JPH0628726B2 - Type A zeolite adsorbent - Google Patents
Type A zeolite adsorbentInfo
- Publication number
- JPH0628726B2 JPH0628726B2 JP16402985A JP16402985A JPH0628726B2 JP H0628726 B2 JPH0628726 B2 JP H0628726B2 JP 16402985 A JP16402985 A JP 16402985A JP 16402985 A JP16402985 A JP 16402985A JP H0628726 B2 JPH0628726 B2 JP H0628726B2
- Authority
- JP
- Japan
- Prior art keywords
- zeolite
- type zeolite
- type
- adsorbent
- adsorption
- 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.)
- Expired - Lifetime
Links
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はカリウム担持Ａ型ゼオライトを有効成分とする
Ａ型ゼオライト吸着剤に関し、更に言えば水分の吸着性
にすぐれ、かつ再生利用に当り、再生劣化に抵抗性のあ
る熱安定性のある吸着剤に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an A-type zeolite adsorbent containing potassium-supporting A-type zeolite as an active ingredient. The present invention relates to a heat-stable adsorbent that is resistant to regeneration deterioration.
従来、ゼオライトはその吸着能を利用して水分やガスの
選択的な吸着剤として用いられていることは周知であ
る。It is well known that zeolite has hitherto been used as a selective adsorbent for moisture or gas by utilizing its adsorption ability.
特に、水分の除去を目的とする乾燥剤としては、Ａ型ゼ
オライトが工業的に用いられているが、この場合水分の
吸着−脱着の熱サイクルに耐えうるものでなければなら
ない。In particular, type A zeolite is industrially used as a desiccant for the purpose of removing water, but in this case, it must be able to withstand the heat cycle of water adsorption-desorption.
このような代表的なゼオライトとしては、例えば、イオ
ン交換比率が特定組成のＡ型ゼオライト（特公昭４８−
３９５６号公報、特公昭５２−１８１６０号公報）ある
いは、Ａ型ゼオライトにアルカリ土類金属化合物を存在
せしめて成型するゼオライトなどが知られている。As such a typical zeolite, for example, type A zeolite having a specific composition of ion exchange ratio (Japanese Patent Publication No. 48-
No. 3956, Japanese Examined Patent Publication No. 52-18160), or zeolites formed by molding an A-type zeolite with an alkaline earth metal compound present.
一般にＡ型ゼオライトは、 M2/nO・Al2O3・2.0±0.5SiO2・yH2O （式中Ｍはイオン交換可能陽イオンで一般的にはアルカ
リ金属、アルカリ土類金属などの一価又は二価陽イオ
ン、ｙは６以下の数値、ｎは１又は２の数値を示す。）
で表わされ、ＭがNaである場合有効細孔径が約４Ａ、Ｃ
ａの場合は約５Ａ、Ｋでは約３Ａであり、この細孔の大
きさと、吸着特性の相違を利用して、種々の物質の吸着
分離に利用されており、これらの中で、特にＫ−Ａ型ゼ
オライト（ＭがＫであるもの）は、有効細孔径が約３Ａ
と小さく、水分子以外はほとんど吸着しない為、有機溶
媒の脱水、気体の乾燥用として多用されている。Generally, A-type zeolite is M 2 / nO ・ Al 2 O 3・ 2.0 ± 0.5 SiO 2・ yH 2 O (where M is an ion-exchangeable cation and is generally one of alkali metals and alkaline earth metals). Valent or divalent cation, y represents a numerical value of 6 or less, and n represents a numerical value of 1 or 2.)
When M is Na, the effective pore size is about 4A, C
It is about 5 A in the case of a and about 3 A in the case of K. It is used for the adsorption separation of various substances by utilizing the difference in the size of the pores and the adsorption characteristics. Type A zeolite (where M is K) has an effective pore size of about 3A.
Since it is small and hardly adsorbs water molecules, it is widely used for dehydrating organic solvents and drying gas.
