JP2000290207A - Production of phenols - Google Patents
Production of phenolsInfo
- Publication number
- JP2000290207A JP2000290207A JP11095050A JP9505099A JP2000290207A JP 2000290207 A JP2000290207 A JP 2000290207A JP 11095050 A JP11095050 A JP 11095050A JP 9505099 A JP9505099 A JP 9505099A JP 2000290207 A JP2000290207 A JP 2000290207A
- Authority
- JP
- Japan
- Prior art keywords
- hydrocarbon
- cumene
- phenols
- acid decomposition
- arylalkyl
- 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
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 150000002989 phenols Chemical class 0.000 title claims abstract description 18
- RWGFKTVRMDUZSP-UHFFFAOYSA-N cumene Chemical compound CC(C)C1=CC=CC=C1 RWGFKTVRMDUZSP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 15
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 12
- -1 arylalkyl hydrocarbon Chemical class 0.000 claims abstract description 11
- 150000002432 hydroperoxides Chemical class 0.000 claims abstract description 8
- 230000001965 increasing effect Effects 0.000 claims abstract description 8
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 6
- IAUKWGFWINVWKS-UHFFFAOYSA-N 1,2-di(propan-2-yl)naphthalene Chemical compound C1=CC=CC2=C(C(C)C)C(C(C)C)=CC=C21 IAUKWGFWINVWKS-UHFFFAOYSA-N 0.000 claims abstract description 3
- VUMCUSHVMYIRMB-UHFFFAOYSA-N 1,3,5-tri(propan-2-yl)benzene Chemical compound CC(C)C1=CC(C(C)C)=CC(C(C)C)=C1 VUMCUSHVMYIRMB-UHFFFAOYSA-N 0.000 claims abstract description 3
- UNEATYXSUBPPKP-UHFFFAOYSA-N 1,3-Diisopropylbenzene Chemical compound CC(C)C1=CC=CC(C(C)C)=C1 UNEATYXSUBPPKP-UHFFFAOYSA-N 0.000 claims abstract description 3
- SPPWGCYEYAMHDT-UHFFFAOYSA-N 1,4-di(propan-2-yl)benzene Chemical compound CC(C)C1=CC=C(C(C)C)C=C1 SPPWGCYEYAMHDT-UHFFFAOYSA-N 0.000 claims abstract description 3
- PMPBFICDXLLSRM-UHFFFAOYSA-N 1-propan-2-ylnaphthalene Chemical compound C1=CC=C2C(C(C)C)=CC=CC2=C1 PMPBFICDXLLSRM-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229930007927 cymene Natural products 0.000 claims abstract description 3
- HFPZCAJZSCWRBC-UHFFFAOYSA-N p-cymene Chemical compound CC(C)C1=CC=C(C)C=C1 HFPZCAJZSCWRBC-UHFFFAOYSA-N 0.000 claims abstract description 3
- AMBHHSBRXZAGDZ-UHFFFAOYSA-N 1-phenyl-2,3-di(propan-2-yl)benzene Chemical group CC(C)C1=CC=CC(C=2C=CC=CC=2)=C1C(C)C AMBHHSBRXZAGDZ-UHFFFAOYSA-N 0.000 claims abstract 2
- 238000000034 method Methods 0.000 claims description 11
- 150000002430 hydrocarbons Chemical class 0.000 claims description 8
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical compound C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 235000010290 biphenyl Nutrition 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 2
- 125000002029 aromatic hydrocarbon group Chemical group 0.000 claims description 2
- 239000004305 biphenyl Substances 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 claims 1
- 230000001590 oxidative effect Effects 0.000 claims 1
- 238000000354 decomposition reaction Methods 0.000 abstract description 22
- 239000002253 acid Substances 0.000 abstract description 21
- 238000010543 cumene process Methods 0.000 abstract 2
- HKTCLPBBJDIBGF-UHFFFAOYSA-N 1-phenyl-2-propan-2-ylbenzene Chemical group CC(C)C1=CC=CC=C1C1=CC=CC=C1 HKTCLPBBJDIBGF-UHFFFAOYSA-N 0.000 abstract 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 abstract 1
- 239000013064 chemical raw material Substances 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 238000007634 remodeling Methods 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 9
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 6
