Lignin Sulfonic Acid Soil Conditioner for Microbial and Mineral Enrichment

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Solution Overview

Problem

Existing soil conditioners do not effectively increase the amount of microorganisms and inorganic components in soil, which is crucial for crop health and organic agriculture.

Innovation Solution

A soil conditioner comprising lignin sulfonic acid with specific ranges of phenolic hydroxyl, methoxyl, and sulfone group-derived sulfur atom contents, along with other substituents and inorganic components, to enhance microbial growth and inorganic component presence.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If conventional soil conditioners (lignin degradation products or lignin derivatives) are used, then soil hardness is reduced or aggregate structure is promoted, but the amount of microorganisms and inorganic components in soil does not increase

Engineering Contradiction:

Improveamount of microorganismsVSAvoideffectiveness for organic agriculture

Core Design Contradiction:

Quantity of substanceVSAdaptability or versatility

Solution Approach 1:

The patent applies parameter changes by precisely controlling the phenolic hydroxyl group content (0.1-5.0% by weight), methoxyl group content (1.0-15.0% by weight), and sulfone group-derived sulfur atom content (2.0% or higher) of the lignin sulfonic acid. These specific compositional parameters enable the soil conditioner to simultaneously promote microbial growth and increase inorganic components, resolving the limitation of conventional conditioners that could not achieve both effects.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses composite materials by combining lignin sulfonic acid with specific functional groups (phenolic hydroxyl, methoxyl, sulfone) and inorganic components in a defined composition ratio. This composite structure allows the material to perform multiple functions: improving soil structure, promoting microbial growth, and increasing inorganic component content, thereby achieving versatility for organic agriculture.

Inventive Principle:

Principle #40Composite materials

2Quantity of substance

If conventional soil conditioners are used, then soil structure is improved, but inorganic components are not increased

Engineering Contradiction:

Improveamount of inorganic componentsVSAvoidcomplexity of composition control

Core Design Contradiction:

Quantity of substanceVSEase of manufacture

Solution Approach 1:

The patent achieves increased inorganic components through parameter changes in the lignin sulfonic acid composition, specifically by controlling the sulfone group-derived sulfur atom content at 2.0% or higher. This parameter adjustment enables the material to release inorganic components effectively while maintaining ease of manufacture through a well-defined compositional specification.

Inventive Principle:

Principle #35Parameter changes

3Quantity of substance

If a lignin sulfonic acid with high sulfone group content is used to increase inorganic components, then the composition control becomes more difficult, but this is necessary to achieve the desired effect

Engineering Contradiction:

Improveinorganic component contentVSAvoidcomposition control precision

Core Design Contradiction:

Quantity of substanceVSManufacturing precision

Solution Approach 1:

The patent resolves the manufacturing precision challenge by establishing specific parameter ranges for the lignin sulfonic acid: phenolic hydroxyl group content (0.1-5.0% by weight), methoxyl group content (1.0-15.0% by weight), and sulfone group-derived sulfur atom content (2.0% or higher). These precisely defined parameters enable consistent production of the soil conditioner with the desired inorganic component content while maintaining manufacturing feasibility.

Inventive Principle:

Principle #35Parameter changes

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The soil conditioner promotes microbial growth and increases inorganic components, leading to improved crop yield and the realization of organic agriculture.

Implementation Method 1

a phenolic hydroxyl group content of 0.1% to 5.0% by weight

Methodology Applied

Scientific EffectHydrogen bonding:

Implementation Method 2

a sulfone group-derived sulfur atom content of 2.0% or higher

Methodology Applied

Scientific EffectSulfone group interaction:

Implementation Method 3

causing the growth of microorganisms in soil and increasing inorganic components

Methodology Applied

Scientific EffectAdsorption: Adsorption

Data Source

PatentUS20260028455A1Soil conditioner

Publication Date: 2026.01.29 NIPPON PAPER IND CO LTD

AI summary

A soil conditioner including a lignin-based compound as an active ingredient and capable of efficiently increasing the amount of microorganisms and inorganic components in soil. The soil conditioner includes a lignin sulfonic acid having a phenolic hydroxyl group content of 0.1% to 5.0% by weight, a methoxyl group content of 1.0% to 15.0% by weight, and a sulfone group-derived sulfur atom content of 2.0% by weight or higher. An improved soil composition, including the soil conditioner and soil; a method for preparing improved soil, including adding the soil conditioner to soil; and a plant production method in which a plant is produced with the improved soil composition are also described.