JP2000095894A - Treatment of waste plastic - Google Patents
Treatment of waste plasticInfo
- Publication number
- JP2000095894A JP2000095894A JP26710198A JP26710198A JP2000095894A JP 2000095894 A JP2000095894 A JP 2000095894A JP 26710198 A JP26710198 A JP 26710198A JP 26710198 A JP26710198 A JP 26710198A JP 2000095894 A JP2000095894 A JP 2000095894A
- Authority
- JP
- Japan
- Prior art keywords
- catalyst
- gallium
- waste plastics
- waste plastic
- plastic
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Landscapes
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、都市ゴミ等の廃棄
物に含まれるポリエチレン、ポリプロピレン等の廃プラ
スチックを処理し、プラスチック原料等の化学原料とし
て使用可能な処理物を得る方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating waste plastic such as polyethylene and polypropylene contained in waste such as municipal waste to obtain a treated material usable as a chemical raw material such as a plastic raw material.
【０００２】[0002]
【従来の技術】従来、都市ゴミ等の廃棄物に含まれるポ
リエチレン、ポリプロピレン等のポリオレフィン系等の
廃プラスチックを再利用する試みとしては、廃プラスチ
ックを加熱処理により熱分解させ、プラスチック原料等
の化学原料として使用可能な処理物を得るものがある。
廃プラスチックから上記化学原料を得る方法としては、
廃プラスチックの単純熱分解によるものや、廃プラスチ
ックを、鉄や白金を担持した活性炭触媒等の触媒の存在
下で加熱処理し、化学原料として有用な芳香族炭化水素
を回収するものがある。2. Description of the Related Art Conventionally, as an attempt to reuse waste plastic such as polyolefins such as polyethylene and polypropylene contained in waste such as municipal garbage, the waste plastic is thermally decomposed by heat treatment, and chemicals such as plastic raw materials are used. Some obtain a treated product that can be used as a raw material.
As a method of obtaining the above chemical raw materials from waste plastics,
There are ones obtained by simple pyrolysis of waste plastics and those obtained by subjecting waste plastics to heat treatment in the presence of a catalyst such as an activated carbon catalyst carrying iron or platinum to recover aromatic hydrocarbons useful as chemical raw materials.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記従
来技術にあっては、高温（例えば７００℃以上）の加熱
処理が必要であるため加熱コストが嵩み、しかも目的と
する炭化水素の収率が例えば２０〜４０％程度と低い問
題があった。本発明は、上記事情に鑑みてなされたもの
で、化学原料等として有用な処理物を高収率かつ低コス
トで得ることができる廃プラスチックの処理方法を提供
することを目的とする。However, in the above-mentioned prior art, a heating treatment at a high temperature (for example, 700 ° C. or more) is required, so that the heating cost is increased and the yield of the target hydrocarbon is reduced. For example, there is a problem as low as about 20 to 40%. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method for treating waste plastic, which can provide a useful product as a chemical raw material or the like at a high yield and at low cost.
【０００４】[0004]
【課題を解決するための手段】上記課題は、溶融した廃
プラスチックを、ガリウム含有珪酸塩触媒の存在下で加
熱分解させ、得られた生成物を回収することによって解
決することができる。The above object can be attained by subjecting molten waste plastic to thermal decomposition in the presence of a gallium-containing silicate catalyst and recovering the resulting product.
【０００５】[0005]
【発明の実施の形態】図１は、本発明の廃プラスチック
処理方法の一実施形態を実施するために好適に用いられ
る廃プラスチック処理装置を示すもので、ここに示す処
理装置は、廃プラスチックを溶融させる溶融槽１と、溶
融槽１から供給された廃プラスチック溶融物を熱分解さ
せる反応炉２と、反応炉２内において生成した熱分解生
成物を回収するトラップ３から概略構成されている。溶
融槽１および反応炉２は、これらの内部を加熱するヒー
タ４、５を備えている。また、溶融槽１および反応炉２
には、これらの内部にヘリウムガスなどの不活性ガスを
導入する導入管６、７が接続されている。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a waste plastic processing apparatus suitably used for carrying out one embodiment of the waste plastic processing method of the present invention. It comprises a melting tank 1 for melting, a reaction furnace 2 for thermally decomposing a waste plastic melt supplied from the melting tank 1, and a trap 3 for collecting a pyrolysis product generated in the reaction furnace 2. The melting tank 1 and the reaction furnace 2 are provided with heaters 4 and 5 for heating the inside thereof. Further, a melting tank 1 and a reaction furnace 2
Are connected to introduction pipes 6 and 7 for introducing an inert gas such as helium gas into these.
