Green Production of Phthalic Anhydride from Biobased Furan and Maleic Anhydride by an Acid Resin Catalyst

Different polyesteramides hyperbranched polymers (HPEA1-6)/montomorillonite clay (MMT) nanocomposites were prepared with three different loading contents of clay (4, 10, and 15 wt%). The obtained nanocomposites were characterized via XRD, thermal analyses, and TEM. Generally, intercalation behavior was observed. The hyperbranched polyesteramides (HPEA1-6) were originally prepared by the bulky reaction between maleic anhydride (MAn), succinic anhydride (ScAn), and phthalic anhydride (PhAn) with either diethanolamine (DEA) or diisopropanolamine (DiPA). The resulting hyperbranched polyesteramides (HPEA1-6) were characterized by GPC, IR,1H-NMR, TGA, and DSC.

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Ion-exchange-resin-catalyzed adamantylation of phenol derivatives with adamantanols: Developing a clean process for synthesis of 2-(1-adamantyl)-4-bromophenol, a key intermediate of adapalene

Beilstein Journal of Organic Chemistry ◽

10.3762/bjoc.8.23 ◽

2012 ◽

Vol 8 ◽

pp. 227-233 ◽

Cited By ~ 6

Author(s):

Nan Wang ◽

Ronghua Wang ◽

Xia Shi ◽

Gang Zou

Keyword(s):

Acetic Acid ◽

Ion Exchange ◽

Sulfonic Acid ◽

Exchange Resin ◽

Ion Exchange Resin ◽

Phenol Derivatives ◽

Resin Catalyst ◽

Acid Resin ◽

Free Process ◽

Sulfonic Acid Resin

A clean process has been developed for the synthesis of 2-adamantylphenol derivatives through adamantylation of substituted phenols with adamantanols catalyzed by commercially available and recyclable ion-exchange sulfonic acid resin in acetic acid. The sole byproduct of the adamantylation reaction, namely water, could be converted into the solvent acetic acid by addition of a slight excess of acetic anhydride during the work-up procedure, making the process waste-free except for regeneration of the ion-exchange resin, and facilitating the recycling of the resin catalyst. The ion-exchange sulfonic acid resin catalyst could be readily recycled by filtration and directly reused at least ten times without a significant loss of activity. The key intermediate of adapalene, 2-(1-adamantyl)-4-bromophenol, could be produced by means of this waste-free process.

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PRODUCTION AND PROPERTIES OF 2,3-BUTANEDIOL XXXVI. LINEAR POLYESTERS OF 2,3-BUTANEDIOL

Canadian Journal of Research ◽

10.1139/cjr50b-078 ◽

1950 ◽

Vol 28b (10) ◽

pp. 652-659 ◽

Cited By ~ 7

Author(s):

R. W. Watson ◽

N. H. Grace ◽

J. L. Barnwell

Keyword(s):

Molecular Weight ◽

Maleic Anhydride ◽

Phthalic Anhydride ◽

Dibasic Acid ◽

Side Reaction ◽

Methyl Ethyl ◽

Cyclic Monomer ◽

Dimethyl Terephthalate ◽

Ethyl Malonate ◽

Methylene Groups

New polyesters with basic units containing 6, 7, 8, 9, 10, 13, and 14 chain atoms have been prepared from levo-2,3-butanediol and ethyl oxalate, ethyl malonate, dimethyl terephthalate, maleic anhydride, succinic, glutaric, adipic, azelaic, and sebacic acids, and from meso-2,3-butanediol and o-phthalic anhydride. Esterification of 2,3-butanediol with a dibasic acid, or its anhydride, is accompanied by a side reaction, in which butanone-2 and the cyclic methyl ethyl ketal are formed. The purified polyesters, with the exception of the poly-malonate, appear to be composed of regularly recurring acid and diol segments over the molecular weight ranges investigated. Without exception they are amorphous resins or balsams. Polyesters formed from saturated aliphatic dibasic acids become progressively softer as the number of methylene groups in the acid segment increases. The polymeric oxalate, on distillation in vacuo, is converted to a macrocrystalline cyclic monomer.

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Synthesis and Characterization of Alkyd Resin Based on Soybean Oil Polyols

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.239-242.1721 ◽

2011 ◽

Vol 239-242 ◽

pp. 1721-1724 ◽

Cited By ~ 1

Author(s):

Xiao Qing Zheng ◽

Li Ting Yang ◽

Kun Peng Wang

Keyword(s):

Maleic Anhydride ◽

Soybean Oil ◽

Phthalic Anhydride ◽

Alkyd Resin ◽

Ring Opening ◽

Molar Ratio ◽

Synthesis And Characterization ◽

Hydroxyl Value

Soybean oil-based alkyd resin was prepared using soy-based polyol, maleic anhydride and phthalic anhydride. The soy-based polyol was obtained through the epoxidization of soybean oil, followed by ring-opening with methanol and, the hydroxyl values of soybean oil-based polyols used in this reaction is 169.93 mgKOH/g. In the reactions of soy-based polyol, maleic anhydride and phthalic anhydride, the molar ratio of hydroxyl value is equal to carboxyl value and the molar ratio of maleic anhydride to phthalic anhydride is 2:1, 1:1 and 1:2, respectively. 1% hydroquinone based on total reactants was used as inhibitor of polymerization, 1% dibutyltin oxide was used as catalyst.

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A highly efficient sulfonic acid resin for liquid-phase carbonylation of dimethoxymethane

Catalysis Science & Technology ◽

10.1039/c7cy02158e ◽

2018 ◽

Vol 8 (2) ◽

pp. 580-590 ◽

Cited By ~ 6

Author(s):

Fei Chen ◽

Lei Shi ◽

Jie Yao ◽

Yan Wang ◽

Dongxi Zhang ◽

...

Keyword(s):

Liquid Phase ◽

Sulfonic Acid ◽

Highly Efficient ◽

Resin Catalyst ◽

Acid Resin ◽

Sulfonic Acid Resin

The influence of H2O content on DMM carbonylation using a DICP-001 resin catalyst (Fig. 6).

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SYNTHESIS OF PARA-BRIDGED BENZENE COMPOUNDS. III

Canadian Journal of Chemistry ◽

10.1139/v52-040 ◽

1952 ◽

Vol 30 (4) ◽

pp. 291-294 ◽

Cited By ~ 12

Author(s):

M. F. Bartlett ◽

S. K. Figdor ◽

K. Wiesner

Keyword(s):

Maleic Anhydride ◽

Phthalic Anhydride ◽

Considerable Difficulty ◽

Benzene Compounds

2-5-Octamethylene tetrahydrophthalic anhydride does not form even a trace of the corresponding phthalic anhydride on dehydrogenation, but partly dissociates back into cyclododecadiene and maleic anhydride. 2-5-Nonamethylene tetrahydrophthalic anhydride dehydrogenates with considerable difficulty.

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