- FRIBMENBGGCKPD-UHFFFAOYSA-N 3-(2,3-dimethoxyphenyl)prop-2-enal Chemical compound COC1=CC=CC(C=CC=O)=C1OC FRIBMENBGGCKPD-UHFFFAOYSA-N 0.000 description 5
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 4
- 239000007795 chemical reaction product Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- RGSFGYAAUTVSQA-UHFFFAOYSA-N Cyclopentane Chemical compound C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 description 2
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 description 2
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical compound CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 2
- 150000001336 alkenes Chemical group 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- USIUVYZYUHIAEV-UHFFFAOYSA-N diphenyl ether Chemical compound C=1C=CC=CC=1OC1=CC=CC=C1 USIUVYZYUHIAEV-UHFFFAOYSA-N 0.000 description 2
- NNPPMTNAJDCUHE-UHFFFAOYSA-N isobutane Chemical compound CC(C)C NNPPMTNAJDCUHE-UHFFFAOYSA-N 0.000 description 2
- OKIRBHVFJGXOIS-UHFFFAOYSA-N 1,2-di(propan-2-yl)benzene Chemical class CC(C)C1=CC=CC=C1C(C)C OKIRBHVFJGXOIS-UHFFFAOYSA-N 0.000 description 1
- MLXMBIUVXPMUPK-UHFFFAOYSA-N 1-butan-2-yl-2-ethylbenzene Chemical compound CCC(C)C1=CC=CC=C1CC MLXMBIUVXPMUPK-UHFFFAOYSA-N 0.000 description 1
- GWLLTEXUIOFAFE-UHFFFAOYSA-N 2,6-diisopropylnaphthalene Chemical compound C1=C(C(C)C)C=CC2=CC(C(C)C)=CC=C21 GWLLTEXUIOFAFE-UHFFFAOYSA-N 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- 102100039851 DNA-directed RNA polymerases I and III subunit RPAC1 Human genes 0.000 description 1
- 101710112289 DNA-directed RNA polymerases I and III subunit RPAC1 Proteins 0.000 description 1
- 239000003377 acid catalyst Substances 0.000 description 1
- 150000001491 aromatic compounds Chemical class 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- UFRQQBZAYHXOKS-UHFFFAOYSA-N cumene;phenol Chemical compound OC1=CC=CC=C1.CC(C)C1=CC=CC=C1 UFRQQBZAYHXOKS-UHFFFAOYSA-N 0.000 description 1
- DMEGYFMYUHOHGS-UHFFFAOYSA-N heptamethylene Natural products C1CCCCCC1 DMEGYFMYUHOHGS-UHFFFAOYSA-N 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000001282 iso-butane Substances 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- YWAKXRMUMFPDSH-UHFFFAOYSA-N pentene Chemical compound CCCC=C YWAKXRMUMFPDSH-UHFFFAOYSA-N 0.000 description 1
- ZJMWRROPUADPEA-UHFFFAOYSA-N sec-butylbenzene Chemical compound CCC(C)C1=CC=CC=C1 ZJMWRROPUADPEA-UHFFFAOYSA-N 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、炭化水素を原料と
してヒドロペルオキシド類を経由するフェノール類製造
プロセスにおける酸分解反応に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an acid decomposition reaction in a process for producing phenols from hydrocarbons via hydroperoxides.
【０００２】[0002]
【従来の技術】炭化水素を酸素含有気体にて酸化して、
対応するヒドロペルオキシド類に選択的に転化させ、酸
触媒によってヒドロペルオキシド類を分解してフェノー
ル類を得るクメン法フェノール類製造方法において、酸
分解反応は減圧，あるいは常圧条件下で行われる。2. Description of the Related Art Hydrocarbons are oxidized with an oxygen-containing gas,
In the cumene method for producing phenols by selectively converting to the corresponding hydroperoxides and decomposing the hydroperoxides with an acid catalyst to obtain phenols, the acid decomposition reaction is carried out under reduced pressure or normal pressure.
【０００３】しかし減圧，あるいは常圧条件は酸分解反
応除熱に有効であるが、反応温度が低いために酸分解反
応効率に上限が生じ、フェノール類生産量の増加ができ
ない。[0003] However, reduced pressure or normal pressure conditions are effective for heat removal of the acid decomposition reaction, but the reaction temperature is low, so that an upper limit is imposed on the acid decomposition reaction efficiency and the phenol production cannot be increased.