しかしながら、この水分を吸着したＫ−Ａ型ゼオライト
は、通常２００〜４００℃に加熱して再生するため、こ
の吸着−加熱（再生）サイクルの繰り返し中に、ゼオラ
イトの吸着能力が低下することは、以前より知られてい
る。この吸着能力の再生劣化の原因は、再生中の水熱作
用により、ゼオライトの結晶構造 中のＳｉ−Ａｌ結合が切断することが原因であるといわ
れているが、従来のものは、この吸着能力の低下をおさ
えることが困難であった。However, since the KA type zeolite having adsorbed the water is usually heated to 200 to 400 ° C. to be regenerated, the adsorption capacity of the zeolite is lowered during the repetition of the adsorption-heating (regeneration) cycle. Known more than before. The cause of this regeneration deterioration of adsorption capacity is the crystal structure of zeolite due to hydrothermal action during regeneration. It is said that the cause is the breaking of the Si-Al bond in the inside, but it has been difficult for the conventional ones to suppress this decrease in adsorption capacity.
本発明は、このような熱サイクルに耐えるしかも吸着能
力のすぐれたＡ型ゼオライト系吸着剤を提供せんとする
ものである。The present invention is intended to provide an A-type zeolite-based adsorbent that can withstand such a thermal cycle and has an excellent adsorption capacity.
〔問題点を解決するための手段〕及び〔作用〕 本発明者は、Ａ型ゼオライト系吸着剤の熱安定性および
水分の選択吸着性を改善すべく、鋭意研究を重ねたとこ
ろ、驚くべきことに従来提案されており、かつ実施され
ているＡ型ゼオライトの組成領域とは異なるところです
ぐれた性能を示すＡ型ゼオライトを知見し、本発明を完
成させた。[Means for Solving Problems] and [Action] The present inventor has conducted extensive studies to improve the thermal stability and the selective adsorption of water of the A-type zeolite adsorbent, which is surprising. The present inventors have completed the present invention by discovering an A-type zeolite exhibiting excellent performance in a region different from the composition region of the A-type zeolite that has been conventionally proposed and implemented.
すなわち、本発明は、酸化物のモル比で表わした場合、
次の一般式； [xK2O・yMe2O]・Al2O3・(2.0±0.2)SiO2・(0〜4.5)H2O （式中、０．１＜ｘ≦０．３５、かつ０．９＜ｘ＋ｙ＜
１．１の範囲にあり、ＭｅはＮａおよび／又はＬｉを示
す） で表わされるＡ型ゼオライトであり、かつ該ゼオライト
のＣＯ２ガス吸着量が２５℃における吸着圧力２５０mm
Hgの条件で５重量％以下であるカリウム担持Ａ型ゼオラ
イトを有効成分とするＡ型ゼオライト吸着剤にかかるも
のである。That is, the present invention, when expressed by the molar ratio of the oxide,
The following general formula: [xK 2 O ・ yMe 2 O] ・ Al 2 O 3・ (2.0 ± 0.2) SiO 2・ (0-4.5) H 2 O (wherein 0.1 <x ≦ 0.35, And 0.9 <x + y <
In the range of 1.1, Me is Na and / or Li) and is an A-type zeolite represented by the formula (1), and the adsorption amount of CO 2 gas of the zeolite is 250 mm at 25 ° C.
The present invention relates to an A-type zeolite adsorbent containing a potassium-supporting A-type zeolite of 5% by weight or less under Hg conditions as an active ingredient.
本発明におけるＡ型ゼオライトは有効細孔径が約３Åと
いわれる３Ａ型ゼオライトに属すもので、このようなゼ
オライトは通常少なくともイオン交換当量の３３％以上
のカリウムで置換されたものであるとされるが、本発明
においてはカリウム交換率が前記のように１０〜３５％
の範囲の通常のものより少ない組成領域にあることを特
徴とする。The A-type zeolite in the present invention belongs to 3A-type zeolite which is said to have an effective pore size of about 3Å, and such a zeolite is usually substituted with at least 33% or more of the ion exchange equivalent of potassium. In the present invention, the potassium exchange rate is 10 to 35% as described above.
The composition is characterized by being in a composition region less than usual in the range of.
このようなＡ型ゼオライトはその組成により、ＣＯ２ガ
ス吸着量は異なるが、本発明は上記組成のＡ型ゼオライ
トのうち、ＣＯ２ガス吸着量が２５℃における吸着圧力
２５０mmHg、より好ましくは７００mmHgの条件で５重量
％以下であることが第２の特徴である。Although such a type A zeolite has a different amount of CO 2 gas adsorption depending on its composition, in the present invention, among the type A zeolite having the above composition, the amount of CO 2 gas adsorption is 250 mmHg, more preferably 700 mmHg at 25 ° C. The second characteristic is that the content is 5% by weight or less.
