JPH05306240A - Production of isobutane - Google Patents

Production of isobutane

Info

Publication number
JPH05306240A
JPH05306240A JP4129809A JP12980992A JPH05306240A JP H05306240 A JPH05306240 A JP H05306240A JP 4129809 A JP4129809 A JP 4129809A JP 12980992 A JP12980992 A JP 12980992A JP H05306240 A JPH05306240 A JP H05306240A
Authority
JP
Japan
Prior art keywords
heteropolyacid
catalyst
platinum
acid
potassium
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.)
Pending
Application number
JP4129809A
Other languages
Japanese (ja)
Inventor
Yoshihiko Mori
嘉彦 森
Hiroyoshi Noro
弘喜 野呂
Takao Kato
喬雄 加藤
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.)
Tosoh Corp
Original Assignee
Tosoh Corp
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 Tosoh Corp filed Critical Tosoh Corp
Priority to JP4129809A priority Critical patent/JPH05306240A/en
Publication of JPH05306240A publication Critical patent/JPH05306240A/en
Pending legal-status Critical Current

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/50Improvements relating to the production of bulk chemicals
    • Y02P20/52Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts

Landscapes

  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Abstract

PURPOSE:To solve problems of corrosion of apparatus or complicatedness of process and simultaneously suppress formation of by-product, especially coke and improve activity of catalyst using a specific catalyst when isobutane is produced by isomerizing n-butane. CONSTITUTION:n-Butane is isomerized in the presence of a noble metal- heteropolyacid catalyst consisting of an heteropolyacid salt containing potassium as a metal ion and platinum or palladium, preferably at 20-350 deg.C under 1-50kg/ cm<2>G pressure to advantageously provide isobutane industrially useful as an alkylating agent. Furthermore, the catalyst can be prepared by mixing, e.g. platinum or a palladium precursor with a heteropolyacid and a potassium compound and then burning the mixture or mixing platinum or the palladium precursor containing potassium with a heteropolyacid and then burning the mixture. The burning temperature is 250-500 deg.C, preferably 300-400 deg.C.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、n−ブタンを異性化し
てイソブタンを製造する方法に関する。
FIELD OF THE INVENTION The present invention relates to a method for producing isobutane by isomerizing n-butane.

【0002】イソブタンはアルキル化剤として工業的に
重要であり、脱水素することにより製造されるイソブテ
ンは石油化学工業において貴重な原材料であり、イソブ
テンを出発原料として用いる多くの工業的方法が開発さ
れている。
Isobutane is industrially important as an alkylating agent, and isobutene produced by dehydrogenation is a valuable raw material in the petrochemical industry, and many industrial methods using isobutene as a starting material have been developed. ing.

【0003】[0003]

【従来の技術】異性化反応において触媒は塩化アルミニ
ウム、臭化アルミニウムなどのフリーデルクラフト型金
属ハロゲン化物触媒を無水の塩化水素あるいは臭化水素
とともに用いるもの、水添機能を有する金属成分、例え
ばニッケル、白金、パラジウムなどをアルミナあるいは
ゼオライトなどの耐熱性酸化物上に担持したいわゆる二
元機能触媒、白金−アルミナ−ハロゲン化物の複合触媒
に大別できる。
In the isomerization reaction, the catalyst used is a Friedel-Crafts type metal halide catalyst such as aluminum chloride or aluminum bromide with anhydrous hydrogen chloride or hydrogen bromide, or a metal component having a hydrogenating function, such as nickel. , A platinum-alumina-halide composite catalyst, a so-called bifunctional catalyst in which platinum, palladium, etc. are supported on a heat-resistant oxide such as alumina or zeolite.

【0004】[0004]

【発明が解決しようとする課題】しかしながら、塩化ア
ルミニウムなどの金属ハロゲン化物を主体として用いる
触媒は強い腐食性を有しているため装置の主要部に耐食
性合金の使用が必要である。
However, since a catalyst mainly containing a metal halide such as aluminum chloride has a strong corrosive property, it is necessary to use a corrosion resistant alloy in the main part of the apparatus.

