Treating method and treating device for ketene dimer production residues

A technology of diketene and treatment method, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., to achieve the effects of saving time, eliminating potential safety hazards, and effectively recycling

Active Publication Date: 2013-05-22
ANHUI JINGHE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the defects of the low intermittent production efficiency of the hydrolysis process and the ineffective recovery of acetone in the prior art, and propose a treatment method for diketene production residues and device

Method used

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  • Treating method and treating device for ketene dimer production residues
  • Treating method and treating device for ketene dimer production residues

Examples

Experimental program
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Effect test

Embodiment 1

[0028] When the residue diluent is normal, first put 900kg of dilute acetic acid (content 45%-55%) into the forward hydrolysis kettle, and heat up the steam in the hydrolysis kettle before starting to open, and the steam pressure is controlled at 0.2MPa. When you see reflux in the reflux sight glass (temperature 80°C-95°C), turn off the steam and start to slowly add the residue diluent (1.8t). When dropping, the pressure of the front hydrolysis tank is controlled at 2-5KPa, and the dropping time is controlled at about 2h. After the dropwise addition, keep warm for 30-60 minutes, and keep the kettle temperature at 90-95°C to make it fully react. At this time, the temperature at the inlet of the plate changer is controlled at 56°C-65°C. This is the time for acetone to be produced, and the discharge will be seen in the sight glass on the top of the acetone receiving tank. The resulting acetone content is about 60%-80%.

[0029] After the heat preservation is over, pull the nega...

Embodiment 2

[0032] If there is a large amount of residue dilution liquid, put 1000kg of dilute acetic acid (content 45%-55%) into the hydrolysis kettle first, and heat the steam to raise the temperature of the hydrolysis kettle before starting to open, and the steam pressure is controlled at 0.2MPa. When you see reflux in the reflux sight glass (temperature 80°C-95°C), turn off the steam and start to slowly add the residue diluent (2t). When dropping, the pressure of the front hydrolysis tank is controlled at 2-8KPa, and the dropping time is controlled at about 2h. After the dropwise addition, keep warm for 1h. Keep the kettle temperature at 90-95°C to make it fully react. At this time, the temperature at the inlet of the plate changer is controlled at 56°C-65°C. This is the time for acetone to be produced, and the discharge will be seen in the sight glass on the top of the acetone receiving tank. The resulting acetone content is about 60%-80%.

[0033] After the heat preservation is o...

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Abstract

The invention relates to a treating method and a treating device of ketene dimer production residues. Two serially connected front hydrolysis kettle and back hydrolysis kettle are arranged; the front hydrolysis kettle is connected with a vertical water cooling heat exchanger, and the vertical water cooling heat exchanger is sequentially connected with a shallow cooling plate heat exchanger, a gas-liquid separator, an acetone receiving tank and an acetone storage tank; the back hydrolysis kettle is connected with a hydrolysis packed tower, and the hydrolysis packed tower is sequentially connected with a condenser, a cooler, the gas-liquid separator and a hydrolytic acid receiving tank. The front hydrolysis kettle is used for performing three steps of dripping olefine acid and residue diluent, heating and preserving heat; and the back hydrolysis kettle is used for performing three steps of normal pressure discharging, negative pressure discharging and extracting dense residues. The treating method and the treating device provided by the invention have the advantages of 1. conversion from discontinuous production to semi-continuous production and strong treating capability; 2. flexible and varied operation method and capability timely processing emergency and eliminating the potential safety hazard of the traditional technique; and 3. capability of reducing environmental pollution and improving the product recovery.

Description

Technical field: [0001] The invention relates to a production method of diketene, in particular to a method and a device for hydrolyzing diketene residue and pumped liquid produced during the production of diketene. Background technique: [0002] like figure 1 As shown, in the diketene production process, the residue after the rectification process and the liquid after the pump are mixed at a ratio of 2:1 to form a residue dilution liquid, and the residue dilution liquid is sent to the hydrolysis section for hydrolysis, and dilute acid is heated in the hydrolysis tank to form a reflux , and then add the residue diluent dropwise to carry out the hydrolysis reaction. Among them, diketene reacts with acetic acid to generate acetic anhydride, acetone and carbon dioxide; acetic anhydride reacts with water to generate acetic acid, and the final products are acetone and acetic acid, which discharge unprocessable solid residues and use them as solid fuels. [0003] There is onl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C27/00C07C49/08C07C45/57C07C53/08C07C51/087
Inventor 陶长文姜维强
Owner ANHUI JINGHE IND
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