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公开(公告)号：CA1111452A
公开(公告)日：1981-10-27
申请号：CA331475
申请日：1979-07-10
Applicant: MITSUI PETROCHEMICAL IND
Inventor： HASHIMOTO ISAO , NAKAGAWA HIROAKI , TAGUCHI TORU , NAMBU HIROHIKO
Abstract: The invention is a process for purifying crude resorcinol derived from an acid cleavage product of m-diisopropyl benzene dihydroperoxide and containing impurities having higher boiling points than resorcinol. The process involves recrystallizing the crude resorcinol from a mixed solvent consisting of (a) about 0.5 to about 5 times the weight of resorcinol of an aromatic hydrocarbon which contains 6 to 10 carbon atoms and is liquid at 20.degree.C, and (b) about 0.1 to about 0.7 times the weight of resorcinol of at least one compound selected from the group consisting of alkyl phenols having a C1-C4 alkyl group and acyl phenols derived from C2-C4 aliphatic monocarboxylic acids.
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公开(公告)号：CA1279654C
公开(公告)日：1991-01-29
申请号：CA526242
申请日：1986-12-23
Applicant: MITSUI PETROCHEMICAL IND
Inventor： SAEKI KENJI , FUKUHARA HIROSHI , AGO TOKINORI , TAGUCHI TORU , MIKI HISAYA , HANEDA YUTAKA , YOSHIMOTO SADAO
Abstract: In a process for producing 2,6-dihydroxynaphtha-lene from 2,6-diisopropylnaphthalene, 2,6-diisopropyl-naphthalene is oxidized in the presence of a specific proportion of a basic compound to hydroxylate or hydroperoxylate 2,6-diisopropylnaphthalene in a high conversion, and the resulting intermediate is then subjected to acid cleavage in the presence of hydrogen peroxide to produce 2,6-dihydroxynaphthalene in a high yield. The yield of 2,6-dihydroxynaphthalene increases by subjecting the reaction mixture containing the above intermediate to a purifying operation or dehydrating operation or adding acetone to it before it is submitted to the acid cleavage. 2,6-Dihydroxynaphthalene may be reacted with acetic anhydride to obtain 2,6-diacetoxynaphthalene.
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公开(公告)号：DE2921503A1
公开(公告)日：1979-12-06
申请号：DE2921503
申请日：1979-05-28
Applicant: MITSUI PETROCHEMICAL IND
Inventor： HASHIMOTO ISAO , TAGUCHI TORU , NAMBU HIROHIKO
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公开(公告)号：DE3681026D1
公开(公告)日：1991-09-26
申请号：DE3681026
申请日：1986-04-28
Applicant: MITSUI PETROCHEMICAL IND
Inventor： SAEKI KENJI , FUKUHARA HIROSHI , AGOO TOKINORI , TAGUCHI TORU , MIKI HISAYA , HANEDA YUTAKA , YOSHIMOTO SADAO
IPC: C07C27/12 , C07C37/08 , C07C39/14 , C07C67/08 , C07C69/16 , C07C407/00 , C07C409/08
Abstract: In this improved process for oxidising 2,6-diisopropylnaphthalene the oxidation is by molecular oxygen in the presence of basic compounds the total consumption of which at the end of the reaction is at least 0.06 gm equivalent (preferred 0.2-1.0 gm equivalent) per starting molecule of 2,6-diisopropylnaphthalene (the end of the reaction is when at least 80 wt.% is oxidised, preferred 99 wt.%). The main oxidised products in the intermediate mixture are the dihydroperoxide, the monohydroxy monohydroperoxide, and the dihydroxide of 2,6-diisopropylnaphthalene. The intermediate mixture is reacted with an acid in the presence of hydrogen peroxide to produce 2,6-dihydroxynaphthalene. The reaction with the acid can be carried out after purification and/or dehydration of the intermediate mixture, acetone, if necessary, being added. 2,6-diacetoxynaphthalene may be obtd. by reacting the 2,6-dihydroxynaphthalene with glacial acetic acid.
