Residual lyes from the manufacture of wood pulp, including lignin sulphonates, but excluding tall oil

CPC v2.1 Code: 39230

Section	Division	Group	Class	Subclass
3	39	392	3923	39230

Code	39230
Version	CPC v2.1
Hierarchy Level	5
Datasource	UNSTATS
Section	3
Division	3 39
Group	3 392
Class	3 3923

Ancestor Codes: 3: Other transportable goods, except metal products, machinery and equipment; 39: Wastes or scraps; 392: Non-metal wastes or scraps; 3923: Residual lyes from the manufacture of wood pulp, including lignin sulphonates, but excluding tall oil

This Code: 39230: Residual lyes from the manufacture of wood pulp, including lignin sulphonates, but excluding tall oil

About residual lyes from the manufacture of wood pulp, including lignin sulphonates, but excluding tall oil

cpc code 39230 covers the residual lyes generated during the production of wood pulp. These lyes, which include lignin sulphonates, are a significant byproduct of the pulp and paper industry. They hold value as a raw material for various downstream applications, making this code an important part of the broader forestry and chemical sectors.

Production process

The production of residual lyes under cpc code 39230 is a result of the chemical pulping process used to extract cellulose fibers from wood. After the cellulose is separated, the remaining liquor, known as black liquor, is concentrated and processed to recover the inorganic chemicals and organic compounds, including lignin sulphonates.

Production inputs

The primary inputs for the production of residual lyes under cpc code 39230 are wood raw materials, typically softwood or hardwood, and the chemicals used in the pulping process, such as sodium hydroxide and sodium sulfide. The pulp mills and associated equipment required for the pulping and chemical recovery operations are also essential inputs for this industry.

Production outputs

The main output of cpc code 39230 is the residual lyes, which contain valuable compounds like lignin sulphonates. These lyes can be further processed and utilized as raw materials for the production of 39240 Tall oil, 35310 Synthetic organic colouring matter and preparations based thereon, and 35910 Plastics in primary forms, among other applications.

Family tree for residual lyes from the manufacture of wood pulp, including lignin sulphonates, but excluding tall oil

    graph LR
    A["<a href='/classifications/cpc/v2-1/3'>3: Other transportable goods, except metal products, machinery and equipment</a>"]
A --> B["<a href='/classifications/cpc/v2-1/39'>39: Wastes or scraps</a>"]
B --> C["<a href='/classifications/cpc/v2-1/392'>392: Non-metal wastes or scraps</a>"]
C --> D["<a href='/classifications/cpc/v2-1/3923'>3923: Residual lyes from the manufacture of wood pulp, including lignin sulphonates, but excluding tall oil</a>"]
D --> E["<a href='/classifications/cpc/v2-1/39230'>39230: Residual lyes from the manufacture of wood pulp, including lignin sulphonates, but excluding tall oil</a>"]

    
    

    %% Color coordination by level

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    classDef level2 color:#000,fill:#e0a458,stroke:#333,stroke-width:1px
    classDef level3 color:#000,fill:#419d78,stroke:#333,stroke-width:1px
    classDef level4 color:#000,fill:#c04abc,stroke:#333,stroke-width:1px
    classDef level5 color:#000,fill:#f1c40f,stroke:#333,stroke-width:1px
    classDef level6 color:#000,fill:#f1c40f,stroke:#333,stroke-width:1px
    classDef highlight color:#000,fill:#fff,stroke:#000,stroke-width:5px



  %% Apply classes
  class A level1
class B level2
class C level3
class D level4
class E level5

  class E highlight

  %% class A level1
  %% class B,C level2
  %% class D,E,F,G,H,I level2
  %% class J,K,L,M,N,O,P level3
  %% class E highlight