JPS61151010A - Production of hydroxy apatite - Google Patents

Production of hydroxy apatite

Info

Publication number
JPS61151010A
JPS61151010A JP27207084A JP27207084A JPS61151010A JP S61151010 A JPS61151010 A JP S61151010A JP 27207084 A JP27207084 A JP 27207084A JP 27207084 A JP27207084 A JP 27207084A JP S61151010 A JPS61151010 A JP S61151010A
Authority
JP
Japan
Prior art keywords
reaction
hap
temperature
slurry
ratio
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
JP27207084A
Other languages
Japanese (ja)
Other versions
JPH0324405B2 (en
Inventor
Yasuji Nakaso
中曽 泰次
Hiromi Nakahara
中原 弘美
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.)
Central Glass Co Ltd
Original Assignee
Central Glass 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 Central Glass Co Ltd filed Critical Central Glass Co Ltd
Priority to JP27207084A priority Critical patent/JPS61151010A/en
Publication of JPS61151010A publication Critical patent/JPS61151010A/en
Publication of JPH0324405B2 publication Critical patent/JPH0324405B2/ja
Granted legal-status Critical Current

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  • Materials For Medical Uses (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

PURPOSE:To obtain hydroxy apatite having a desired Ca/P ratio in good reproducibility, by adding quicklime and/or slaked lime to slurry of CaHPO4.2H2 O and water, and aging a reaction product. CONSTITUTION:CaO and/or Ca(OH)2 is gradually added to and reacted with slurry of CaHPO4.2H2O and water while keeping pH<=10, temperature at 5-70 deg.C optionally in an inert gas atmosphere such as N2, etc. until it reaches 80wt% theoretical amount added and the rest of CaO and Ca(OH)2 is added to the reaction mixture, the reaction mixture is aged at >=60 deg.C aging temperature for >=0.5hr, a solid reaction product is separated by a means such as filtration, etc., and an excess amount of Ca(OH)2 is washed and removed, to give hydroxy apatite useful as a material for biological use, etc.

Description

【発明の詳細な説明】 〔産業上の利用分野」 本発明はヒドロキシアバタイ) (HAp)の製造法に
関する。
DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for producing hydroxyabatai (HAp).

近年、生体材料としてりん酸化合物、特にHApが注目
され人工骨、人工歯などに用いられている。これはHA
pが生体内に埋入された場合安全かつ化学的に安定であ
りしかもそれが生体内で拒否反応を起こすことなく自然
骨と結合治癒しやすいからである。
In recent years, phosphoric acid compounds, especially HAp, have attracted attention as biomaterials and are used in artificial bones, artificial teeth, and the like. This is HA
This is because when p is implanted in a living body, it is safe and chemically stable, and moreover, it easily heals by bonding with natural bone without causing a rejection reaction in the living body.

その他HApの用途としては高級な磁器の一種である骨
灰磁器いわゆるボーンチャイナの原料、あるいはクロマ
トグラフィー用充填剤等がある。
Other uses of HAp include as a raw material for bone china, a type of high-grade porcelain, and as a filler for chromatography.

[従来の技術〕 一般に、 HApの合成法としては、高温下の固相反応
に″よる乾式法と大気圧下での水溶液反応あるいは水熱
反応による湿式法が知られているが、高温下での固相反
応は1000℃以上の高温で長時間の焼成が必要であり
、装置も高価となるため工業的な方法とは言い難い。
[Prior Art] In general, as methods for synthesizing HAp, there are two known methods: a dry method using a solid phase reaction at high temperatures, and a wet method using an aqueous solution reaction or hydrothermal reaction at atmospheric pressure. The solid-phase reaction requires long-term calcination at a high temperature of 1000° C. or higher, and the equipment is expensive, so it cannot be called an industrial method.

また、湿式法のうち、水熱反応による方法として、Ca
HPO4・2H10(又は0ILHPO4)と0a(O
H)2の反応による方法が知られている(特開昭53−
111000号)。
In addition, among the wet methods, as a method using hydrothermal reaction, Ca
HPO4・2H10 (or 0ILHPO4) and 0a(O
H) A method based on the reaction of
111000).

この方法はそれぞれの原料を固体混合し、この混合物を
オートクレーブを用いて、100〜500℃、1〜50
0気圧の熱水条件下で水熱反応させることにより結晶性
HAp ′I&:製造するものである。
In this method, each raw material is mixed solidly, and this mixture is heated at 100 to 500°C and 1 to 50°C using an autoclave.
Crystalline HAp'I&: is produced by carrying out a hydrothermal reaction under hydrothermal conditions of 0 atmospheric pressure.

