JPH0564747A - Method and device for coating catalyst carrier with catalyst composition - Google Patents
Method and device for coating catalyst carrier with catalyst compositionInfo
- Publication number
- JPH0564747A JPH0564747A JP3273334A JP27333491A JPH0564747A JP H0564747 A JPH0564747 A JP H0564747A JP 3273334 A JP3273334 A JP 3273334A JP 27333491 A JP27333491 A JP 27333491A JP H0564747 A JPH0564747 A JP H0564747A
- Authority
- JP
- Japan
- Prior art keywords
- catalyst carrier
- slurry
- catalyst
- coating
- coating liquid
- 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
Links
- 239000003054 catalyst Substances 0.000 title claims abstract description 115
- 238000000576 coating method Methods 0.000 title claims abstract description 84
- 239000011248 coating agent Substances 0.000 title claims abstract description 82
- 239000000203 mixture Substances 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims description 18
- 239000002002 slurry Substances 0.000 claims abstract description 31
- 239000002243 precursor Substances 0.000 claims abstract description 14
- 239000012528 membrane Substances 0.000 claims description 10
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000011247 coating layer Substances 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 description 50
- 239000000243 solution Substances 0.000 description 19
- 239000000463 material Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000007598 dipping method Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 230000006837 decompression Effects 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 239000005060 rubber Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 229910052878 cordierite Inorganic materials 0.000 description 2
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 229910052809 inorganic oxide Inorganic materials 0.000 description 2
- 239000010970 precious metal Substances 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000006255 coating slurry Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910001947 lithium oxide Inorganic materials 0.000 description 1
- 229910052919 magnesium silicate Inorganic materials 0.000 description 1
- 235000019792 magnesium silicate Nutrition 0.000 description 1
- 239000000391 magnesium silicate Substances 0.000 description 1
- ZADYMNAVLSWLEQ-UHFFFAOYSA-N magnesium;oxygen(2-);silicon(4+) Chemical compound [O-2].[O-2].[O-2].[Mg+2].[Si+4] ZADYMNAVLSWLEQ-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 229910052611 pyroxene Inorganic materials 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 238000001238 wet grinding Methods 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、触媒担体に触媒組成物
をコーティングする方法及びその装置に関し、詳細には
種々の素材，形態を有する触媒担体に、触媒組成物若し
くはその前駆体又はその構造物若しくはその前駆体（以
下単に触媒組成物という）のスラリー又は溶液（以下コ
ーティング液という）を効率良く浸漬する方法及びその
装置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 coating a catalyst carrier with a catalyst composition and an apparatus therefor, and in particular to a catalyst carrier having various materials and forms, a catalyst composition or a precursor thereof or a structure thereof. The present invention relates to a method and an apparatus for efficiently immersing a slurry or a solution (hereinafter referred to as a coating solution) of an object or a precursor thereof (hereinafter referred to as a catalyst composition).
【０００２】[0002]
【従来の技術】一体構造体型の触媒担体、例えばハニカ
ム型担体は、コンパクトであると共に処理ガス供給時の
圧損が少ないという特徴を有しており、一般産業排気ガ
スの浄化用や脱臭用等に広く利用されている。2. Description of the Related Art A monolithic structure type catalyst carrier, such as a honeycomb type carrier, is characterized in that it is compact and has little pressure loss when supplying a processing gas, and is suitable for purification of general industrial exhaust gas and deodorization. Widely used.
【０００３】これらの触媒は、触媒担体に触媒組成物を
コーティングすることにより製造されており、その一般
的な製造方法としては、触媒担体をコーティング液に浸
漬し、余剰のコーティング液を加圧空気等により除去す
るコーティング方法（特公昭６２−１７８４号）が挙げ
られる。また上記以外のコーティング方法としては、触
媒担体の上方から内部にコーティング液を流入させると
共に、該触媒担体の下部から真空引きすることによって
コーティング液を触媒担体の内部に通過させ、さらに一
定の真空度に保つことにより余剰のコーティング液を除
去する方法（特公昭６２−２８６９５号）が提案されて
いる。その他特開昭６０−２２５６５３号、同６１−２
４２６４３号公報には、所定のコーティング液を入れた
容器に触媒担体の下部を浸漬した状態で触媒担体の上方
より真空引きしてコーティング液を触媒担体の内部を下
方から上方へ通過させコーティングする方法が開示され
ている。These catalysts are produced by coating a catalyst carrier with a catalyst composition. As a general method for producing the catalyst, the catalyst carrier is immersed in a coating solution, and the excess coating solution is pressurized with air. A coating method (Japanese Examined Patent Publication No. 62-1784) which removes it by the method etc. In addition, as a coating method other than the above, the coating liquid is caused to flow into the inside of the catalyst carrier from above the catalyst carrier, and the coating liquid is passed through the inside of the catalyst carrier by evacuation from the lower portion of the catalyst carrier. A method (Japanese Patent Publication No. 62-28695) for removing the excess coating liquid by keeping the temperature at 0.1% has been proposed. Other JP-A-60-225653 and 61-2
JP-A-42643 discloses a method in which a lower part of a catalyst carrier is immersed in a container containing a predetermined coating solution, and a vacuum is drawn from above the catalyst carrier to pass the coating solution through the inside of the catalyst carrier from the bottom to the top. Is disclosed.