【0005】一方白金−アルミナなどのようないわゆる
二元機能触媒は塩化アルミニウム触媒のような欠点はな
いが、実用的な反応速度を得るためにはそれらの触媒に
塩化アルミニウムを昇華あるいは含浸させる方法、CC
などのハロアルカンの蒸気を含むガスとそれらの触
媒を反応させハロゲン元素を吸着あるいは化学結合によ
って触媒上に導入させる方法などのように反応に対する
活性化処理を行わなければならない。この場合、反応中
に副生する塩化水素をイソブタン中より分離するための
工程を設けなければならず、工程が複雑である。
On the other hand, so-called bifunctional catalysts such as platinum-alumina do not have the drawbacks of aluminum chloride catalysts, but in order to obtain a practical reaction rate, a method of sublimating or impregnating these catalysts with aluminum chloride is used. , CC
l must perform an activation treatment for the reaction, such as a method for introducing onto the catalyst by adsorption or chemical bonding a halogen element is reacted gases and their catalyst containing vapor of haloalkanes, such as 4. In this case, a step for separating hydrogen chloride, which is a by-product during the reaction, from isobutane must be provided, and the step is complicated.

【0006】[0006]

【課題を解決するための手段】本発明の目的は装置の腐
食及び工程の煩雑さを解消し、更に副生物の生成も抑制
したイソブタンの製造方法を提供するものである。具体
的には金属イオンとしてカリウムを含むヘテロポリ酸塩
並びに白金またはパラジウムからなる貴金属−ヘテロポ
リ酸触媒の存在下にてn−ブタンを異性化してイソブタ
ンを製造する方法である。
SUMMARY OF THE INVENTION An object of the present invention is to provide a method for producing isobutane which eliminates the corrosion of the apparatus and the complexity of the process and suppresses the production of by-products. Specifically, it is a method of producing isobutane by isomerizing n-butane in the presence of a heteropolyacid salt containing potassium as a metal ion and a noble metal-heteropolyacid catalyst composed of platinum or palladium.

【0007】本発明において触媒として用いられるヘテ
ロポリ酸塩は例えば以下のヘテロポリ酸の塩として例示
される。すなわち、縮合配位元素としてMo,Wおよび
Vから選ばれた少なくとも1種の元素を含むものであ
り、さらにその他の元素、例えばNb,Taなどを縮合
配位元素として含んでいてもよい。また、このヘテロポ
リ酸の中心元素は、P,Si,As,Ge,Ti,C
e,Th,Mn,Ni,Te,I,Co,Cr,Fe,
Ga,B,V,Pt,BeおよびZnの群から選ばれた
1種であり、ヘテロポリ酸中の縮合配位元素/中心元素
(原子比)は2.5〜12である。さらにヘテロポリ酸
は単量体のみならず、二量体、三量体などの重合体も使
用できる。
The heteropolyacid salt used as a catalyst in the present invention is exemplified by the following salts of heteropolyacid. That is, it contains at least one element selected from Mo, W and V as the condensation coordination element, and may further contain other elements such as Nb and Ta as the condensation coordination element. The central element of this heteropolyacid is P, Si, As, Ge, Ti, C.
e, Th, Mn, Ni, Te, I, Co, Cr, Fe,
It is one kind selected from the group of Ga, B, V, Pt, Be and Zn, and the condensation coordination element / central element (atomic ratio) in the heteropolyacid is 2.5 to 12. Further, the heteropolyacid can be used not only as a monomer but also as a polymer such as a dimer or trimer.