このように、ＣＯ２ガス吸着量が非常に少ないことか
ら、本発明におけるＡ型ゼオライトは有効細孔径が約３
Å程度であると推定されるが、カリウム交換率が少ない
ところでこのような特徴を見い出されるのは予想外であ
り、その少ないが故に熱安定性に著しくすぐれているこ
とがわかった。As described above, since the amount of CO 2 gas adsorption is very small, the A-type zeolite in the present invention has an effective pore size of about 3
Although it is estimated to be about Å, it is unexpected that such a feature is found in the case where the potassium exchange rate is low, and it was found that the thermal stability is remarkably excellent due to the small amount.
かかるゼオライトは、特に水分の吸脱着にすぐれている
ところから乾燥剤として好適である。Such a zeolite is particularly suitable as a desiccant because it is excellent in water absorption and desorption.
次に、本発明にかかる吸着剤はナトリウムＡ型ゼオライ
トを出発原料として、イオン交換処理により、酸化物モ
ル比で表わした場合、次の一般式； [xK2O・yMe2O]・Al2O3・(2.0±0.2)SiO2・(0〜4.5)H2O （式中、ｘ，ｙ及びＭｅは前記式と同じ意義を示す）で
表わされるカリウム担持のＡ型ゼオライトを得、次いで
該ゼオライトを温度４００℃以上でゼオライトの分解温
度以下で熱処理することを特徴として製造することがで
きる。Next, the adsorbent according to the present invention has the following general formula: [xK 2 O · yMe 2 O] · Al 2 when represented by the oxide molar ratio by ion exchange treatment using sodium A type zeolite as a starting material. A potassium-supported A-type zeolite represented by O 3 · (2.0 ± 0.2) SiO 2 · (0-4.5) H 2 O (wherein x, y and Me have the same meaning as the above formula) is obtained, and then The zeolite can be manufactured by a heat treatment at a temperature of 400 ° C. or higher and a temperature of decomposition of the zeolite or lower.
出発原料となるナトリウムＡ型ゼオライトは周知であ
り、その製法も種々あるが製造履歴に関係なく用いるこ
とができる。Sodium A-type zeolite as a starting material is well known, and there are various methods for producing it, but it can be used regardless of the production history.
また、このことは粒子径や形状にも関係なく制限されな
いことを意味するが、多くの場合コールターカウンター
法による粒度分布測定法により求められる平均粒子径は
0.5〜７μｍの範囲にあるものがよい。Further, this means that there is no limitation regardless of the particle size and shape, but in many cases the average particle size obtained by the particle size distribution measurement method by the Coulter counter method is
It is preferably in the range of 0.5 to 7 μm.
ナトリウムＡ型ゼオライトのイオン交換処理は周知であ
り、例えばナトリウムＡ型ゼオライトをイオン交換すべ
き金属塩水溶液と接触（この場合必要に応じ順次経時的
に接触を重ねる）するか、金属塩の混合溶液を同時に接
触してイオン交換を行う。この場合通常はゼオライトス
ラリーの懸濁体でイオン交換するが、他の方法としてカ
ラム方式により行っても差し支えない。Ion exchange treatment of sodium A-type zeolite is well known, and for example, sodium A-type zeolite is contacted with an aqueous solution of a metal salt to be ion-exchanged (in this case, the contact is successively repeated over time) or a mixed solution of metal salts. Are simultaneously contacted for ion exchange. In this case, the ion exchange is usually carried out with a suspension of the zeolite slurry, but other methods may be carried out by a column system.
なお、イオン交換処理は処理後のＡ型ゼオライトの組成
が前記の範囲内で行われるべく設定された条件で行うこ
とは言うまでもない。It is needless to say that the ion exchange treatment is performed under the conditions set so that the composition of the type A zeolite after the treatment is within the above range.
次に、イオン交換処理により得られる上記組成イオン交
換率を有するＡ型ゼオライトを４００℃以上でそのゼオ
ライトの分解温度以下の温度で熱処理する。Next, the A-type zeolite having the above composition ion exchange rate obtained by the ion exchange treatment is heat-treated at a temperature of 400 ° C. or higher and a temperature not higher than the decomposition temperature of the zeolite.
