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Multifunctional cement adjustable solidification agent and preparation thereof

A coagulant and multi-functional technology, applied in the field of multi-functional cement coagulant and its preparation, can solve the problems of complex implementation process and achieve the effects of simple process, lower production cost and higher utilization value

Inactive Publication Date: 2011-09-28
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patented method uses waste as raw material, and the product produced not only has the function of adjusting the setting time of cement, but also has the functions of improving cement fluidity and grinding aid, but the implementation process of this patented method is relatively complicated

Method used

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  • Multifunctional cement adjustable solidification agent and preparation thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) With the sulfuric acid waste liquid containing aminonaphthalenesulfonic acid produced in the preparation process of the naphthalene series dye intermediate as raw material, the waste liquid is neutralized to a pH value of 10 with lime, and then the water content of press filtration to the filter residue is 9.5 %;

[0025] (2) Concentrate the filtrate to a water content of 41%, then add the concentrated filtrate accounting for 4.3% of the total weight of the filter residue and the concentrated filtrate to the filter residue, extrude into a ball machine, granulate and steam dry at 85°C to make a multifunctional cement Coagulant.

[0026] After testing, the CaSO in the multifunctional cement set modifier 4 2H 2 O content in SO 3 The percentage by weight of the compound is 37.2%, the percentage by weight of attached water is 5.5%, and the percentage by weight of calcium aminonaphthalenesulfonate is 2.4%.

Embodiment 2

[0028] (1) With the sulfuric acid waste liquid containing aminonaphthalenesulfonic acid produced in the preparation process of the naphthalene series dye intermediate as raw material, the waste liquid is neutralized to a pH value of 10 with lime, and then the water content of press filtration to the filter residue is 11.3 %;

[0029] (2) Concentrate the filtrate to a water content of 41.3%, then add concentrated filtrate accounting for 3.3% of the total weight of the filter residue and concentrated filtrate to the filter residue, extrude into a ball machine, granulate and steam dry, and the drying temperature is about 90°C. Multi-functional cement set modifier.

[0030] After testing, the CaSO in the multifunctional cement set modifier 4 2H 2 O content in SO 3 The percentage by weight of the compound is 38%, the percentage by weight of attached water is 5.1%, and the percentage by weight of calcium aminonaphthalenesulfonate is 2.0%.

Embodiment 3

[0032] (1) With the sulfuric acid waste liquid containing aminonaphthalenesulfonic acid produced in the preparation process of the naphthalene series dye intermediate as raw material, the waste liquid is neutralized to a pH value of 9.0 with lime, and then the water content of press filtration to the filter residue is 13.5 %;

[0033] (2) Concentrate the filtrate to a water content of 49.7%, then add the concentrated filtrate accounting for 2.8% of the total weight of the filter residue and the concentrated filtrate to the filter residue, extrude into a ball machine, granulate and steam dry, and the drying temperature is about 95°C. Multi-functional cement set modifier.

[0034] After testing, the CaSO in the multifunctional cement set modifier 4 2H 2 O content in SO 3 The percentage by weight of the compound is 38.5%, the percentage by weight of attached water is 5.8%, and the percentage by weight of calcium aminonaphthalenesulfonate is 1.6%.

[0035] The multifunctional ...

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Abstract

The invention discloses a multifunctional cement adjustable solidification agent which comprises the components of the following weight percentage: 35 to 40 percent of calcium sulfate-water (1 / 2) counted by the weight percentage content of SO3, 1 to 8 percent of adhesive water, as well as 1.5 to 2.5 percent of calcium aminonaphthol sulfonate. The invention also discloses a method for preparing the cement retarder. The method has the advantages of simple technique, less device investment, easy operation and no secondary pollution, thus greatly improving the utilizing value of industrial wastes, reducing the waste liquid processing cost of the naphthaline dye midbody enterprises, simultaneously reducing the cement production cost of cement production enterprises, and improving the cement performance.

Description

technical field [0001] The invention relates to the field of building material production, in particular to a multifunctional cement coagulation regulator and a preparation method thereof. Background technique [0002] At present, naphthalene-based dye intermediates often use refined naphthalene as raw material and are prepared by sulfonation process. During the production process, a large amount of waste liquid will be produced. The waste liquid is mainly composed of water, sulfuric acid, and often contains aminonaphthalenesulfonic acid, etc. The direct discharge of organic matter not only pollutes the environment, but also wastes a lot of precious resources. If it can be developed and utilized, it will bring huge economic effects. [0003] Cement settling agent is one of the important components of cement, which plays a role in adjusting the setting time of cement. Commonly used are gypsum, natural dihydrate gypsum and industrial by-product gypsum that meet the technical r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/42
CPCC04B2103/20C04B40/0039
Inventor 陈胡星张七男潘陈荣
Owner ZHEJIANG UNIV
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