力を
発揮することが判る。また表2に示すように、従来から
高いシリカ捕収能力を示すといわれているポリエチレン
イミンと比較しても、少ない薬剤添加量で済むことが判
る。またこの両者の間では、等量の薬剤コストの比較
で、本発明が5分の1程度の低コストである。
Next, the result of processing according to the present invention will be shown as an example. 48 ° C. containing 629 ppm silica
Beef tallow propylene, which is one of the organic scavengers satisfying the above conditions, was added to the geothermal hot water in 1) in varying amounts, and 1 ppm of the polymer flocculant satisfying the above conditions was further added. As a result of the treatment, as shown in Table 1, 4
It can be seen that when 0 ppm is added, a high removal capacity of 98% is exhibited. Further, as shown in Table 2, it can be seen that a small amount of the added drug is sufficient as compared with polyethyleneimine which has been conventionally said to exhibit a high silica-collecting ability. Further, in the both cases, the cost of the present invention is about ⅕ as low as the comparison of the equivalent drug costs.

【0013】[0013]

【実施例】【Example】

実施例1 半径30cm、容積40,000cm3のアクリル樹脂製の沈
澱槽に、シリカ濃度629ppm、温度48℃の地熱熱
水を入れ、上記の条件を具備した有機系捕収剤の1種で
ある牛脂プロピレンを10〜200ppmまで量を変え
て添加し、さらに上記の条件を具備した高分子凝集剤を
1ppm添加して処理した結果、表1に示すように有機
系捕収剤の添加量が40ppmの場合に98%、50p
pmの場合に100%のシリカを除去することができ
た。同じ条件によりポリエチレンイミンを使用して処理
した場合は、40ppm添加で64%、50ppm添加
で94%のシリカ除去能力を示した。
Example 1 Beef tallow, which is one of the organic scavengers satisfying the above conditions, was prepared by placing geothermal hot water having a silica concentration of 629 ppm and a temperature of 48 ° C. in a precipitation tank made of acrylic resin having a radius of 30 cm and a volume of 40,000 cm 3. Propylene was added in an amount varying from 10 to 200 ppm, and 1 ppm of a polymer flocculant satisfying the above conditions was added and treated. As a result, as shown in Table 1, the amount of the organic scavenger added was 40 ppm. In case of 98%, 50p
It was possible to remove 100% of the silica at pm. When treated with polyethyleneimine under the same conditions, it showed a silica removal ability of 64% at 40 ppm addition and 94% at 50 ppm addition.

【0014】実施例2 半径30cm、容積40,000cm3のアクリル樹脂製の沈
澱槽に、シリカ濃度629ppm、温度48℃の地熱熱
水を入れ、上記の条件を具備した有機系捕収剤の1種で
ある牛脂プロピレンを50ppm添加し、さらに上記の
条件を具備した高分子凝集剤を量を変化させて添加して
処理した結果、添加量が0.5〜5ppmの範囲では概
ね30秒程度で沈降が完了したが、この添加量以下では
シリカのフロックの凝集性が弱く、沈降速度が遅くなる
ので沈降が完了するまでに1分以上を必要とした。また
これ以上の添加量では、シリカのフロックは形成される
が、沈降せずに浮上するフロックが多くなった。
EXAMPLE 2 Geothermal hot water having a silica concentration of 629 ppm and a temperature of 48 ° C. was placed in a precipitation tank made of an acrylic resin having a radius of 30 cm and a volume of 40,000 cm 3 , and one of the organic scavengers satisfying the above-mentioned conditions. As a result of adding 50 ppm of beef tallow propylene, and further adding a polymer flocculant having the above-mentioned conditions in various amounts, and precipitating it in about 30 seconds in the addition amount range of 0.5 to 5 ppm. However, if the amount of addition is less than this amount, the flocculation property of silica is weak and the sedimentation speed becomes slow. Therefore, it took 1 minute or more to complete sedimentation. When the amount added was more than this, silica flocs were formed, but many flocs floated without settling.

