JPH0345081B2 - - Google Patents
Info
- Publication number
- JPH0345081B2 JPH0345081B2 JP2934882A JP2934882A JPH0345081B2 JP H0345081 B2 JPH0345081 B2 JP H0345081B2 JP 2934882 A JP2934882 A JP 2934882A JP 2934882 A JP2934882 A JP 2934882A JP H0345081 B2 JPH0345081 B2 JP H0345081B2
- Authority
- JP
- Japan
- Prior art keywords
- dispersion plate
- gas phase
- wall surface
- polymerization
- phase polymerization
- 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
Links
- 239000006185 dispersion Substances 0.000 claims description 32
- 238000006116 polymerization reaction Methods 0.000 claims description 17
- 238000012685 gas phase polymerization Methods 0.000 claims description 14
- 229920000642 polymer Polymers 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 6
- 239000003054 catalyst Substances 0.000 claims description 4
- 239000000178 monomer Substances 0.000 claims 1
- 150000001336 alkenes Chemical class 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
- B01J8/1872—Details of the fluidised bed reactor
Description
【発明の詳細な説明】
この発明は気相重合、とりわけオレフイン類の
気相重合に好適な重合装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a polymerization apparatus suitable for gas phase polymerization, particularly for gas phase polymerization of olefins.
なお、本明細書中で使用される「重合」及び
「重合体」なる用語は、それぞれ「単独重合」並
びに「共重合」及び「単独重合体」並びに「共重
合体」を含む意味で用いられる。 In addition, the terms "polymerization" and "polymer" used in this specification are used to include "homopolymerization", "copolymerization", "homopolymer", and "copolymer", respectively. .
近年オレフイン重合用の遷移金属当りのオレフ
イン重合体生産能力が飛躍的に向上し、その結果
重合後における触媒除去操作が省略されるように
なつた。こうした高活性触媒を用いるときには重
合後の操作が最も簡単なところから、一般にはオ
レフイン重合を気相で行う方法が採用されてい
る。 In recent years, the production capacity of olefin polymers per transition metal for olefin polymerization has improved dramatically, and as a result, the catalyst removal operation after polymerization has become unnecessary. When such highly active catalysts are used, a method is generally adopted in which olefin polymerization is carried out in the gas phase, since it is the simplest to operate after polymerization.
第１図に示すものは、これらの方法のうちの代
表的なものの一つで、気相重合槽１内には下側部
の分散板２が設けてあり、管３より供給されたオ
レフイン、場合によつては希釈剤、分子量調節剤
などを混入したオレフイン含有ガスが分散板２よ
り均一に分散されて上昇し、分散板上において、
生成したオレフイン重合体粒子と管４より導入さ
れた触媒粒子とからなる固体粒子を流動槽内で浮
遊流動させつゝ重合を行うようになつている。 The method shown in FIG. 1 is one of the typical methods, in which a gas phase polymerization tank 1 is provided with a lower dispersion plate 2, and the olefin, supplied through a pipe 3, is In some cases, the olefin-containing gas mixed with a diluent, a molecular weight regulator, etc. is uniformly dispersed from the dispersion plate 2 and rises, and on the dispersion plate,
Solid particles consisting of the produced olefin polymer particles and the catalyst particles introduced through the tube 4 are suspended and fluidized in a fluidized tank to carry out polymerization.
ところが従来のこうした装置では、気相重合槽
１の壁面下部に重合体の塊物が生成される傾向が
あつた。目視による観察によれば、上記流動層は
壁面下部では粉末重合体が気泡５の上昇に伴つて
上昇しようとしているのに対し壁面上部では下降
する動きを行つているが、壁面下部での粉末重合
体の動きはことに悪く、これが該付近での塊物生
成の原因と推定される。 However, in such a conventional apparatus, there was a tendency for polymer lumps to be produced at the lower part of the wall surface of the gas phase polymerization tank 1. According to visual observation, the powder polymer at the lower part of the wall of the fluidized bed is about to rise as the bubbles 5 rise, while at the upper part of the wall it is moving downward; The movement of coalescence is particularly bad, and this is presumed to be the cause of the formation of lumps in the vicinity.