【０００４】[0004]
【発明が解決しようとする課題】従来の製造方法のうち
触媒担体（以下ハニカム構造体である場合を代表的に取
り上げる）をコーティング液に浸漬する方法（以下浸漬
法ということがある）においては、触媒担体の内部に形
成されたガス通過用貫通孔（セル）の全面にコーティン
グ液を確実に付着させようとすれば、触媒担体をコーテ
ィング液に長時間浸漬させることが必要となるため、触
媒調製においては効率的ではない。また触媒担体の素
材，セル構造，コーティング液の粘度等の物性によって
は一般的な浸漬法を用いることができない場合がある。Among the conventional manufacturing methods, in the method of immersing the catalyst carrier (hereinafter, the case of the honeycomb structure is representatively taken) in the coating liquid (hereinafter sometimes referred to as the immersion method), In order to ensure that the coating solution is adhered to the entire surface of the gas passage through-hole (cell) formed inside the catalyst carrier, it is necessary to immerse the catalyst carrier in the coating solution for a long time. Is not efficient at. In addition, depending on the physical properties such as the material of the catalyst carrier, the cell structure, the viscosity of the coating liquid, etc., the general dipping method may not be used.
【０００５】さらに、装置として触媒担体をコーティン
グ液に完全に沈めるだけの大型の容器が必要になり、こ
れに比例してコーティング液も数倍の量が必要となり不
経済でもある。Further, as a device, a large container for completely submerging the catalyst carrier in the coating liquid is required, and in proportion to this, the coating liquid is also required to be several times larger, which is uneconomical.
【０００６】一方コーティング液を真空圧力で直接触媒
担体内部に吸入または圧入する方法は、前述の浸漬法に
比べ、コーティング時間が短く、かつ種々のコーティン
グ液に適用できる。しかしながら空気圧の設定が難し
く、コーティング液や触媒担体の物性によっては触媒担
体の内部で偏流しやすく、均一なコーティング層を有す
る触媒を得ることが困難である。On the other hand, the method of directly sucking or press-fitting the coating solution into the catalyst carrier at a vacuum pressure has a shorter coating time than the above-mentioned dipping method and can be applied to various coating solutions. However, it is difficult to set the air pressure, and depending on the physical properties of the coating liquid and the catalyst carrier, it is easy for the catalyst to flow unevenly inside the catalyst carrier, making it difficult to obtain a catalyst having a uniform coating layer.
【０００７】本発明は上記事情に着目してなされたもの
であって、第１の目的は、触媒担体に触媒組成物をコー
ティングするにあたり、必要最小限のコーティング液に
より均一なコーティング層を効率よく形成することので
きる方法を提供することにあり、第２の目的は上記方法
を効率良く行なうためにコンパクトに構成された装置の
提供にある。The present invention has been made in view of the above circumstances. A first object of the present invention is to coat a catalyst carrier with a catalyst composition efficiently with a minimum necessary coating liquid to form a uniform coating layer. A second object is to provide a device which is compact in order to efficiently carry out the above method.