【0015】実施例3 半径30cm、容積40,000cm3のアクリル樹脂製の沈
澱槽に、シリカ濃度629ppm、温度48℃の地熱熱
水を入れ、上記の条件を具備した有機系捕収剤の1種で
ある牛脂プロピレンを50ppm添加し、さらに上記の
条件を具備した高分子凝集剤を2.5ppm添加して処
理した結果、35秒で沈降が完了した。そして、沈降し
たシリカフロックを回収して乾燥し、さらに600℃で
30分間加熱した結果、純度98%のシリカが得られ
た。
Example 3 Geothermal hot water having a silica concentration of 629 ppm and a temperature of 48 ° C. was placed in a precipitation tank made of an acrylic resin having a radius of 30 cm and a volume of 40,000 cm 3 , and one of the organic scavengers satisfying the above conditions. As a result of adding 50 ppm of beef tallow propylene and 2.5 ppm of a polymer flocculant satisfying the above conditions, the sedimentation was completed in 35 seconds. Then, the precipitated silica flocs were collected, dried, and further heated at 600 ° C. for 30 minutes, and as a result, silica having a purity of 98% was obtained.

【0016】[0016]

【表1】有機系捕収剤の添加量の変化による捕収力の比
[Table 1] Comparison of collection power with changes in the amount of organic collection agent added

【0017】[0017]

【表2】牛脂プロピレンとポリエチレンイミンの捕収力
の比較
[Table 2] Comparison of collecting power between beef tallow propylene and polyethyleneimine

【0018】[0018]

【発明の効果】本発明は、地熱熱水等のシリカ含有溶液
に特定の有機系の捕収剤と高分子凝集剤を組み合せて、
微量ずつ添加してシリカを凝集沈澱せしめて除去する
か、またはこの沈澱したシリカを回収することからなる
シリカ含有溶液の処理方法であるが、本発明によれば、
比較的簡単な装置並びに工程により、地熱熱水等のシリ
カ含有溶液中のシリカを迅速かつ低コストで除去または
回収することができる。そして除去、回収の効率が高
く、リカスケールの付着を防止することができるので、
地熱発電所等における配管やプラントへのシリカスケー
ルの析出による障害を大きく改善し、プラントの寿命を
延ばすことができる。また、回収されるシリカは、98
%程度の高純度のシリカが得られるので、シリカ資源と
して有効利用が期待される。
INDUSTRIAL APPLICABILITY The present invention combines a silica-containing solution such as geothermal hot water with a specific organic scavenger and a polymer flocculant,
A method for treating a silica-containing solution, which comprises adding minute amounts of silica to remove it by coagulating and precipitating, or recovering the precipitated silica.
Silica in a silica-containing solution such as geothermal hot water can be removed or recovered rapidly and at low cost by a relatively simple device and process. And since the efficiency of removal and recovery is high and it is possible to prevent the adhesion of lyca scale,
It is possible to greatly improve the obstacles due to the deposition of silica scale on the pipes and plants in geothermal power plants, etc., and extend the life of the plant. In addition, the recovered silica is 98
%, High-purity silica can be obtained, so that it is expected to be effectively used as a silica resource.

Claims (6)