この処理の必要性の理由は、吸着剤として使用する場合
の熱サイクルに耐える熱安定性のすぐれた特性を得るた
めであると同時に、ＣＯ２ガスの吸着量を低減させるた
めである。The reason for the necessity of this treatment is to obtain the property of excellent thermal stability that withstands thermal cycles when used as an adsorbent, and at the same time to reduce the adsorption amount of CO 2 gas.
このように熱処理によりＣＯ２ガスの吸着量を著しく低
減できることの詳細な機構は明らかではないけれども、
恐らく加熱焼成においてゼオライトの特有の細孔径が微
調整されることによるものと思われる。Although the detailed mechanism of the remarkable reduction of the CO 2 gas adsorption amount by the heat treatment is not clear,
This is probably because the peculiar pore size of zeolite was finely adjusted during heating and calcination.
このような加熱処理は、ゼオライト粉末自体を加熱焼成
しても勿論よいが、工業的にはイオン交換処理したＡ型
ゼオライトの濾過ケーキ又はその乾燥粉末に所望の結合
剤、その他必要に応じた補助添加剤と共に造粒成形した
後に加熱焼成することが有利である。In such heat treatment, the zeolite powder itself may of course be heated and calcined, but industrially, the ion-exchange-treated A-type zeolite filter cake or the dried powder thereof is mixed with a desired binder, and other auxiliary agents as necessary. It is advantageous to heat-fire after granulating with additives.
結合剤としては粘土鉱物、シリカゾル、セメント類、珪
酸アルカリ等があり、他の補助添加剤としてでん粉、パ
ルプ粉末などの造粒物の細孔を調整可能な有機物があげ
られる。Binders include clay minerals, silica sols, cements, alkali silicates and the like, and other auxiliary additives include starch, pulp powder and other organic substances capable of adjusting the pores of granulated products.
加熱処理に要する時間は温度条件によって変るけれども
上記のＣＯ２ガス吸着量が低減し、かつ熱安定性の向上
が計られる限り特に限定する理由はないが、多くの場合
0.5〜８時間の範囲にある。Although the time required for the heat treatment varies depending on the temperature condition, there is no particular limitation as long as the amount of CO 2 gas adsorption is reduced and the thermal stability is improved, but in many cases
It is in the range of 0.5 to 8 hours.
以下、実施例を挙げてさらに具体的に説明する。 Hereinafter, the present invention will be described more specifically with reference to examples.
実施例１ 珪酸ソーダ水溶液とアルミン酸ソーダ水溶液との反応に
より合成したナトリウムＡ型ゼオライト（Na2O・Al2O3・2
SiO2・4.5H2O）の１０重量％スラリーを調製した。Example 1 Sodium A-type zeolite (Na 2 O.Al 2 O 3 .2) synthesized by the reaction of an aqueous sodium silicate solution and an aqueous sodium aluminate solution
A 10 wt% slurry of SiO 2 .4.5H 2 O) was prepared.
このゼオライトスラリー１０００重量部に塩化カリウム
の結晶１７重量部を添加して、常温にて２時間撹拌を続
けてイオン交換処理した。17 parts by weight of crystals of potassium chloride were added to 1000 parts by weight of this zeolite slurry, and stirring was continued at room temperature for 2 hours for ion exchange treatment.
次いで、スラリーを濾過分離し、水洗および乾燥して得
られた粉末を分析したところ、酸化物のモル比で（0.31
K2O・0.69Na2O）・Al2O3・2SiO2・3.8H2Oの組成を有するカ
リウム担持のＡ型ゼオライトであった。Then, the slurry was separated by filtration, washed with water and dried to analyze the powder.
K 2 O · 0.69Na 2 O) · Al 2 O 3 · 2SiO was A-type zeolite potassium bearing having a composition of 2 · 3.8H 2 O.
次いで、このゼオライトを４５０℃において８時間加熱
処理して吸着剤を得た。Next, this zeolite was heat-treated at 450 ° C. for 8 hours to obtain an adsorbent.
