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Energy-saving production method of pentaerythritol

A pentaerythritol, production method technology, applied in chemical instruments and methods, separation/purification of hydroxy compounds, sustainable manufacturing/processing, etc., can solve problems such as side reactions, consumption, pentaerythritol product quality decline, etc.

Active Publication Date: 2016-06-22
INNER MONGOLIA YIHUA CHEMICAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] When above main reaction takes place, also can have the generation of side reaction, side reaction has both consumed raw material, makes the yield and consumption of pentaerythritol increase, also can make the product quality of pentaerythritol decline, therefore, after condensation makes pentaerythritol product , it is also necessary to refine and purify the product to obtain high-purity pentaerythritol

Method used

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Embodiment

[0036] See figure 1 As shown, a kind of pentaerythritol energy-saving production method provided in this embodiment, the specific structure of the production system that it adopts is: comprise condensation reactor 1, be provided with condensation liquid tank 2, microporous filter 3, Preheating plate cold 4, condensation liquid pre-dealdehyde tower 8, after the condensation liquid pre-dealdehyde tower 8 is provided with a de-aldehyde tower 13, the de-alcohol tower 13 is connected with the de-alcoholization tower 9 through pipelines, after the de-alcoholization tower 13, an evaporation tower 13 is arranged. device 18, a crystallization tank 16 is arranged after the evaporator 18, and the secondary steam outlet of the de-alcoholization tower 13 tower top is respectively connected with the steam inlet of the dealcoholization tower reboiler 10, the steam inlet of the evaporator 18, and condensation through the secondary steam delivery pipeline. The steam inlet of the liquid pre-deald...

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Abstract

The invention belongs to the technical field of production of pentaerythritol, and in particular discloses an energy-saving production method of pentaerythritol. The energy-saving production method of pentaerythritol comprises the following steps: obtaining secondary steam containing alcohol aldehyde and heat at tower top of a dealdehyding tower by using an energy gradient utilization concept, and carrying out gradient utilization of the secondary steam to a dealcoholization tower, an evaporator and a concentrated solution pre-dealdehyding tower to realize the aim of heating the dealcoholization tower, the evaporator, and the concentrated solution pre-dealdehyding tower by using the secondary steam at the tower roof of the dealdehyding tower, so that the energy source is comprehensively utilized; and recycling waste heat so as to heat the to-be-heated material, adding a dealcoholization tower gas phase heat exchanger, a dilute formaldehyde heat exchanger and an alcohol-containing dilute formaldehyde heat exchanger before entering the concentrated solution pre-dealdehyding tower, and increasing the feeding temperature of the concentrated solution pre-dealdehyding tower to 90 DEG C from 60 DEG C through the improvement. The energy-saving production method of pentaerythritol, provided by the invention, realizes one energy source with multiple purposes through series utilization according to the energy grade, the energy source is comprehensively utilized, and thus the energy-saving production of pentaerythritol is finally realized.

Description

technical field [0001] The invention relates to the technical field of pentaerythritol production, in particular to an energy-saving production method of pentaerythritol. Background technique [0002] Pentaerythritol, referred to as PE, is one of the important chemical raw materials. It can be used to make alkyd resins, printing inks, explosives, high-temperature lubricants, plasticizers, surfactants and chlorinated polyether advanced engineering plastics. [0003] At present, the industrial production of pentaerythritol mainly uses formaldehyde and acetaldehyde under the action of alkali metal or alkaline earth metal hydroxide to catalyze condensation and Connizzaro reaction to generate pentaerythritol and formate. The reaction equation of the reaction process is as follows: [0004] [0005] [0006] When above main reaction takes place, also can have the generation of side reaction, side reaction has both consumed raw material, makes the yield and consumption of pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/38C07C29/74C07C31/24
CPCC07C29/38C07C29/74C07C31/24Y02P20/10
Inventor 卞平官何千稳王中华杨勇刘小平白云牛敬宗李进华
Owner INNER MONGOLIA YIHUA CHEMICAL CO LTD
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