【０００８】[0008]
【課題を解決するための手段】上記第１の目的を達成し
た本発明方法とは、触媒担体の下方に触媒組成物のコー
ティング液を置き、該コーティング液を、その下部にあ
る伸縮性膜の変形によって上昇、下降させ、前記触媒担
体を上記コーティング液に浸漬する工程を包含すること
を要旨とするものであり、第２の目的を達成した本発明
装置とは、触媒担体保持部の下方に、多数の孔を有する
板を設置し、さらにその下方には底部に伸縮性膜を有す
るコーティング液溜めを接続し、該溜めの底部に加圧ノ
ズルと減圧ノズルを有する加減圧容器を連結してなるこ
とを要旨とするものである。Means for Solving the Problems The method of the present invention which has achieved the first object is to place a coating solution of a catalyst composition below a catalyst carrier, and apply the coating solution to a stretchable film under the coating solution. The gist of the present invention is to include a step of raising and lowering by deformation and immersing the catalyst carrier in the coating liquid, and the apparatus of the present invention that achieves the second object is provided below the catalyst carrier holding portion. , A plate having a large number of holes is installed, a coating solution reservoir having a stretchable film is connected to the bottom of the plate, and a pressurizing / depressurizing container having a pressure nozzle and a pressure reducing nozzle is connected to the bottom of the reservoir. The point is to become.
【０００９】[0009]
【作用】本発明者らは鋭意研究を重ねた結果、伸縮性膜
の上方に触媒担体をセットし、上記伸縮性膜上にコーテ
ィング液を溜め、該伸縮性膜の上方への変形によりコー
ティング液を上昇させて、上記触媒担体の下方からコー
ティング液を供給して浸漬させ、次に上記伸縮性膜の下
方への変形によりコーティング液を下降させれば触媒担
体のコーティング液からの取り出しが簡単に行なわれ、
しかも必要最小限のコーティング液で、均一にコーティ
ング層が形成できるとの知見を得、本発明に想到した。As a result of intensive studies by the present inventors, the catalyst carrier is set above the elastic membrane, the coating solution is accumulated on the elastic membrane, and the upward deformation of the elastic membrane causes the coating solution. And the coating liquid is supplied from below the catalyst carrier to immerse it, and then the coating liquid is lowered by the downward deformation of the stretchable membrane, so that the catalyst carrier can be easily taken out from the coating liquid. Done,
Moreover, the inventors have found that a coating layer can be uniformly formed with the minimum necessary coating liquid, and have conceived the present invention.
【００１０】図１は本発明に係る装置を示す概略説明図
であり、本発明装置は大別して触媒担体保持部１０，コ
ーティング液容器部２０，加減圧容器部３０により構成
される。FIG. 1 is a schematic explanatory view showing an apparatus according to the present invention. The apparatus of the present invention is roughly divided into a catalyst carrier holding portion 10, a coating liquid container portion 20, and a pressurizing / depressurizing container portion 30.
【００１１】触媒担体保持部１０はコーティング液受け
部１１，シール部１２，触媒担体受け部１３を有してお
り、触媒担体１を装着するにあたっては、リング状に配
設された上記シール部１２が弛緩した状態で上記触媒担
体受け部１３のやや上方に触媒担体１を仮保持し、上記
シール部１２を縮径させて触媒担体１を外周側から把持
すると同時にシールする。本発明は該シール部１２を拡
縮させて触媒担体を固定する手段を限定するものではな
く、例えばシール部分をゴム等の伸縮性のある弾性部
材を用い、該弾性部材を介して触媒担体１を機械的に外
部から締め付けて固定する方法や、シール部分をゴム
管により浮き輪状に構成し、該ゴム管内に空気を導入す
ることによりゴム管を膨張させて触媒担体１を固定する
方法等が挙げられる。尚上記シール部の形状は、触媒担
体の形状や容器に応じて適宜選択すればよい。The catalyst carrier holding portion 10 has a coating liquid receiving portion 11, a seal portion 12, and a catalyst carrier receiving portion 13. When the catalyst carrier 1 is mounted, the seal portion 12 is arranged in a ring shape. In the relaxed state, the catalyst carrier 1 is temporarily held slightly above the catalyst carrier receiving portion 13, the diameter of the seal portion 12 is reduced, and the catalyst carrier 1 is gripped from the outer peripheral side and simultaneously sealed. The present invention does not limit the means for fixing the catalyst carrier by expanding and contracting the seal portion 12, and for example, an elastic member having elasticity such as rubber is used for the seal portion, and the catalyst carrier 1 is fixed through the elastic member. Examples include a method of mechanically tightening and fixing from the outside, a method of forming a floating ring-shaped seal portion with a rubber tube, and expanding air by introducing air into the rubber tube to fix the catalyst carrier 1. Be done. The shape of the seal portion may be appropriately selected depending on the shape of the catalyst carrier and the container.