しかし、この方法は反応条件が過酷なため反応装置が高
価となり、工坏ルキーコストも高いという欠点を有して
いる。
However, this method has the disadvantage that the reaction conditions are harsh, the reaction equipment is expensive, and the engineering cost is also high.

一方、水溶液法によるHApの製造方法としては、リン
酸の中和による方法があるが、反応速度が大きく、得ら
れる沈殿物がコロイド状になシ、取扱いや操作の面で不
便である。またHApの主たる用途である生体材料とし
て用いる場合においては例えば鉄、亜鉛、鉛などがある
程度以上台まれているとこれらのイオンが生体内で溶出
するおそれがあることから、不純物の極めて少ないもの
が要求されるため、粗リン酸を原料とする場合には、不
純物除去が極めてやっかいなものである。
On the other hand, as a method for producing HAp using an aqueous solution method, there is a method using neutralization with phosphoric acid, but the reaction rate is high and the resulting precipitate is not colloidal, which is inconvenient in terms of handling and operation. In addition, when using HAp as a biological material, which is the main use of HAp, if iron, zinc, lead, etc. are present to a certain extent, these ions may be eluted in the living body, so it is necessary to use materials with extremely low impurities. Therefore, when crude phosphoric acid is used as a raw material, it is extremely difficult to remove impurities.

以上の方法とは全く異なつ九極めて工業的な方法として
、本発明者らは既にCaHPO4拳2H,Oと水のスラ
リーに0a(OH)* f添加し、大気圧下で反応をお
こなう水溶液法を提案している(特願昭58−1109
47号)。この方法FiCa(OH)2の添加fCa/
Pモル比1.6(理論添加量の90%)まではpH10
以下に保つように徐々におこなうことにより、容易に、
且つ短時間で高純度のHApを製造し得るものである。
As an extremely industrial method that is completely different from the above method, the present inventors have already developed an aqueous solution method in which 0a(OH)*f is added to a slurry of CaHPO4F2H,O and water and the reaction is carried out under atmospheric pressure. (Patent application 1109/1982)
No. 47). This method of addition of FiCa(OH)2 fCa/
pH 10 up to P molar ratio 1.6 (90% of theoretical addition amount)
By gradually maintaining the following, it is easy to
Moreover, highly pure HAp can be produced in a short time.

〔従来技術の問題点〕[Problems with conventional technology]

従来提案されたHApの製造法のうち、乾式法および水
熱反応による方法はいずれも装置が高価となシ、エネル
キー的にも不利なものであった。また、水溶液法のうち
リン酸の中和による方法は、生成物の取扱いに問題があ
ると同時に高純度のHApJl造には不適でめった。一
方本発明者らが既に提案した前記の方法においては、一
旦反応により生成したHApのCP/Pモルが、濾過洗
浄の操作中に変動することがあシ、再現性よく所望のC
a比のHApを得ることが必ずしも満足するものではな
かった。
Among the methods for producing HAp that have been proposed so far, both the dry method and the hydrothermal reaction method require expensive equipment and are disadvantageous in terms of energy. Further, among the aqueous solution methods, the method using phosphoric acid neutralization has problems in handling the product and is not suitable for producing high-purity HApJl. On the other hand, in the method already proposed by the present inventors, the CP/P mole of HAp once generated by the reaction may fluctuate during the filtration and washing operation, and the desired C
Obtaining HAp of a ratio was not always satisfactory.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

本発明は前記の従来技術の問題点を解決するためのもの
であシ、また特願昭58−110947号の方法におい
て再現性よく所望のCa/i)比のHApf:得ること
を目的とするものである。
The present invention is intended to solve the above-mentioned problems of the prior art, and also aims to obtain a desired Ca/i) ratio of HApf with good reproducibility using the method of Japanese Patent Application No. 110947/1982. It is something.

〔問題点を解決するための手段〕[Means for solving problems]

すなわち本発明はCaHPO4・−2H70と水とのス
ラリー溶液に温度5〜70℃でCaOおよび/または保
つように徐々に加え、次いで残量を加えた後60℃以上
で0.5時間以上熟成することを特徴とするHApの製
造法である。
That is, in the present invention, CaO and/or is gradually added to a slurry solution of CaHPO4.-2H70 and water at a temperature of 5 to 70°C so as to be maintained, and then the remaining amount is added and then aged at 60°C or higher for 0.5 hours or more. This is a method for producing HAp characterized by the following.

