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N-propyl acetate energy-saving process and process equipment

A technology of n-propyl acetate and process equipment, which is applied in the chemical industry and can solve the problems of excessive heat, steam consumption and no competitive advantage

Pending Publication Date: 2020-10-23
ZHEJIANG JIANYE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above-mentioned rectification method needs to consume more heat, and has no competitive advantage in terms of steam consumption

Method used

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  • N-propyl acetate energy-saving process and process equipment

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Embodiment Construction

[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] Such as figure 1 As shown, the present embodiment discloses a technique and equipment for an energy-saving n-propyl acetate process. The equipment mainly includes a rectification reboiler E1 and a rectification tower T1. The liquid phase outlet at the bottom of the rectification tower T1 is connected with a The finished product extraction pump P1 for the liquid phase extraction of the finished ester at the bottom of the tower is connected to the finished product tanks V1 and V2 through the heat exchanger E3 and the finished product condenser E4 in turn; the gas phase outlet at the top of the rectifying tower T1 is connected to the tower The top condenser E2 and the top condenser E2 are connected to the phase separation inlet at the top of the phase separator V3, and the phase separation outlet at the bottom of the phase separat...

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Abstract

The invention provides an n-propyl acetate energy-saving process and process equipment. The equipment comprises a rectifying column, wherein a liquid phase outlet of the rectifying column is connectedwith a finished product extraction pump, the finished product extraction pump is connected to a finished product tank, a gas phase outlet of the rectifying column is connected to a tower top condenser, the column top condenser is connected to a phase splitter, and a split phase outlet of the phase splitter is connected to external extraction equipment and a reflux inlet of the rectifying column.Gas-phase extraction of finished ester is improved into liquid-phase extraction, so that latent heat of vaporization of the finished ester is saved; finished ester exchanges heat with a backflow component flowing back to the rectifying column from the phase splitter and then is conveyed to the finished product tank, so that sensible heat of the finished ester is fully utilized, energy is effectively saved, and consumption is reduced.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a n-propyl acetate energy-saving process and process equipment. Background technique [0002] N-propyl acetate, also known as n-propyl acetate, is a commonly used fine chemical raw material. It has good solubility for many synthetic resins. An excellent solvent for synthetic resins. [0003] The production process of n-propyl acetate is that acetic acid and n-propanol are added into the esterification kettle, and n-propyl acetate is generated under the action of a sulfuric acid catalyst. The final reaction liquid contains n-propyl acetate, acetic acid, n-propanol and water, so it is necessary to The purification process includes a deacidification step and a rectification step. The deacidification step is carried out in the esterification tower, and the rectification step is carried out in the rectification tower. After the acetic acid is removed in the este...

Claims

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Application Information

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IPC IPC(8): C07C67/48C07C67/54C07C69/14B01D3/14B01D3/32
CPCC07C67/48C07C67/54B01D3/14B01D3/007B01D3/32C07C69/14Y02P20/50Y02P20/10
Inventor 冯烈吴方丽陈云斌李东张华建谈敦玲王爱艳刘小兵
Owner ZHEJIANG JIANYE CHEM
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