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Method of preparing cumyl alcohol and method of preparing phenol, acetone and alpha-methyl styrene

A technology of methyl styrene and cumene, which is applied in the preparation of acetone and α-methyl styrene, and the field of preparation of phenol and cumene, can solve deficiencies, increase the output of α-methyl styrene, etc. problems, to ensure stability, reduce the risk of explosion, and increase the conversion rate

Active Publication Date: 2014-02-05
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Alternatively, considering α-methylstyrene as a by-product of the phenol production process, trying to minimize the production of α-methylstyrene (US Pat. yield research

Method used

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  • Method of preparing cumyl alcohol and method of preparing phenol, acetone and alpha-methyl styrene
  • Method of preparing cumyl alcohol and method of preparing phenol, acetone and alpha-methyl styrene
  • Method of preparing cumyl alcohol and method of preparing phenol, acetone and alpha-methyl styrene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0134] Pd-Co / C is filled as a catalyst in the hydrogenation reactor, hydrogen gas is injected, and the internal temperature is maintained to carry out the reaction. A stream of cumene hydroperoxide having a concentration of 25% by weight was injected as a reactant from the bottom-up of the reactor using a booster pump. The hydrogenation reaction was carried out by injecting 150 g of a stream of cumene hydroperoxide (CHP) at a concentration of 25% by weight and 1 g of a Pd—Co / C catalyst with a weight ratio of Pd:Co of 1:1. Also, the molar ratio of cumene hydroperoxide flow and injected hydrogen was maintained at 1:8. The reaction was carried out for three hours.

Embodiment 2 to 5

[0136] Except using the Pd-Co / C catalyst which changed the weight ratio of Pd:Co, it is the same as Example 1. The weight ratio of Pd:Co is shown in Table 1 below.

[0137]

[0138]

Embodiment 6

[0140] according to figure 2 The process flow diagram shown produces phenol, acetone and alpha-methylstyrene.

[0141] First, three oxidation reactors were used in the phenol process, and the oxidation of cumene using an oxidizing agent was carried out under the following conditions to prepare cumene hydroperoxide (CHP) containing cumene hydroperoxide (CHP) at a concentration of 25% by weight. of cumene hydroperoxide stream.

[0142] (1) Conditions for putting in the first oxidizer

[0143] Supply (CHP0.4% + cumene 99.6%) 1ml / min, O 2 : 100ml / min, pressure: 3bar, reaction temperature: 100℃

[0144] (2) Conditions for adding the second oxidizer

[0145] Supply (CHP8.42% + cumene 91.58%) 1ml / min, O 2 : 100ml / min, pressure: 3bar, reaction temperature: 96℃

[0146] (3) Conditions for adding the third oxidizer

[0147] Supply (CHP16.27% + cumene 83.73%) 1ml / min, O 2 : 100ml / min, pressure: 3bar, reaction temperature: 94℃

[0148] At this point, the concentration of the CHP...

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Abstract

The present invention relates to a method of preparing cumyl alcohol and a method of preparing phenol, acetone and alpha methyl styrene. According to the present invention, through a hydrogenation process for cumene hydroperoxide obtained by oxidizing cumene in a phenol preparing process, selectivity may be improved and the amount of cumyl alcohol may be increased. In addition, the amount of the alpha methyl styrene may be selectively increased. Further, the produced amount of the alpha methyl styrene may be controlled according to market demand by controlling the amount of the cumene hydroperoxide.

Description

[0001] This application claims priority to Korean Patent Applications No. 10-2011-0070516 and No. 10-2011-0073166 filed with the Korean Intellectual Property Office on July 15, 2011 and July 22, 2011, the entire contents of which are contained in In this application. technical field [0002] The present invention relates to a kind of preparation method of cumyl alcohol and the preparation method of phenol, acetone and α-methylstyrene, more specifically relate to the isopropanol which can selectively increase the output of α-methylstyrene without reducing the output of phenol The preparation method of propanol and the preparation method of phenol, acetone and α-methylstyrene. Background technique [0003] Alpha-methyl styrene (alpha-methyl styrene) is often used as an additive in the preparation of certain copolymers and new polymers such as ABS. Moreover, α-methylstyrene is used as an intermediate for the preparation of micro-compounds such as unsaturated α-methylstyrene di...

Claims

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Application Information

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IPC IPC(8): C07C37/08C07C39/04C07C49/08C07C15/46B01J23/44B01J23/75
CPCC07C45/53C07C2523/89C07C1/24C07C2523/44B01J21/18B01J23/8913C07C29/15C07C37/08C07C2523/75Y02P20/52C07C33/20C07C49/08C07C39/04C07C15/46C07C29/132
Inventor 河丞柏俞锡俊曹东铉李泰喆
Owner LG CHEM LTD
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