Poly(ester-b-carbonate)s are successfully synthesized for the first time through the metal-free copolymerization of cyclohexene oxide (CHO), propylene oxide (PO), phthalic anhydride (PA), and CO2 in a one-pot/one-step protocol. PHTHALIC ACIDS, the name given to the three isomeric benzene-dicarboxylic acids, C6114(CO2H)2: (I) ortho, or phthalic acid; (2) meta, or isophthalic acid; (3) para, or terephthalic acid. Phthalic acid is an aromatic dicarboxylic acid, with formula C 6 H 4 (CO 2 H) 2. The meta-ph-thalic anhydride may beseparated from residual oxides, meta-l salts, and other :byeproducts by heating to temperatures in the neighborhood of -500 to 850 degrees Fahrenheit, at which temperatures the-meta-ph-th-alie anhydride may be separated by sublimation. 4. Environ Sci Pollut Res Int. by carboxylation, Manufacture of a lower fatty acid anhydride, Process for producing beta-fluoroethyl thiolacetate, Preparation of unsaturated chloronitriles, CCXC.—An accessible derivative of chromonol, 213. As one of the most important aromatic compounds, meta ‐phthalic (MPA) is widely used in organic synthesis, particularly in the polyester and paint industry. 1). UNII-X35216H9FJ. A wide variety of Phthalic acid options are available to you. and condensing the meta-phthalic acid anhydride. 1. Isophthalic acid is an organic compound with the formula C6H4(CO2H)2. However, many phthalate esters have been implicated as endocrine disruptors. Molecular Weight 245.03 . [5], Phthalic acid is produced by the catalytic oxidation of naphthalene or ortho-xylene directly to phthalic anhydride and a subsequent hydrolysis of the anhydride.[5]. The material dissolves in aqueous alkali, such as ten percent sodium hydroxide solution; and when the sodium hydroxide solution is neutralized and rendered weakly acid with acetic acid, it gives an orange-pink color upon addition of ferric ion. The preparation of phthalocyanine and some metallic derivatives from o-cyanobenzamide and phthalimide, 14-hydroxymorphinone and 8, 14-dihydroxydihydromorphinone, Antimonial analogues of the cacodyl series, Process for the production of terephthalic acid, Reacting calcium carbonated and wet process phosphoric acid, Substituted 1, 10-Phenanthrolines. Patented Oct. 9, 1 951 OFF-EC META PHT-H-ALIC ACID ANHYDRIDE AND METHOD OF MAKING SAME GeorgeWalton, Cincinnati, Ohio N Drawing. The material is slightly soluble in hot water to give a solution having an acid reaction. 1‐octanol shows a good extractive selectivity for [1,1′‐biphenyl]‐2,2′‐dicarboxylic acid as compared with phthalic … Phthalic acid is an aromatic dicarboxylic acid, with formula C6H4(CO2H)2. CHEBI:30802. t h arr yqr d 9 me a-Phin as and t9 met od of mak g m t -Fe a e acid an hydride- 'Hemtei re. Phthalic acid, also called benzene d-carboxylic acid, has the chemical formula C 6 H 4 (COOH) 2. A process for preparing the inner anhydride of meta-phthalic acid which comprises heating the inner salt of meta-phthalic acid and a divalent metal selected from the group consisting of lead, copper, and calcium to a temperature of 500 degrees F. to about 850 degrees F. to form meta-phthalic acid anhydride vapor and condensing the meta-phthalic acid anhydride vapor. Compound of the anthracene series and process of making same. MDL number MFCD00152019. How do you say Meta-phthalic acid? A process for preparing the inner anhydride of meta-phthalic acid which comprises heating the inner meta-phthalate of di-valent lead to a temperature of 500 degrees Fahrenheit to 850 degrees Fahrenheit ,to form meta-phthalic acid anhydride vapor, and condensing the metaphthalic acid anhydride. '7. Although phthalic acid is of modest commercial importance, the closely related derivative phthalic anhydride is a commodity chemical produced on a large scale. gOn cooling, the meta-phthalic anhydride crystallizes in the form of slender, long, transparent 'to white needles or feathers. The ‘Substance identity’ section is calculated from substance identification information from all ECHA databases. Different isomers of phthalic acid are known by different names. 75701-44-9. Phthalic acid is one of three isomers of benzenedicarboxylic acid, the others being isophthalic acid and terephthalic acid. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Dec. 14, 1937 2,116,656 Dreyfus May 10, 1938 2,439,203 Ellingboe Apr. US3027400A US5631A US563160A US3027400A US 3027400 A US3027400 A US 3027400A US 5631 A US5631 A US 5631A US 563160 A US563160 A US 563160A US 3027400 A US3027400 A US 3027400A Authority US United States Prior art keywords alcohol trimellitic acid Acide isophtalique. This invention relates to derivatives of .n etae liha i id 19 mere part ularl rel es. See more. The product has no observable melting point at atmospheric pressure but sublimes at a temperature of about 361 degrees Fahrenheit. Phthalocyanines. Phthalic acid is converted to its anhydride simply by heating (see below Polycarboxylic acids).Phthalic anhydride is used to make polymeric resins called alkyd resins, which are used as coatings, especially for 2019 Apr;26(10):9435-9442. doi: 10.1007/s11356-019-04373-1. A process for preparing the inner anhydride of meta-phthalic acid which comprises heating the inner calcium meta-phthalate to a temperature of approximately 800 degrees Fahrenheit to form meta-phthalic acid anhydride vapor, and condensing the meta-phthalic acid anhydride. There is a list of all A. C. 8., vol. Orthophthalic acid definition, See under phthalic acid (def. phthalic acid (plural phthalic acids) (organic chemistry) Any of three isomeric aromatic organic benzenedicarboxylic acids, C 6 H 4 (COOH) 2; especially the ortho-isomer manufactured from naphthalene, used in the synthesis of dyes, perfumes and other compounds. A PROCESS FOR PREPARING THE INNER ANHYDRIDE OF META-PHTHALIC ACID WHICH COMPRISES HEATING THE INNER SALT OF META-PHTHALIC ACID AND A DIVALENT METAL TO A TEMPERATURE OF 500 DEGREES F. TO APPROXIMATELY 850 DEGREES F. TO FORM METAPHTHALIC ACID ANHYDRIDE VAPOR AND THEN CONDENSING THE META-PHTHALIC ACID ANHYDRIDE VAPOR. Phthalic acid was obtained by Laurent in 1836 by oxidizing naphthalene tetrachloride, and, believing it to be a naphthalene derivative, he named it naphthalenic acid, Marignac determined its formula and showed Laurent’s supposition to be incorrect, upon which Laurent gave it its present name. At higher temperatures, there maybe other materials which distill with the metaphthalic anhydride. The anhydride may be separated from these other materials which may distill with it by reesublimation, extraction with a solvent such as benzene, or by other suitable separation methods. A process for preparing the inner anhydride of meta-phthalic acid which comprises heating the inner cupric meta-phthalate to a temperature of 500 degrees Fahrenheit to 850,degrees Fahrenheit to form meta-phthalic acid anhydride vapor. 5-Bromoisophthalic acid Synonym: 5-Bromo-1,3-benzenedicarbonic acid, 5-Bromo-1,3-benzenedicarboxylic acid, 5-Bromoisophthalic acid CAS Number 23351-91-9. Substance identity Substance identity. It is relatively insoluble in cold water, moderately soluble in ethanol and carbon tetrachloride, and very soluble in benzene. AI3-16107. P1 degrades phthalic acid. 8. Although phthalic acid is of modest commercial importance, the closely related derivative phthalic anhydride is a commodity chemical produced on a large scale. The irradiation may be in the presence of an oxidizing atmosphere, an inert atmosphere, or a vacuum, but should not be carried out in a reducing atmosphere. .A p ma bb ct 9 this n tipn is to repare t e an rdr. The (1,3-benzenecarboxylic acid) is the meta form of phthalic acid. Manufacture of meta-and para-phthalic acid esters Download PDF Info Publication number US3027400A. Briefly, .the present invention is based on the discovery that a salt of meta-phthalic acid and a di-valent metal, for example the meta-phthalate of dievalent lead, ,copper or calcium, can .be transformed by treatment with applied heat or by exposing to ultra-violet radiation, into a mixture containing'meta-phthalic anhydride. You can also submit buying request for the Phthalic acid and specify your requirement on okchem.com, and we will help you find the quality Phthalic acid … Ea'ample I A sample of the meta.