【００１２】コーティング液容器部２０は上記触媒担体
保持部１０の下側に配設され、通液性を備えたストッパ
ー２１と伸縮性膜２２を有するものである。該ストッパ
ー２１は多数の孔を有する部材であればよく、パンチン
グメタルや金網等が例示できるが、強度の面からパンチ
ングメタルが好ましい。孔はコーティング液が偏流する
ことなく流れる程度に形成されていればよいが、孔の大
きさは直径３〜１０mmが好ましく、板厚は加圧時の耐圧
を考慮すると１〜６mmが好ましい。The coating liquid container portion 20 is disposed below the catalyst carrier holding portion 10 and has a stopper 21 and a stretchable membrane 22 having liquid permeability. The stopper 21 may be a member having a large number of holes, and examples thereof include punching metal and wire mesh, but punching metal is preferable from the viewpoint of strength. The holes may be formed to such an extent that the coating liquid flows without uneven distribution, but the size of the holes is preferably 3 to 10 mm in diameter, and the plate thickness is preferably 1 to 6 mm in consideration of the pressure resistance during pressurization.
【００１３】このコーティング液容器部２０にコーティ
ング液を導入するに際しては、上記触媒担体保持部１０
の上方から直接コーティング液を投入することもできる
が、簡便にこの手順をするため、このコーティング液容
器部２０の上方にコーティング液注入口１６及び排出ノ
ズル１４を設けることもできる。When introducing the coating liquid into the coating liquid container portion 20, the catalyst carrier holding portion 10 is used.
Although the coating liquid can be directly injected from above, the coating liquid injection port 16 and the discharge nozzle 14 can be provided above the coating liquid container portion 20 in order to perform this procedure easily.
【００１４】上記伸縮性膜２２は、コーティング液が漏
れず、加圧・減圧に耐えるものであることが必要であ
り、さらには耐薬品性を有するものが好適に用いられ
る。また、膜自体が伸縮しないものも使用できるが、加
圧・減圧の応答性、スペース等を考慮すると、膜自体が
伸縮性を有する天然ゴム膜、合成ゴム膜等が好ましい。
また中央部は金属板や樹脂板で構成し、周囲を伸縮性部
材で構成したものであってもよく、ダイヤフラム式のも
のが例示できる。It is necessary that the stretchable film 22 does not leak the coating liquid and can withstand pressurization and depressurization, and a film having chemical resistance is preferably used. In addition, although the film itself does not expand or contract, a natural rubber film or a synthetic rubber film in which the film itself has elasticity is preferable in view of responsiveness to pressurization / decompression, space and the like.
Further, the central portion may be formed of a metal plate or a resin plate, and the periphery thereof may be formed of an elastic member, and a diaphragm type one can be exemplified.
【００１５】尚上記コーティング液容器部２０と前記触
媒担体保持部１０は脱着自在に構成し、触媒担体の形状
に合わせた触媒担体保持部１０と交換可能にすることが
好ましい。It is preferable that the coating liquid container 20 and the catalyst carrier holder 10 are detachable so that they can be replaced with the catalyst carrier holder 10 that matches the shape of the catalyst carrier.
【００１６】また上記コーティング液容器部２０の下方
には加圧ノズル３２及び減圧ノズル３３を有する加減圧
容器部３０が配設される。尚伸縮性膜の下方側には前記
ストッパー２１と同様の材質により構成された通気性の
あるストッパー３１を設けてもよい。A pressurizing / depressurizing container part 30 having a pressurizing nozzle 32 and a depressurizing nozzle 33 is disposed below the coating liquid container part 20. A breathable stopper 31 made of the same material as the stopper 21 may be provided on the lower side of the stretchable film.
【００１７】該加減圧容器部３０の容量は、触媒担体に
より規定され、触媒担体の容積より大きいものであれば
よいが、装置のコンパクト化を図る上で上記触媒担体よ
り若干大きいものが好ましく、具体的には触媒担体の容
量に対して、３〜１０倍が望ましい。尚上記加減圧容器
部３０の材質は耐圧性のものであれば特に限定されな
い。本発明装置において使用する圧力は、用いるコーテ
ィング液の粘度により異なるが加圧の場合で一般的に0.
5 〜３kg/cm2であり、１〜2.5kg/cm2であればより好ま
しく、減圧の場合で−0.1 〜−1.0kg/cm2 、より好まし
くは−0.5 〜−1.0kg/cm2 である。The capacity of the pressurizing / depressurizing container section 30 is defined by the catalyst carrier and may be larger than the capacity of the catalyst carrier, but is preferably slightly larger than the above catalyst carrier in order to make the apparatus compact. Specifically, it is preferably 3 to 10 times the capacity of the catalyst carrier. The material of the pressurizing / depressurizing container section 30 is not particularly limited as long as it is pressure resistant. The pressure used in the device of the present invention varies depending on the viscosity of the coating liquid used, but is generally 0.