【0008】これらヘテロポリ酸の具体例としてはリン
モリブデン酸、リンタングステン酸、リンモリブドバナ
ジン酸、リンモリブドタングストバナジン酸、リンタン
グストバナジン酸、リンモリブドニオブ酸、ケイタング
ステン酸、ケイモリブデン酸、ケイモリブドタングステ
ン酸、ケイモリブドタングストバナジン酸、ホウタング
ステン酸、ホウモリブデン酸、ホウモリブドタングステ
ン酸、ホウモリブドバナジン酸、ホウモリブドタングス
トバナジン酸、コバルトモリブデン酸、コバルトタング
ステン酸、砒素モリブデン酸、砒素タングステン酸など
である。
Specific examples of these heteropolyacids include phosphomolybdic acid, phosphotungstic acid, phosphomolybdovanadic acid, phosphomolybdotungstovanadic acid, phosphotungstovanadic acid, phosphomolybdniobic acid, silicotungstic acid, silicomolybdic acid. , Silico molybdo tungstic acid, silico molybdo tungstovanadic acid, borotungstic acid, boromolybdic acid, bomolibdo tungstic acid, bomolibdo vanadic acid, homolybdo tungstovanadic acid, cobalt molybdic acid, cobalt tungstic acid, arsenic Examples include molybdic acid and arsenic tungstic acid.

【0009】これらヘテロポリ酸は市販品を用いても良
いが原料化合物から合成して用いても良い。原料化合物
としては各元素の硝酸塩、アンモニウム塩、有機酸塩、
ハロゲン化合物などの塩類、酸化物を組み合わせて使用
することができる。
Commercially available products of these heteropolyacids may be used, or they may be synthesized from the raw material compounds and used. As raw material compounds, nitrates, ammonium salts, organic acid salts of each element,
Salts such as halogen compounds and oxides can be used in combination.

【0010】本発明において用いられるヘテロポリ酸塩
の陽イオンはカリウムであるが、陽イオンのうち一部が
であってもよい。
The cation of the heteropolyacid salt used in the present invention is potassium, but a part of the cation may be H + .

【0011】本発明において用いられる貴金属−ヘテロ
ポリ酸触媒の白金またはパラジウムの重量比には特に限
定されないが、活性および経済性の点から、白金または
パラジウムはヘテロポリ酸塩と重量比で0.0001〜
20となるように添加されるものが効果的である。
The weight ratio of platinum or palladium of the noble metal-heteropolyacid catalyst used in the present invention is not particularly limited, but from the viewpoint of activity and economy, platinum or palladium is added in a weight ratio of 0.0001 to 0.0001 to the heteropolyacid salt.
What is added so as to be 20 is effective.

【0012】さらに本発明の方法で使用する触媒は無担
体でも有効であるが、シリカ、シリコンカーバイト、ケ
イソウ土等の不活性担体に担持して用いることが好まし
く、このとき用いられるヘテロポリ酸塩の量は特に制限
はないが、触媒総重量に対して通常1wt%以上、好ま
しくは10wt%以上が良い。また、白金またはパラジ
ウムの担持率は仕上がった触媒中に0.01〜20wt
%となるよう調製されるものが効果的である。
Further, the catalyst used in the method of the present invention is effective even without a carrier, but it is preferable to use it by supporting it on an inert carrier such as silica, silicon carbide, diatomaceous earth, and the heteropolyacid salt used at this time. The amount is not particularly limited, but is usually 1 wt% or more, preferably 10 wt% or more, based on the total weight of the catalyst. The loading rate of platinum or palladium is 0.01 to 20 wt% in the finished catalyst.
What is prepared so that it becomes% is effective.

