TH27953B - Process for recovery of cummine hydroperoxide product disintegration by distillation. - Google Patents

Abstract

DC60 Recovered cumin hydroperoxide (CHP) disintegration product by distillation to remove most by-products of acetal. (Hydroxyacetone) that do not want out of the phenolic stream. By distillation, when most of the acetol receives the upper current containing acetone, cumene and alpha-methyl styrene (AMS), acetal is subsequently separated from the acetic acid. Stone by distillation when acetone is taken as the upper current. And residual acetol and the lower current consists of Qamine, AMS and phenol extracted acetal followed by the fraction. Of phenol from cumene and AMS by flushing the reverse current with alkali hydroxide metal in water. Then distill the phenol stream to separate the phenol from the cubine Alpha-methyl styrene and higher boiling compounds can be made with phenol with a small amount of acetal to eliminate methylbenzofuran by treatment with Acidic resin or solid super acid catalyst without the formation of methyl benzoate. More Furan in significant quantities Recovering the product from cumene hydroperoxide (CHP) by distillation removes most by-products of acetal. (Hydroxyacetone) that do not want out of the phenolic stream. By distillation, when most of the acetol receives the upper currents containing acetone, cumene and alpha methyl styrene (AMS), acetal is subsequently separated from the acetic acid. Stone by distillation when acetone is taken as the upper current. And residual acetol and the lower current consists of Qamine, AMS and phenol extracted acetal followed by the fraction. Of phenol from cumene and AMS by flushing the reverse current with alkali hydroxide metal in water. Then distill the phenol stream to separate the phenol from the cubine Alpha-methyl styrene and higher boiling compounds can be made with phenol with a small amount of acetal to eliminate methylbenzofuran by treatment with Acidic resins or solid superacid catalysts that are free from methyl benzoate. More Furan in significant quantities

Claims (2)

1.Process for recovering products from cumin hydroperoxide cracking The process consists of the steps of: a, entering a stream of natural products from the cumin hydroperoxide breakdown to provide a First distillation And distillation of natural product streams to obtain the above currents, where one contains acetone, cumin, alpha methyl styrene, acetol and phenol 1% or less by weight. And the lower current contains phenol First downstream with methylbenzofuran, alpha-methylstyrene 0.5% or less by weight of acetal 50 parts per million or less by weight and at Required free of cumin; b.First top current feed, put second distillation column and first top current distillation so that The second upper current contains acetone. Cumine and Alpha Methyl Styrene And the stream below that Two contain cubic Alpha-methyl styrene and all the essentials of acetol and phenol from the stream. Above that one; c. The first upper current feed into the third distillation column consists of the reaction area and the second upper current separation and distillation area, while there is the alkali present in the water when removing the currents containing Acetone and its lighter products than acetone leave the top layer of the area to be separated and recycled. New The reaction area to obtain the upper third current consists of acetone and a lower current that Three are composed of cumin and alpha-methyl styrene; And d. The second bottom current input is put on the scrubber when it touches the second lower current with the alkali metal current. Hydroxides in water In the reverse flow to produce an inrush current in phenol-containing water Alkali phenate metal And the acetol is dissolved. And the inrush of organic currents consisting of cubene and Alpha Methyl Styrene When the required organic currents are free of phenol and acetol. 2. The process of claim No. 1, in addition to this includes; a.First down stream feed, put fourth downstream distillation column and first bottom current distillate to get The fourth upper current contains all the necessary and phenols of alpha-methylstyrene and cumene. First downstream The fourth bottom stream contains phenol and products that are heavier than phenol, and one lateral stream contains phenol. Methylbenzofuran and acetol; b. The one side current feeding the bed has an acidic resin or super acid catalyst. Solids at 100 ° C or higher at a rate of 2 beds by volume per hour or less. Than to convert methylbenzofuran and acetal into higher boiling products than phenol;