【０００４】[0004]
【発明が解決しようとする課題】発明は、フェノール類
の製造における上記問題を解決するためになされたもの
であって、酸分解反応条件を加圧にすることがフェノー
ル類生産量の増加に有用であることを見出して、本発明
に至ったものである。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems in the production of phenols, and it is useful to increase the amount of phenols produced by increasing the pressure of the acid decomposition reaction. It has been found that this has led to the present invention.
【０００５】即ち、本発明は、酸分解反応において加圧
条件を与えることによって反応温度を上昇させ、フェノ
ール類の増産方法を提供することを目的とする。[0005] That is, an object of the present invention is to provide a method for increasing the production of phenols by increasing the reaction temperature by applying pressurizing conditions in the acid decomposition reaction.
【０００６】その方法としては不活性ガスによる配管内
圧力調整、またはヒドロペルオキシドラインにシールポ
ットを設けることによる圧力調整でもよいが、その方法
に制限されることはない。[0006] The method may be pressure adjustment in a pipe using an inert gas, or pressure adjustment by providing a seal pot in a hydroperoxide line, but is not limited thereto.
【０００７】[0007]
【課題を解決するための手段】本発明は、加圧条件下で
ヒドロペルオキシド類を酸分解することによって、フェ
ノール類の増産効果を得ることを特徴とするクメン法フ
ェノール類の製造方法である。SUMMARY OF THE INVENTION The present invention relates to a method for producing phenols by the cumene method, characterized in that hydroperoxides are acid-decomposed under pressurized conditions to thereby obtain an effect of increasing the production of phenols.
【０００８】発明によるフェノール類の製造方法は、酸
分解反応を６００〜２０００ｍｍＨ 2Ｏ程度の条件に維
持することによって、同一酸分解設備におけるフェノー
ル類の増産を可能にすることを特徴とする。The process for producing phenols according to the present invention comprises the steps of:
Decomposition reaction at 600-2000mmH TwoO-condition
Phenol in the same acid decomposition facility
It is characterized by the ability to increase the production of rutiles.
【０００９】対象とするフェノール類の出発原料である
炭化水素は、２級炭素を有するパラフィン、オレフィ
ン、シクロパラフィン、アリールアルキル炭化水素等が
挙げられ、具体的な好ましい例として、２級炭素を有す
るパラフィンとしてイソブタン等、オレフィンとしてペ
ンテン、イソブテン等、シクロパラフィンとしてシクロ
ペンタン、シクロヘキサン等、アリールアルキル炭化水
素としてクメン、サイメン等を挙げることができるが、
これらに限定されるものではない。The hydrocarbon as a starting material of the target phenols includes paraffins having a secondary carbon, olefins, cycloparaffins, arylalkyl hydrocarbons, and the like. Specific preferred examples include those having a secondary carbon. Isobutane as paraffin, pentene as olefin, isobutene and the like, cyclopentane as cycloparaffin, cyclohexane and the like, cumene as arylalkyl hydrocarbon, cimen and the like,
It is not limited to these.
【００１０】アリールアルキル炭化水素として、下記一
般式（Ｉ）で示される化合物を挙げることができる。The arylalkyl hydrocarbon includes a compound represented by the following general formula (I).
【００１１】一般式（Ｉ）の化合物Compound of general formula (I)
【００１２】[0012]
【化２】 Embedded image
【００１３】（式中、Ｐ及びＱは、水素又はアルキル基
を示し、相互に同じであってもよく、異なっていてもよ
く、ｘは１〜３の整数を示し、Ａｒはｘ価の芳香族炭化
水素基を示す。）で表される化合物。(Wherein, P and Q represent hydrogen or an alkyl group, which may be the same or different, x represents an integer of 1 to 3, and Ar represents an x-valent aromatic compound. A group hydrocarbon group).
