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Ammonium lignosulphonate production method

A technology of ammonium lignosulfonate and ammonium method, applied in lighting and heating equipment, dryers, concentrated waste liquid, etc., can solve the problems of high energy consumption, high cost, high activation energy, etc., and achieve good economic benefits, The effect of less energy consumption and easy management

Active Publication Date: 2010-12-08
SHANDONG TRALIN PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the ammonium method grass pulp black liquor has high silicon content, high viscosity, high activation energy, many semi-fibers and miscellaneous cells, and is easy to deteriorate and produce precipitation, so the energy consumption and cost are high during evaporation and concentration.

Method used

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  • Ammonium lignosulphonate production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] (1) Evaporation and concentration

[0059] The fiber content of straw pulp black liquor by ammonium method is 200mg / L, Baume degree is 2, solid content=4%, pH=9; the temperature is 60°C, and the straw pulp black liquor is subjected to two-step flash evaporation to obtain the straw pulp after flash evaporation Pulp black liquor.

[0060] The straw pulp black liquor after flash evaporation is subjected to five-effect evaporation. The five-effect evaporation process is countercurrent multi-effect evaporation. The straw pulp black liquor after flash evaporation flows in from the V effect, and the heating steam flows in from the I effect. After the black liquor is heated and evaporated by the V effect, IV effect and III effect in turn, it becomes a low-semi-concentrated black liquor. The liquid is again heated and evaporated through the II effect and the I effect in turn, and becomes thick black liquor.

[0061] The above-mentioned heating steam has a temperature of 120°C ...

Embodiment 2

[0071] (1) Evaporation and concentration

[0072] The fiber content of ammonium method grass pulp black liquor is 100mg / L, the degree of Baume is 9, the solid content is 15%, and the pH is 13

[0073] The ammonium method straw pulp black liquor is directly subjected to five-effect evaporation. The five-effect evaporation process is countercurrent multi-effect evaporation. The straw pulp black liquor flows in from the V effect, and the heating steam flows in from the I effect. The straw pulp black liquor passes through the V effect, IV effect in turn. After being heated and evaporated by effect III and effect III, it turns into low semi-concentrated black liquor, and after being heated and evaporated by effect II and I, the low semi-concentrated black liquor becomes semi-concentrated black liquor, which then passes through effect II and effect I effect heating and evaporation, become thick black liquor. .

[0074] The above-mentioned heating steam has a temperature of 200°C a...

Embodiment 3

[0084] (1) Evaporation and concentration

[0085] The fiber content of straw pulp black liquor by ammonium method is 50mg / L, Baume degree is 6, solid content=10%, pH=10; the temperature is 70°C, and the straw pulp black liquor is subjected to one-step flash evaporation to obtain flash evaporated straw pulp black liquor.

[0086] The straw pulp black liquor after flash evaporation is subjected to five-effect evaporation. The five-effect evaporation process is countercurrent multi-effect evaporation. The straw pulp black liquor after flash evaporation flows in from the V effect, and the heating steam flows in from the I effect. After the black liquor is heated and evaporated by the V effect, IV effect and III effect in turn, it becomes a low-semi-concentrated black liquor. The liquid is again heated and evaporated through the II effect and the I effect in turn, and becomes thick black liquor.

[0087] The above-mentioned heating steam has a temperature of 130°C and a pressure ...

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Abstract

The invention relates to a method for preparing ammonium lignosulphonate. When the method is used for preparing the ammonium lignosulphonate, the energy resource consumption is little, the efficiency is high, simultaneously, the obtained ammonium lignosulphonate has wide applications, can be used for raw materials of various products with extremely high economic value and for preparing excellent water reducing agent, and can be added by little crosslinking agent for preparing lignin sand solidification agent, thus having excellent economic benefits.

Description

technical field [0001] The invention provides a method for preparing ammonium lignosulfonate, which belongs to the field of straw pulp black liquor treatment. Background technique [0002] More than 80% of the raw materials of my country's papermaking industry are grass fibers. There are two main types of straw fiber papermaking, alkaline pulping and sulfite pulping. Sulfite pulping is mainly based on ammonium pulping. Ammonium pulping is to use ammonium sulfite to react with lignin in plant fiber raw materials to generate soluble lignosulfonate and dissolve it to achieve the purpose of separating fibers. [0003] After pulping by the ammonium method, the black liquor contains ammonium nitrogen, sugar and other organic matter in addition to ammonium lignosulfonate. Its CODcr is generally above 120000mg / L. Therefore, the ammonium method straw pulp black liquor is a good raw material for the preparation of ammonium lignosulfonate. [0004] At present, the preparation of a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21C11/10F26B17/10
Inventor 李洪法宋明信郭良进陈学涛周长青杨茂峰王安保
Owner SHANDONG TRALIN PAPER