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Method for recovering phenol and acetophenone from phenol tar

A technology of acetophenone and phenol tar, which is applied in chemical instruments and methods, preparation of organic compounds, separation/purification of carbonyl compounds, etc., can solve problems such as high equipment maintenance costs, difficult residue handling, and difficult discharging, and achieves The content of heavy components is significantly reduced, the catalytic effect is good, and the effect of reducing maintenance costs

Inactive Publication Date: 2014-06-18
BEIJING UNIV OF CHEM TECH
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Problems solved by technology

However, the viscosity of the final residue of catalytic pyrolysis is higher than that of direct pyrolysis, which makes the final discharge more difficult and the damage to equipment is more obvious.
[0007] In the existing methods for recovering phenol and acetophenone from phenol tar, high-temperature cracking is generally carried out under the action of a catalyst, the final residue is difficult to handle, the damage to the equipment is serious, and the maintenance cost of the equipment is high

Method used

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  • Method for recovering phenol and acetophenone from phenol tar
  • Method for recovering phenol and acetophenone from phenol tar

Examples

Experimental program
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Effect test

Embodiment

[0015] Add a certain amount of phenol tar to the reactor, the added catalyst content is 0.1-2% (based on the mass of phenol tar), and at the same time add about 5-15% of a high-temperature solvent oil (solvent oil with a boiling range above 240°C) (Based on the mass of phenol tar), stir and heat, first raise the temperature to 240-260 ° C for a certain period of time, distill the light components in it, and dissolve the catalyst evenly and thoroughly in the phenol tar, then raise the temperature The catalytic cracking reaction is carried out at a temperature of 320-360°C, and the reaction time is controlled at 1.5-10 hours. The mixture obtained by catalytic cracking was qualitatively and quantitatively analyzed by mass spectrometry, and the experimental results are shown in Table-2.

[0016] In Comparative Examples 1 and 2, the last residue is very viscous to the station of the equipment at 200°C, and apparently has no fluidity, but remains in the reaction equipment in the for...

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Abstract

The invention discloses a method for recovering phenol and acetophenone from phenol tar, and belongs to the technical field of petrochemical engineering. The method comprises the following steps of: adding sulfate serving as a catalyst in the phenol tar, adding high-temperature solvent naphtha in the phenol tar simultaneously, stirring and heating, retaining the reaction for a period of time after the temperature is raised to 240 DEG C to 260 DEG C so as to enable the catalyst to be thoroughly and uniformly dissolved in the phenol tar, performing cracking reaction after the temperature is raised to 300 DEG C to 360 DEG C so as to obtain matters containing useful components such as phenol and acetophenone, wherein the boiling range of the high-temperature solvent naphtha is higher than 240 DEG C. According to the catalytic cracking way of the method, the color of the cracked product is transparent, the content of phenol acetone in the cracked product is high, and the recovery rates of phenol and acetophenone are improved obviously.

Description

technical field [0001] The invention clearly belongs to the technical field of petrochemical industry, relates to the technical application of the by-product phenol tar produced by the cumene method to produce phenol acetone, and particularly relates to the method for recovering phenol and acetophenone from the phenol tar. Background technique [0002] In the process of producing phenol-acetone by cumene method, many by-products will inevitably be produced due to oxidation reaction and decomposition reaction. Phenol tar is the distillation raffinate obtained after separating phenol-acetone from the reaction mixture. From the perspective of the quantity of phenol tar, for every ton of phenol produced, about 100-200kg of phenol tar will be produced. Affected by the rapid growth in demand for phenol downstream products such as bisphenol A and polycarbonate (PC) resin, in recent years, the demand for phenol has grown rapidly, and production has also developed simultaneously. In...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C39/04C07C37/86C07C49/78C07C45/85
Inventor 黄崇品石顺友张杰陈标华
Owner BEIJING UNIV OF CHEM TECH
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