This white solid is an important industrial chemical, especially for the largescale production of plasticizers for plastics. Reactors and separations design project phthalic anhydride production we are continuing our evaluation of process alternatives for the production of phthalic anhydride via the catalytic oxidation of o xylene. Apart from its availability and low cost, it is easy to handle, quite stable up to the temperature at which polyester resins are generally prepared, stable under uv radiation, reduces the reaction time and produces a. Simulation and optimization of the process is done using the new pathway. The production process of phthalic anhydride is quite a complex process, involving several side reactions and byproducts. Production of phthalic anhydride the lummus company. Pdf renewable production of phthalic anhydride from. Phthalic anhydride market global industry analysis, size. Alkyds based on phthalic anhydride or phthalic acid the earlier alkyd resins glyceryl phthalate were all of the heatconvertible variety.
Pdf renewable production of phthalic anhydride from biomass. It is a cyclic dicarboxylic anhydride and a member of 2benzofurans. The asian markets are forecast to see growth in demand, particularly china, india, and southeast asia, while consumption for unsaturated polyester resin is declining in japan. Phthalic anhydride is a chemical intermediate that reacts readily and produces a broad range of products that process easily and give a wide range of performance characteristics at a. More recently an unmodified alkyd refers to a resin prepared from a. Melt of phthalic anhydride containing a small amount of azeotroping agent is maintained at a temperature of from 160 to 200c. Renewable production of phthalic anhydride from biomassderived furan and maleic anhydride article pdf available in green chemistry 161 december 20 with 645 reads how we measure reads. Us4077984a manufacture of phthalic anhydride from oxylene or. Pdf the main process to produce phthalic anhydride in the petrochemical plants is selective oxidation of oxylene within a fixed bed reactor. Phthalic anhydride is available in both flake and liquid molten form. Production of phthalic anhydride from xylene slideshare.
The production contains six steps including dehydration of xylose to furfural, reductive decarbonylation of furfural to furan, oxidation of furfural to maleic anhydride ma, diels. Here we produce phthalic anhydride from the orthophthalic acid which we produced in a previous video. Our pa plant is a manufacturing plant which opened for the first time in the republic of korea. Oct 21, 2019 this statistic shows the production volume of phthalic anhydride in the united states from 1990 to 2018. Manufacture of phthalic anhydride from oxylene or naphthalene download pdf. A route to renewable phthalic anhydride 2benzofuran1,3dione from biomassderived furan and maleic anhydride furan2,5dione is investigated.
Basf, shandong hongxin, and nanya plastics are the leading players in the phthalic anhydride market download pdf the global phthalic anhydride market is a matured one with almost no product differentiation, making the market competition more severe. It used the weiss and downs process employing benzene as a raw material. The condensation of phthalic anhydride with phenols is used to obtain dyes, such as phenolphthalein. The plant produces approximately 75,000 tonney of highpurity 99. Phthalic acid and derivatives lorz major reference. Phthalic anhydride is used to manufacture materials such as artificial resins. Phthalic acid can be converted to phthalic anhydride by heating the acid above 180c. Key application of phthalic anhydride includes production of phthalate plasticizers for making polyvinyl chloride pvc, which is further used on a large scale in construction and automobile industry. Tetrachlorophthalic anhydride is a cyclic dicarboxylic anhydride that is phthalic anhydride chlorinated at the 4, 5, 6 and 7positions. This work proposes a conceptual design of a process for the production of phthalic anhydride from an agricultural residue i. Finally, a comparison between the original design and the alternative one will be. Process for producing phthalic anhydride download pdf.
A process according to claim 2, wherein a portion of the phthalic anhydride melt is withdrawn as more phthalic anhydride is produced. It is known as an adaptable intermediate in chemical processes because it is bifunctional and readily available. This legacy forms a strong foundation for continuous innovation and product improvement. The objective of this study is to produce phthalic anhydride with a purity of 99. Simulation and optimization of the production of phthalic anhydride from oxylene. Production hcc produces pa by orthoxylene based process using the latest technology that guarantees high purity product. The danger of autoignition may be avoided, using inert gas and wetting the dust. The process was simulated using the process simulator aspen plus. A conceptual design of the renewable production of phthalic anhydride is. The most common method for production of phthalic anhydride is by oxidation of oxylene. Means of more effective utilization of industrialgrade naphthalene in phthalic anhydride production have been developed. Che 455 fall 2009 major 1 phthalic anhydride production. Pdf simulation and optimization of the production of.