【０００６】反応炉２は、ガリウム含有珪酸塩触媒を充
填した触媒層８を備えたものとされている。この触媒と
しては、ガリウム珪酸塩（ガロ珪酸塩、例えばｘＭI 2Ｏ
・ｙＧａ2Ｏ3・ｚＳｉＯ2・ｎＨ2Ｏ（Ｍ：Ｎａ、Ｋ等）
をイオン交換によりプロトン型にしたもの）のほか、Ｇ
ａ−ＨＺＳＭ−５等を用いることができる。この触媒
は、ガリウム含有珪酸塩を、平均粒径が例えば０．２〜
５ｍｍの粒状に成形したものとするのが好ましい。The reactor 2 is provided with a catalyst layer 8 filled with a gallium-containing silicate catalyst. The catalyst includes gallium silicate (gallosilicate, for example, xM I 2 O
・ YGa 2 O 3 .zSiO 2 .nH 2 O (M: Na, K, etc.)
Into a proton form by ion exchange), and G
a-HZSM-5 or the like can be used. This catalyst has a gallium-containing silicate having an average particle size of, for example, 0.2 to
It is preferable that the material is formed into a particle of 5 mm.
【０００７】トラップ３は、反応炉２内の熱分解生成物
を導く管路９と、この管路９内を冷却する液体窒素など
の冷媒を貯留する冷媒槽１０を備え、この冷媒によって
管路９内の生成物を冷却し凝結または凝固させることが
できるようになっている。The trap 3 has a pipe 9 for guiding a thermal decomposition product in the reaction furnace 2 and a refrigerant tank 10 for storing a refrigerant such as liquid nitrogen for cooling the pipe 9. The product in 9 can be cooled and allowed to set or solidify.
【０００８】以下、上記処理装置を用いた場合を例とし
て、本発明の廃プラスチック処理方法の一実施形態を説
明する。本発明の廃プラスチック処理方法の対象となる
廃棄物としては、都市ごみ、産業廃棄物等に由来する廃
プラスチック、例えばポリエチレン、ポリプロピレン等
のポリオレフィン系プラスチックを主成分とするものを
挙げることができる。Hereinafter, an embodiment of the method for treating waste plastic of the present invention will be described with reference to an example in which the above-described processing apparatus is used. Examples of the waste to be treated by the waste plastic treatment method of the present invention include waste plastics derived from municipal solid waste and industrial wastes, for example, those mainly composed of polyolefin-based plastics such as polyethylene and polypropylene.
【０００９】本実施形態の処理方法では、まず、適度の
粒径に粉砕した廃プラスチックを溶融槽１内に収容し、
この廃プラスチックをヒータ４を用いて好ましくは２０
０〜３５０℃に加熱し、溶融させる。この際、予めヘリ
ウムガスなどの不活性ガスを導入管６を通して溶融槽１
内に導入しておき、不活性ガス雰囲気下で上記廃プラス
チックを溶融させるのが好ましい。In the processing method of this embodiment, first, waste plastic crushed to an appropriate particle size is accommodated in the melting tank 1,
This waste plastic is preferably removed using a heater 4 for 20 minutes.
Heat to 0-350 ° C and melt. At this time, an inert gas such as helium gas is previously introduced through the introduction pipe 6 to the melting tank 1.
Preferably, the waste plastic is melted in an inert gas atmosphere.
