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Studies of the Cost Effective Synthetic Dyes(fast Green O) Suitable for Dyeing of Jute Products/fabrics.

Dr. Md. Kamal Uddin
PSO
Pilot Plant and Processing Divission BJRI, Dhaka-1207

Kh. Atiar Rahman
CSO
Pilot Plant and Processing Divission BJRI, Dhaka-1207

Abstract/ Executive Summary:

The experiment was conducted in the laboratory of Chemical Processing Department of Bangladesh Jute Research Institute during the year 2000 to 2001. The project has been taken to find out cost effective to synthetic dyes. One mono azo dyes named Fast Green O was prepared by direct coupling between diazonium salt and a phenol maintaining temperature from 0-8⁰ C and then applied to jute fabric by standard method. The prepared dyes was evaluated by determination of uniformity of shade, penetration and fastness properties of the dyed jute fabric. Penetration of color were found very good washing and rubbing fastness were satisfactory.

Keywords: Jute, Dye, synthetic, Diazotization, Coupling.

Location: Chemical Processing Department

Start Date: 00-00-2000

End Date: 00-00-2001

Program Area: Socio-economic and Policy

Commodity: Jute

Objectives:

To find out cost effective to synthetic dyes

Methodology:

i. Preparation of fast Green O Recipe : Resorcinol-20gms, hydrochloric acid (conc.)- 45gms, Sodium nitrite-25.5gms The resorcinol was dissolved in 800 ml of water and hydrochloric acid added, together with 100 gm of common salt. Ice was added until the temperature was zero degree centigrade, and into this normal solution, which was stirred mechanically, the sodium nitrite dissolved in 100 ml of water was allowed to flow very slowly the temperature no being allowed to rise above 8⁰C when all the nitrite has been added, the liquid showed show a acid reaction. after standing for an hour, the brownish-yellow precipitate was filtered off, washed with ice-cold water and the paste was dried and powered.

ii. Application of the prepared to jute: The prepared dyes was applied to the bleached jute fabric and yarn employing standard direct dyeing method. A light brownish-yellow shade was produced on the fabric/yarn.

Source of Information: Annual Technical Report 2000-2001, PP: 114-115.

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Only one mono azo dyestuff named Fast Green O was prepared by direct coupling between diazonium salt and a phenol. The dye was applied to jute by standard dyeing method. Different parameters were measured. Uniformity, penetration of color were very good. Washing and color fastness were satisfactory. The chemicals which are to be used for preparing synthetic dyes are very costly. so, this prepared dyes are not so cheaper than those of the synthetic dyes found in the market.

Knowledge Management: Report/Proceedings