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Process for preparing super-strong anti-hard-water sodium (potassium) humate

A sodium humate and anti-hard water technology, applied in the direction of organic chemistry, can solve the problems of ineffective removal of harmful ions, poor uniformity of product degradation, limited improvement of hard water resistance, etc., to achieve low cost, high product yield, The effect of simple equipment

Inactive Publication Date: 2005-03-16
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The preparation method of anti-hard water humic acid sodium (potassium) at present all adopts the oxidizing inorganic acid of higher concentration (H 2 SO 4 ) to strengthen acidification degradation, although the hard water resistance of the obtained product has improved, harmful ions such as calcium and magnesium in the product cannot be effectively removed, the uniformity of product degradation is relatively poor, there are many side reactions, and the three wastes (waste acid The amount of liquid) is large, and the product's ability to resist hard water is limited
The product of Inner Mongolia Wuchuan Company, which has the best anti-hard water ability in China, can only resist 12.5 degrees of hard water for 8 hours and 45 minutes. The disadvantage is that it brings inconvenience to use on the one hand, and affects its performance on the other hand.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The weathered coal with 41.5% humic acid, 8% moisture and 14% ash is pulverized and passed through a 40-mesh sieve. In a 500mL three-neck flask equipped with stirring, constant temperature and temperature measuring devices, add 300mL of 2% sulfuric acid aqueous solution, start stirring, and add 30 grams of coal powder less than 40 meshes under stirring, and control the temperature at 25±5°C. Stir the reaction for 0.5 hour, vacuum filter the slurry obtained after the above reaction, discard the filtrate, and rinse the pulverized coal filter cake to obtain 46.5 grams of pulverized coal filter cake after acidification and washing (water content is about 60%) stand-by.

[0012] H 2 o 2 Add 250mL of aqueous solution with a concentration of 4% and a NaOH concentration of 1.7% into a 500mL three-neck flask equipped with a stirring, constant temperature and temperature measuring device. While stirring, add the above acidified and washed filter cake, and heat at 40°C. The rea...

Embodiment 2

[0015] The pulverization of the weathered coal with the device of Example 1 and the 40 mesh sieve. In a 500mL three-neck flask equipped with a stirring, constant temperature and temperature measuring device, add 300mL of 3% sulfuric acid aqueous solution and 30g of coal powder, control the temperature at 25±5°C, stir and react for 0.5 hours, and filter and rinse the reactant. Get 45.3 grams of pulverized coal filter cake for later use.

[0016] With the 500mL there-necked flask of example 1 device, add 280mL containing H 2 o 2 The aqueous solution with a concentration of 6% and a NaOH concentration of 2.5% was added to the above-mentioned coal powder filter cake under stirring, and reacted at 25° C. for 2.0 hours. Put the reactant in a 500mL beaker, settle naturally for 24 hours, recover the clear liquid, and dissolve 0.4 g of anti-hard water enhancer each accounting for 50% of EDTA-2Na and sodium pyrophosphate, concentrate and dry under vacuum to obtain Brown-black solid p...

Embodiment 3

[0019] The pulverization of the weathered coal with the device of Example 1 and the 40 mesh sieve. In a 500mL three-neck flask equipped with stirring, constant temperature and temperature measuring devices, add 300mL of 1% sulfuric acid aqueous solution and 30g of coal powder, control the temperature at 25±5°C, stir for 0.5 hours, and filter and rinse the reactants. Get 49.3 grams of pulverized coal filter cake for later use.

[0020] With the 500mL there-necked flask of example 1 device, add 300mL containing H 2 o 2 The aqueous solution with a concentration of 2% and a NaOH concentration of 1.5% was added to the above-mentioned coal powder filter cake under stirring, and reacted at 45° C. for 2.0 hours. Put the reactant into a 500mL beaker, let it settle naturally for 24 hours, take its clear liquid, and dissolve 1.0 g of anti-hard water enhancer each accounting for 50% of EDTA-4Na and sodium hexametaphosphate, concentrate and dry under vacuum , to obtain brown-black solid...

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PUM

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Abstract

The invent relates to a process for preparing super-strong anti-hard-water sodium (potassium) humate by using brown coal or decomposed coal as principal raw material, H2SO4 as acidating agent, H2O2 as oxidizing agent, and a two step synthesis is employed which consists of, subjecting the raw material containing rich humic acid (brown coal or decomposed coal) to acid-treatment under acidic conditions, then charging oxidation agent (hydrogen peroxide) under alkality condition, thus improving the product capability for resisting hard water.

Description

technical field [0001] The invention relates to a preparation method of sodium (potassium) humic acid with super strong resistance to hard water. Background technique [0002] Super anti-hard water sodium humate (potassium) is a brown-black solid particle with a slight metallic luster. It is easily soluble in water. The aqueous solution is a brown weakly alkaline solution, containing various active groups such as hydroxyl, carboxyl, quinone, and carbonyl. , has multiple functions such as ion exchange, adsorption, complexation, flocculation, and dispersion, and is mainly used as a crop growth regulator (foliar fertilizer), cement water reducer, drilling mud regulator, boiler water treatment agent, etc. [0003] The preparation method of anti-hard water humic acid sodium (potassium) at present all adopts the oxidizing inorganic acid of higher concentration (H 2 SO 4 ) to strengthen acidification degradation, although the hard water resistance of the obtained product has impr...

Claims

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Application Information

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IPC IPC(8): C07G99/00
Inventor 王正平
Owner HARBIN ENG UNIV
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