【特許請求の範囲】[Claims] 【請求項1】 シリカ含有溶液に有機系の捕収剤と高分
子凝集剤を添加してシリカを凝集沈澱せしめ、沈澱した
シリカを回収することを特徴とするシリカ含有溶液の処
理方法。
1. A method for treating a silica-containing solution, which comprises adding an organic scavenger and a polymer coagulant to the silica-containing solution to coagulate and precipitate the silica, and recover the precipitated silica.
【請求項2】 シリカ含有溶液に有機系の捕収剤と高分
子凝集剤を添加してシリカを凝集沈澱せしめ、シリカを
除去することを特徴とするシリカ含有溶液の処理方法。
2. A method for treating a silica-containing solution, which comprises adding an organic scavenger and a polymer flocculant to the silica-containing solution to cause the silica to flocculate and precipitate, and to remove the silica.
【請求項3】 有機系の捕収剤が長鎖アルキルアミン系
の界面活性剤を酢酸処理したものでり、高分子凝集剤が
ポリアクリルアミドの一部または全部をアクリル酸ナト
リウムで置換したアニオン系の高分子凝集剤である請求
項1、2に記載のシリカ含有溶液の処理方法。
3. The organic scavenger is a long-chain alkylamine-based surfactant treated with acetic acid, and the polymer flocculant is an anionic scavenger in which a part or all of polyacrylamide is replaced with sodium acrylate. The method for treating a silica-containing solution according to claim 1, which is the polymer coagulant according to claim 1.
【請求項4】 長鎖アルキルアミン系の界面活性剤を酢
酸処理した有機系の捕収剤を20〜150ppm、ポリ
アクリルアミドの一部または全部をアクリル酸ナトリウ
ムで置換したアニオン系の高分子凝集剤を0.5〜5p
pmの割合で添加することを特徴とする請求項1、2に
記載のシリカ含有溶液の処理方法。
4. An anionic polymer flocculant in which 20 to 150 ppm of an organic scavenger obtained by treating a long-chain alkylamine-based surfactant with acetic acid and a part or all of polyacrylamide are replaced with sodium acrylate. 0.5-5p
The method for treating a silica-containing solution according to claim 1 or 2, characterized in that it is added in a proportion of pm.
【請求項5】 長鎖アルキルアミン系の界面活性剤を酢
酸処理したものが、アルキル組成としてC14:C1
6:C18=4:30:66である請求項3、4に記載
のシリカ含有溶液の処理方法。
5. A long-chain alkylamine-based surfactant treated with acetic acid has an alkyl composition of C14: C1.
The method for treating a silica-containing solution according to claim 3, wherein 6: C18 = 4: 30: 66.
【請求項6】 シリカ含有溶液が、シリカを含有する地
熱熱水である請求項1、2、3、4、5に記載のシリカ
含有溶液の処理方法。
6. The method for treating a silica-containing solution according to claim 1, 2, 3, 4, or 5, wherein the silica-containing solution is geothermal hot water containing silica.
JP20057993A 1993-08-12 1993-08-12 Treatment of silica-containing solution Pending JPH0751681A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20057993A JPH0751681A (en) 1993-08-12 1993-08-12 Treatment of silica-containing solution

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20057993A JPH0751681A (en) 1993-08-12 1993-08-12 Treatment of silica-containing solution

Publications (1)

Publication Number Publication Date
JPH0751681A true JPH0751681A (en) 1995-02-28

Family

ID=16426689

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20057993A Pending JPH0751681A (en) 1993-08-12 1993-08-12 Treatment of silica-containing solution

Country Status (1)

Country Link
JP (1) JPH0751681A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11239702A (en) * 1998-02-25 1999-09-07 Mitsubishi Materials Corp Method and device for recovering suspended solid from geothermal hot water and geothermal power generation installation using the same
JPH11244867A (en) * 1998-02-27 1999-09-14 Mitsubishi Materials Corp Treatment of silica-containing geothermal hot water
JP2002167213A (en) * 2000-11-28 2002-06-11 Mitsubishi Heavy Ind Ltd Silica recovering method and silica recovering apparatus
JP2006062952A (en) * 2004-07-27 2006-03-09 Mizusawa Ind Chem Ltd Aqueous slurry of silica having excellent storage stability

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11239702A (en) * 1998-02-25 1999-09-07 Mitsubishi Materials Corp Method and device for recovering suspended solid from geothermal hot water and geothermal power generation installation using the same
JPH11244867A (en) * 1998-02-27 1999-09-14 Mitsubishi Materials Corp Treatment of silica-containing geothermal hot water
JP2002167213A (en) * 2000-11-28 2002-06-11 Mitsubishi Heavy Ind Ltd Silica recovering method and silica recovering apparatus
JP4625177B2 (en) * 2000-11-28 2011-02-02 三菱重工業株式会社 Silica recovery method and silica recovery device
JP2006062952A (en) * 2004-07-27 2006-03-09 Mizusawa Ind Chem Ltd Aqueous slurry of silica having excellent storage stability

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