公开(公告)号：US3683018A

公开(公告)日：1972-08-08

申请号：US3683018D

申请日：1969-05-26

Applicant: STANDARD OIL CO

Inventor： LONGLAND GEORGE M JR

IPC: C07C51/265 ,  C07C51/43 ,  C07C51/42 ,  C07C51/44 ,  C07C63/02

CPC classification number: C07C51/43 ,  C07C51/265 ,  C07C63/24 ,  C07C63/26

Abstract: Liquid phase oxidation of isomeric xylene mixture with molecular oxygen-containing gas (e.g. air or oxygen gas) in the presence of aqueous or acetic acid reaction media and catalysis provided by one or more heavy metals (metals of about 50 to about 200 atomic weight) or by a side-chain oxidation initiator or promotor (bromine source, or acetaldehyde or methylenic ketone) provides oxidation effluent containing mixture of isomeric phthalic acids for product crystallization and reaction media displacement from concentrate of said effluent by contact of the concentrate with water in a single step, preferably conducted with a vertical column of water, thereby producing aqueous acetic acid for feed to acetic acid recovery and recycle to oxidation and aqueous slurry of mixture of isomeric phthalic acids as feed for separation into individual phthalic acid isomer products. Isoand tere-phthalic acids in particular are separated from mixtures of the same by crystal size classification.

Abstract translation: 在含水或乙酸反应介质和由一种或多种重金属（约50至约200原子量的金属）提供的催化作用的情况下，使用含分子氧气体（例如空气或氧气）的异构二甲苯混合物进行液相氧化， 或通过侧链氧化引发剂或促进剂（溴源或乙醛或亚甲基酮）提供含有异构邻苯二甲酸混合物的氧化流出物，用于产物结晶，并且通过将浓缩物与水接触，从所述流出物的浓缩物中移出反应介质 单步，优选用垂直的水柱进行，从而产生乙酸水溶液用于进料至乙酸回收并循环至氧化，并将异构邻苯二甲酸的混合物的含水浆液作为进料分离成单独的邻苯二甲酸异构体产物。 异 - 邻苯二甲酸特别是通过晶体尺寸分类从其混合物中分离出来。

公开(公告)号：US3629321A

公开(公告)日：1971-12-21

申请号：US3629321D

申请日：1969-05-26

Applicant: STANDARD OIL CO

Inventor： LONGLAND GEORGE M JR

IPC: C07C51/265 ,  C07C67/08 ,  C07C69/82

CPC classification number: C07C51/265 ,  C07C67/08 ,  C07C63/26 ,  C07C69/82

Abstract: LIQUID PHASE OXIDATION OF P-XYLENE WITH MOLECULAR OXYGEN-CONTAINING GAS (E.G., AIR OR COMMERCIAL OXYGEN) IN PRESENC OF ACETIC ACID PRODUCES FLUID OXIDATION EFFLUENT WHICH IS SUBJECTED FIRST TO SIMULTANEOUS TEREPHTHALIC ACID CRYSTALLIZATION AND ACETIC ACID DISPLACEMENT BY CONTACT WITH A COUNTERCURRENT FLOW OF WATER AND SECOND TO SIMULTANEOUS WATER DISPLACEMENT BY AND TEREPHTHALIC SLURRY FORMATION IN METHANOL BY ITS COUNTERCURRENT CONTACT WITH THE FIRST FORMED SLURRY OF TEREPHTHALIC ACID IN WATER FROM ACETIC ACID DISPLACEMENT. THIS PROVIDES A SLURRY OF TEREPHTHALIC ACID IN METHANOL AS FEED TO ESTERIFICATION FROM WHICH A LIQUID ESTERIFICATION EFFLUENT IS SUBJECTED TO SIMULTANEOUS DMT CRYSTALLIZATION AND METHANOL MOTHER LIQUOR DISPLACEMENT BY COUNTERCURRENT CONTACT WITH COOLER FRESH METHANOL THEREBY PRODUCING A SLURRY OF PRECIPITATED DMT IN FRESH METHANOL.