【0013】本発明に用いられる触媒の調製方法は既に
公知である蒸発乾固法、沈澱法、酸化物混合法等の種々
の方法を用いることができ、例えば白金またはパラジウ
ム前駆体、ヘテロポリ酸およびカリウム化合物を混合し
焼成すること、あるいは、カリウムを含む白金またはパ
ラジウム前駆体およびヘテロポリ酸を混合し焼成するこ
となどにより得ることができる。このとき、白金または
パラジウムの前駆体としてはそれら金属の硝酸塩、ハロ
ゲン化合物、アンミン錯体、有機錯体などを使用するこ
とができる。またカリウムを含む白金またはパラジウム
の前駆体としては塩化白金酸カリウムまたは塩化パラジ
ウム酸カリウムなどが効果的に用いられる。また、カリ
ウム化合物としては炭酸カリウム、硝酸カリウムなどの
塩類が用いられるが、水酸化カリウムなどの塩基を用い
ても良い。
As the method for preparing the catalyst used in the present invention, various known methods such as an evaporation-drying method, a precipitation method and an oxide mixing method can be used. For example, platinum or palladium precursor, heteropolyacid and It can be obtained by mixing and baking a potassium compound, or by mixing and baking a platinum or palladium precursor containing potassium and a heteropolyacid. At this time, as the platinum or palladium precursor, nitrates of these metals, halogen compounds, ammine complexes, organic complexes and the like can be used. As the platinum-containing or palladium-containing precursor containing potassium, potassium chloroplatinate or potassium chloropalladate is effectively used. As the potassium compound, salts such as potassium carbonate and potassium nitrate are used, but a base such as potassium hydroxide may be used.

【0014】蒸発乾固法の具体的な例としては以下の方
法などが挙げられる。純水にヘキサクロロ白金酸を溶解
した水溶液を調製する。別にヘテロポリ酸を溶解した水
溶液および炭酸カリウムを溶解した水溶液を調製する。
白金酸水溶液にヘテロポリ酸水溶液を添加し、さらに炭
酸カリウム水溶液を添加し撹拌する。その後、加熱濃
縮、蒸発乾固して得られた固形物を乾燥し、成形して空
気焼成する。焼成温度は250〜500℃、好ましくは
300〜400℃である。
Specific examples of the evaporation-drying method include the following methods. An aqueous solution of hexachloroplatinic acid dissolved in pure water is prepared. Separately, an aqueous solution in which heteropolyacid is dissolved and an aqueous solution in which potassium carbonate is dissolved are prepared.
The aqueous solution of heteropolyacid is added to the aqueous solution of platinum acid, and further the aqueous solution of potassium carbonate is added and stirred. Then, the solid matter obtained by heating and concentrating and evaporating to dryness is dried, molded and air-baked. The firing temperature is 250 to 500 ° C, preferably 300 to 400 ° C.

【0015】本発明の実施に際して、反応温度は100
〜400℃、好ましくは200〜350℃がよい。反応
圧力は数十mmHg〜90Kg/cmG好ましくは1
〜50Kg/cmGである。反応開始時あるいは流通
反応器入口における水素とn−ブタンのモル比は0.1
〜20の範囲を必要とし、好ましくは0.5〜10の範
囲で行う。空間速度は300〜10000hr−1、好
ましくは500〜3000hr−1である。
In carrying out the present invention, the reaction temperature is 100.
~ 400 ° C, preferably 200-350 ° C. The reaction pressure is several tens of mmHg to 90 Kg / cm 2 G, preferably 1
˜50 Kg / cm 2 G. At the start of the reaction or at the inlet of the flow reactor, the molar ratio of hydrogen to n-butane is 0.1.
-20 is required, and preferably 0.5-10. The space velocity is 300 to 10000 hr -1 , preferably 500 to 3000 hr -1 .

【0016】なお、反応ガス中に本反応に不活性なガ
ス、例えば窒素、ヘリウム、アルゴン等が混入していて
もよい。
The reaction gas may be mixed with a gas inert to this reaction, such as nitrogen, helium, or argon.

【0017】[0017]

【実施例】以下に本発明による触媒の調製法および、そ
の触媒を用いた反応例を具体的に説明するが、本発明は
これらに限定されるものではない。
EXAMPLES The preparation method of the catalyst according to the present invention and the reaction examples using the catalyst will be specifically described below, but the present invention is not limited thereto.