実施例２ 市販のナトリウムＡ型ゼオライト（Na2O・Al2O3・2SiO2・
4.1H2O）を水に分散させて２０重量％スラリー５００重
量部を調製した。Example 2 Commercially available sodium A type zeolite (Na 2 O · Al 2 O 3 · 2SiO 2 ·
4.1H 2 O) was dispersed in water to prepare 500 parts by weight of a 20% by weight slurry.
次いで、塩化カリウム１０重量部，塩化リチウム（無水
換算）５重量部をゼオライトスラリーに添加して６０℃
にて１時間イオン交換処理をした。Then, 10 parts by weight of potassium chloride and 5 parts by weight of lithium chloride (anhydrous basis) are added to the zeolite slurry to 60 ° C.
Was subjected to ion exchange treatment for 1 hour.
得られたゼオライトを分析したところ（0.16K2O・0.09Li
2O・0.75Na2O）・Al2O3・2SiO2・4.5H2Oの組成を有するカリ
ウム−リチウム担持のＡ型ゼオライトであった。このゼ
オライトを５００℃において５時間加熱処理して吸着剤
を得た。When the obtained zeolite was analyzed (0.16K 2 O ・ 0.09Li
Potassium having a composition of 2 O · 0.75Na 2 O) · Al 2 O 3 · 2SiO 2 · 4.5H 2 O - were A-type zeolite of lithium bearing. This zeolite was heat-treated at 500 ° C. for 5 hours to obtain an adsorbent.
実施例３ 実施例１で得られた加熱処理前のイオン交換したゼオラ
イト粉末１００重量部にカオリン粘土２０重量部を適量
の水と共に混練した後、造粒機にかけ、φ3.2mmの大き
さの造粒物をそれぞれ得た。Example 3 100 parts by weight of the ion-exchanged zeolite powder before heat treatment obtained in Example 1 was kneaded with 20 parts by weight of kaolin clay together with an appropriate amount of water, and the mixture was subjected to a granulator to produce a pellet having a size of φ3.2 mm. Granules were obtained respectively.
次いで、この造粒物を各実施例で処理したと同じ加熱条
件で同様に加熱処理してそれぞれ吸着剤を得た。Next, this granulated product was heat-treated in the same manner under the same heating conditions as those used in each of the Examples to obtain adsorbents.
比較例１ 市販のナトリウムＡ型ゼオライト（Na2O・Al2O3・2SiO2・
4.5H2O）を水に分散させて２０重量％スラリー５００重
量部を調製した。Comparative Example 1 Commercially available sodium A-type zeolite (Na 2 O · Al 2 O 3 · 2SiO 2 ·
4.5H 2 O) was dispersed in water to prepare 500 parts by weight of a 20% by weight slurry.
次いで、塩化カリウム２５重量部を添加して、６０℃に
て１時間攪拌を続けてイオン交換処理した。Next, 25 parts by weight of potassium chloride was added, and stirring was continued at 60 ° C. for 1 hour for ion exchange treatment.
次いで、スラリーを濾過分離し、水洗および乾燥して得
られた粉末を分析したところ、酸化物モル比で（0.36K2
O・0.64Na2O）・Al2O3・2SiO2・3.7H2Oの組成を有するカリ
ウム担持のＡ型ゼオライトであった。Next, the slurry was separated by filtration, washed with water and dried to analyze the powder, which showed that the oxide molar ratio was (0.36K 2
O · 0.64Na 2 O) · Al 2 O 3 · 2SiO was A-type zeolite potassium bearing having a composition of 2 · 3.7H 2 O.
次いで、このゼオライトを６５０℃において２時間加熱
処理し吸着剤を得た。Next, this zeolite was heat-treated at 650 ° C. for 2 hours to obtain an adsorbent.
比較例２ 塩化カリウム33.3重量部を添加した以外は、比較例１と
同様の方法で（0.42K2O・0.57Na2O）・Al2O3・2SiO2・4.1H2
Oの吸着剤を得た。Comparative Example 2 except for adding potassium chloride 33.3 parts by weight, in the same manner as in Comparative Example 1 (0.42K 2 O · 0.57Na 2 O) · Al 2 O 3 · 2SiO 2 · 4.1H 2
An O adsorbent was obtained.
