Process for producing 1,3-di-(2-hydroperoxy-2-propyl) benzene
AssigneeSumitomo Chemical Company, Limited
InventorsShigefumi Tokumasu, Hideo Ohki, Toshikazu Ohmae
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Abstract
A process for producing 1,3-di-(2-hydroperoxy-2-propyl)benzene comprising an oxidizing step, an extracting step with an aqueous solution and a recycling step wherein the accumulated equilibrium concentration of 1,3-di-(2-hydroxy-2-propyl)benzene in the circulating oil obtained by an extracting step with an aqueous solution is 4.2% by weight or less. The process enables to avoid inconveniences like occlusion of inside space of an apparatus and failure of detection of measuring machines and allows continuous safe operation.
Claims5
A process for producing 1,3-di-(2-hydroperoxy-2-propyl)benzene comprising the following steps:
- an oxidizing step in which a starting solution containing 1,3-diisopropylbenzene is subjected to an oxidizing reaction to produce an oxidized solution containing 1,3-di-(2-hydroperoxy-2-propyl)benzene and a 1,3-di-(2-hydroxy-2-propyl)benzene by-product,
- an extracting step in which said oxidized solution is subjected to an extraction using an aqueous alkali solution to produce an oily layer containing 1,3-di-(2-hydroxy-2-propyl)benzene and an aqueous layer containing 1,3-di-(2-hydroperoxy-2-propyl)benzene, and
- a recycling step in which at least part of said oily layer is recycled as a circulating oil back to the starting solution;
- further comprising controlling the ratio A/B to 330 or more, wherein A is the weight of the aqueous alkali solution used in the extracting step per unit time and B is the weight of 1,3-di-(2-hydroxy-2-propyl)benzene by-product produced in the oxidizing step and extracting step per unit time, such that the accumulated equilibrium concentration of 1,3-di-(2-hydroxy-2-propyl)benzene in the circulating oil is 3.6% by weight or less, wherein the weight percentage is based on the total weight of the circulating oil.
A process for producing 1,3-di-(2-hydroperoxy-2-propyl)benzene comprising the following steps:
- an oxidizing step in which a starting solution containing 1,3-diisopropylbenzene is subjected to an oxidizing reaction to produce an oxidized solution containing 1,3-di-(2-hydroperoxy-2-propyl)benzene, 3-(2-hydroxy-2-propyl)-1-(2-hydroperoxy-2-propyl)benzene, 3-isopropyl-1-(2-hydroperoxy-2-propyl)benzene, unreacted diisopropylbenzene and a 1,3-di-(2-hydroxy-2-propyl)benzene by-product,
- an extracting step in which said oxidized solution is subjected to an extraction using an aqueous alkali solution to produce an aqueous layer containing 1,3-di-(2-hydroperoxy-2-propyl)benzene, 3-(2-hydroxy-2-propyl)-1-(2-hydroperoxy-2-propyl)benzene and 1,3-di-(2-hydroxy-2hydroxy-2-propyl)benzene, and an oily layer containing 3-isopropyl-1-(2-hydroperoxy-2-propyl)benzene, 1,3-diisopropylbenzene and 1,3-di-(2-hydroxy-2-propyl)benzene, and
- a recycling step in which at least part of said oily layer is recycled as a circulating oil back to the starting solution;
- further comprising controlling the ratio A/B to 330 or more, wherein A is the weight of the aqueous alkali solution used in the extracting step per unit time and B is the weight of 1,3-di-(2-hydroxy-2-propyl)benzene by-product produced in the oxidizing step and extracting step per unit time, such that the accumulated equilibrium concentration of 1,3-di-(2-hydroxy-2-propyl)benzene in the circulating oil is 3.6% by weight or less, wherein the weight percentage is based on the total weight of the circulating oil.
Dependencies are inferred from the claim text.