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Polycarboxylate superplasticizer catalyzing production technology without high temperature

A production process, polycarboxylic acid technology, applied in the field of building materials, can solve the problems of long production cycle, high risk, high purchase price, etc., and achieve the effects of improving production efficiency, reducing pollution, and saving energy consumption

Inactive Publication Date: 2014-01-01
WATER RESOURCES RES INST OF SHANDONG PROVINCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, deionized water requires special water treatment equipment to purify tap water, and the cost is relatively high; while pressure vessel equipment such as boilers required for a synthesis temperature of 80°C generally have high purchase prices, complicated approval procedures, and relatively high risks. In addition, the existing polycarboxylate superplasticizer has a long production cycle, only 3 kettles can be produced per day, the efficiency is low, and the long synthesis time also affects the output of the product

Method used

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  • Polycarboxylate superplasticizer catalyzing production technology without high temperature

Examples

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Effect test

Embodiment 1

[0013] The production process of the catalyst-free high-temperature polycarboxylate water reducer adopts the following steps:

[0014] (1) After adding 1t of tap water, 1t of methyl alkenyl polyoxyethylene ether, 80kg of sodium persulfate, and 7kg of azodiisopropylimidazoline hydrochloride in sequence in a 5000L stirring tank, turn on the agitator and stir evenly;

[0015] (2) add 35kg sodium bisulfite and 150kg tap water in 250kg metering bucket, fully stir until dissolving completely, obtain sodium bisulfite aqueous solution;

[0016] (3) Add 420kg water, 140kg acrylic acid and the aqueous sodium bisulfite solution obtained in the step (2) successively in the 1000L head tank, stir to obtain a mixed solution;

[0017] (4) Open the valve of the head tank, add the mixed solution prepared in step (3) dropwise into the stirring tank of step (1), stir while adding dropwise, after 1 hour, the catalyzed high-temperature free polycarboxylate is obtained when the material is discharge...

Embodiment 2

[0020] The production process of the catalyst-free high-temperature polycarboxylate water reducer adopts the following steps:

[0021] (1) After adding 1t of tap water, 1t of methyl alkenyl polyoxyethylene ether, 70kg of sodium persulfate, and 5kg of azodiisopropylimidazoline hydrochloride in sequence in a 5000L stirring tank, start the agitator and stir evenly;

[0022] (2) add 30kg sodium bisulfite and 150kg tap water in 250kg metering barrel, fully stir until completely dissolving, obtain sodium bisulfite aqueous solution;

[0023] (3) Add 420kg water, 140kg acrylic acid and the aqueous sodium bisulfite solution obtained in the step (2) successively in the 1000L head tank, stir to obtain a mixed solution;

[0024] (4) Open the valve of the head tank, add the mixed solution prepared in step (3) dropwise into the stirring tank of step (1), stir while adding dropwise, after 1 hour, the catalyzed high-temperature free polycarboxylate is obtained when the material is discharged....

Embodiment 3

[0026] The production process of the catalyst-free high-temperature polycarboxylate water reducer adopts the following steps:

[0027] (1) After adding 1t of tap water, 1t of methyl alkenyl polyoxyethylene ether, 90kg of sodium persulfate, and 10kg of azodiisopropylimidazoline hydrochloride in sequence in a 5000L stirring tank, turn on the agitator and stir evenly;

[0028] (2) add 40kg sodium bisulfite and 150kg tap water in 250kg metering bucket, fully stir until dissolving completely, obtain sodium bisulfite aqueous solution;

[0029] (3) Add 420kg water, 140kg acrylic acid and the aqueous sodium bisulfite solution obtained in the step (2) successively in the 1000L head tank, stir to obtain a mixed solution;

[0030] (4) Open the valve of the head tank, add the mixed solution prepared in step (3) dropwise into the stirring tank of step (1), stir while adding dropwise, after 1 hour, the catalyzed high-temperature free polycarboxylate is obtained when the material is discharg...

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Abstract

The invention relates to the field of building materials, and particularly discloses a polycarboxylate superplasticizer catalyzing production technology without high temperature. The polycarboxylate superplasticizer catalyzing production technology comprises the following steps: (1) sequentially adding tap water, methyl polyoxyethylene alkenyl ether, sodium persulfate and azo diisopropyl imidazoline hydrochloride into an agitation tank to be uniformly stirred; (2) adding 30-40 kg of sodium bisulfite and 150 kg of tap water into a measuring tank, fully stirring to enable the sodium bisulfite to be completely dissolved to prepare a sodium bisulfite aqueous solution; (3) sequentially adding 420 kg of water, 140 kg of acrylic acid and the sodium bisulfite aqueous solution into an overhead tank to be uniformly stirred to obtain a mixed solution; (4) opening a valve of the overhead tank to enable the mixed solution to be dropwise added into the agitation tank, performing dripping and stirring at the same time, allowing the dripping to be completed within 1 hour, and obtaining the polycarboxylate superplasticizer after discharging. The production technology has the benefits that the production efficiency is improved, the synthesis reaction temperature is reduced, the synthesis time is shortened, the production cost is greatly reduced, and environmental pollution is reduced.

Description

(1) Technical field [0001] The invention relates to the field of building materials, in particular to a production process of a catalyst-free high-temperature polycarboxylate water reducer. (2) Background technology [0002] The existing production process of polycarboxylate superplasticizer needs to be synthesized in the environment of deionized water, the synthesis temperature is 80°C, and the synthesis time is 7 hours. Among them, deionized water requires special water treatment equipment to purify tap water, and the cost is relatively high; while pressure vessel equipment such as boilers required for a synthesis temperature of 80°C generally have high purchase prices, complicated approval procedures, and relatively high risks. In addition, the existing polycarboxylate superplasticizer has a long production cycle, which can only produce 3 kettles per day, and the efficiency is low. The long synthesis time also affects the output of the product. (3) Contents of the inven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/06C08F4/40C08F4/04C04B24/26C04B103/30
Inventor 王锦龙许尚杰刘珊文刘甦王飞张爱民张广贞张禾杨萌朱传磊
Owner WATER RESOURCES RES INST OF SHANDONG PROVINCE
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