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Method for producing hydroxy compound

一种羟基化合物、制造方法的技术，应用在有机化合物的制备、化学仪器和方法、有机化学等方向，能够解决苯损耗、很难、得不到稳定性能等问题，达到有效循环利用的效果

Inactive Publication Date: 2007-09-12
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, in the oxychlorination method (see, for example, JP-A-53-9723), since hydrogen chloride, oxygen, and benzene coexist at a high temperature above 200° C., loss due to combustion of benzene easily occurs, and dioxin is also produced. class possibility
In addition, the method of carrying out oxychlorination at a low temperature below 200° C. is also disclosed (see, for example, Japanese Patent Publication No. 45-28366 and Japanese Patent Publication No. 50-34011), but it is difficult to say that it is an effective method for the following reasons. Method: expensive precious metal catalyst is necessary, sometimes biphenyl and other by-products that are not easy to be reused are generated, dioxin may still be generated, and stable performance cannot be obtained

Method used

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  • Method for producing hydroxy compound
  • Method for producing hydroxy compound

Examples

Experimental program
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Embodiment 1

[0069] When the present invention uses benzene as the hydrocarbon to obtain the hydroxy compound phenol, it can be implemented by the flow chart in FIG. 1 and the material balance shown in Table 1, for example.

[0070] Benzene (fluid number 2) and chlorine (fluid number 4) are supplied to the chlorination step (A), and a catalyst is used to generate monochlorobenzene and hydrogen chloride through a chlorination reaction to obtain a reaction solution containing monochlorobenzene and unreacted benzene (fluid number 6) and hydrogen chloride-based gas (fluid number 5). The obtained reaction solution and gas mainly composed of hydrogen chloride are supplied to the chlorinated hydrocarbon purification step (D), and are separated by distillation into crude hydrogen chloride gas (fluid number 7) containing benzene and monochlorobenzene, and a fraction mainly composed of benzene (fluid number 7). No. 8), a fraction mainly composed of monochlorobenzene (fluid No. 9), and a fraction mai...

reference example 1

[0075]

[0076] The monochlorobenzene conversion and phenol selectivity in Reference Example 1 are defined as follows.

[0077] Chlorobenzene conversion rate (%)=(the molar number of reacted monochlorobenzene) / (the molar number of supplied monochlorobenzene)×100

[0078] Phenol selectivity (%)=(moles of phenol produced) / (moles of chlorobenzene reacted)×100

[0079] Benzene selectivity (%)=(moles of benzene produced) / (moles of monochlorobenzene reacted)×100

[0080] 10.0 g of commercially available copper chloride dihydrate (99.9% by weight PUA manufactured by Wako) was stirred and dissolved in 40 ml of ion-exchanged water to prepare an aqueous copper chloride solution. 20.0 g of commercially available H-ZSM-5 zeolite (manufactured by N.E. Chemkitatsuto, Si / Al=151.6 mmφ extruded product) was added to this copper chloride aqueous solution, and it was immersed in a stirrer for 8 hours to perform ion exchange. The solid content was filtered, washed with ion-exchanged water, dr...

Embodiment 2

[0084]In the present invention, hydrochloric acid is used as one of the raw materials in the hydrolysis step, and when the hydrolysis step, the hydrochloric acid separation step, the hydrogen chloride separation step, and the hydroxyl compound production step are carried out, for example, the flow chart in FIG. 2 and the material balance in Table 2 can be used. be well implemented.

[0085] Monochlorobenzene (fluid number 54) and hydrochloric acid (fluid number 52, hydrogen chloride concentration 19.4% by weight) were supplied to the hydrolysis step (L), and after heating and vaporizing, monochlorobenzene was allowed to dissolve in a reactor filled with a copper-loaded zeolite catalyst. Reacts with water to produce phenol and hydrogen chloride. At this time, benzene is produced by a side reaction.

[0086] The resulting reaction mixture containing phenol, hydrogen chloride, benzene and unreacted chlorobenzene and water (fluid number 55) is supplied to the hydrochloric acid se...

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Abstract

Disclosed is a method for producing a hydroxy compound comprising the following steps. Chlorination step: a step for obtaining chlorinated hydrocarbon and hydrogen chloride from hydrocarbon and chlorine; Hydrolysis step: a step for obtaining a hydroxy compound and hydrogen chloride from chlorinated hydrocarbon and water; Oxidation step: a step for reacting the hydrogen chloride obtained in the chlorination step and / or hydrolysis step with oxygen for obtaining chlorine and recycling at least a part of the thus-obtained chlorine to the chlorination step.

Description

technical field [0001] The present invention relates to a method for producing hydroxy compounds. In more detail, the present invention relates to a method for producing a hydroxy compound indirectly from hydrocarbons, chlorine and water via chlorinated hydrocarbons, characterized in that it is not accompanied by loss due to hydrocarbon combustion or secondary The generation of fluorine can effectively recycle the by-product hydrogen chloride gas. Background technique [0002] For example, the method for indirectly producing a hydroxy compound such as phenol from a hydrocarbon such as benzene, hydrogen chloride, oxygen and water via monochlorobenzene as a chlorinated hydrocarbon is known as the Raschig process (see, for example, U.S. Patent No. 3221063 number manual). This method uses the oxychlorination method for producing monochlorobenzene, which produces monochlorobenzene by oxychlorination using benzene, hydrogen chloride, and oxygen, hydrolyzes monochlorobenzene to p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C37/02C07C39/04C07C17/12C07C25/06
CPCC07C17/10C07C17/12C07C17/383C07C17/386C07C17/389C07C37/02C07C37/74C07C37/80C07C25/06C07C39/04
Inventor 宇井利明铃田哲也濑尾健男
Owner SUMITOMO CHEM CO LTD
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