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A kind of synthesis process and device of retarded polycarboxylate water reducing agent

A technology of retarded polycarboxylic acid and synthesis process, applied in the field of concrete water reducing agent preparation, can solve the problems of inability to add material, complicated feeding system, precipitation, etc., and achieve the effect of preventing product precipitation

Active Publication Date: 2022-06-07
TIANSHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For the reactors in the production process or production process design process, usually "I", "L", "H" or "U" methods are used to design and install multiple reactors, and the reaction raw material tanks can only be erected on Feeding directly above the reaction kettle, in which the reaction solid material tank can only be transported to one reaction kettle through a belt conveyor, and one belt conveyor cannot feed several reactors, and there is a problem of difficulty in feeding the reaction powder
Therefore, adding powder to multiple reaction vessels requires multiple reaction raw material storage tanks and multiple belt conveyors, making the feeding system complicated
[0005] At the same time, the water reducer obtained from the reaction is put into the storage tank, and the water reducer in the storage tank will precipitate after a period of time, which will affect its performance.
However, there is no relevant report on the production process and equipment of a retarded polycarboxylate superplasticizer prepared by a universal and efficient multi-polymerization method.

Method used

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  • A kind of synthesis process and device of retarded polycarboxylate water reducing agent
  • A kind of synthesis process and device of retarded polycarboxylate water reducing agent
  • A kind of synthesis process and device of retarded polycarboxylate water reducing agent

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Experimental program
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Effect test

Embodiment 1

[0096] (1) Preparation of raw materials:

[0097] Preparation of unsaturated polyether macromonomer A: Weigh 800Kg (according to 50 parts) allyl alcohol polyoxyethylene ether (APEG, number average molecular weight 1500-2400) and 800Kg (according to 50 parts) polyethylene glycol mono Methyl ether (MPEG, number average molecular weight 1500-2400), waiting for standby;

[0098] Preparation of starch and its modified starch monomer C: Weigh 5 parts of ordinary corn starch, 5 parts of gelatinized starch and 5 parts of sulfonated starch for subsequent use;

[0099] Preparation of preservative F: Weigh 0.05 part of dimethyl fumarate and put it in a beaker for later use;

[0100] The liquid dispensing in the 1-8# batching storage tanks in the liquid-phase batching storage tank group 2 is as follows:

[0101] Preparation of tap water: The preparation in the 1# batching storage tank is: a number of tap water (250g hexamethylenetetramine / 1000Kg water) added with tap water purifier E, a...

Embodiment 2

[0122] (1) Preparation of raw materials:

[0123] Preparation of unsaturated polyether macromonomer A: Weigh 800Kg (according to 50 parts) methallyl polyoxyethylene ether (TPEG, number average molecular weight 1500-2400) and 800Kg (according to 50 parts) isoprene Alcohol polyoxyethylene ether (HPEG, number average molecular weight 1500-2400), for use;

[0124] Preparation of starch and its modified starch monomer C: Weigh 5 parts of common wheat starch, 5 parts of gelatinized starch and 5 parts of sulfonated starch for use;

[0125] Preparation of preservative F: Weigh 0.05 part of dimethyl fumarate and put it in a beaker for later use;

[0126] The liquid dispensing in the 1-8# batching storage tanks in the liquid-phase batching storage tank group 2 is as follows:

[0127] Preparation of tap water: The preparation in the 1# batching storage tank is: a number of tap water (250g hexamethylenetetramine / 1000Kg water) added with tap water purifier E, added to the 1# batching of ...

Embodiment 3

[0147] (1) Preparation of raw materials:

[0148] Preparation of unsaturated polyether macromonomer A: Weigh 400Kg (according to 25 parts) allyl alcohol polyoxyethylene ether (APEG, number average molecular weight 1500-2400), 400Kg (according to 25 parts) polyethylene glycol mono Methyl ether (MPEG, number average molecular weight 1500-2400), 400Kg (according to 25 parts) methallyl polyoxyethylene ether (TPEG, number average molecular weight 1500-2400) and 400Kg (according to 25 parts) isopentene Alcohol polyoxyethylene ether (HPEG, number average molecular weight 1500-2400), for use;

[0149] Preparation of starch and its modified starch monomer C: Weigh 5 parts of ordinary potato starch, 5 parts of gelatinized starch and 5 parts of sulfonated starch for use;

[0150] Preparation of preservative F: Weigh 0.05 part of dimethyl fumarate and put it in a beaker for later use;

[0151] The liquid dispensing in the 1-8# batching storage tanks in the liquid-phase batching storage ...

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Abstract

The invention discloses a synthesis process and a device of a retarding polycarboxylate water reducer. The synthesis method of the present invention adopts multi-component copolymerization method to synthesize retarded polycarboxylate water reducer, and the synthetic raw materials used include unsaturated polyether macromonomer, unsaturated carboxylic acid small monomer, starch and its modified starch monomer , retarded / super-retarded functional monomer, tap water purifier, preservative, initiator, chain transfer agent, oxidizing agent, reducing agent and lye. The process and equipment of the present invention greatly improve the operability of the production system for producing retarded polycarboxylate superplasticizers by multi-component polymerization, and improve work efficiency, product component uniformity and quality stability. At the same time, the entire production system and equipment have the characteristics of novel structure, simple continuity, convenient operation, small footprint, low processing cost and easy industrialization, and have potential industrialization value and application prospect.

Description

technical field [0001] The invention relates to the field of concrete water reducing agent preparation, in particular to a synthesis process and a device of a retarded polycarboxylate water reducing agent. Background technique [0002] Polycarboxylate superplasticizer is a new generation of high-efficiency water-reducing agent. According to its performance and application, it is divided into retarding type, early-strength type, slump-preserving type, mud-resistant type, salt-resistant type, comprehensive type, etc. Foreign scholars and their production technicians have done a lot of research on the preparation methods of polycarboxylate superplasticizers with different functions, and they have achieved good results in both theoretical research and production practice research. Unfortunately, there is no efficient production process and equipment for producing retarded polycarboxylate water-reducing agent by multi-polymerization method. [0003] The preparation method of pol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/16C08F283/06C08F251/00C08F228/02C08F222/02C08F2/38C08F2/01C04B103/30
CPCC04B24/168C08F283/065C08F251/00C08F2/38C08F2/01C04B2103/302C08F220/06C08F226/02C08F222/02
Inventor 章德玉张惠琴刘流赵爱英王鹏刘岿司长代张建斌唐慧安左国防王小芳刘新文雷新有吕玲玲李志锋郭峰
Owner TIANSHUI NORMAL UNIV