比較例３ 塩化カリウム５０重量部を添加した以外は比較例１と同
様の方法で（0.50K2O・0.48Na2O）・Al2O3・2SiO2・3.8H2O
の吸着剤を得た。Except for adding Comparative Example 3 Potassium chloride 50 parts by weight in the same manner as in Comparative Example 1 (0.50K 2 O · 0.48Na 2 O) · Al 2 O 3 · 2SiO 2 · 3.8H 2 O
The adsorbent was obtained.
水分吸着能試験 実施例１〜３および比較例１〜３で得た試料吸着剤１０
０ｇを円筒状のステンレス容器（φ５０mm，高さ１３０
mm）に入れ、温度２５℃、相対湿度８０％の恒温恒湿槽
中で２４時間吸湿させる。翌日、電気炉（φ３００mm，
高さ３００mm，カンタル炉）中で３００℃、２時間再生
を行なう。この再生品の一部を、水分吸着能の測定用と
し、残部は、再度前記と同様の恒温恒湿槽中で２４時間
吸湿する。この熱サイクル操作を２５回繰り返した。
又、採取した試料は硫酸アンモニウム飽和溶液を入れた
恒湿槽（相対湿度８０％）中で５日間吸湿処理後、８０
０℃で２時間焼成して、下記の計算により水分吸着能を
求めた。Water adsorption capacity test Sample adsorbent 10 obtained in Examples 1 to 3 and Comparative Examples 1 to 3
0g cylindrical stainless steel container (φ50mm, height 130
mm) and allow it to absorb moisture for 24 hours in a thermo-hygrostat at a temperature of 25 ° C. and a relative humidity of 80%. Next day, electric furnace (φ300mm,
Regeneration at 300 ° C for 2 hours in a Kanthal furnace (height 300 mm). A part of this recycled product is used for measuring the water adsorption capacity, and the rest is again absorbed in a constant temperature and humidity chamber for 24 hours. This heat cycle operation was repeated 25 times.
In addition, the collected sample was subjected to moisture absorption treatment for 5 days in a constant humidity tank (80% relative humidity) containing a saturated ammonium sulfate solution,
It was baked at 0 ° C. for 2 hours, and the water adsorption capacity was calculated by the following calculation.
その結果を第１表に示す。 The results are shown in Table 1.
ＣＯ２吸着能試験 ４００℃，２時間脱気処理した試料吸着剤をソープトマ
チク１８００型比表面積測定装置（カルロエルバ社製）
を用いて、２５℃において各測定圧力のもとにＣＯ２の
吸着能を測定したところ、第２表の結果が得られた。 CO 2 adsorption capacity test A sample adsorbent that has been degassed at 400 ° C. for 2 hours is a Sorptomatic 1800 specific surface area measuring device (manufactured by Carlo Erba)
Was used to measure the CO 2 adsorption capacity at 25 ° C. under each measurement pressure, and the results shown in Table 2 were obtained.
この結果から明らかなようにＣＯ２ガス吸着能が低い場
合は、これと同等の分子径を示すアセチレン等の有機ガ
スを実質的に吸着しないことから、本発明にかかる吸着
剤の細孔径が３Åであることを意味し、また、混合ガス
中における水分除去をする場合、本発明にかかる吸着剤
は再生使用において耐コーキング性もすぐれていること
がわかる。 As is clear from this result, when the CO 2 gas adsorption capacity is low, it does not substantially adsorb organic gas such as acetylene having a molecular diameter equivalent to this, so the pore size of the adsorbent according to the present invention is 3Å It also means that the adsorbent according to the present invention has excellent caulking resistance in the case of reusing when water is removed from the mixed gas.
本発明にかかるＡ型ゼオライト系吸着剤は従来とは異っ
た組成領域のものであって熱安定性にすぐれ、水の吸脱
着に伴う熱サイクルに耐える実用上にすぐれたものであ
る。The A-type zeolite adsorbent according to the present invention has a composition region different from the conventional ones, is excellent in thermal stability, and is practically excellent in enduring a thermal cycle associated with water adsorption / desorption.
また、かかる吸着剤は、本発明にかかる製法によれば工
業的に有利に製造できる。Further, such an adsorbent can be industrially advantageously produced by the production method according to the present invention.