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公开(公告)号：DE2927810A1
公开(公告)日：1980-01-24
申请号：DE2927810
申请日：1979-07-10
Applicant: MITSUI PETROCHEMICAL IND
Inventor： HASHIMOTO ISAO , NAKAGAWA HIROAKI , IWAKUNI YAMAGUCHI , TAGUCHI TORU , NAMBU HIROHIKO
Abstract: In a process for purification of crude resorcinol derived from an acid-cleavage product of m-diisopropylbenzene dihydroperoxide and containing impurities having higher boiling points than resorcinol is, the recrystallization of said crude resorcinol from a mixed solvent consisting of (a) about 0.5 to about 5 times the weight of resorcinol of an aromatic hydrocarbon which contains 6 to 10 carbon atoms and is liquid at 20 DEG C., and (b) about 0.1 to about 0.7 time the weight of resorcinol of at least one compound selected from the group consisting of alkyl phenols having a C1-C4 alkyl group and acyl phenols derived from C2-C4 aliphatic monocarboxylic acids.
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Patent Agency Ranking
公开(公告)号：EP0239643A4
公开(公告)日：1988-01-21
申请号：EP86902517
申请日：1986-04-28
Applicant: MITSUI PETROCHEMICAL IND
Inventor： SAEKI KENJI , FUKUHARA HIROSHI , AGOO TOKINORI , TAGUCHI TORU , MIKI HISAYA , HANEDA YUTAKA , YOSHIMOTO SADAO
IPC: C07C27/12 , C07C37/08 , C07C39/14 , C07C67/08 , C07C69/16 , C07C407/00 , C07C409/08 , C07C179/035 , C07C178/00
CPC classification number: C07C409/08 , C07C37/08 , C07C67/08 , C07C407/00 , C07C69/017 , C07C69/16 , C07C39/14
Abstract: A process for producing 2,6-dihydroxynaphthalene from 2,6-diisopropylnaphthalene, which comprises oxidizing 2,6-diisopropylnaphthalene using a specific proportion of a basic compound to thereby hydroxylate or perhydroxylate 2,6-diisopropylnaphthalene with a high conversion, and decomposing the resulting intermediate with an acid in the presence of hydrogen peroxide to produce 2,6-dihydroxynaphthalene in a high yield. The yield of 2,6-dihydroxynaphthalene can be further improved by conducting purification, dehydration or addition of acetone before acid decomposition of the reaction mixture containing the intermediate. 2,6-Dihydroxynaphthalene may be recovered as 2,6-diacetoxynaphthalene by reacting with glacial acetic acid.
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公开(公告)号：JPH01168758A
公开(公告)日：1989-07-04
申请号：JP32726587
申请日：1987-12-25
Applicant: MITSUI PETROCHEMICAL IND
Inventor： IKEJIRI FUMITOSHI , TAGUCHI TORU
Abstract: PURPOSE:To obtain the title compsn. which is excellent in mechanical properties, such as heat resistance and rigidity, thermal deformation temp. and sliding characteristics (surface smoothness, friction coefficient, load resistance, etc.), by blending a polyamide with a potassium titanate fiber, and a glass fiber and/or a carbon fiber in respective predetermined proportions. CONSTITUTION:Units of a dicarboxylic acid component (a) composed of 65-100mol% terephthalic acid and 35-0mol% other arom. dicarboxylic acid (e.g., isophthalic acid) are polycondensed with units of a diamine component (b) composed of an aliph. diamine (e.g., 1,6-diaminohexane) and/or an alicyclic diamine [e.g., bis(aminomethyl)cyclohexane], thereby obtaining a polyamide (A). 100 pts.wt. component (A) is blended with 5-40 pts.wt. potassium titanate fiber(B) having a fiber diameter of 0.1-3mum and a fiber length of 5-100mum, and 20-100 pts.wt. glass fiber having a fiber diameter of 1-20mum and a fiber length of 1-10mm and/or carbon fiber having a fiber diameter of 5-20mum and a fiber length of 0.2-20mm (C).
