Method for preparing modified lignosulfonate water reducing agent with acrylic waste water as raw material

A technology of lignosulfonate and acrylic acid, applied in the field of building materials, can solve the problems of low energy consumption, low treatment rate, and secondary pollution of biological methods
CN103588935AInactive Publication Date: 2014-02-19HUBEI UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HUBEI UNIV OF TECH
Publication Date
2014-02-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for preparing a modified lignosulfonate water reducing agent with acrylic waste water as a raw material. The method comprises the steps as follows: determining the specific content of acrylic acid, a catalyst and a reducing agent in the acrylic waste water, adding an oxidizing agent into the acrylic waste water for pretreatment, and determining a synthesis ratio according to test results; and placing the lignosulfonate and deionized water in a certain proportion in a flask, stirring and heating the mixture to the temperature of 60-80 DEG C, and after stabilization, having a graft polymerization reaction with the acrylic waste water and small sodium sulfonate monomers under the action of a catalyst and an initiator to obtain the modified lignosulfonate water reducing agent. According to the method, the acrylic acid and ester waste water are used as modified monomers, so that the cost of the modified lignosulfonate water reducing agent is reduced.
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Description

technical field

[0001] The invention relates to a method for preparing a modified lignosulfonate water reducer by using acrylic acid wastewater as a raw material, and belongs to the technical field of building materials. Background technique

[0002] The rapid development of the acrylic acid industry has promoted the development of the social economy, but at the same time it has brought pressure on the ecological environment, manifested in the high concentration of organic wastewater discharged during the production process. Acrylic acid wastewater is the eluent after the esterification of acrylic acid and alcohol. In addition to acrylic acid, there are generally residual catalysts and reducing agents. For example, the eluent after the polymerization and esterification of acrylic acid and polyols, in addition to removing excess acrylic acid, there are residual catalyst methanesulfonic acid and a small amount of reducing agent hypophosphorous acid; The process wastewater of ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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