【００１４】一般式（Ｉ）において、Ｐ及びＱの少なく
ともいずれかがアルキル基であることが好ましく、特
に、いずれもがアルキル基であることが好ましい。上記
アルキル基としては、特にメチル基が好ましい。また、
芳香族炭化水素基はベンゼン、ナフタレン、ビフェニ
ル、ジフェニルエーテル等から導かれるｘ価の炭化水素
基を挙げることができるが、好ましくはベンゼン又はナ
フタレンから導かれるｘ価の炭化水素基である。In the general formula (I), at least one of P and Q is preferably an alkyl group, and particularly preferably both are an alkyl group. The alkyl group is particularly preferably a methyl group. Also,
Examples of the aromatic hydrocarbon group include x-valent hydrocarbon groups derived from benzene, naphthalene, biphenyl, diphenyl ether and the like, and preferably x-valent hydrocarbon groups derived from benzene or naphthalene.
【００１５】従って、本発明において、アリールアルキ
ル炭化水素の好ましい具体例としては、例えば、クメ
ン、サイメン、ｍ−ジイソプロピルベンゼン、ｐ−ジイ
ソプロピルベンゼン等のジイソプロピルベンゼン類、
１,３,５−トリイソプロピルベンゼン等のトリイソプロ
ピルベンゼン類、エチルベンゼン、sec-ブチルベンゼ
ン、sec-ブチルエチルベンゼン、イソプロピルナフタレ
ン類、２，６−ジイソプロピルナフタレン等のジイソプ
ロピルナフタレン類、イソプロピルビフェニル類、４，
４’−ジイソプロピルビフェニル等のジイソプロピルビ
フェニル類や、これらの２種以上の混合物を挙げること
ができる。しかし、これらに限定されるものではない。Accordingly, in the present invention, preferred specific examples of the arylalkyl hydrocarbon include diisopropylbenzenes such as cumene, cymene, m-diisopropylbenzene, p-diisopropylbenzene, and the like.
Triisopropylbenzenes such as 1,3,5-triisopropylbenzene, ethylbenzene, sec-butylbenzene, sec-butylethylbenzene, isopropylnaphthalenes, diisopropylnaphthalenes such as 2,6-diisopropylnaphthalene, isopropylbiphenyls, 4,
Examples thereof include diisopropyl biphenyls such as 4′-diisopropyl biphenyl, and a mixture of two or more of these. However, it is not limited to these.
【００１６】本発明における酸分解反応は、回分式，連
続式のいずれでも行うことができる。必要に応じて遷移
金属錯体等の触媒を併用することも可能である。The acid decomposition reaction in the present invention can be carried out in either a batch system or a continuous system. If necessary, a catalyst such as a transition metal complex can be used in combination.
【００１７】[0017]
【実施例】以下にヒドロペルオキシド類の酸分解による
フェノール類の製造方法を実施例として説明する。しか
し、本発明はこれら実施例により何ら限定されるもので
はない。EXAMPLES A method for producing phenols by acid decomposition of hydroperoxides will be described below as examples. However, the present invention is not limited by these examples.
【００１８】実施例１ ２０万トン／Ｙ規模のクメン法フェノール製造施設にお
いて、酸分解反応器の内圧を６００ｍｍＨ2Ｏとして酸
分解反応を行った。Example 1 At a 200,000 ton / Y scale cumene phenol production facility, an acid decomposition reaction was carried out at an internal pressure of an acid decomposition reactor of 600 mmH 2 O.
【００１９】その結果、ボトム反応温度が７８．９℃と
なり、酸分解反応物中の残留クメンヒドロペルオキシド
（ＣＨＰ）０．０４ｐｐｍ以下を維持する条件において
フェノール生産量は６０８トン／Ｄとなった。As a result, the bottom reaction temperature was 78.9 ° C., and the phenol production amount was 608 tons / D under the condition that the residual cumene hydroperoxide (CHP) in the acid decomposition reaction product was maintained at 0.04 ppm or less.
【００２０】実施例２ 酸分解反応器の内圧を１１００ｍｍＨ2Ｏとする以外
は、実施例１と同様の反応を行った。Example 2 The same reaction as in Example 1 was carried out except that the internal pressure of the acid decomposition reactor was changed to 1100 mmH 2 O.
【００２１】その結果、ボトム反応温度が７９．６℃と
なり、酸分解反応物中の残留ＣＨＰ０．０４ｐｐｍ以下
を維持する条件においてフェノール生産量は６１７トン
／Ｄとなった。As a result, the bottom reaction temperature was 79.6 ° C., and the phenol production was 617 tons / D under the condition that the residual CHP in the acid decomposition reaction product was maintained at 0.04 ppm or less.