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公开(公告)号：JPS6330437A
公开(公告)日：1988-02-09
申请号：JP17510286
申请日：1986-07-25
Applicant: MITSUI PETROCHEMICAL IND
Inventor： MIKI HISAYA , TAGUCHI TORU , HIROKANE SHINYA
IPC: C07B61/00 , C07C27/00 , C07C29/132 , C07C37/08 , C07C39/12 , C07C39/14 , C07C67/00 , C07C69/16 , C07C409/12
Abstract: PURPOSE:Diisopropylnaphthalene is oxidized with O2 in the presence of a base and the product is subjected to acidolysis, allowed to react with an acyloxylating agent whereby the title compound of high purity, which is used as a starting material for liquid crystal polymers, is obtained in high yield. CONSTITUTION:Diisopropylnaphthalene is oxidized molecular oxygen in the presence of a base to give an oxidation product containing Diisopropylnaphthalene hydroperoxide. The product is subjected to acidolysis, an acyloxylating agent such as acetic anhydride is allowed to react with the acidolysis reaction mixture containing dihydroxynaphthalene in the presence of a catalyst. Diacyloxynaphthalene is separated from the reaction mixture.
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公开(公告)号：JPS63264540A
公开(公告)日：1988-11-01
申请号：JP9823987
申请日：1987-04-21
Applicant: MITSUI PETROCHEMICAL IND
Inventor： ISHIGURO MASAHARU , MIKI HISAYA , HIROKANE SHINYA , NITAHARA MASATOSHI , TAGUCHI TORU
IPC: C07C43/20 , C07B61/00 , C07C27/00 , C07C37/11 , C07C39/14 , C07C39/38 , C07C41/00 , C07C41/30 , C07C43/225 , C07C43/23 , C07C67/00 , C07C69/035
Abstract: PURPOSE:To produce the titled compound useful as a raw material for asymmetric polymer, additive for polymer production, etc., in high yield, by reacting naphthalenes in the presence of a peroxide and an acid and, if necessary, acylating the reaction product. CONSTITUTION:1,1'-Binaphthols of formula II (e.g. 2,2',6,6'-tetraphydroxy-1,1'- binaphthyl) can be produced by reacting naphthalenes of formula I (R is H or alkyl; R is H, hydroxy, alkyl, alkoxy or halogen) (e.g. 2,6-dihydroxynaph thalene) in the presence of a peroxide (e.g. hydrogen peroxide) and an acid (e.g. sulfuric acid) and, if necessary, reacting the product with an acylation agent (e.g. formic acid and acetic acid). The process can be performed without brominating a naphthalene compound as a raw material, using decreased amount of catalyst and preventing coloring of the product.
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公开(公告)号：JPS6339831A
公开(公告)日：1988-02-20
申请号：JP18239386
申请日：1986-08-02
Applicant: MITSUI PETROCHEMICAL IND
Inventor： SAEKI KENJI , FUKUHARA HIROSHI , MIKI HISAYA , TAGUCHI TORU
Abstract: PURPOSE:To purify the titled compound useful as a raw material for synthetic resins, synthetic fibers, drugs, agricultural chemicals, dye, etc., by crystallizing crude dihydronatphthalene by the use of a solvent system constituting of water and an aliphatic ketone or aliphatic alcohol. CONSTITUTION:In purifying low-purity dihydroxynaphthalene which is obtained by oxidizing diisopropylnaphthalene with O2 in the presence of a base, and subjecting the oxidation product to acidolysis to give low-purity dihydroxynaphthalene and purifying, thence, crystallization is carried out by the use of a mixed solvent of water or 3-4 Caliphatic ketone (especially preferably acetone) or a mixed solvent of water or 1-5C aliphatic alcohol (e.g. especially preferably methanol, ethanol or isopropanol). The amount of water is preferably 5-95 pts. wt. based on 100 pts. wt. mixed solvent in both the solvents.
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