【００１０】次いで、溶融槽１内にさらに不活性ガスを
導入し槽内の圧力を高め、溶融プラスチックを管路１０
を通して徐々に反応炉２内に押し出し、触媒層８内のガ
リウム含有珪酸塩触媒に接触させる。溶融プラスチック
を反応炉２内に供給する速度は、３〜１５ｇプラスチッ
ク／ｇ触媒・ｈｒとする、すなわちＴｉｍｅ Ｆａｃｔ
ｏｒ（＝Ｗ／Ｆ、Ｗ：触媒量、Ｆ：プラスチック供給速
度）が４〜２０ｇ触媒・ｍｉｎ／ｇプラスチックとなる
ように設定するのが好ましい。Next, an inert gas is further introduced into the melting tank 1 to increase the pressure in the tank, and the molten plastic is introduced into a pipe 10.
And gradually extruded into the reaction furnace 2 and brought into contact with the gallium-containing silicate catalyst in the catalyst layer 8. The rate at which the molten plastic is fed into the reaction furnace 2 is 3 to 15 g plastic / g catalyst · hr, that is, Time Fact.
or (= W / F, W: catalyst amount, F: plastic supply rate) is preferably set to 4 to 20 g catalyst · min / g plastic.
【００１１】溶融プラスチックを上記触媒に接触させる
際には、ヒータ５を用いて反応炉２内の溶融プラスチッ
クを好ましくは３７５〜５５０℃、さらに好ましくは５
００〜５５０℃となるよう加熱する。この温度が３７５
℃未満であると、廃プラスチックの熱分解が不十分とな
り後述する反応生成物中の芳香族炭化水素含有率が低下
し、５５０℃を越えると廃プラスチックの熱分解が過剰
となり反応生成物中の芳香族炭化水素含有率が低下する
ため好ましくない。また、反応炉２内には、予めヘリウ
ムガスなどの不活性ガスを導入管７を通して反応炉２内
に導入しておき、反応炉２内を不活性ガス雰囲気として
おくのが好ましい。When the molten plastic is brought into contact with the catalyst, the molten plastic in the reaction furnace 2 is preferably heated to 375 to 550 ° C.,
Heat to 00-550 ° C. This temperature is 375
When the temperature is lower than ℃, the thermal decomposition of the waste plastic becomes insufficient and the content of aromatic hydrocarbons in the reaction product described below decreases. When the temperature exceeds 550 ° C, the thermal decomposition of the waste plastic becomes excessive and the It is not preferable because the aromatic hydrocarbon content is reduced. Further, it is preferable that an inert gas such as helium gas is previously introduced into the reaction furnace 2 through the introduction pipe 7 into the reaction furnace 2 so that the inside of the reaction furnace 2 is kept in an inert gas atmosphere.
【００１２】この加熱処理により、反応炉２内の溶融プ
ラスチックの一部はガリウム含有珪酸塩触媒の存在下で
熱分解により低分子化するとともに環化し、プラスチッ
ク原料等の化学原料として有用なベンゼン、トルエン、
キシレン等の芳香族炭化水素を主成分とする生成物が得
られる。By this heat treatment, a part of the molten plastic in the reaction furnace 2 is decomposed and decyclized by thermal decomposition in the presence of a gallium-containing silicate catalyst, and benzene useful as a chemical raw material such as a plastic raw material. toluene,
A product mainly containing an aromatic hydrocarbon such as xylene is obtained.
【００１３】次いで、反応炉２内で生成した芳香族炭化
水素を主成分とする生成物を管路９を通してトラップ３
に導入し、この生成物を管路９内で冷却し凝結または凝
固させ、これを回収する。上記廃プラスチックからの芳
香族炭化水素の回収率は、通常７０重量％以上となる。Next, a product mainly composed of aromatic hydrocarbons generated in the reactor 2 is trapped through a pipe 9 through a trap 3.
The product is cooled in line 9 to condense or solidify and is recovered. The recovery rate of aromatic hydrocarbons from the waste plastic is usually 70% by weight or more.
