腐植酸应用技术论坛【25-2】:腐植酸类产品和技术简述

Manual on Humic Acid Products and Techniques

1Refined Humic Acid

1.1Brief Introduction

Refined Humic Acid (RHA) is a black-brown solid powder, soluble in basic solution, but insoluble in water. The pH is 3~4 in its 1% water suspension. The average number molecular weight is about 2000~5000.The product has fine chemical activation and colloid behavior, which achieved the quality indexes used to high-level battery.

1.2Main Technical Indexes

Qualified product: humic acid(HA)≥95%, insoluble matter in basic solution≤3%, Fe≤0.05%, moisture≤10%;

High-class product: HA≥99%, Fe≤0.05%.

(Note: All indexes are expressed by dry basis with the exception of moisture. The same in the rear.)

1.3Use Realms and Effects

(1) RHA is a fine expander of the negative pole in lead battery. The cohesion of active materials in the pole can be avoided effectively, and the work function and the use life time of battery are increased.

(2) Used to produce ion exchange risen for treatment of waste water.

(3) Used as intermediary matter of synthesizing chemical materials such as aromatic carboxyl acids, polymer esters, medicine and dyes etc.

1.4 Technological Process and Main Equipments

The technological Process is approximately:

Lower rank coals→extraction→pretreatment→purification(free of minerals and iron)→dry→RHA product.

Main Equipments are smasher, reactor, filtrator and dryer etc.

1.5Construction Scale and Equipments Investment

The Investment of technological Equipments is about US$ 100000 in case of scale 100T/a.

1.6Profit after Tax

About US$ 80000/a in case of scale 100T/a.

2Nitro-Humic Acid

2.1 Brief Introduction

The physical and chemical properties of nitro-humic acid (NHA) are similar to RHA, but its chemical and biological activation are higher, and the use realms are more extensive.

2.2Main Technical Indexes

Moisture≤15%, ash≤25%, NHA≥60%, Ntot≥2%, cations exchange capacity(CEC) ≥3mmol/g.

2.3Use Realms and Effects

(1) NHA is used widely to agriculture such as increasing the fertility and its utility, reclamation of soil, activating phosphorus and potassium, advancing function of resistance of crops to adversity, improving quality of crops when it compounds with fertilizers.

(2) NHA can adjust acidity in soil of culture rice seedlings so as to increasing the survival rate of seedlings.

(3) NHA is used as a fine material producing oil and gas drilling fluid additives which reduce strikingly the viscosity, shear and filtrate-loss, preventing collapse, resisting heated and salted fluid.

(4) Others: for example treatment of trade waste water and gases, organic synthesis, grow stimulator of plant, feed additive, cosmetics of safeguard skin, stink remover and so on.

2.4 Technological Process and Main Equipments

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