5 is a ~3kg / cm 2, more preferably if 1~2.5kg / cm 2, -0.1 ~- 1.0kg / cm 2 in the case of decompression, more preferably at -0.5 ~-1.0kg / cm 2 ..
【００１８】尚コーティング液容器部２０と加減圧容器
部３０は着脱自在に構成し、上記伸縮性膜２２を交換可
能にすることが好ましい。It is preferable that the coating liquid container portion 20 and the pressurizing / depressurizing container portion 30 are detachable so that the stretchable film 22 can be replaced.
【００１９】従って本発明に係る装置を用いて、触媒担
体に触媒組成物をコーティングするにあたっては下記の
手順で行えばよい。Therefore, when the catalyst composition is coated on the catalyst carrier using the apparatus according to the present invention, the following procedure may be performed.
【００２０】まず触媒担体保持部１０に触媒担体１をセ
ットし、シール部１２を縮径させてこれを保持する。次
に図示しないコーティング液タンクに接続されたコーテ
ィング液注入口１６からコーティング液容器部２０内へ
コーティング液を供給する。コーティング液は伸縮性膜
２２上に溜まり、所定量供給されると上記伸縮性膜２２
は一点鎖線で示す２２ａの状態まで垂れ下がる。ここで
加減圧容器部３０の減圧ノズル３３側を閉鎖し、加圧ノ
ズル３２からガスを導入する。上記加減圧容器部３０の
内部に所定圧力までガスを圧入して上記伸縮性膜２２を
二点鎖線で示す２２ｂの状態まで押し上げる。First, the catalyst carrier 1 is set in the catalyst carrier holding portion 10 and the seal portion 12 is contracted to hold it. Next, the coating liquid is supplied into the coating liquid container 20 from the coating liquid inlet 16 connected to a coating liquid tank (not shown). The coating liquid accumulates on the stretchable film 22, and when supplied in a predetermined amount, the stretchable film 22 is
Hangs down to the state of 22a indicated by the alternate long and short dash line. Here, the pressure reducing nozzle 33 side of the pressurizing / depressurizing container portion 30 is closed, and gas is introduced from the pressurizing nozzle 32. Gas is injected into the pressurizing / depressurizing container section 30 up to a predetermined pressure to push up the stretchable membrane 22 to a state of 22b indicated by a two-dot chain line.
【００２１】この様に伸縮性膜が上昇することによって
伸縮性膜２２上に溜められていたコーティング液は、外
周面側がシールされている触媒担体１の内部を通過して
上昇し上部からオーバーフローする。オーバーフローし
たコーティング液はドレン１５から前記コーティング液
タンクに回収され、一方上記触媒担体１の内部に充填さ
れたコーティング液は加減圧容器３０を減圧することで
流下しコーティング容器２０内へ戻され伸縮性膜２２上
に溜められる。最後にシール部１２を開放して触媒担体
１を取り出せばよい。As the elastic film rises in this way, the coating liquid accumulated on the elastic film 22 passes through the inside of the catalyst carrier 1 whose outer peripheral surface side is sealed and ascends, and overflows from the upper part. .. The overflowed coating liquid is collected from the drain 15 into the coating liquid tank, while the coating liquid filled inside the catalyst carrier 1 flows down by depressurizing the pressurizing / depressurizing container 30 and is returned to the coating container 20 to expand and contract. Stored on the membrane 22. Finally, the seal part 12 may be opened and the catalyst carrier 1 may be taken out.
【００２２】尚繰り返しコーティングするにあたって
は、コーティング液の減少分を１サイクルごとに補充し
てもよく、また１サイクルが終了して触媒担体を取りは
ずした後に再度加減圧容器３０を加圧して残りのコーテ
ィング液を排出ノズル１４から抜き、新たにコーティン
グ液注入口１６よりコーティング液を供給してもよい。
尚洗浄専用のドレンを設けることも本発明に含まれる。
またコーティングが終了してコーティング液を排出した
後に上記排出ノズル１４から真空引きを行ない触媒担体
内部に付着した余分のコーティング液の除去を促進して
もよい。In repeated coating, the depleted amount of the coating liquid may be replenished every cycle, or after the completion of one cycle, the catalyst carrier is removed and the pressurizing / depressurizing container 30 is pressurized again. The coating liquid may be discharged from the discharge nozzle 14 and the coating liquid may be newly supplied from the coating liquid inlet 16.