【００１４】上記廃プラスチック処理方法にあっては、
廃プラスチック溶融物をガリウム含有珪酸塩触媒の存在
下で熱分解させるので、プラスチック原料等の化学原料
として有用なベンゼン、トルエン、キシレン等の芳香族
炭化水素を高い収率で回収することができる。ガリウム
含有珪酸塩触媒を用いることによって上記芳香族炭化水
素を高収率で回収することができるのは、ガリウム含有
珪酸塩触媒が持つプラスチック分解能と分解物環化能と
の比率が、上記廃プラスチックを芳香族炭化水素に変化
させるために適したものであるためであると考えられ
る。また、従来の廃プラスチック処理方法に比べ低温で
の処理が可能となるため、加熱コスト低減を図ることが
できる。[0014] In the above waste plastic treatment method,
Since the waste plastic melt is thermally decomposed in the presence of the gallium-containing silicate catalyst, aromatic hydrocarbons such as benzene, toluene, and xylene useful as chemical raw materials such as plastic raw materials can be recovered in high yield. By using a gallium-containing silicate catalyst, the aromatic hydrocarbon can be recovered in high yield because the ratio between the plastic decomposability and the cyclization ability of the gallium-containing silicate catalyst is higher than that of the waste plastic. It is considered that this is because it is suitable for converting into an aromatic hydrocarbon. Further, since the processing at a lower temperature can be performed as compared with the conventional waste plastic processing method, the heating cost can be reduced.
【００１５】[0015]
【実施例】以下、具体例を示して本発明の効果を明確化
する。 （実施例）以下に示す実施例では、図１に示す処理装置
を用いた。触媒層８に充填するガリウム含有珪酸塩触媒
としては、プロトン型ガリウム珪酸塩を平均粒径０．８
ｍｍの粒状に成形したものを用いた。EXAMPLES The effects of the present invention will be clarified by showing specific examples. (Embodiment) In the embodiment described below, the processing apparatus shown in FIG. 1 was used. As the gallium-containing silicate catalyst to be filled in the catalyst layer 8, a proton-type gallium silicate has an average particle diameter of 0.8.
What was formed into the granular shape of mm was used.
【００１６】ポリエチレンからなる廃プラスチックを、
図１に示す処理装置の溶融槽１内においてヘリウムガス
雰囲気下で２７０℃に加熱し溶融させた。次いで、溶融
槽１内の廃プラスチックを、反応炉２内の触媒層８に供
給し、ヘリウムガス雰囲気下で上記触媒に接触させた。
この際、上記Ｔｉｍｅ Ｆａｃｔｏｒは９．９ｇ触媒・
ｍｉｎ／ｇプラスチックとし、反応炉２内の温度は５２
５℃とした。次いで、得られた反応生成物を液体窒素を
用いたトラップ３に導き、ここで凝結または凝固した生
成物を回収した。The waste plastic made of polyethylene is
Heating was performed at 270 ° C. in a helium gas atmosphere in the melting tank 1 of the processing apparatus shown in FIG. Next, the waste plastic in the melting tank 1 was supplied to the catalyst layer 8 in the reaction furnace 2 and brought into contact with the catalyst under a helium gas atmosphere.
At this time, the time factor was 9.9 g catalyst.
min / g plastic, and the temperature in the reactor 2 is 52
5 ° C. Next, the obtained reaction product was guided to a trap 3 using liquid nitrogen, where the coagulated or coagulated product was recovered.
【００１７】（比較例１〜３）触媒層８に充填する触媒
として、ガリウム含有珪酸塩触媒に代えて、ゼオライト
系触媒（ＮＥケムキャット社製、Ｈ−ＺＳＭ−５）、シ
リカ・アルミナ系触媒（日揮化学社製、ＳＡ）、鉄担持
活性炭（Ｆｅ／Ｃ）を用い、上記実施例で用いたものと
同様の廃プラスチックを処理した。この際、Ｔｉｍｅ
Ｆａｃｔｏｒは、それぞれ１２．２、１０．９、１５．
４ｇ触媒・ｍｉｎ／ｇプラスチックとし、反応炉２内の
温度はいずれも５２５℃とした。(Comparative Examples 1 to 3) As the catalyst to be filled in the catalyst layer 8, instead of the gallium-containing silicate catalyst, a zeolite-based catalyst (manufactured by NE Chemcat, H-ZSM-5), a silica-alumina-based catalyst ( Waste plastic similar to that used in the above example was treated using activated carbon (Fe / C) manufactured by JGC Chemicals Co., Ltd. and iron. At this time, Time
Factors are 12.2, 10.9, 15.