本発明は壁面下部にダミーを入れて隅を傾斜面
若しくは彎曲面にし、これによつて壁面下部での
粉末重合体の動きを良好にして塊物の生成を解消
したもので、これを図面によつて説明すると、第
２図に示す如く、分散板２と分散板上の重合槽１
内壁面とで形成される隅部にダミー７を入れ、分
散板上の壁面下部を傾斜若くは彎曲させたもので
ある。ダミー７は金属、樹脂、木製等で、図示す
る如く斜辺が直線若くは彎曲する断面略直角三角
形に形成されるか或いは内部が平担若くは彎曲す
る断面略台形の板体よりなり、隅部に単に充填或
いは嵌合載置されるか若くは止具による止着また
は接着、溶着等により固着される。 In the present invention, a dummy is placed at the bottom of the wall to make the corner a sloped or curved surface, thereby improving the movement of the powder polymer at the bottom of the wall and eliminating the formation of lumps. To explain this, as shown in FIG. 2, a dispersion plate 2 and a polymerization tank 1 on the dispersion plate
A dummy 7 is inserted into the corner formed by the inner wall surface, and the lower part of the wall surface above the dispersion plate is sloped or curved. The dummy 7 is made of metal, resin, wood, etc., and is formed into a substantially right triangular cross section with a straight or curved hypotenuse as shown in the figure, or a plate with a substantially trapezoidal cross section with a flat or curved interior, and the corner The material may be simply filled or fitted, or may be fixed with a fastener, adhesive, welding, or the like.
なお、分散板としては、例えば多孔板、カサ付
多孔板、スリツト型など種々のタイプのものが使
用できる。 Note that various types of dispersion plates can be used, such as a perforated plate, a perforated plate with a cover, and a slit type.
上記は重合槽内壁面と分散板との間の隅部にダ
ミーを入れることにより分散板上の壁面下部を傾
斜若くは彎曲させたものであるが、分散板状の壁
面下部にダミーを一体形成してもまた重合槽壁面
を分散板に向つて絞り、上記と同様の形状にして
もよい。後者の場合、分散板下の重合槽断面は好
ましくは分散板上の絞りきつた断面と同形同大に
形成される。 In the above example, a dummy is placed in the corner between the inner wall of the polymerization tank and the dispersion plate to make the lower part of the wall above the dispersion plate inclined or curved, but the dummy is integrally formed at the lower part of the dispersion plate-shaped wall. Alternatively, the wall surface of the polymerization tank may be narrowed toward the dispersion plate to form the same shape as above. In the latter case, the cross section of the polymerization tank under the dispersion plate is preferably formed to have the same shape and size as the narrow cross section on the dispersion plate.
しかして目視による観察によれば、壁面下部ま
で下降流が発生し、壁面下部での粉末重合体の動
きもとてもよくなることが確認され、塊物の生成
は認められなかつた。第２図にそのフローパター
ンを示す。実験によれば、壁面下部での粉末重合
体の動きを良好にし、塊物生成を阻害するには分
散板上の壁面下部の形状はその下端と非傾斜部で
ある上部壁面までの距離（分散板まで延長させた
上部壁面までの距離）Ｂが分散板２のガス出口２
ａの１〜30倍であつて分散板径の1/8以下程度、
内面下端と分散板とのなす角αが30〜85°の範囲
が望ましいことが判明した（第３図）。 However, visual observation confirmed that a downward flow was generated to the lower part of the wall surface, and that the movement of the powder polymer at the lower part of the wall surface was very good, and no lumps were observed. Figure 2 shows the flow pattern. According to experiments, in order to improve the movement of the powder polymer at the lower part of the wall and inhibit the formation of agglomerates, the shape of the lower part of the wall on the dispersion plate is determined by the distance between its lower end and the upper wall, which is a non-sloped part (dispersion Distance to the upper wall surface extended to the plate) B is the gas outlet 2 of the dispersion plate 2
1 to 30 times a and about 1/8 or less of the diameter of the dispersion plate,
It has been found that the angle α between the lower end of the inner surface and the dispersion plate is preferably in the range of 30 to 85 degrees (Figure 3).
なお、ガス出口が円形でない場合のガス出口径
は、同一出口面積を有する円形出口の径をいう。 Note that when the gas outlet is not circular, the gas outlet diameter refers to the diameter of a circular outlet having the same outlet area.