【0018】実施例1 純水200mlにヘキサクロロ白金酸2gを溶解し撹拌
した。別に200mlの純水にリンタングステン酸7
9.7gを溶解した水溶液を撹拌しながら添加し、さら
に12mol/lの硝酸200mlを加えた。次に、別
に250mlの純水に水酸化カリウム1.43gを溶解
した水溶液を撹拌しながら添加した。最後にコロイド状
のシリカであるスノーテックスN(日産化学社製)37
5gを加えて撹拌しながら加熱濃縮、蒸発乾固した。得
られた固形物を120℃で12時間乾燥後、成形して空
気気流中350℃で3時間焼成した。カリウムとヘテロ
ポリ酸の組成比はmol比で1:1である。
Example 1 2 g of hexachloroplatinic acid was dissolved in 200 ml of pure water and stirred. Separately, add phosphotungstic acid 7 to 200 ml of pure water.
An aqueous solution in which 9.7 g was dissolved was added with stirring, and 200 ml of 12 mol / l nitric acid was further added. Next, separately, an aqueous solution in which 1.43 g of potassium hydroxide was dissolved in 250 ml of pure water was added while stirring. Lastly, Snowtex N (manufactured by Nissan Kagaku), which is colloidal silica 37
5 g was added, and the mixture was heated with stirring, concentrated, and evaporated to dryness. The obtained solid was dried at 120 ° C. for 12 hours, molded, and fired in an air stream at 350 ° C. for 3 hours. The composition ratio of potassium to heteropolyacid is 1: 1 in terms of mol ratio.

【0019】本触媒5gをステンレス製の固定床式反応
器に充填し、300℃に昇温し水素によって1時間還元
した。次に、n−ブタン、水素および窒素をモル比で
1:4:11となるように流通し、空間速度を1000
−1となるようにして触媒層に導入した。生成物はガ
スクロマトグラフフィーによって分析したところ、転化
率10%、生成物中のイソブタン選択率96%、物質収
支97%であった。
5 g of this catalyst was charged into a stainless fixed bed reactor, heated to 300 ° C. and reduced with hydrogen for 1 hour. Next, n-butane, hydrogen and nitrogen were circulated so that the molar ratio was 1: 4: 11, and the space velocity was 1000.
It was introduced into the catalyst layer so that it would be h −1 . When the product was analyzed by gas chromatography, the conversion rate was 10%, the isobutane selectivity in the product was 96%, and the material balance was 97%.

【0020】実施例2 リンタングステン酸を79.7g、水酸化カリウムを
2.86gを使用した以外は実施例1と同様な方法で触
媒を調製した。カリウムとヘテロポリ酸の組成比はmo
l比で2:1である。実施例1と同様な方法で反応を行
ったところ、転化率7.4%、生成物中のイソブタン選
択率95%、物質収支99%を得た。
Example 2 A catalyst was prepared in the same manner as in Example 1 except that 79.7 g of phosphotungstic acid and 2.86 g of potassium hydroxide were used. The composition ratio of potassium and heteropoly acid is mo
The ratio is 2: 1. When the reaction was carried out in the same manner as in Example 1, a conversion rate of 7.4%, an isobutane selectivity in the product of 95% and a mass balance of 99% were obtained.

【0021】実施例3 12mol/lの硝酸200mlにヘキサクロロ白金酸
2gを溶解し撹拌した。別に12mol/lの硝酸20
0mlにリンタングステン酸80.6gを溶解した水溶
液を撹拌しながら添加した。次に、別に250mlの純
水に水酸化カリウム0.22gを溶解した水溶液を撹拌
しながら添加した。最後にコロイド状のシリカであるス
ノーテックスN(日産化学社製)375gを加えて撹拌
しながら加熱濃縮、蒸発乾固した。得られた固形物を1
20℃で12時間乾燥後、成形して空気気流中350℃
で3時間焼成した。カリウムとヘテロポリ酸の組成比は
mol比で0.3:1である。
Example 3 2 g of hexachloroplatinic acid was dissolved in 200 ml of 12 mol / l nitric acid and stirred. Separately, 12 mol / l nitric acid 20
An aqueous solution in which 80.6 g of phosphotungstic acid was dissolved in 0 ml was added with stirring. Next, separately, an aqueous solution in which 0.22 g of potassium hydroxide was dissolved in 250 ml of pure water was added while stirring. Finally, 375 g of Snowtex N (manufactured by Nissan Kagaku Co., Ltd.), which is a colloidal silica, was added, and the mixture was heated, concentrated and evaporated to dryness while stirring. 1 solid obtained
After drying at 20 ° C for 12 hours, molding and air-streaming at 350 ° C
It was baked for 3 hours. The composition ratio of potassium to heteropolyacid is 0.3: 1 in terms of mol ratio.