4 g catalyst / min / g plastic was used, and the temperature inside the reactor 2 was 525 ° C.
【００１８】上記実施例および比較例１〜３において回
収された生成物の成分分析結果を表１、２に示す。表１
には、回収物全体の成分分析結果を示し、表２には室温
下で液状となる炭素数５以上の生成物の成分分析結果を
示す。また、図２は、上記実施例および比較例１〜３の
それぞれについて、炭素数５以上の化合物の回収率、芳
香族炭化水素の回収率、ベンゼン、トルエン、およびキ
シレンを合わせた回収率をグラフ化したものである。な
お、図中、ＢＴＸとはベンゼン、トルエン、およびキシ
レンを指す。なお、表中、Ｃ１ないしＣ１４とは炭素数
が各々１ないし１４である化合物を指す。またＣ５〜、
Ｃ１４〜とは炭素数が各々５以上、１４以上である化合
物を指す。Tables 1 and 2 show the results of component analysis of the products recovered in the above Examples and Comparative Examples 1 to 3. Table 1
Shows the results of component analysis of the entire recovered product, and Table 2 shows the results of component analysis of products having 5 or more carbon atoms which become liquid at room temperature. FIG. 2 is a graph showing the recoveries of compounds having 5 or more carbon atoms, the recoveries of aromatic hydrocarbons, and the recoveries of benzene, toluene, and xylene for each of the above Examples and Comparative Examples 1 to 3. It is a thing. In the figures, BTX refers to benzene, toluene, and xylene. In the table, C1 to C14 indicate compounds each having 1 to 14 carbon atoms. Also C5,
C14- refers to compounds having 5 or more and 14 or more carbon atoms, respectively.
【００１９】[0019]
【表１】 [Table 1]
【００２０】[0020]
【表２】 [Table 2]
【００２１】表１、２、および図２より、ガリウム含有
珪酸塩触媒を用いることによって、ベンゼン、トルエ
ン、キシレン等の芳香族炭化水素を高い収率で回収する
ことができたことがわかる。Tables 1 and 2 and FIG. 2 show that the use of the gallium-containing silicate catalyst enabled the recovery of aromatic hydrocarbons such as benzene, toluene and xylene in high yield.
【００２２】[0022]
【発明の効果】以上説明したように、本発明の廃プラス
チック処理方法にあっては、廃プラスチックを、ガリウ
ム含有珪酸塩触媒の存在下で熱分解させるので、プラス
チック原料等の化学原料として有用なベンゼン、トルエ
ン、キシレン等の芳香族炭化水素を高収率かつ低コスト
で回収することができる。As described above, in the method for treating waste plastic of the present invention, waste plastic is thermally decomposed in the presence of a gallium-containing silicate catalyst, so that it is useful as a chemical raw material such as a plastic raw material. Aromatic hydrocarbons such as benzene, toluene and xylene can be recovered at high yield and at low cost.
【図１】 本発明の廃プラスチック処理方法の一実施形
態を実施するのに好適に用いられる処理装置を示す概略
構成図である。FIG. 1 is a schematic configuration diagram showing a processing apparatus suitably used for carrying out an embodiment of a waste plastic processing method of the present invention.
【図２】 試験結果を示すグラフである。FIG. 2 is a graph showing test results.
