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Polycarboxylic acid high-performance water reducing agent production and synthesis device and production process thereof

A synthesis device and water reducing agent technology, applied in the direction of feeding device, chemical/physical/physicochemical process, chemical/physical/physicochemical fixed reactor, etc. The quality of the water reducing agent, the molecular structure of the water reducing agent is not flexible, etc.

Inactive Publication Date: 2021-07-02
浙江衢州鼎盛建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. In-situ polymerization grafting method: Polyether is used as the medium for the polymerization reaction of unsaturated monomers, so that the main chain polymerization and the introduction of side chains are carried out simultaneously. The process is simple, and the molecular weight of the synthesized water reducer can be obtained to a certain extent. control, but the esterification reaction involved in this method is a reversible reaction, and the grafting rate is relatively low in aqueous solution, which has been gradually eliminated. E14]
[0005] 2. Polymerization first and then functionalization method: This method is mainly to synthesize the main chain of the water reducing agent first, and then introduce the side chain into other methods for functionalization. This method is difficult to operate, and the molecular structure of the water reducing agent is not flexible and monotonous. The poor compatibility between body and question makes the use of this method greatly restricted. E15]
[0007] In the preparation of the existing polycarboxylate water reducer, the unsaturated polyether used is a copolymer of polyoxyethylene or polyoxyethylene and polyoxypropylene in the side chain, and the side chain still has strong hydrophilicity. And the polymerization activity of the synthesized polyether is not strong, and 2-acrylamide-2 methyl propane sulfonic acid is in the raw material, and this raw material is expensive and has chain transfer effect, can not obtain the polycarboxylic acid product with higher molecular weight, and mud resistance effect Poor; at the same time, it is difficult to effectively mix the materials fully during the stirring preparation, which affects the quality of the polycarboxylate superplasticizer in the subsequent preparation

Method used

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  • Polycarboxylic acid high-performance water reducing agent production and synthesis device and production process thereof
  • Polycarboxylic acid high-performance water reducing agent production and synthesis device and production process thereof
  • Polycarboxylic acid high-performance water reducing agent production and synthesis device and production process thereof

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Embodiment 1

[0044] Such as figure 1 As shown, the present invention discloses a polycarboxylate high-performance water reducer production and synthesis device. In a specific embodiment of the present invention, it includes a polyether primary reaction kettle 1 and a polyether primary reaction kettle 2 connected in sequence. , polyether secondary reaction kettle 3, polyether secondary reaction kettle 4 and water reducer reaction kettle 5, and the polyether primary reaction kettle 1, polyether primary reaction kettle 2, polyether secondary The reactor 3, the polyether secondary reactor 4 and the water reducer reactor 5 are equipped with a stirring device for stirring materials and a temperature control device for controlling the reaction temperature, and also includes a storage tank for 4-hydroxybutyl vinyl ether. 4-hydroxybutyl vinyl ether storage tank 10 and ethylene oxide and butylene oxide storage tank 11 storing ethylene oxide and butylene oxide, the polyether primary pre-reactor 1, po...

Embodiment 2

[0056] like figure 2 , Figure 9 and Figure 10 As shown, the difference between this embodiment and the above embodiment is that in this embodiment, a nitrogen replacement device is provided on the polyether primary reactor 2, and the nitrogen replacement device includes an air intake unit 8 and a pumping unit 8. Gas unit 9, the air intake unit 8 includes a nitrogen storage tank 89 storing nitrogen, a nitrogen delivery pipe 87 connecting the nitrogen storage tank 89 and the polyether primary reactor 2, and a delivery pump 88 installed on the nitrogen delivery pipe 87 And the quick exhaust valve 80 installed on the nitrogen delivery pipe 87, the output end of the quick exhaust valve 80 is multiple and communicated with the feed cylinder 63 and the spray nozzle 71 respectively; The suction pump 91 and the suction pipe 92 of the polyether primary reactor 2.

[0057] In this embodiment, the quick exhaust valve 80 is provided with a first valve port 801, a second valve port 80...

Embodiment 3

[0063] The invention also discloses a production process of polycarboxylate high-performance water reducer. In a specific embodiment of the invention, the following steps are included:

[0064] S1, primary synthesis, synthesis of 4-hydroxybutyl vinyl polyoxyethylene polyoxybutylene ether oligomer, specifically: open the discharge output end of the 4-hydroxybutyl vinyl ether storage tank, and feed polyether- Add a certain amount of 4-hydroxybutyl vinyl ether into the first-level pre-reactor, turn on the stirring device to stir, use the catalyst continuous feeder to add catalyst metal sodium into the first-level pre-reactor, and keep the temperature at a constant temperature through the temperature control device At room temperature, the primary pre-reactant is obtained; the original gas in the polyether primary reaction kettle is extracted by an air pump, and the temperature of the polyether primary reaction kettle is controlled by a temperature control device to rise to 90 ° C,...

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Abstract

According to the technical scheme, a polycarboxylic acid high-performance water reducing agent production and synthesis device is characterized by comprising a polyether primary pre-reaction kettle, a polyether primary reaction kettle, a polyether secondary pre-reaction kettle, a polyether secondary reaction kettle and a water reducing agent reaction kettle which are connected in sequence; the device further comprises a 4-hydroxybutyl vinyl ether storage tank and an ethylene oxide and epoxybutane storage tank; the water reducing agent reaction kettle is further provided with an unsaturated monocarboxylic acid monomer solution storage tank and an initiator and chain transfer agent solution storage tank, and the polyether primary pre-reaction kettle and the polyether secondary pre-reaction kettle are provided with continuous catalyst feeders; and a first feeding mechanism for dispersing and feeding materials and a second feeding mechanism for atomizing and feeding ethylene oxide, epoxybutane and 4-hydroxybutyl vinyl ether are arranged on a feeding hole of the polyether primary reaction kettle. The device has the beneficial effects that the efficiency of producing and synthesizing the polycarboxylate water reducing agent is high, the mixing is sufficient, and the quality of the produced polycarboxylate water reducing agent is good.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to a production synthesis device and a production process of a polycarboxylate high-performance water reducer. Background technique [0002] Polycarboxylate Superplasticizer (Polycarboxylate Superplasticizer) is a high-performance water reducer and a cement dispersant in the application of cement concrete. Widely used in highways, bridges, dams, tunnels, high-rise buildings and other projects; according to the different main chain structures, polycarboxylate high-efficiency water reducers can be divided into two categories: one is based on acrylic acid or methacrylic acid The main chain is grafted with polyethers of different side chain lengths; the other is polyethers with maleic anhydride as the main chain grafted with different side chain lengths; based on this, a series of high-performance water reducers with different characteristics have been derived product. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/18B01J19/00B01J4/00C08F283/06C08F220/06C08F2/01
CPCB01J19/18B01J19/0053B01J4/001C08F283/065C08F2/01C08F220/06
Inventor 蔡健郑思俊张正亮张利泉朱强
Owner 浙江衢州鼎盛建材有限公司
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