本発明を更に詳しく説明するとCa HPO4・2H!
0とCa源として0a(OH)2を用いた場合の基本反
応式は下記のように示される。
To explain the present invention in more detail, Ca HPO4・2H!
The basic reaction formula when Oa(OH)2 is used as the Ca source and Oa(OH)2 is shown below.

60aHPO4112H20+ 40 a(0H)z 
→Oa締(PO4)@ (OH)1 育8Hi Oこの
場合OaHPO4・2H20と水のスラリー溶液に温度
100℃以下で当量のCa(OH)1を一挙に投入して
も反応は極めて遅(、HApは生成し難い。しかしなが
らCaHPO4・2H!0スラリーに各反応速度を超え
ない範囲でCa (0H)1を連続的または断続的に供
給する場合、具体的には反応液のpH値が特定の値以上
にならないように調節しながらCa(O[()2溶液を
供給すれば、反応はpHの制御が大きな要素で、例えば
反応温度50℃においては0a(OH)1の理論添加量
の87%まではpH1o以下、好ましくはpH9,0以
1の領域で反応させ、その後87%以降はDH9以上で
反応をおこない理論Ca/P比1.67のHAPを合成
する。また、仕込みCa/P比が若干1.67を超えて
も後段の洗浄によl) C!a(OH)mを除去するこ
とができるので、容易にC!a/P比星、67のHAp
を得ることができる。
60aHPO4112H20+ 40a(0H)z
→OaHin (PO4) @ (OH)1 Iku8Hi OIn this case, even if an equivalent amount of Ca(OH)1 is added all at once to a slurry solution of OaHPO4.2H20 and water at a temperature of 100°C or less, the reaction is extremely slow (, HAp is difficult to generate.However, when Ca(0H)1 is continuously or intermittently supplied to the CaHPO4.2H!0 slurry within a range that does not exceed each reaction rate, it is difficult to generate HAp. If the Ca(O[()2 solution is supplied while adjusting the value so as not to exceed the value), pH control is a major factor in the reaction.For example, at a reaction temperature of 50°C, the theoretical addition amount of 0a(OH)1 is 87 %, the reaction is carried out at pH 1o or lower, preferably pH 9.0 or higher, and then from 87% onwards, the reaction is carried out at DH9 or higher to synthesize HAP with a theoretical Ca/P ratio of 1.67. Even if the ratio slightly exceeds 1.67, C!a(OH)m can be removed by subsequent washing, so C!a/P ratio, 67 HAp can be easily removed.
can be obtained.

本反応は、反応時のpHが極めて重要な因子であり、反
応を完結させるためにはpH制御に十分留意する必要が
あり、 pHをlO以下に保たない場合には未反応の0
aHPO4e 2H20が残存し、HApが得られない
ものである。
In this reaction, the pH during the reaction is an extremely important factor, and in order to complete the reaction, it is necessary to pay sufficient attention to pH control.If the pH is not kept below 1O, unreacted 0O
aHPO4e 2H20 remains and HAp cannot be obtained.

反応温度は通常5〜70℃であるが、反応を速く進行さ
せるためには50〜70℃が好ましい。5℃以下におい
ては反応の進行が遅くなり好ましくない。また70℃以
上ではC!aHPO4@ 2H20がC!aHPO4に
転移するため避けるべきである。
The reaction temperature is usually 5 to 70°C, preferably 50 to 70°C in order to speed up the reaction. If the temperature is below 5°C, the reaction progresses slowly, which is not preferable. Also, above 70℃, C! aHPO4@2H20 is C! It should be avoided because it metastasizes to aHPO4.

また、生成物HApのOa/P比は0a(OH)2供給
量(仕込みCa/P比)を変えることによpCa/p比
!、48〜1.67のHApを容易に得ることができる
In addition, the Oa/P ratio of the product HAp can be adjusted to the pCa/p ratio by changing the 0a(OH)2 supply amount (the charged Ca/P ratio). , HAp of 48-1.67 can be easily obtained.

