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Retarder and preparation method thereof

A technology for setting retarder and production wastewater, applied in the field of concrete additives, can solve the problems of limited adsorption capacity of activated carbon adsorption technology, inability to recover beneficial components, and high operating costs, achieve good retardation effect, good preheating effect, and ingenious synthesis method Effect

Active Publication Date: 2017-10-03
武汉新绿博恩科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these methods can reduce environmental pollution to a certain extent, there are certain limitations, and the beneficial components therein cannot be recovered.
For example, anaerobic fermentation starts slowly in biological treatment, is greatly affected by pH value and temperature, requires strict controller operating conditions, and high operating costs; activated carbon adsorption technology has limited adsorption capacity, and requires frequent regeneration when adsorbing high-concentration wastewater; Treatment technology treats wastewater, and the filter membrane is easy to clog; flocculation method treats wastewater, and the removal rate is low

Method used

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  • Retarder and preparation method thereof
  • Retarder and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] A preparation method of retarder, comprising the following steps:

[0042] Step 1: Determination of the composition content of corn starch production wastewater:

[0043] Collect 1L of cornstarch production wastewater, and measure the content of soluble cellulose, sugar, protein, starch and fatty acid in it, and the test method is carried out by conventional test methods. Calculates the mass of soluble cellulose, carbohydrates, protein, starch and fatty acids.

[0044] Step 2: Heat and concentrate:

[0045] Concentrating the cornstarch production wastewater for concentration measurement, the concentration temperature is 100° C., and the concentration time is 3-5 hours. When the mass concentration of protein in the test is 5%, the concentration is stopped to obtain the first mixed solution.

[0046] Step 3: Protein hydrolysis:

[0047] The first mixed solution after step 2 is concentrated is adjusted its pH value to 2 with sulfuric acid solution, stirs, is heated to 4...

Embodiment 2

[0053] A preparation method of retarder, comprising the following steps:

[0054] Step 1: Determination of the composition content of corn starch production wastewater:

[0055] Collect 1L of cornstarch production wastewater, and measure the content of soluble cellulose, sugar, protein, starch and fatty acid in it, and the test method is carried out by conventional test methods. Calculates the mass of soluble cellulose, carbohydrates, protein, starch and fatty acids.

[0056] Step 2: Heat and concentrate:

[0057] Concentrating the cornstarch production wastewater for concentration measurement, the concentration temperature is 120° C., and the concentration time is 3-5 hours. When the mass concentration of protein in the test is 10%, the concentration is stopped to obtain the first mixed solution.

[0058] Step 3: Protein hydrolysis:

[0059] Use hydrochloric acid solution to the first mixed solution concentrated in step 2, adjust the pH value to 3, stir, heat to 50°C, and ...

Embodiment 3

[0065] A preparation method of retarder, comprising the following steps:

[0066] Step 1: Determination of the composition content of corn starch production wastewater:

[0067] Collect 1L of cornstarch production wastewater, and measure the content of soluble cellulose, sugar, protein, starch and fatty acid in it, and the test method is carried out by conventional test methods. Calculates the mass of soluble cellulose, carbohydrates, protein, starch and fatty acids.

[0068] Step 2: Heat and concentrate:

[0069] Concentrate the cornstarch production wastewater for concentration measurement, the concentration temperature is 115° C., and the concentration time is 3-5 hours. When the mass concentration of protein in the test is 6%, the concentration is stopped to obtain the first mixed solution.

[0070] Step 3: Protein hydrolysis:

[0071] Use sulfuric acid solution to the first mixed solution concentrated in step 2, adjust the pH value to 2, stir, heat to 45°C, then add As...

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Abstract

The invention provides a retarder prepared from corn starch wastewater, wherein a mass ratio of esterified saccharide to proteins and amino acids to starch succinate to soluble cellulose to fatty acid is (3-6): (10-20): (50-100): (20-30): (1-3); modified starch is starch succinate; and the esterified saccharide is a derivative obtained by reacting the hydroxyl groups of saccharide in the corn starch production wastewater with an esterification reagent. A preparation method for the retarder in the invention comprises the following steps: determination of the component contents of the wastewater; heating and concentration; modification of starch and saccharide; and adjustment of a pH value. According to the invention, the corn starch production wastewater is recycled, and the prepared retarder has the advantages of low cost, energy conservation, environmental protection, good dispersibility, good retarding effect, uniform hydration heat release and good air entraining effect, and is especially applicable as a concrete pumping agent.

Description

technical field [0001] The invention relates to a retarder and a preparation method thereof, in particular to a retarder prepared from cornstarch production wastewater and a preparation method thereof, and belongs to the technical field of concrete additives. Background technique [0002] Starch is a very important industrial raw material. In addition to edible and processed foods, it is also widely used in textiles, papermaking, medicine, fermentation, casting, adhesives, chemicals, machinery and drilling industries. [0003] At present, about 80% of my country's starch production uses corn as raw material. During production, a large amount of organic wastewater will be generated. Direct discharge not only makes starch production cost high, consumes a lot of water, and corn loss is large, but also due to production wastewater The corruption of organic matter such as protein and fatty acid in the water will make the water black and smelly, and the dissolved oxygen in the wate...

Claims

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Application Information

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IPC IPC(8): C04B24/38C08B31/04
CPCC04B40/0039C04B2103/22C08B31/04C04B24/14C04B24/08C04B24/38C04B24/383
Inventor 陈刚陈学兵
Owner 武汉新绿博恩科技有限公司
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