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Low-cost modified amino-sulfonic acid-based high-efficiency water reducer and preparation method thereof

A sulfamic acid-based, high-efficiency water-reducing agent technology is applied in the field of building materials to achieve the effects of wide range of raw materials, good application prospects and stable reaction

Active Publication Date: 2010-08-18
NANJING RUIDI HIGH TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, there is no report on the preparation method and application of low-cost modified sulfamic acid-based high-efficiency water reducer using industrial waste phenol residue, crude p-aminobenzenesulfonic acid and straw pulp black liquor

Method used

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  • Low-cost modified amino-sulfonic acid-based high-efficiency water reducer and preparation method thereof
  • Low-cost modified amino-sulfonic acid-based high-efficiency water reducer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Add 990 kg of water to the reaction kettle and heat it to 65-70°C, add 375 kg of crude p-aminobenzenesulfonic acid, 313 kg of refined bisphenol A waste phenol residue and 100 kg of caustic soda, and heat up to 85-90°C while stirring ; Add 584 kg of formaldehyde dropwise, finish dropping within 20-30 minutes, and keep the temperature between 90°C-95°C, keep warm for 4 hours; then add 605 kg of remaining grass pulp black liquor and 33 kg of caustic soda, Keep warm at ~90°C for 3 hours; cool to room temperature to prepare liquid product.

Embodiment 2

[0046] Add 1010 kg of water to the reaction kettle and heat it to 65-70°C, add 370 kg of crude p-aminobenzenesulfonic acid, 330 kg of refinery waste phenol residue and 100 kg of caustic soda, and heat up to 85-90°C while stirring; Add 598 kg of formaldehyde, drop it in 20-30 minutes, keep the temperature between 90-95°C, and keep warm for 3 hours; then add 552 kg of remaining grass pulp black liquor, 30 kg of caustic soda and 10 kg of calcium hydroxide, Keep the temperature between 85° C. and 90° C. for 3 hours; cool to room temperature, and then prepare the liquid product.

[0047] The following is the performance situation of the present invention and its performance comparison with similar products:

[0048] Main raw materials, concrete mix ratio and test method Raw materials:

[0049] Cement: Jinning Yang P·II42.5 cement produced by Jiangnan Cement Plant

[0050] Sand: medium sand with a fineness modulus of 2.6.

[0051] Stone: basalt produced in Jiangning, Nanjing, cru...

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Abstract

The invention discloses a low-cost modified amino-sulfonic acid-based high-efficiency water reducer and a preparation method thereof. The preparation method comprises the following steps of: adding 25-35 parts by weight of water into a reaction kettle, heating the water to 65-70 DEG C, inputting 10-17 parts by weight of interaction sulfanilic acid, 9-14 parts by weight of industrial waste phenolic residue and 3-5 parts by weight of pH value regulator, and raising the temperature to 85-90 DEG C while stirring; dropwise adding 18-26 parts by weight of formaldehyde within 15-30min, and keeping the temperature to be 92-95 DEG C for 2-6h; and adding 1-2 parts by weight of pH value regulator and 15-22 parts by weight of straw pulp black liquor, keeping the temperature within 85-90 DEG C for 2-4h, and cooling to the room temperature to obtain a liquid product. The product is prepared by utilizing a rough industrial product and industrial wastes with lower price as synthesis monomer and modifiers, thereby improving the inherent defects of mixing amount sensitivity and easy bleeding and bottom pushing of concrete of the amino-sulfonic acid-based high-efficiency water reducer, lowering the production cost of the water reducer, fully utilizing the industrial wastes and reducing the environmental pollution.

Description

technical field [0001] The invention relates to a low-cost modified sulfamic acid-based high-efficiency water reducer and a preparation method thereof. The main method for reducing the cost is to use low-cost industrial waste and crude industrial products as raw materials, and belongs to the technical field of building materials. Background technique [0002] Concrete water reducer is an important component of high performance concrete. At present, in the domestic market, the high-efficiency water-reducing agents are mainly naphthalene-based and polycarboxylic acid-based water-reducing agents. The latter is mainly used in high-performance concrete such as passenger dedicated lines because of its high price. Sulfonic acid-based high-efficiency water reducer, etc. The disadvantage of naphthalene-based water reducer is that the slump loss is large, and it contains a certain amount of sodium sulfate. Crystallization and precipitation are easy to occur in low-temperature environ...

Claims

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Application Information

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IPC IPC(8): C04B24/20C04B103/30
Inventor 陈国新祝烨然王冬唐修生蔡明黄国泓付丹华
Owner NANJING RUIDI HIGH TECH
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