Specifications for phthalic anhydride parameter value molecular formula c8h4o3 mol wt 148. More recently an unmodified alkyd refers to a resin prepared from a dibasic acid, a polyol, and an oil or fatty acid. Technoeconomic assessment of the production of phthalic. Nov 06, 2019 the global production capacity of phthalic anhydride in 2018 amounted to approximately 5. Of the current production, 50 percent is used for plasticizers, 25 percent for alkyd resins, 20 percent for unsaturated polyester resins. Phthalic anhydride 242, prepared by the oxidation of oxylene, is of major importance to the chemical industry with 1992 production over 400 000 tonnes. A process for the manufacture of phthalic anhydride by oxidizing oxylene. It is used as a raw material for plasticizers, unsaturated polyesters, and other resins. The production of phthalic anhydride is approximately 20,000 tonsyear as required. Reactors and separations design project phthalic anhydride. Pa phthalic anhydride introduction pa is white crystallike flakes at room temperature and transforms into clear colorless liquid at melting point. If necessary refer to the material safety data sheet. Renewable production of phthalic anhydride from biomass. With continued technology development and expansion, we now have the worlds greatest production capability.
Phthalic anhydride market new report by marketsandmarkets. Phthalic anhydride 1 free download as powerpoint presentation. The global production capacity of phthalic anhydride in 2018 amounted to approximately 5. The yield and selectivity of phthalic anhydride in the above catalysts are low because of having small surface areas. Major 1 phthalic anhydride production background you work for an operating company that produces, among other products, phthalic anhydride via the partial oxidation of oxylene in a fixedbed catalytic reactor. Phthalic anhydride is a principal commercial form of phthalic acid. Phthalic anhydride production pdf phthalic anhydride pan production in the united states in 1972 was 0. Consumption of phthalic anhydride for unsaturated polyester resin production is expected to increase moderately in 201823, but growth also varies by region.
Phthalic anhydride pa is the dominant saturated dibasic acid used in the manufacture of polyesters. Jun 07, 2017 phthalic anhydride is used to manufacture materials such as artificial resins. Scribd is the worlds largest social reading and publishing site. Simulation and optimization of the production of phthalic anhydride. Phthalic anhydride is an important starting product in the manufacture of various phthalic acid derivatives, including esters, phthalimide, and phthalonitrile. Phthalic anhydride appears as a colorless to white lustrous solid in the form of needles with a mild distinctive odor. Basf offers over 5 years experience in phthalic anhydride pa production and 110 years in catalyst research. A novel route to produce phthalic anhydride by oxidation of. Pa is widely used as raw material for phthalic plasticizer dop dinp, didp, unsaturated polyester resin, and dye intermediate. Table i 29 compares the costs of phthalic anhydride produced from naphthalene in both fixed and fluidized beds with that produced from axylene in a fixed bed reactor. It was the first anhydride of a dicarboxylic acid to be used commercially. Us3720692a production of phthalic anhydride from phthalic.
This statistic shows the production volume of phthalic anhydride in the united states from 1990 to 2018. Unlike most such conversions this happens with ease due to the formation of a 5membered ring. Isophthalic acid and trimellitic anhydride are made from m. In pan production using oxylene as the basic feedstock, filtered air is. Dust, as well as vapours of phthalic anhydride, together with the air form explosive mixtures.
Its most important application is the production of plasticizers. Phthalic anhydride pa is used as the major ingredient in the manufacture of plasticizers, unsaturated polyester resin, paint and others. Phthalic acid is introduced into the melt, and an azeotropic mixture of water and azeotroping agent is withdrawn therefrom. Phthalic anhydride is the cyclic dicarboxylic anhydride that is the anhydride of phthalic acid. Phthalic anhydride production in the united states. A process according to claim 2, wherein the azeotroping agent is a member selected from the group consisting of benzene, toluene, ethylbenzene, diethylbenzene, cumene, diisopropylbenzene, oxylene, mxylene, p. Industrial process economics reports about phthalic anhydride phthalic anhydride is the commercial form of phthalic acid. Cdc niosh pocket guide to chemical hazards phthalic anhydride. Oxidation of orthoxylene to phthalic anhydride using a. The present technical description has the purpose to inform the clients on the quality of our product. Phthalic anhydride article about phthalic anhydride by the. The compounds chemical formula is c6h4co2o and is the acid anhydride of phthalic acid. For this reason, the nature and quantity of catalyst used and temperature control in the reactor arise as relevant factors to consider in order to reach the required selectivity towards the final product.
Improving the production of phthalic anhydride from industrialgrade. Moderately toxic by inhalation or ingestion and a skin irritant. Phthalic acids and other benzenepolycarboxylic acids park. Furan and maleic anhydride were converted to phthalic anhydride in two reaction steps. The first commercial process for ma production was put into use by national aniline and chemical in 1928. Phthalic anhydride an overview sciencedirect topics. It has a role as a crosslinking reagent and an allergen. Phthalic anhydride is usually used as a chemical median for the production of plastics from vinyl chloride.
Alternative process in this section, an alternative design of the production of phthalic anhydride from xylene is provided. Manufacturing of phthalic anhydride free download as powerpoint presentation. The other significant applications of phthalic anhydride include unsaturated polyester resins upr, alkyd resins, pigments and dyes among others. Paphthalic anhydride introduction pa is white crystallike flakes at room temperature and transforms into clear colorless liquid at melting point.