【0022】実施例1と同様の反応条件で反応を行った
ところ、転化率19%、生成物中のイソブタン選択率9
1%、物質収支92%であった。
When the reaction was carried out under the same reaction conditions as in Example 1, the conversion was 19% and the isobutane selectivity in the product was 9%.
The balance was 1% and the material balance was 92%.

【0023】実施例4 12mol/lの硝酸200mlにヘキサクロロ白金酸
カリウム1.9gを溶解し撹拌した。別に200mlの
純水にリンタングステン酸79.7gを溶解した水溶液
を撹拌しながら添加し、さらに12mol/lの硝酸2
00mlを加えた。次にコロイド状のシリカであるスノ
ーテックスN(日産化学社製)375gを加えて撹拌し
ながら加熱濃縮、蒸発乾固した。得られた固形物を12
0℃で12時間乾燥後、成形して空気気流中350℃で
3時間焼成した。カリウムとヘテロポリ酸の組成比はm
ol比で0.3:1である。
Example 4 1.9 g of potassium hexachloroplatinate was dissolved in 200 ml of 12 mol / l nitric acid and stirred. Separately, an aqueous solution in which 79.7 g of phosphotungstic acid was dissolved in 200 ml of pure water was added with stirring, and further 12 mol / l of nitric acid 2 was added.
00 ml was added. Next, 375 g of Snowtex N (manufactured by Nissan Kagaku Co., Ltd.), which is a colloidal silica, was added, and the mixture was heated, concentrated and evaporated to dryness while stirring. The solid obtained is 12
After drying at 0 ° C. for 12 hours, it was molded and fired in an air stream at 350 ° C. for 3 hours. The composition ratio of potassium and heteropoly acid is m
The ol ratio is 0.3: 1.

【0024】実施例1と同様な方法で反応を行った。そ
の結果、転化率17%、生成物中のイソブタン選択率9
4%、物質収支99%を得た。
The reaction was carried out in the same manner as in Example 1. As a result, the conversion rate was 17% and the isobutane selectivity in the product was 9%.
4% and material balance 99% were obtained.

【0025】実施例5 12mol/lの硝酸200mlにヘキサクロロ白金酸
カリウム1.9gを溶解し撹拌した。別に200mlの
純水にリンタングステン酸78.7gを溶解した水溶液
を撹拌しながら添加し、さらに12mol/lの硝酸2
00mlを加えた。次に水酸化カリウムを2.39g溶
解した水溶液を撹拌しながら添加した。最後にコロイド
状のシリカであるスノーテックスN(日産化学社製)3
75gを加えて撹拌しながら加熱濃縮、蒸発乾固した。
得られた固形物を120℃で12時間乾燥後、成形して
空気気流中350℃で3時間焼成した。カリウムとヘテ
ロポリ酸の組成比はmol比で2:1である。
Example 5 1.9 g of potassium hexachloroplatinate was dissolved in 200 ml of 12 mol / l nitric acid and stirred. Separately, an aqueous solution in which 78.7 g of phosphotungstic acid was dissolved in 200 ml of pure water was added with stirring, and further 12 mol / l of nitric acid 2 was added.
00 ml was added. Next, an aqueous solution in which 2.39 g of potassium hydroxide was dissolved was added with stirring. Lastly, Snowtex N (manufactured by Nissan Chemical Co., Ltd.) 3 which is colloidal silica
75 g was added, and the mixture was concentrated with heating with stirring and evaporated to dryness.
The obtained solid was dried at 120 ° C. for 12 hours, molded, and fired in an air stream at 350 ° C. for 3 hours. The composition ratio of potassium to heteropolyacid is 2: 1 in terms of mol ratio.