このようにして生成したHApはこのままでは不安定で
あり、後段での洗浄によF)、0alP比が変動するた
め、本発明においては、反応終了後熟成をおこなうもの
である。熟成の条件としては、熟成温度を65℃以上、
よシ好ましくは90℃以上とするものであり、熟成時間
は温度にもよるが100℃で少くとも0.5時間以上、
65℃では少くとも一昼夜の熟成が必要である。従って
、効率的に熟成をおこなうためには、よシ高温で熟成を
おこなう方がよい。
The HAp produced in this way is unstable as it is, and the washing at a later stage changes the F) and 0alP ratio, so in the present invention, ripening is performed after the reaction is completed. The conditions for ripening are a ripening temperature of 65°C or higher,
Preferably, the temperature is 90°C or higher, and the aging time is 100°C for at least 0.5 hour or more, although it depends on the temperature.
Aging at 65°C for at least one day and night is required. Therefore, in order to ripen efficiently, it is better to ripen at a higher temperature.

かかる熟成をおこなったのち、濾過等の常用  実手段
で固形分を分離し、過剰量の0a(OH)1を洗浄除去
する。
After such aging, the solid content is separated by a conventional practical means such as filtration, and the excess amount of Oa(OH)1 is washed away.

このようにして、所望のCa/P比のHApを再現性よ
く得ることができ、  HApの理論Ca/P比である
1、67のHApを得るには特に優れた方法である。
In this way, HAp with a desired Ca/P ratio can be obtained with good reproducibility, and this is a particularly excellent method for obtaining HAp with a theoretical Ca/P ratio of 1.67.

本発明において使用する0a(OH)1は粉末、スラリ
ーどちらで供給しても構わない。またCa(OH)1の
かわりにCaOを用いても勿論構わない。さらに生成物
HApへのCO,イオンの混入をできるだけ低く押えた
い場合には、不活性ガス(例えばN、など)雰囲気下で
反応させることが望ましい。
Oa(OH)1 used in the present invention may be supplied in either powder or slurry form. Moreover, it is of course possible to use CaO instead of Ca(OH)1. Furthermore, if it is desired to suppress the incorporation of CO and ions into the product HAp as low as possible, it is desirable to carry out the reaction under an inert gas (for example, N, etc.) atmosphere.

本発明で得られるHApは微粒子板状粉末でありそのま
ま若しくはその他のセルロース、コラ−ケン等の有機物
と共に成型焼結して又は有機マトリックスとの複合体と
して生体材料として使用できるほか、クロマトグラフィ
ー充填剤としての用途にも十分使用できる。
HAp obtained in the present invention is a fine particle plate-like powder and can be used as a biological material as it is or by molding and sintering with other organic materials such as cellulose and kolaken, or as a composite with an organic matrix, and can also be used as a chromatography filler. It can also be used as a.

以下実施例により本発明の詳細な説明する。The present invention will be explained in detail below with reference to Examples.

施例1〜6、比較例1.2 温水ジャケットを施した5US304製の蓋つき601
反応装置に攪拌機、pH計、温度計、還流冷却器をセッ
トし、内部に0aHPO4・2H!0を水と共に仕込ん
だのち加温し;所定の温度となった時点で別に設けた攪
拌機つき石灰乳タンクから温水ンヤケットによシ予熱さ
れた10%石灰乳をポンプで反応装置に供給し、反応を
おこなった。反応終了後所定の温度で熟成し、固形分を
濾別し、水で過剰Ca(OH)2を洗浄除去し、乾燥し
た。
Examples 1 to 6, Comparative Example 1.2 601 with lid made of 5US304 with hot water jacket
A stirrer, pH meter, thermometer, and reflux condenser are set in the reaction apparatus, and 0aHPO4.2H! 0 with water and then warmed; when the predetermined temperature was reached, 10% lime milk preheated by a hot water jacket was supplied from a separately provided lime milk tank with a stirrer to the reactor using a pump, and the reaction was carried out. was carried out. After the reaction was completed, the mixture was aged at a predetermined temperature, the solid content was filtered off, excess Ca(OH)2 was washed away with water, and the mixture was dried.

反応条件、熟成条件および結果を第1表に示  比jす
。また実施例1の各反応時間でのpH,ca(on)!
の添加率の関係を第1図に、得られた生成物の   1
X線回折パターンを第2図に示す。
The reaction conditions, aging conditions and results are shown in Table 1. Also, the pH, ca(on) at each reaction time in Example 1!
Figure 1 shows the relationship between the addition rate of 1 of the obtained product.
The X-ray diffraction pattern is shown in FIG.

