CAS: 2420-87-3; [5,5'-Biisobenzofuran]-1,1',3,3'-Tetraone

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CAS号22803-05-0 3,3',4,4'-联苯四羧酸 | CAS号36978-40-2 1,1'-Biphenyl-2... | CAS号1204-28-0 氯化偏苯三酸酐 | CAS号4342-61-4 二氯四甲基二硅烷 | CAS号87639-57-4 4-溴邻苯二甲酸二甲酯 | CAS号7500-55-2 4-Cyclohexene-1...

3,3'4,4'-联苯四羧酸置于乙酸酐体系中,用75.4 %的收率获得3,3',4,4'-联苯四羧酸二酐
参考文献:一种3,3',4,4'-联苯四甲酸二酐的制备方法
标题:一种3,3',4,4'-联苯四甲酸二酐的制备方法
摘要:本发明属于有机化学合成领域,公开了一种3,3',4,4'‑联苯四甲酸二酐的制备方法.本发明先将4‑卤代邻苯二甲酸酐,甲醇,浓硫酸混合,进行反应,得到4‑卤代邻苯二甲酸二甲酯;然后4‑卤代邻苯二甲酸二甲酯在镍催化剂的作用下进行偶联反应,得到3,3',4,4'‑联苯四甲酸四甲酯,此产物经过稀碱水解,酸化得到3,3',4,4'‑联苯四甲酸,最后再脱水,即可得到3,3',4,4'‑联苯四甲酸二酐.本发明中使用镍催化剂催化偶联反应,需要的反应温度可以降低至70~90oc.并且与价格昂贵的钯催化相比,镍催化剂更加廉价,生产成本更低.

专利信息

专利号:US-2008146772-A1
优先权日:2006-11-02
标题 :Materials and methods for co-crystal controlled solid-state synthesis of imides and imines
发明人：ZAWOROTKO MICHAEL J; CHENEY MIRANDA L
权利人:UNIV SOUTH FLORIDA
摘要:The subject invention pertains to methods for solid-state synthesis of imides and imines using co-crystals. The co-crystal formers utilized are substrates of condensation reactions and co-crystals can be obtained in high yield via methods such as slurrying, solvent evaporation, solvent crystallization, treatment with supercritical fluid(s), melting plus crystallization, slurry conversion, grinding of solids, blending of powders, heating of solids, solvent-drop grinding, or grinding plus melting.

专利号:EP-4428168-A1
优先权日:2023-03-08
标 题 :Polyurethane/oligomeric urethane synthesis method by radiation
发明人：AKBULUT HÃœSEYIN; ÇEL KBA SENA; ENADA SEHER; U AKLI MÃœGE; DEM RBAY DUYGU
权利人:CHT TURKEY KIMYA SANAYI VE TICARET A S
摘要:In particular, the invention relates to the synthesis of radiation-curable polyurethane/oligomeric urethane dispersions of anionic and cationic characters, containing neutralization techniques characterized by the selection of counter ions as monomers and/or agents which can be polymers acting as promoters under radiation, to a radiation polyurethane/oligomeric urethane synthesis method that enables the creation of radiation curable binder systems without using cosolvents, surfactants, emulsifiers, defoamers, stabilizers and additives, wherein all components of the radiation-curable binder systems can be polymerized.

专利号:US-2024408567-A1
优先权日:2023-06-09
标 题:Synthesis of porous carbon-based materials from expanded polystyrene
发明人：SAHA DIPENDU; GRAPPE HIPPOLYTE A
权利人:Eco Carbon LLC
摘要:A process for synthesizing a carbon molecular sieve and an activated carbon from expanded polystyrene is provided. The process includes sulfonating the expanded polystyrene with sulfuric acid in the presence of a solvent, for example, chloroform, to obtain sulfonated polystyrene; carbonizing the sulfonated polystyrene to obtain a carbon molecular sieve (CMS) with a substantially high degree of porosity; and activating the CMS by adding an activating agent to the CMS to obtain an activated carbon with a substantially high degree of porosity. The activating agent is selected from one or more of steam, potassium hydroxide, carbon dioxide, zinc chloride, phosphoric acid, sodium carbonate, aluminum chloride, magnesium chloride, and sodium hydroxide. A low temperature of, for example, about 50 degrees Celsius, is employed for sulfonating the expanded polystyrene. Heating and cooling operations in the steps of synthesizing and activating the CMS are performed under a nitrogen gas atmosphere.

专利号:US-10808079-B2
优先权日:2015-03-27
标 题:Synthesis of copolyimides containing fluorine and silicon surface modifying agents
发明人：CONNELL JOHN W; WOHL JR CHRISTOPHER J; DOSS JEREME R; CROW ALLISON M; KIM WILLIAM T; LIN YI
权利人:NASA
摘要:Various embodiments provide random copolyimides that may possess the mechanical, thermal, chemical and optical properties associated with polyimides yet achieve a low energy surface. In various embodiments, the copolyimides may be prepared using a minor amounts of a diamino terminated fluorinated alkyl ether oligomer and a diamino terminated siloxane oligomer. The various embodiments include processes for making the copolyimides containing fluorine and silicon surface modifying agents and anisotropic coatings and articles of manufacture from them. Thus the coatings and articles of manufacture made with the copolyimides of the various embodiments may be characterized as having an anisotropic fluorine and silicon composition and low surface energy.

专利号:US-5104944-A
优先权日:1989-07-18
标题:Process for nucleophilic derivatization of materials having an imide group conjugated to an aromatic moiety
发明人：GOLDBERG MARTIN J; MORRIS DANIEL P; VIEHBECK ALFRED
权利人:IBM
摘要:A process for the synthesis of derivatives of materials containing an imide group conjugated to an aromatic moiety to form an ester, a thioester, an amide, a ketone, and silylesters. Electrons are supplied to redox sites to form a reduced imide material. The reduced imide material is contacted with a nucleophile which opens the imide ring of the reduced imide and chemically combines with a carbonyl carbon atom of the open imide ring to form an imide derivative.

专利号:US-2024408568-A1
优先权日:2023-06-09
标 题:Synthesis of porous carbon-based materials from Expanded Polystyrene (EPS) or Styrofoam
发明人：SAHA DIPENDU; GRAPPE HIPPOLYTE A
权利人:Eco Carbon LLC
摘要:A process for synthesizing a carbon molecular sieve and an activated carbon from expanded polystyrene is provided. The process includes sulfonating the expanded polystyrene with sulfuric acid in the presence of chlorobenzene, to obtain sulfonated polystyrene; carbonizing the sulfonated polystyrene to obtain a carbon molecular sieve (CMS) with a substantially high degree of porosity, and activating the CMS by an activating agent to obtain activated carbon. A low temperature of, for example, about 50 degrees Celsius, is employed for sulfonating the expanded polystyrene. Heating and cooling operations in the steps of synthesizing the CMS are performed under a nitrogen gas atmosphere.