１・・・溶融槽、２・・・反応炉、８・・・触媒層 DESCRIPTION OF SYMBOLS 1 ... Melting tank, 2 ... Reactor, 8 ... Catalyst layer
───────────────────────────────────────────────────── フロントページの続き (72)発明者 伊東 正皓 神奈川県横浜市磯子区新中原町１番地 石 川島播磨重工業株式会社技術研究所内 Ｆターム(参考） 4F301 AA12 AB02 AC11 AD02 BA01 BA21 BF20 CA09 CA23 CA26 CA41 CA53 CA72 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Masahiro Ito 1 Shin-Nakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Ishikawashima Harima Heavy Industries, Ltd. F-term (reference) 4F301 AA12 AB02 AC11 AD02 BA01 BA21 BF20 CA09 CA23 CA26 CA41 CA53 CA72
Claims (1)
有珪酸塩触媒の存在下で加熱分解させ、得られた生成物
を回収することを特徴とする廃プラスチック処理方法。1. A method for treating waste plastics, comprising: decomposing a molten waste plastic by heating in the presence of a gallium-containing silicate catalyst; and collecting an obtained product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26710198A JP4103198B2 (en) | 1998-09-21 | 1998-09-21 | Waste plastic processing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26710198A JP4103198B2 (en) | 1998-09-21 | 1998-09-21 | Waste plastic processing equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000095894A true JP2000095894A (en) | 2000-04-04 |
| JP4103198B2 JP4103198B2 (en) | 2008-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26710198A Expired - Lifetime JP4103198B2 (en) | 1998-09-21 | 1998-09-21 | Waste plastic processing equipment |
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| Country | Link |
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| JP (1) | JP4103198B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011031320A3 (en) * | 2009-09-09 | 2011-09-29 | University Of Massachusetts | Systems and processes for catalytic pyrolysis of biomass and hydrocarbonaceous materials for production of aromatics with optional olefin recycle, and catalysts having selected particle size for catalytic pyrolysis |
| US8895790B2 (en) | 2013-02-12 | 2014-11-25 | Saudi Basic Industries Corporation | Conversion of plastics to olefin and aromatic products |
| US9428695B2 (en) | 2013-02-12 | 2016-08-30 | Saudi Basic Industries Corporation | Conversion of plastics to olefin and aromatic products with product recycle |
| US9447332B2 (en) | 2013-02-12 | 2016-09-20 | Saudi Basic Industries Corporation | Conversion of plastics to olefin and aromatic products using temperature control |
-
1998
- 1998-09-21 JP JP26710198A patent/JP4103198B2/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011031320A3 (en) * | 2009-09-09 | 2011-09-29 | University Of Massachusetts | Systems and processes for catalytic pyrolysis of biomass and hydrocarbonaceous materials for production of aromatics with optional olefin recycle, and catalysts having selected particle size for catalytic pyrolysis |
| JP2013504651A (en) * | 2009-09-09 | 2013-02-07 | ユニバーシティ オブ マサチューセッツ | Systems and processes for catalytic pyrolysis of biomass and hydrocarbon feedstocks for the production of aromatics with optional olefin recycle, and catalysts having selected particle sizes for catalytic pyrolysis |
| US9169442B2 (en) | 2009-09-09 | 2015-10-27 | University Of Massachusetts | Systems and processes for catalytic pyrolysis of biomass and hydrocarbonaceous materials for production of aromatics with optional olefin recycle, and catalysts having selected particle size for catalytic pyrolysis |
| US9453166B2 (en) | 2009-09-09 | 2016-09-27 | University Of Massachusetts | Systems and processes for catalytic pyrolysis of biomass and hydrocarbonaceous materials for production of aromatics with optional olefin recycle, and catalysts having selected particle size for catalytic pyrolysis |
| US8895790B2 (en) | 2013-02-12 | 2014-11-25 | Saudi Basic Industries Corporation | Conversion of plastics to olefin and aromatic products |
| US9212318B2 (en) | 2013-02-12 | 2015-12-15 | Saudi Basic Industries Corporation | Catalyst for the conversion of plastics to olefin and aromatic products |
| US9428695B2 (en) | 2013-02-12 | 2016-08-30 | Saudi Basic Industries Corporation | Conversion of plastics to olefin and aromatic products with product recycle |
| US9447332B2 (en) | 2013-02-12 | 2016-09-20 | Saudi Basic Industries Corporation | Conversion of plastics to olefin and aromatic products using temperature control |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4103198B2 (en) | 2008-06-18 |
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