PREPARATION OF TRIMETHYLHYDROQUINONE
PURPOSE:To prepare trimethylhydroquinone, economically, by thermally dealkylating a monoalkyl trimethylhydroquinone in the presence of a catalyst. CONSTITUTION:Trimethylhydroquinone is prepared by dealkylating the monoalkyl trimethylhydroquinone of formula (R is alkyl; R is H or CH3) in the presence...
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| creator | TANIGUCHI KATSUO IMAGAWA MASAO FUJIMOTO TADAAKI |
| description | PURPOSE:To prepare trimethylhydroquinone, economically, by thermally dealkylating a monoalkyl trimethylhydroquinone in the presence of a catalyst. CONSTITUTION:Trimethylhydroquinone is prepared by dealkylating the monoalkyl trimethylhydroquinone of formula (R is alkyl; R is H or CH3) in the presence of a catalyst such as inorganic acid (e.g. sulfuric acid, phosphoric acid, etc.), metallic oxide (e.g. alumina, silica, etc.) and/or a strongly acidic ion exchange resin having cation exchange group such as sulfonic acid group, etc. under heating preferably at about 120-300 deg.C, especially about 150-300 deg.C. The compound of formula used as the raw material can be prepared by various methods; however, the trimethylation of a monoalkylhydroquionone with methanol using a transition metal oxide such as iron oxide as a catalyst affords the objective raw material most easily an in high yield. |
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CONSTITUTION:Trimethylhydroquinone is prepared by dealkylating the monoalkyl trimethylhydroquinone of formula (R is alkyl; R is H or CH3) in the presence of a catalyst such as inorganic acid (e.g. sulfuric acid, phosphoric acid, etc.), metallic oxide (e.g. alumina, silica, etc.) and/or a strongly acidic ion exchange resin having cation exchange group such as sulfonic acid group, etc. under heating preferably at about 120-300 deg.C, especially about 150-300 deg.C. The compound of formula used as the raw material can be prepared by various methods; however, the trimethylation of a monoalkylhydroquionone with methanol using a transition metal oxide such as iron oxide as a catalyst affords the objective raw material most easily an in high yield.</description><language>eng</language><subject>ACYCLIC OR CARBOCYCLIC COMPOUNDS ; APPARATUS THEREFOR ; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY ; CHEMISTRY ; GENERAL METHODS OF ORGANIC CHEMISTRY ; METALLURGY ; ORGANIC CHEMISTRY ; PERFORMING OPERATIONS ; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL ; THEIR RELEVANT APPARATUS ; TRANSPORTING</subject><creationdate>1984</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19840214&DB=EPODOC&CC=JP&NR=S5927843A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19840214&DB=EPODOC&CC=JP&NR=S5927843A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>TANIGUCHI KATSUO</creatorcontrib><creatorcontrib>IMAGAWA MASAO</creatorcontrib><creatorcontrib>FUJIMOTO TADAAKI</creatorcontrib><title>PREPARATION OF TRIMETHYLHYDROQUINONE</title><description>PURPOSE:To prepare trimethylhydroquinone, economically, by thermally dealkylating a monoalkyl trimethylhydroquinone in the presence of a catalyst. 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CONSTITUTION:Trimethylhydroquinone is prepared by dealkylating the monoalkyl trimethylhydroquinone of formula (R is alkyl; R is H or CH3) in the presence of a catalyst such as inorganic acid (e.g. sulfuric acid, phosphoric acid, etc.), metallic oxide (e.g. alumina, silica, etc.) and/or a strongly acidic ion exchange resin having cation exchange group such as sulfonic acid group, etc. under heating preferably at about 120-300 deg.C, especially about 150-300 deg.C. The compound of formula used as the raw material can be prepared by various methods; however, the trimethylation of a monoalkylhydroquionone with methanol using a transition metal oxide such as iron oxide as a catalyst affords the objective raw material most easily an in high yield.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | ACYCLIC OR CARBOCYCLIC COMPOUNDS APPARATUS THEREFOR CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY GENERAL METHODS OF ORGANIC CHEMISTRY METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING |
| title | PREPARATION OF TRIMETHYLHYDROQUINONE |
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