Claims (1)
式； [xK2O・yMe2O]・Al2O3・(2.0±0.2)SiO2・(0〜4.5)H2O （式中、０．１＜ｘ≦０．３５、かつ０．９＜ｘ＋ｙ＜
１．１の範囲にあり、ＭｅはＮａおよび／又はＬｉを示
す） で表わされるＡ型ゼオライトであり、かつ該ゼオライト
のＣＯ２ガス吸着量が２５℃における吸着圧力２５０mm
Hgの条件で５重量％以下であるカリウム担持Ａ型ゼオラ
イトを有効成分とするＡ型ゼオライト吸着剤。1. When expressed by the molar ratio of oxides, the following general formula; [xK 2 O · yMe 2 O] · Al 2 O 3 · (2.0 ± 0.2) SiO 2 · (0 to 4.5) H 2 O (wherein 0.1 <x ≦ 0.35 and 0.9 <x + y <
In the range of 1.1, Me is Na and / or Li) and is an A-type zeolite represented by the formula (1), and the adsorption amount of CO 2 gas of the zeolite is 250 mm at 25 ° C.
An A-type zeolite adsorbent containing potassium-supporting A-type zeolite in an amount of 5% by weight or less under an Hg condition as an active ingredient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16402985A JPH0628726B2 (en) | 1985-07-26 | 1985-07-26 | Type A zeolite adsorbent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16402985A JPH0628726B2 (en) | 1985-07-26 | 1985-07-26 | Type A zeolite adsorbent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6227038A JPS6227038A (en) | 1987-02-05 |
| JPH0628726B2 true JPH0628726B2 (en) | 1994-04-20 |
Family
ID=15785449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16402985A Expired - Lifetime JPH0628726B2 (en) | 1985-07-26 | 1985-07-26 | Type A zeolite adsorbent |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0628726B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8713405D0 (en) * | 1987-06-09 | 1987-07-15 | Laporte Industries Ltd | Purification of gases |
| CN112357931A (en) * | 2020-10-22 | 2021-02-12 | 中海油天津化工研究设计院有限公司 | Method for synthesizing integral NaKA molecular sieve with controllable pore structure and application |
-
1985
- 1985-07-26 JP JP16402985A patent/JPH0628726B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6227038A (en) | 1987-02-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5868818A (en) | Adsorbent for air separation, production method thereof, and air-separation method using it | |
| KR930000531B1 (en) | Nitrogen seperating method from nitrogen mixture containing less polar materials | |
| US3773690A (en) | Zeolite adsorbents | |
| US6537348B1 (en) | Method of adsorptive separation of carbon dioxide | |
| JP2740470B2 (en) | Crystalline metal silicate composition, its synthesis method and adsorption separation method of adsorbed gas | |
| US4125591A (en) | Process for producing rare earth exchanged crystalline aluminosilicate | |
| JP3050147B2 (en) | Adsorbent for air separation, production method thereof and air separation method using the same | |
| EP0912240B1 (en) | Zeolite containing cation exchangers, methods for preparation, and use | |
| US3158579A (en) | Molecular sieve sorbents bonded with ion-exchanged clay | |
| JPH0653569B2 (en) | Method for increasing the crushing strength of zeolite granules | |
| JP2001240410A (en) | Method for manufacturing ion-exchanged molecular sieve | |
| JPH0628726B2 (en) | Type A zeolite adsorbent | |
| JP2000210557A (en) | Molded product containing x-type zeolite, manufacture and use application thereof | |
| JP4873108B2 (en) | Carbon dioxide adsorption separation method | |
| JPH07165418A (en) | Production of zeolite | |
| JPH03295805A (en) | X-type zeolite molded body and its production | |
| JPH0739752A (en) | Adsorbent of carbon dioxide and manufacture thereof | |
| JP2000211915A (en) | Formed compact containing low-silica x type zeolite, its production and use thereof | |
| CN103933928A (en) | Dehumidification adsorbent and preparation method thereof | |
| JPH0529603B2 (en) | ||
| JPH0141380B2 (en) | ||
| JPS6227037A (en) | Thermally stable k-a type zeolite composition | |
| JPS629524B2 (en) | ||
| JP3528269B2 (en) | High heat resistant mordenite type zeolite and method for producing the same | |
| JPH10128106A (en) | Adsorbent for oxygen psa(pressure swing adsorption), its preparation and preparation of oxygen using it |