Dye Intermediates are organic compounds used in the production of dyes. These are usually petroleum products. They are further processed to produce dyes and pigments. They are an important raw material in the dye and pigment industry, which in turn forms one of the main suppliers in textile, paper, ink and plastic industry.
Some of the common dyes intermediaries are magenta lumps, malachite crystal, anthraquinone intermediates, orange, yellow and black acid-dyes.
Dyes and Dye Intermediates
The dyes that are produced by using dye intermediaries fall under the synthetic dyes, as opposed to natural dyes. Together dye and dye intermediaries includeazo dyes, naphthols, basic dyes, reactive dyes, vat dyes, direct dyes, disperse dyes, fast colour bases,sulphur dyes, organic and pigments.
Let us look at some of these dyes more closely:
— Basic dyes are water soluble and are used to dye textiles and paper. Acetic acid is used in the manufacturing process to improve dye absorption.
— Direct dyes use near boiling point during the dyeing process. Sodium compounds are added to neutral to slightly alkaline bath.
— Acid dyes, on the other hand, use neutral to acid bath. These are also water soluble dyes. Apart from fabric and paper, these dyes are also found in synthetic food colours.
— Vat dyes are insoluble in water. During dyeing an alkali metal salt is extracted that helps in dyeing the fabric.
— Reactive dyes are one of the most permanent dyes. They are easy to use and last a long time.
—Sulphur dyes are used for producing dark colours.
Dyes Intermediaries in India
Dyes and dye intermediate industries are one of the most important industrial sectors in India, a major player in the chemical industry. It is also one India’s most booming export sector, registering impressive growth. In fact, India is slowly creating a global niche for itself.
Much of this growth comes from the organised sector, which has slowly consolidated to become a formidable agency. The unorganized sector also has a substantial presence with millions depending on this industry. As the clothes, paper, printing and other associated industries register a boom in growth, this sector is expected to see demand shoot up.
This growth is further fuelled by overseas demand. The production base for dyes and dye intermediates has been slowly moving from the developed countries to countries like India and China. The shift in manufacturing has occurred mainly due to environmental concerns in those countries. The same concerns may affect manufacturers in the small sector in India.
India is today a major hub for reactive and disperse dyes. As expressed above, the industry is set to grow further as domestic and overseas demand shoots up. But there is still a lot to be done.
— We need further consolidation in the industry.
— As environmental concerns dominate, the industry must keep up, especially the small sector. Failure to do so may impact exports. As the Indian government also tightens its norms, it will also impact local demand.
— There is dire need for better R&D to balance environment concerns with cost efficiency.
Dyes intermediates manufacturers are a major player in Indian chemical industry and with its growth, they must come together to improve quality, competency and increasing their global share.