It should be noted that providing a drain only for cleaning is also included in the present invention.
Further, after the coating is completed and the coating liquid is discharged, a vacuum may be drawn from the discharge nozzle 14 to promote the removal of the excess coating liquid adhering to the inside of the catalyst carrier.
【００２３】本発明は触媒担体によって限定されず一体
構造型であればよく、種々の材質，形状，構造のものが
適用できる。材質としてはケイセン石，ケイ石マグネシ
ウム，ジルコン，ベタライト，リチア輝石，コージェラ
イト，アルミナケイ酸塩，ムライト等のセラミックス
や、鉄，フェライト系ステンレス等の金属が例示でき、
その構造としては断面形状が円形または楕円形の円筒体
であって各種ハニカム構造のもの、貫通口を有するハニ
カムモノリス、出口側入口側の一方を交互に目封じして
壁面の細孔によりガスを通過させる構造体（いわゆるプ
ラグハニカムモノリス）、コルゲート型構造体、発泡体
構造を有するいわゆるセラミックフォーム等が挙げられ
る。The present invention is not limited to the catalyst carrier and may be of any one-piece structure, and various materials, shapes and structures can be applied. Examples of the material include ceramics such as silicate stone, magnesium silicate, zircon, betalite, lithia pyroxene, cordierite, alumina silicate, and mullite, and metals such as iron and ferritic stainless steel.
Its structure is a cylindrical body having a circular or elliptical cross-section and various honeycomb structures, a honeycomb monolith having a through hole, and one of the outlet side and the inlet side is alternately plugged to discharge gas through the pores of the wall surface. Examples thereof include a structure to be passed (so-called plug honeycomb monolith), a corrugated structure, a so-called ceramic foam having a foam structure, and the like.
【００２４】また本発明はコーティング液によっても限
定されるものではなく、触媒組成物若しくはその前駆体
または触媒組成物の構造物若しくはその前駆体のスラリ
ーまたは溶液を用いればよく、本発明において触媒組成
物のスラリーとは、貴金属を多孔質耐火性無機酸化物に
担持した粉体を湿式粉砕して得られたスラリー等を言
い、触媒組成物の前駆体のスラリーとは、貴金属塩と多
孔質耐火性無機酸化物とを湿式粉砕したスラリー等を言
い、それらの前駆体とは、組成物の構成成分を各々に湿
式粉砕又は溶液として用いる場合を言う。The present invention is not limited to the coating liquid, and a catalyst composition or a precursor thereof, or a slurry or solution of the structure of the catalyst composition or a precursor thereof may be used. The slurry of the product refers to a slurry or the like obtained by wet pulverizing a powder in which a precious metal is supported on a porous refractory inorganic oxide, and the slurry of the catalyst composition precursor is a precious metal salt and a porous refractory metal. Wet slurry of a water-soluble inorganic oxide is used, and the precursor thereof is used when the constituent components of the composition are used as wet grinding or as a solution.
【００２５】[0025]
【実施例】実施例１ アルミナを主成分とし、比重1.7 ，粘度７００ｃｐｓの
物性を有するコーティング用スラリーを調製した。この
スラリーを本発明装置のコーティング溶液容器部に1.2
リットル導入し、触媒担体保持部には、直径１０６mm×
長さ１１４mm，４００セル／平方インチ，体積１リット
ルのコージェライト製一体構造型触媒担体（ハニカム
状）を装着した。加減圧容器部に加圧空気1.5kg/cm2 を
導入して触媒担体にスラリーを圧入したところ約２秒で
圧入が完了した。次に上記加減圧容器部を-0.921kg/cm2
に減圧したところ、約２秒でスラリーの吸引が完了し
た。その後すばやくブローを行いコーティングされた触
媒担体を観察したところ、触媒担体のすべてのセルに確
実にスラリーが通過しており、コーティングされていな
いセルは観察されなかった。 Example 1 A coating slurry containing alumina as a main component and having a specific gravity of 1.7 and a viscosity of 700 cps was prepared. 1.2% of this slurry was applied to the coating solution container of the device of the present invention.