【0026】実施例1と同様な方法で反応を行った。そ
の結果、転化率20%、生成物中のイソブタン選択率9
7%、物質収支96%を得た。
The reaction was carried out in the same manner as in Example 1. As a result, the conversion was 20% and the isobutane selectivity in the product was 9
7% and material balance 96% were obtained.

【0027】[0027]

【発明の効果】以上述べたとおり本発明のようにヘテロ
ポリ酸塩を用いてイソブタンを製造することにより、触
媒による装置の腐食の問題が解消され、有機塩素等の特
別の活性化処理によるプロセス上の煩雑性も解消され
る。さらに本発明において触媒として用いられるヘテロ
ポリ酸のカリウム塩は異性化触媒として一般に問題とな
る副生物、特にコーク生成が抑制され、活性の向上をは
かることができる。
As described above, by producing isobutane by using a heteropolyacid salt as in the present invention, the problem of corrosion of the equipment by the catalyst is solved, and the process by the special activation treatment of organic chlorine is eliminated. The complexity of is also eliminated. Further, the potassium salt of a heteropoly acid used as a catalyst in the present invention can suppress the production of by-products which are generally problematic as an isomerization catalyst, particularly coke formation, and can improve the activity.

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】金属イオンとしてカリウムを含むヘテロポ
リ酸塩並びに白金またはパラジウムからなる貴金属−ヘ
テロポリ酸触媒の存在下にてn−ブタンを異性化するこ
とを特徴とするイソブタンの製造方法。
1. A process for producing isobutane, which comprises isomerizing n-butane in the presence of a heteropolyacid salt containing potassium as a metal ion and a noble metal-heteropolyacid catalyst composed of platinum or palladium.
【請求項2】白金またはパラジウム前駆体、ヘテロポリ
酸およびカリウム化合物を混合し、焼成することにより
得られる貴金属−へテロポリ酸触媒を用いることを特徴
とする請求項1に記載のイソブタンの製造方法。
2. The method for producing isobutane according to claim 1, wherein a noble metal-heteropolyacid catalyst obtained by mixing a platinum or palladium precursor, a heteropolyacid and a potassium compound and firing the mixture is used.
【請求項3】カリウムを含む白金またはパラジウム前駆
体とヘテロポリ酸を混合し、焼成することにより得られ
る貴金属−へテロポリ酸触媒を用いることを特徴とする
請求項1に記載のイソブタンの製造方法。
3. The method for producing isobutane according to claim 1, wherein a noble metal-heteropolyacid catalyst obtained by mixing a platinum or palladium precursor containing potassium and a heteropolyacid and firing the mixture is used.
JP4129809A 1992-04-24 1992-04-24 Production of isobutane Pending JPH05306240A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4129809A JPH05306240A (en) 1992-04-24 1992-04-24 Production of isobutane

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4129809A JPH05306240A (en) 1992-04-24 1992-04-24 Production of isobutane

Publications (1)

Publication Number Publication Date
JPH05306240A true JPH05306240A (en) 1993-11-19

Family

ID=15018763

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4129809A Pending JPH05306240A (en) 1992-04-24 1992-04-24 Production of isobutane

Country Status (1)

Country Link
JP (1) JPH05306240A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012502057A (en) * 2008-09-04 2012-01-26 ラムス テクノロジー インク Olefin isomerization and metathesis catalysts
US10441944B2 (en) * 2015-06-30 2019-10-15 Hindustan Petroleum Corporation Ltd. Catalyst composition for isomerization of paraffins

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012502057A (en) * 2008-09-04 2012-01-26 ラムス テクノロジー インク Olefin isomerization and metathesis catalysts
US9023753B2 (en) 2008-09-04 2015-05-05 Lummus Technology Inc. Olefin isomerization and metathesis catalyst
US10441944B2 (en) * 2015-06-30 2019-10-15 Hindustan Petroleum Corporation Ltd. Catalyst composition for isomerization of paraffins

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