{"id":7315,"date":"2022-04-11T15:45:25","date_gmt":"2022-04-11T12:15:25","guid":{"rendered":"https:\/\/gamma-co.ir\/en\/?page_id=7315"},"modified":"2022-04-11T15:45:25","modified_gmt":"2022-04-11T12:15:25","slug":"xylene","status":"publish","type":"page","link":"https:\/\/gamma-co.ir\/en\/xylene\/","title":{"rendered":"Xylene"},"content":{"rendered":"

Xylene<\/strong>\u00a0or\u00a0dimethylbenzene\u00a0is any one of three\u00a0isomers<\/a>\u00a0of dimethylbenzene, or a combination thereof. With the formula (CH3<\/sub>)2<\/sub>C6<\/sub>H4<\/sub>, each of the three compounds has a central\u00a0benzene<\/a>\u00a0ring with two\u00a0methyl groups<\/a>\u00a0attached at\u00a0substituents<\/a>. They are all colorless, flammable liquids, some of which are of great industrial value. The mixture is referred to as both xylene and, more precisely, xylenes.<\/p>\n

 <\/p>\n

\"\"<\/strong><\/p>\n

Isomers<\/strong><\/p>\n

Xylene<\/strong> exists in three isomeric forms. The isomers can be distinguished by the\u00a0designations<\/a>\u00a0ortho- (o-),\u00a0meta- (m-) and\u00a0para- (p-), which specify to which\u00a0carbon<\/a>\u00a0atoms (of the\u00a0benzene ring<\/a>) the two\u00a0methyl groups<\/a>\u00a0are attached. By counting the carbon\u00a0atoms<\/a>\u00a0around the ring starting from one of the ring carbons bonded to a methyl group, and counting towards the second methyl group, the\u00a0o-isomer<\/a>\u00a0has the\u00a0IUPAC name<\/a>\u00a0of 1,2-dimethylbenzene, the\u00a0m-isomer<\/a>\u00a0is 1,3-dimethylbenzene and the\u00a0p-isomer<\/a>\u00a0is 1,4-dimethylbenzene. Of the three isomers, the\u00a0p-isomer is the most industrially sought after since it can be oxidized to\u00a0terephthalic acid<\/a>.<\/p>\n

 <\/p>\n

Production<\/strong><\/p>\n

Xylenes are produced by the\u00a0methylation<\/a>\u00a0of\u00a0toluene<\/a>\u00a0and\u00a0benzene<\/a>.\u00a0Commercial or\u00a0laboratory-grade<\/a>\u00a0xylene produced usually contains about 40-65% of\u00a0m-xylene<\/a>\u00a0and up to 20% each of\u00a0o-xylene<\/a>,\u00a0p-xylene<\/a>\u00a0and\u00a0ethylbenzene<\/a>. ]<\/a>\u00a0The ratio of isomers can be shifted to favor the highly valued\u00a0p-xylene via the patented UOP-Isomar\u00a0process[8]<\/a>\u00a0or by\u00a0transalkylation<\/a>\u00a0of xylene with itself or trimethylbenzene. These conversions are catalyzed by\u00a0zeolites<\/a> .<\/p>\n

ZSM-5<\/a>\u00a0is used to facilitate some isomerization reactions leading to mass production of modern plastics.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Item<\/td>\nTest Method<\/td>\nSales Spec.<\/td>\n<\/tr>\n<\/thead>\n
Appearance<\/td>\nVisual<\/td>\nClear<\/td>\n<\/tr>\n
Sp-gr, 15.56 \u2103\/15.56 \u2103<\/td>\nASTM D-4052<\/td>\n0.86500-0.8750<\/td>\n<\/tr>\n
Color Pt\/Co<\/td>\nASTM D-1209<\/td>\nMax 20<\/td>\n<\/tr>\n
Acid Wash Color<\/td>\nASTM D-848<\/td>\nMax 2<\/td>\n<\/tr>\n
Sulfur Compounds<\/td>\nASTM D-853<\/td>\nFree of H2S\/So2<\/td>\n<\/tr>\n
Cooper Corrosion<\/td>\nASTM D-849<\/td>\nPass<\/td>\n<\/tr>\n
Bromi neIndex,mg\/100g<\/td>\nASTM D-1491<\/td>\nMax 20<\/td>\n<\/tr>\n
Acidity<\/td>\nASTM D-847<\/td>\nNo Free Acid<\/td>\n<\/tr>\n
Non-Aromatics,VOl%<\/td>\nASTM D-2360<\/td>\nMax 2.0<\/td>\n<\/tr>\n
C9+Aromatics,Vol%<\/td>\nASTM D-2267<\/td>\nMax 1.0<\/td>\n<\/tr>\n
Range of Distillation, \u2103<\/td>\nASTM D-850<\/td>\n139.3\u00b15.0<\/td>\n<\/tr>\n
Recovery,%<\/td>\nASTM D-850<\/td>\nMin 98.0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Gamma Development Co.<\/strong> offers the most completive prices for this product. For receiving a quote please sends us your inquiry along with the LOI\u00a0 to our email :
\nexport (@) gamma-co (.)\u00a0 ir<\/strong><\/p>\n

\u00a0<\/strong><\/p>\n

\u00a0<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Xylene\u00a0or\u00a0dimethylbenzene\u00a0is any one of three\u00a0isomers\u00a0of dimethylbenzene, or a combination thereof. With the formula (CH3)2C6H4, each of the three compounds has a central\u00a0benzene\u00a0ring with two\u00a0methyl groups\u00a0attached at\u00a0substituents. They are all colorless, flammable liquids, some of which are of great industrial value. The mixture is referred to as both xylene and, more precisely, xylenes.   Isomers Xylene…<\/p>\n","protected":false},"author":9,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"_links":{"self":[{"href":"https:\/\/gamma-co.ir\/en\/wp-json\/wp\/v2\/pages\/7315"}],"collection":[{"href":"https:\/\/gamma-co.ir\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/gamma-co.ir\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/gamma-co.ir\/en\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/gamma-co.ir\/en\/wp-json\/wp\/v2\/comments?post=7315"}],"version-history":[{"count":1,"href":"https:\/\/gamma-co.ir\/en\/wp-json\/wp\/v2\/pages\/7315\/revisions"}],"predecessor-version":[{"id":7318,"href":"https:\/\/gamma-co.ir\/en\/wp-json\/wp\/v2\/pages\/7315\/revisions\/7318"}],"wp:attachment":[{"href":"https:\/\/gamma-co.ir\/en\/wp-json\/wp\/v2\/media?parent=7315"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}