Introduce 1 liter, the catalyst carrier holding part has a diameter of 106 mm ×
A cordierite monolithic catalyst carrier (honeycomb) having a length of 114 mm, 400 cells / square inch, and a volume of 1 liter was mounted. When 1.5 kg / cm 2 of pressurized air was introduced into the pressurizing / depressurizing vessel and the slurry was pressed into the catalyst carrier, the press-in was completed in about 2 seconds. Next, pressurize and depressurize the container part to -0.921 kg / cm 2
When the pressure was reduced to 2, the suction of the slurry was completed in about 2 seconds. Then, when the coated catalyst carrier was rapidly blown to observe the coated catalyst carrier, the slurry surely passed through all the cells of the catalyst carrier, and no uncoated cells were observed.
【００２６】比較例１ 実施例で使用したのと同じスラリー2.5 リットルを内径
１５０mmの容器にとり、実施例と同じ触媒担体を用いて
スラリーに沈降させる浸漬法によりコーティングを試み
た。しかし上記スラリーの粘度が高いので触媒担体は、
ほとんどスラリーに沈降せず、触媒担体セル内へのコー
ティングは不可能であった。 Comparative Example 1 Coating was attempted by a dipping method in which 2.5 liters of the same slurry used in the example was placed in a container having an inner diameter of 150 mm, and the same catalyst carrier as in the example was used to settle into the slurry. However, since the viscosity of the slurry is high, the catalyst carrier is
Almost no slurry was settled, and coating in the catalyst carrier cell was impossible.
【００２７】比較例２ 減圧が可能な容器の上部に実施例と同じ触媒担体を装着
し、触媒担体上部に設けたスラリー容器に、実施例で使
用したのと同じスラリー1.2 リットルを導入した。 Comparative Example 2 The same catalyst carrier as that used in the example was mounted on the upper part of a container capable of depressurization, and 1.2 liter of the same slurry as used in the example was introduced into a slurry container provided on the upper part of the catalyst carrier.
【００２８】次に触媒担体下部の容器を-0.921kg/cm2
の減圧とし、スラリーを触媒担体内部に通過させること
により、コーティングを試みた。コーティング後の触媒
担体を実施例と同様に観察したところ、触媒担体下部の
外周部付近にコーティングされていないセルが数多く観
察された。Next, the container below the catalyst carrier was set to -0.921 kg / cm 2.
Coating was attempted by reducing the pressure of and passing the slurry inside the catalyst carrier. When the catalyst carrier after coating was observed in the same manner as in Example, many uncoated cells were observed near the outer periphery of the lower part of the catalyst carrier.
【００２９】比較例３ 内径２００mmの容器に実施例で使用したのと同じスラリ
ー1.2 リットルを採取した。実施例と同じ触媒担体の上
部に、減圧ラインを接続した触媒担体ホルダーに触媒担
体を装着してスラリー容器に沈降させた後、-0.921kg/c
m2 の減圧で触媒担体上部よりスラリーを吸引すること
によって触媒担体内部の下方から上方へにスラリーを通
過させた。コーティング後の触媒担体を観察したとこ
ろ、比較例２と同様にスラリーが完全には通過していな
いセルが数多く観察された。 Comparative Example 3 1.2 liters of the same slurry as used in Example was sampled in a container having an inner diameter of 200 mm. On top of the same catalyst carrier as in the example, after mounting the catalyst carrier on a catalyst carrier holder connected to a decompression line and allowing it to settle in a slurry container, -0.921 kg / c
The slurry was sucked from the upper part of the catalyst carrier at a reduced pressure of m 2 to allow the slurry to pass from the lower part to the upper part inside the catalyst carrier. When the catalyst carrier after coating was observed, many cells in which the slurry did not completely pass were observed as in Comparative Example 2.
【００３０】これら実施例と比較例からも、本発明によ
る装置は、従来の方法と比較して少量のコーティング液
を効率的にしかも担体に均一にコーティングすることが
可能であることが明らかである。From these examples and comparative examples, it is clear that the apparatus according to the present invention can coat a small amount of coating liquid efficiently and evenly on the carrier as compared with the conventional method. ..
【００３１】[0031]
【発明の効果】本発明は以上の様に構成されているの
で、従来の浸漬法では不可能であった物性を有するコー
ティング液でもコーティングすることが可能となり、し
かも従来の空気の圧力により吸引する方法では難しかっ
た、少量のコーティング液を使用する場合におけるコー
ティング層の均一性も得られることとなった。また本発
明に係る装置自体は非常にコンパクトであり、さらに使
用するコーティング液の量も少ないので経済的に優れて
いると共に、コーティングに要する時間も短く効率的で
ある。EFFECTS OF THE INVENTION Since the present invention is constructed as described above, it becomes possible to coat with a coating liquid having physical properties which are not possible by the conventional dipping method, and suction is performed by the conventional air pressure. It was also possible to obtain the uniformity of the coating layer when using a small amount of coating liquid, which was difficult with the method. Further, the apparatus itself according to the present invention is very compact, and since the amount of coating liquid used is small, it is economically superior and the time required for coating is short and efficient.