【００２２】実施例３ 酸分解反応器の内圧を１６００ｍｍＨ2Ｏとする以外
は、実施例１と同様の反応を行った。Example 3 The same reaction as in Example 1 was carried out except that the internal pressure of the acid decomposition reactor was 1600 mmH 2 O.
【００２３】その結果、ボトム反応温度が８２．０℃と
なり、酸分解反応物中の残留ＣＨＰ０．０４ｐｐｍ以下
を維持する条件においてフェノール生産量は６２４トン
／Ｄとなった。As a result, the bottom reaction temperature was 82.0 ° C., and the phenol production amount was 624 tons / D under the condition that the residual CHP in the acid decomposition reaction product was maintained at 0.04 ppm or less.
【００２４】比較例１ 酸分解反応器の内圧が３００ｍｍＨ2Ｏである以外は、
実施例１と同様の反応を行った。Comparative Example 1 Except that the internal pressure of the acid decomposition reactor was 300 mmH 2 O,
The same reaction as in Example 1 was performed.
【００２５】ボトム反応温度は７８．０℃となり、酸分
解反応物中の残留ＣＨＰ０．０４ｐｐｍ以下を維持する
条件においてフェノール生産量は６００トン／Ｄであっ
た。The bottom reaction temperature was 78.0 ° C., and the phenol production was 600 tons / D under the condition that the residual CHP in the acid decomposition reaction product was maintained at 0.04 ppm or less.
【００２６】[0026]
【発明の効果】以上のように、本発明によれば、クメン
法フェノール類製造方法における酸分解反応を加圧条件
下で行うことによって、設備改造を伴わずにフェノール
類の増産効果を得ることができる。As described above, according to the present invention, it is possible to obtain an effect of increasing the production of phenols without modifying the equipment by performing the acid decomposition reaction in the cumene method for producing phenols under pressurized conditions. Can be.
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Claims (5)
解することによって、フェノール類の増産効果を得るこ
とを特徴とするクメン法フェノール類の製造方法。1. A method for producing phenols by the cumene method, wherein an effect of increasing the production of phenols is obtained by acid-decomposing hydroperoxides under pressurized conditions.
含有気体にて酸化して得られたものである、請求項１記
載の方法。2. The method according to claim 1, wherein the hydroperoxide is obtained by oxidizing a hydrocarbon with an oxygen-containing gas.
に同じであってもよく、異なっていてもよく、ｘは１〜
３の整数を示し、Ａｒはｘ価の芳香族炭化水素基を示
す。）で表されるアリールアルキル炭化水素であり、こ
のアリールアルキル炭化水素を酸素含有気体にて酸化し
て、対応するアリールアルキルヒドロペルオキシド類に
選択的に転化することを特徴とする請求項１記載の方
法。(3) a hydrocarbon represented by the general formula (I): (Wherein, P and Q represent hydrogen or an alkyl group and may be the same or different from each other, and x is 1 to
An integer of 3 is shown, and Ar represents an x-valent aromatic hydrocarbon group. The arylalkyl hydrocarbon represented by the formula (1), wherein the arylalkyl hydrocarbon is oxidized with an oxygen-containing gas to selectively convert to a corresponding arylalkyl hydroperoxide. Method.
炭化水素がクメン、サイメン、ｍ−ジイソプロピルベン
ゼン、ｐ−ジイソプロピルベンゼン、１,３,５−トリイ
ソプロピルベンゼン、イソプロピルナフタレン、ジイソ
プロピルナフタレン、イソプロピルビフェニル、ジイソ
プロピルビフェニル又はこれらの２種以上の混合物であ
ることを特徴とする請求項３記載の方法。4. An arylalkyl hydrocarbon represented by the general formula (I) is cumene, cymene, m-diisopropylbenzene, p-diisopropylbenzene, 1,3,5-triisopropylbenzene, isopropylnaphthalene, diisopropylnaphthalene, isopropyl 4. The method according to claim 3, wherein the method is biphenyl, diisopropylbiphenyl, or a mixture of two or more thereof.
請求項３記載の方法。5. The method according to claim 3, wherein the arylalkyl hydrocarbon is cumene.
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