Dyes Industry

Introduction of Reactors for Dye Industry
There are three categories of equipment applicable in the dye industry made by WHGCM:

Pigment Extraction Equipment, Membrane Separation Equipment, and Dye Intermediate Synthetic Reactor.

I, Pigment Extraction Equipment

1.1 Supercritical Fluid Extraction Reactor System

Supercritical extraction equipment is a new type of extraction technology born in recent years. 

Its extraction principle is that when the material is in a specific supercritical state, once the material to be separated comes into contact with the supercritical fluid, the components of molecular weight and boiling point will be extracted one by one.
Extraction Media:
ᆞCarbon dioxide,
ᆞFreon, etc.,
ᆞEntrainment agents can also be added.


This type of pigment extraction equipment is mainly for producing natural pigments, such as anthocyanin, capsaicin, and turmeric. 


ᆞAdopts all kinds of circumstance temperatures,

ᆞEasy to operate.

ᆞEnvironment friendly.

ᆞGood for solid substances extraction.

ᆞEnergy saving.

1.2 Subcritical Low-Temperature Reactor System

Work condition:
ᆞWork pressure is 0.5MPa.
ᆞWork temperature is 35-50 ℃.
Comfrey pigment, Tea green pigment, Lutein, Anthocyanin, etc.
Subcritical low-temperature extraction technology has the following advantages:
ᆞLow extraction temperature,
ᆞLow extraction pressure,
ᆞLow separation temperature,
ᆞHigh extraction efficiency,
ᆞEnvironment friendly,
ᆞLow cost.
ᆞScale production.
ᆞHigh activity.

ᆞEnergy saving.

II, Membrane Separation Equipment

Membrane Separation Equipment can be used for the industrial production of natural pigment.


ᆞStrong adaptability,

ᆞStable operation,

ᆞEnergy saving,

ᆞSmall size

ᆞModular design for easy disassembly and cleaning

ᆞHigh Productivity

III, Dye Intermediate Synthetic Reactors

The vast majority of intermediates for synthetic dyes are organically synthesized. The working temperature and working pressure vary depending on the material.


ᆞO-chlorobenzonitrile 873-32-5 Used in dyestuff, medicine and other fine chemical intermediates.

ᆞ3,4,5-Trimethoxybenzoic acid 118-41-2 Dyes Food and fine chemicals.

ᆞBenzenebutyric acid 1821-12-1 Synthetic dyes Pharmaceutical intermediates Other fine chemicals. 

ᆞCyclohexanoyl chloride Used as dyestuff, pesticide, pharmaceutical intermediates Fine chemicals.

ᆞSulfonic acid Larger water solubility Can be used for making dyes Detergents.

ᆞColor pigments Water-soluble multi-color liquid dyes Industrial grade pigments.

ᆞAcrylonitrile vinyl cyanide rubber dyes.

ᆞPropylene oxide resin.

ᆞDichloroethane DCE Electronic cleaning agent Foaming agent.

ᆞCyclohexane Cleaning agent Industrial grade paint paint thinner.

ᆞp-Chlorobenzonitrile White needle crystal Used for dyes, intermediates, and other fine chemicals.

ᆞPhthalide CAS 87-41-2 Industrial grade Used in the production of dyestuffs Fine chemical intermediates Nengju chemical industry.

ᆞO-chlorobenzotrifluoride Pharmaceuticals Pesticides Dyes Intermediates Fine Organic Chemical Synthesis.

ᆞp-Hydroxybenzonitrile Fine chemical raw materials Dye intermediates Pharmaceutical grade.

ᆞBasic Yellow 40 (29556-33-0) Basic dyes Cationic dyes.

ᆞIndustrial Grade Propylene Glycol Methyl Ether Acetate Textile Dyes Colorless Hygroscopic Liquid.

ᆞ3-Aminophenol CAS No. 591-27-5 Fine chemical intermediate for pharmaceutical dyes and pesticides.

ᆞ2,6-Dibromo anthraquinone 2-hydroxy-9,10-anthracenedione 605-32-3 Used in the manufacture of intermediates Dyes and dyes.

ᆞp-Chloroaniline Organic intermediate for azo dyes Fine chemicals for agriculture and pigments.

ᆞBasic Violet 2 (New Product Red 3248-91-7) Hair dye.

ᆞMolybdenum disulfide Water-based dyeing and printing dyestuff Mechanical wear-resistant lubricant Industrial lithium grease Grease.

ᆞ1,2-Dimethylindole New dye intermediates.

ᆞ2-phenylamino-3-methyl-6-dibutylaminofluoran 89331-94-2 melanin-2 thermochromic dyes.

ᆞSuccinic acid alias: succinic acid CAS:110-15-6 Used as paint, dye, adhesive.

ᆞCresidine para-ester reactive red dye intermediate.

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