第    l    表 *1反応時のpH条件 aa(OH)、添加率  85%まではpH9,5以下
の領域85〜100%まではpH8〜12の領域*2X
2X線装置で分析 狡例3 aaHPO,−2H,02,Okg+、  H,o 3
0,0)cpを反応装置C仕込み温度50℃で、0a(
OH)意IO%スラリー5oqkgt−−挙に供給し、
仕込みC!a/P比f、1.69にした。反応液pHは
11.3となり、反応時間30時間C生成物を取り出し
、濾過、乾燥した。これをに線回折装置で分析した結果
、HApはごく僅かしか認められなかった。このX線回
折パターン辷第5図に示す。
Table l *1 pH conditions during reaction aa (OH), addition rate Up to 85%, pH 9, 5 or less region 85-100%, pH 8-12 region *2X
2 Analysis using an X-ray device Cunning example 3 aaHPO, -2H,02,Okg+, H,o 3
0,0)cp at a charging temperature of 50°C in reactor C, 0a(
OH) Supply IO% slurry 5 oz kgt-- every time,
Preparation C! The a/P ratio f was set to 1.69. The pH of the reaction solution became 11.3, and the reaction time was 30 hours.The C product was taken out, filtered, and dried. As a result of analyzing this using a linear diffraction device, only a very small amount of HAp was observed. This X-ray diffraction pattern is shown in FIG.

口発明の効果J 本発明によれば、生体材料等として有用なヒドロキシア
パタイトt−容易に得ることができ、〕かも再現性よく
所望のCa/P比とすることができるものである。
Effects of the Invention According to the present invention, hydroxyapatite, which is useful as a biomaterial, can be easily obtained, and a desired Ca/P ratio can be obtained with good reproducibility.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は実施例1における各反応時間でのnHlOa(
OH)、添加率の関係を示すクラブである。 第2図および第3図はそれぞれ実施例1及び七較例3の
X線回折パターンである。
Figure 1 shows nHlOa (
OH) is a club that shows the relationship between addition rates. FIG. 2 and FIG. 3 are the X-ray diffraction patterns of Example 1 and Comparative Example 3, respectively.

Claims (1)

【特許請求の範囲】[Claims] CaHPO_4・2H_2Oと水とのスラリーにCaO
及び/またはCa(OH)_2を添加し、ヒドロキシア
パタイトを製造する方法において、温度5〜70℃でC
aO及び/またはCa(OH)_2の理論添加量の80
%まではpHを10以下に保ちながらCaO及び/また
はCa(OH)_2を徐徐に加え、次いで残量を加えた
後65℃以上で0.5時間以上熟成することを特徴とす
るヒドロキシアパタイトの製造法。
CaO in the slurry of CaHPO_4・2H_2O and water
In a method for producing hydroxyapatite by adding and/or Ca(OH)_2, C at a temperature of 5 to 70°C.
80 of the theoretical addition amount of aO and/or Ca(OH)_2
% of hydroxyapatite, which is characterized by slowly adding CaO and/or Ca(OH)_2 while keeping the pH below 10, then adding the remaining amount, and then aging at 65°C or higher for 0.5 hours or more. Manufacturing method.
JP27207084A 1984-12-25 1984-12-25 Production of hydroxy apatite Granted JPS61151010A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27207084A JPS61151010A (en) 1984-12-25 1984-12-25 Production of hydroxy apatite

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27207084A JPS61151010A (en) 1984-12-25 1984-12-25 Production of hydroxy apatite

Publications (2)

Publication Number Publication Date
JPS61151010A true JPS61151010A (en) 1986-07-09
JPH0324405B2 JPH0324405B2 (en) 1991-04-03

Family

ID=17508674

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27207084A Granted JPS61151010A (en) 1984-12-25 1984-12-25 Production of hydroxy apatite

Country Status (1)

Country Link
JP (1) JPS61151010A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0426509A (en) * 1990-05-21 1992-01-29 Mitsubishi Materials Corp Hydroxyapatite fine crystal and its production
JP2004141359A (en) * 2002-10-23 2004-05-20 National Institute Of Advanced Industrial & Technology Apatite hydrogel complexed with protein, its solidified body, and its production method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0426509A (en) * 1990-05-21 1992-01-29 Mitsubishi Materials Corp Hydroxyapatite fine crystal and its production
JP2004141359A (en) * 2002-10-23 2004-05-20 National Institute Of Advanced Industrial & Technology Apatite hydrogel complexed with protein, its solidified body, and its production method

Also Published As

Publication number Publication date
JPH0324405B2 (en) 1991-04-03

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