以下のように本発明の気相重合装置によれば壁
面下での粉末重合体の動きがよく塊物の生成を生
じない。しかもこのことが分散板上の壁面下部を
単に傾斜若くは彎曲させるのみで既存の気相重合
槽の基本的構造をほとんど変えることなく簡易に
行われる。 As described below, according to the gas phase polymerization apparatus of the present invention, the powder polymer moves well under the wall surface and does not generate lumps. Furthermore, this can be easily accomplished without changing the basic structure of the existing gas phase polymerization tank by simply sloping or curving the lower part of the wall surface above the dispersion plate.
第１図は気相重合装置の要部概略図、第２図は
本発明に係る同装置の要部概略図、第３図は第２
図の一部拡大断面図である。
１……気相重合槽、２……分散板、３……管、
４……管、５……気泡。
FIG. 1 is a schematic diagram of the main parts of a gas phase polymerization apparatus, FIG. 2 is a schematic diagram of the main parts of the same apparatus according to the present invention, and FIG.
It is a partially enlarged sectional view of the figure. 1... Gas phase polymerization tank, 2... Dispersion plate, 3... Tube,
4...tube, 5...bubble.
Claims (1)
有し、分散板より分散して上昇するガス状の単量
体が分散板上の重合体粒子と触媒粒子からなる固
定粒子を流動層内で浮遊流動させつゝ重合を行う
気相重合装置において、分散板上の重合槽内壁面
下部を分散板に向つて傾斜若くは彎曲させたこと
を特徴とする気相重合装置。 ２ 分散板上の重合槽内壁面と分散板との間の隅
部に内壁面を傾斜若くは彎曲させるダミー７が装
着される特許請求の範囲第１項記載の気相重合装
置。 ３ ダミーは重合槽壁面と一体形成される特許請
求の範囲第２項記載の気相重合装置。 ４ 分散板上の重合槽壁面下部は分散板に向つて
絞られる特許請求の範囲第１項記載の気相重合装
置。 ５ 分散板上の内壁面下部は、その下端と重合槽
上部内壁面までの距離Ｂが分散板２のガス出口径
２ａの１〜30倍、上記内面下端と分散板とのなす
角αが30〜85°に形成される特許請求の範囲第１
項記載の気相重合装置。[Claims] 1. It has a gas phase heavy tank 1 with a dispersion plate 2 provided in the lower part of the inside, and the gaseous monomer that is dispersed and rises from the dispersion plate is mixed with the polymer particles on the dispersion plate. A gas phase polymerization apparatus in which fixed particles of catalyst particles are suspended and fluidized in a fluidized bed for polymerization, characterized in that the lower part of the inner wall surface of the polymerization tank above the dispersion plate is inclined or curved toward the dispersion plate. Gas phase polymerization equipment. 2. The gas phase polymerization apparatus according to claim 1, wherein a dummy 7 for making the inner wall surface inclined or curved is attached to a corner between the inner wall surface of the polymerization tank on the dispersion plate and the dispersion plate. 3. The gas phase polymerization apparatus according to claim 2, wherein the dummy is integrally formed with the wall surface of the polymerization tank. 4. The gas phase polymerization apparatus according to claim 1, wherein the lower part of the wall surface of the polymerization tank above the dispersion plate is narrowed toward the dispersion plate. 5 The distance B between the lower end of the lower inner wall surface on the dispersion plate and the upper inner wall surface of the polymerization tank is 1 to 30 times the gas outlet diameter 2a of the dispersion plate 2, and the angle α between the lower end of the inner surface and the dispersion plate is 30 Claim 1 formed at ~85°
Gas phase polymerization apparatus described in Section 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2934882A JPS58145702A (en) | 1982-02-24 | 1982-02-24 | Vapor-phase polymerization apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2934882A JPS58145702A (en) | 1982-02-24 | 1982-02-24 | Vapor-phase polymerization apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58145702A JPS58145702A (en) | 1983-08-30 |
| JPH0345081B2 true JPH0345081B2 (en) | 1991-07-10 |
Family
ID=12273714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2934882A Granted JPS58145702A (en) | 1982-02-24 | 1982-02-24 | Vapor-phase polymerization apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58145702A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101360936B (en) * | 2006-01-31 | 2010-10-13 | 住友重机械过程机器株式会社 | Wavelet piece for pressure container |
-
1982
- 1982-02-24 JP JP2934882A patent/JPS58145702A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58145702A (en) | 1983-08-30 |
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