【図１】本発明に係る装置の代表例を示す概略説明図で
ある。FIG. 1 is a schematic explanatory view showing a typical example of an apparatus according to the present invention.
１ 触媒担体 10 触媒担体保持部 20 コーティング液容器部 30 加減圧容器部 1 catalyst carrier 10 catalyst carrier holding part 20 coating liquid container part 30 pressurizing / depressurizing container part
Claims (4)
その前駆体又は触媒組成物の構造物若しくはその前駆体
のスラリー又は溶液を置き、該スラリー又は溶液を、そ
の下部にある伸縮性膜の変形によって上昇、下降させ、
前記触媒担体を上記スラリー又は溶液に浸漬する工程を
包含することを特徴とする触媒担体に触媒組成物若しく
はその前駆体又は触媒組成物の構造物若しくはその前駆
体をコーティングする方法。1. A slurry or solution of a catalyst composition or a precursor thereof or a structure of a catalyst composition or a precursor thereof is placed below a catalyst carrier, and the slurry or solution is placed under a stretchable film under the slurry. Deformation raises and lowers,
A method of coating a catalyst composition or a precursor thereof or a structure of the catalyst composition or a precursor thereof on the catalyst carrier, which comprises the step of immersing the catalyst carrier in the slurry or solution.
おける加圧、減圧によりなされる請求項１記載の方法。2. The method according to claim 1, wherein the deformation of the stretchable membrane is performed by pressurization and depressurization below the stretchable membrane.
する板を設置し、さらにその下方には底部に伸縮性膜を
有するスラリー又は溶液溜めを接続し、該溜めの底部に
加圧ノズルと減圧ノズルを有する加減圧容器を連結して
なることを特徴とする触媒担体に触媒組成物若しくはそ
の前駆体又は触媒組成物の構造物若しくはその前駆体を
コーティングする装置。3. A plate having a large number of holes is installed below the catalyst carrier holding part, and a slurry or solution reservoir having a stretchable membrane at the bottom is connected below the plate, and a pressure is applied to the bottom of the reservoir. An apparatus for coating a catalyst carrier or a precursor thereof or a structure of the catalyst composition or a precursor thereof on a catalyst carrier, comprising a nozzle and a pressurizing / depressurizing container having a depressurizing nozzle connected to each other.
備え触媒担体を外周側から液密下に保持するものである
請求項３記載の装置。4. The apparatus according to claim 3, wherein the catalyst carrier holding portion is provided with a seal portion on the inner surface side and holds the catalyst carrier liquid-tightly from the outer peripheral side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03273334A JP3077311B2 (en) | 1991-07-06 | 1991-09-24 | Method and apparatus for coating catalyst support with catalyst composition and the like |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19263691 | 1991-07-06 | ||
| JP3-192636 | 1991-07-06 | ||
| JP03273334A JP3077311B2 (en) | 1991-07-06 | 1991-09-24 | Method and apparatus for coating catalyst support with catalyst composition and the like |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0564747A true JPH0564747A (en) | 1993-03-19 |
| JP3077311B2 JP3077311B2 (en) | 2000-08-14 |
Family
ID=26507437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03273334A Expired - Lifetime JP3077311B2 (en) | 1991-07-06 | 1991-09-24 | Method and apparatus for coating catalyst support with catalyst composition and the like |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3077311B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100830624B1 (en) * | 2006-11-24 | 2008-05-19 | 오덱(주) | The bandcoating device of catalysts for automobiles and method thereof |
| JP2008145308A (en) * | 2006-12-12 | 2008-06-26 | Cataler Corp | Method and device for checking slurry, and method for coating slurry |
-
1991
- 1991-09-24 JP JP03273334A patent/JP3077311B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100830624B1 (en) * | 2006-11-24 | 2008-05-19 | 오덱(주) | The bandcoating device of catalysts for automobiles and method thereof |
| JP2008145308A (en) * | 2006-12-12 | 2008-06-26 | Cataler Corp | Method and device for checking slurry, and method for coating slurry |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3077311B2 (en) | 2000-08-14 |
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