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A kind of production technology of aliphatic water reducing agent

An aliphatic water reducer and production process technology, applied in the production process field of aliphatic water reducer, can solve the problems of increasing production cost, waste, pollution, etc., achieve cost saving, facilitate recycling, and reduce production cost Effect

Active Publication Date: 2019-10-29
ZHEJIANG JISHENG CHEM BUILDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In addition to aliphatic water reducers, MF dispersants, as a kind of naphthalene water reducers, are also widely used. During the production process of MF dispersants, tail gas will be generated. The tail gas includes formaldehyde, sulfur dioxide, etc., and the tail gas emissions will cause pollution. Sodium sulfite is generated after the tail gas is absorbed, and the treatment of the tail gas absorption liquid increases the production cost. The tail gas absorption liquid contains sodium sulfite, the purchase cost of sodium sulfite is high, and direct treatment causes waste

Method used

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  • A kind of production technology of aliphatic water reducing agent
  • A kind of production technology of aliphatic water reducing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of production technology of aliphatic water reducing agent is characterized in that comprising the following steps:

[0039] (A) Heating and concentrating the tail gas absorbing liquid in the production process of the MF dispersant in the concentration reaction tank 1, concentrating until sodium sulfite accounts for a solution mass percentage greater than 15%, and obtaining the concentrated tail gas absorption liquid, and the concentration reaction tank 1 is provided with a vacuum distillation device 9;

[0040] (B) Add formaldehyde and sodium sulfite into the stirring tank, and add the concentrated tail gas absorption liquid in (A) into the stirring tank, the mass ratio of formaldehyde, sodium sulfite and concentrated tail gas absorption liquid is: 10:1.5~2.5:10~16.7 to obtain mixture;

[0041] (C) Add acetone, liquid caustic soda and water in the reactor, heat up to 55~63°C, keep warm and add the mixture obtained in step (B) dropwise to the reactor;

[0042] ...

Embodiment 2

[0046] Example 2: A production process of an aliphatic water reducer, the difference from Example 1 is that in step (C), the temperature is raised to 55-60°C.

Embodiment 3

[0047] Example 3: A production process of an aliphatic water reducer, the difference from Example 1 is that in step (C), the temperature is raised to 60~63°C.

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Abstract

The invention discloses a production technology of an aliphatic water reducer. The production technology solves the problems of inconvenient treatment of tail gas absorption liquid and environmental damage due to random emission in a production process of an MF dispersing agent. The production technology has the characteristics that the purposes of using the tail gas absorption liquid for production to lower the cost, recycle the tail gas absorption liquid and reduce waste emission by condensing and recycling the tail gas absorption liquid are achieved.

Description

technical field [0001] The invention relates to a production process of a water reducer, more specifically, it relates to a production process of an aliphatic water reducer. Background technique [0002] High-efficiency water reducer is one of the main raw materials for producing high-strength and high-performance concrete. At present, in the domestic market, in addition to naphthalene-based superplasticizers, there are also melamine resin superplasticizers, sulfamic acid superplasticizers and aliphatic superplasticizers, among which aliphatic superplasticizers are It is one of the most important non-naphthalene water reducers. The raw materials for the production of aliphatic water reducers include formaldehyde and sodium sulfite. [0003] In addition to aliphatic water reducers, MF dispersants, as a kind of naphthalene-based water reducers, are also widely used. During the production process of MF dispersants, tail gas will be generated. The tail gas includes formaldehyde...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G16/02C04B24/16C04B103/30
Inventor 金瑞浩徐伟耿标
Owner ZHEJIANG JISHENG CHEM BUILDING MATERIALS