Processing process for ketene dimer rectification residue

A technology of ketene essence and residue, which is applied in the field of diketene distillation residue treatment process, can solve the problems of waste of resources, high risk factor, inability to effectively recover acetone, etc., and achieve the effect of avoiding pollution and high social value

Active Publication Date: 2009-01-07
安徽天成新材料有限公司
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Problems solved by technology

[0002] The existing treatment method for diketene distillation residue is direct incineration, which has a high risk factor and high pollution, and wastes diketene and acetic anhydride in the recyclables
Patent No. 200610085796.0, the residue is hydrolyzed to effectively recover the active ingredients in

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  • Processing process for ketene dimer rectification residue

Examples

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[0014] The specific implementation of the present invention will be described in detail below in conjunction with the examples:

[0015] (1) Hydrolysis: Add 600kg of 40% acetic acid to a 2000L reactor at a hydrolysis temperature of 95°C. Add 1200kg of diketene distillation residue dropwise, stir to make the mixture uniform, after the dropwise addition is completed, heat it with a jacket for 1 hour. 1200 kg of a 65% acetic acid solution with an acetone content of about 20% was obtained. A cyclone tube condenser is installed on the reactor, and the temperature is cooled with -15°C brine. The tail gas discharged from the reactor is condensed into a condensate to obtain acetone with a purity of 95%.

[0016] (2) Separation: Put the above-mentioned hydrolysate in a continuous distillation tower, maintain the temperature at the top of the tower at 55-57°C, separate the acetone, and obtain about 100 kg of acetone above 95% until there is no obvious discharge.

[0017] (3) Mixing and mixi...

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Abstract

The invention discloses a process for processing diketene rectification residues, which is characterized in that the process comprises the following steps: (1) diluting the diketene rectification residues, hydrolyzing the diluted residues, cooling and recovering the tail gas of the hydrolysis process; (2) recovering acetone in the hydrolytic solution; (3) mixing condensate of the step (1) with acetone recovered in the step (2), mixing with the hydrolytic residues in the step (1) at a ratio and dissolving; and (4) combusting the mixture and emitting without pollution. The process can effectively recover chemical components in the tail gas to prevent the air pollution caused by organic solvents such as acetone, etc. The residues are combusted fully to generate CO2 and water to achieve non-pollution emission, thereby meeting the environmental protection requirements and achieving high social value.

Description

technical field [0001] The invention relates to a treatment process for diketene distillation residue, which belongs to the technical field of chemical industry. Background technique [0002] The existing method for treating diketene distillation residue is direct incineration, which has a high risk factor and great pollution, and wastes diketene and acetic anhydride in the recyclables. Patent No. 200610085796.0, the residue is hydrolyzed to effectively recover the active ingredients in the residue. Although a cooling device is used in the hydrolysis process, acetone cannot be recovered effectively. The volatile acetone is accompanied by the generated CO 2 Discharge together, and the residue after hydrolysis is treated as solid waste, which wastes resources and pollutes the environment. Contents of the invention [0003] In order to overcome the deficiencies of the existing technology, the purpose of this paper is to provide a diketene rectification residue treatment proc...

Claims

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Application Information

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IPC IPC(8): C07C49/08C07C45/78A62D3/38A62D3/35A62D101/20
Inventor 陈正荣陈敏陈正崔惠忠
Owner 安徽天成新材料有限公司
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