-phtha'l ate of di-valent ,leacl having a White color' was placed in an Example II A second sample of" the meta-phthalate of divalent lead was placed in an enclosed glass reaction vessel in an oxidizing atmosphere (air) and heated to a temperature of between degrees Fahrenheit and 850 degrees Fahrenheit for 10 minutes. [10], This article uses material from the Wikipedia article Sign in to disable ALL ads. The stoichiometry of the complex formation of TBP or TRPO and phthalic acid is 1:1, and the apparent extraction equilibrium constant for TRPO is much larger than that for TBP. 2. It is a white crystalline solid subliming at 345°C. meta phthalic acid anhydride acid anhydride degrees fahrenheit Prior art date 1948-10-15 Legal status (The legal status is an assumption and is not a legal conclusion. Epub 2019 Feb 8. BRN 1909332. meta-benzenedicarboxylic acid. Phthalic acid is one of three isomers of benzenedicarboxylic acid, the others being isophthalic acid and terephthalic acid. Expired - Lifetime Application number US54823A Inventor Walton George Sometimes the term "phthalic acids" is used to refer to this family of isomers, but in the singular, "phthalic acid", refers exclusively to the ortho- isomer. Kyselina isoftalova. See more. The reaction between indole and acetic anhydride, Process for the preparation of benzoic acid and benzoates, Bicyclic structures prohibiting the walden inversion. The inner anhydride of meta-phthalic acid. Isophthalic acid definition, a colorless, crystalline, slightly water-soluble solid, C8H6O2, the meta isomer of phthalic acid: used chiefly in the manufacture of resins and plasticizers. 6, 1948 2,443,494 Cass June 15, 1948 OTHER REFERENCES Bucher et al., J. The main industrial uses of purified isophthalic acid (PIA) are for the production of polyethylene terephthalate (PET) resin and for the production of unsaturated polyester resin (UPR) and other types of coating resins. Acide isophtalique [French] Kyselina isoftalova [Czech] NSC 15310. Phthalate esters and childhood asthma: A systematic review and congener-specific meta-analysis Environ Pollut. 6. Having described my invention, what I claim as novel and desire to secure by Letters Patent is: l. A process for preparing the inner anhydride of meta-phthalic acid which comprises heating the inner salt of meta-phthalic acid and a divalent metal to'a'temperature of 500 degrees F. to approximately 850 degrees F. to form metaphthalic acid anhydride vapor and then condensing the meta-phthalic acid anhydride vapor. In the preparation of meta-phthalic anhydride, a salt of meta-phthalic acid and a divalent metal, such as lead or copper metaphthalate, may first be subjected to radiant energy. NACRES NA.22 Believing the resulting substance to be a naphthalene derivative, he named it "naphthalic acid". Commercially, the majority of MPA is produced by the air oxidation of meta-xylene (MX) in acetic acid (HAc) in the temperature range The most important is the first, as it forms the starting material in the production of many synthetic dyes and of the synthetic resin, glyptal, glyceryl phthalate. Part II. 31, pp. [8] Manufacturing methods in the nineteenth century included oxidation of naphthalene tetrachloride with nitric acid, or, better, oxidation of the hydrocarbon with fuming sulfuric acid, using mercury or mercury(II) sulfate as a catalyst. 3. Epub 2017 Jul 7. he h dr de 9 meta-rh lie acid has t b en lmpwn- The anhy r de 9 phth acid is c mma but meth ds by which ortho-phthalic acid anhydride is prepared have ot suc es nll rroduced th anhvd de of meta-phthalic acid. authors in Wikipedia, database,rohs,reach,compliancy,directory,listing,information,substance,material,restrictions,data sheet,specification, InChI=1S/C8H6O4/c9-7(10)5-3-1-2-4-6(5)8(11)12/h1-4H,(H,9,10)(H,11,12), InChI=1/C8H6O4/c9-7(10)5-3-1-2-4-6(5)8(11)12/h1-4H,(H,9,10)(H,11,12), Except where otherwise noted, data are given for materials in their, This website uses tracking mechanisms by using technically not necessary cookies in order to offer and constantly improve its services, and to provide individual offers. The exposure of the divalent metal salts of meta-phthalic acid to radiant energy may be in the dry state or the vapor state; After irradiation of the salt, the product may be removed by heating the mixed reaction prod-.-, - not to temperatures between 500 degrees Fahrenheit and 850 degrees Fahrenheit, the optimum temperature being about 700 degrees Fahrenheit. The monopotassium salt, potassium hydrogen phthalate is a standard acid in analytical chemistry. Phthalamic acid definition is - a crystalline compound HOOCC6H4CONH2 formed by reaction of phthalic anhydride and ammonia; the half amide of phthalic acid. As endocrine disruptors the status listed. observable melting point at atmospheric pressure but sublimes a. Of isophthalic acid and terephthalic acid been implicated as endocrine disruptors and terephthalic.. Between indole and acetic acid ( insoluble in cold water, alcohol and acetic anhydride, process preparation. 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