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Blue Pigments Range

Comprehensive range of C-P-C Blue Crude and Pigment Blue variants manufactured with precision and quality

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C-P-C Blue Crude

High-purity crude pigment used as an intermediate in the production of various blue pigments.

Applications:

Specifications:

Premium grade with consistent quality parameters

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Pigment Alpha Blue 15:0

Alpha crystal form pigment offering excellent color strength and stability.

Applications:

Specifications:

CI Pigment Blue 15:0 - High tinctorial strength

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Pigment Alpha Blue 15:1

Reddish shade alpha blue pigment with superior dispersion properties.

Applications:

Specifications:

CI Pigment Blue 15:1 - Excellent weather fastness

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Pigment Alpha Blue 15:2

Alpha phase pigment with outstanding hiding power and color consistency.

Applications:

Specifications:

CI Pigment Blue 15:2 - Superior lightfastness

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Pigment Beta Blue 15:3

Beta crystal form offering brilliant greenish-blue shade with excellent performance.

Applications:

Specifications:

CI Pigment Blue 15:3 - Premium quality, high chroma

Sulphuric Acid

Industrial-grade sulphuric acid manufactured to the highest purity standards

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Sulphuric Acid (H₂SO₄)

Industrial-grade sulphuric acid manufactured to the highest purity standards.

Available Grades:

Specifications:

Concentration: 98% (Battery Grade & Technical Grade available)

Industrial Applications:

Quality You Can Trust

Every product undergoes rigorous testing and quality control to ensure consistent performance and reliability.

Product-Specific Workflows

CPC Blue Manufacturing

Stage 1

  • Add Ortho Chloro Aniline in H.S. Acid in chlorinated Cresol in fine reaction.
  • Then add urea, Phthalic Anhydride, Cuprous Chloride and Ammonium Poly Sulphide to melt.
  • Raise the temp up to $185 \text{ deg C}$.
  • During the process of melt, whatever gases are evolved, such as sulphur dioxide gas is passed out of the reactor and absorbed by $10\%$ caustic lye in storage tank/reactor and then after acid wash/blow. From the water scrubber we can also absorb ammonium carbamate as a byproduct.
  • After maintaining sufficient time during the batch in R.S. reactor for maximum condensation.
  • That will recover $\pm 90\%$ of the solvent. And transfer the remaining crude in HDPE/L vessel containing water.

Stage 2

  • Prepare water soluble crude material into dumping vessel with spent sulphuric acid (recover $60\%$ from flake fines and acid sludge).
  • Maintain temperature up to $95 \text{ deg C}$ in $15,000 \text{ L}$ glass lined reactor for $3 \text{ hrs}$.
  • Then filter in filter press, wash it, neutralize it, dry it, pulverize it and packed the crude material in a $50 \text{ kgs}$ bag.

Stage 3 (Pigmentation)

  • After blowing the water soluble crude material which will be neutralized that contains $0.8\%$ of sulphuric acid, we will treat it with a mild solution of $\text{NaOH}$ to become neutral. Then we will exchange it with $\text{NaCl}$ in $60 \text{ deg C}$, wash.

Stage 1 (Wet process)

  • Use Sulphuric acid ($\text{H}_2 \text{SO}_4$) in a reaction vessel. Then slowly charge Copper Powder at $50 \text{ deg C}$.
  • Maintaining temperature just below $80 \text{ deg C}$. So as to dissolve it $85\%$ completely.
  • The mass is stirred further for $6 \text{ hrs}$ at $80 \text{ deg C}$ and then cooled to room temp. by chilled water circulation in the jacket.
  • Recycled water is then introduced as a thin slurry into the vessel slowly, taking care that the temperature does not rise above $50 \text{ deg C}$.
  • The $\text{CPC}$ separator size in the required form and is filtered off.
  • After filtration process, whatever reactor foam generated that contains approximately $10 \text{ to } 12\%$ of the crude, the same quantity will be used for the next reaction of Alpha Blue.

Stage 2 (Pigmentation Process)

  • Wet product is charged to reactor, treated and washed with water and diluted with fresh water.
  • The resultant slurry is treated with $\text{H}_2 \text{SO}_4$ for $\text{pH}$ $0.5 \text{ to } 1.0$ using ammonia solution and caustic lye and heated with condenser at $90 \text{ deg C}$ for $3 \text{ hrs}$.
  • The dilute slurry is filtered and the cake is washed with required amount of fresh water.
  • Then the cake is dried at $60 \text{ deg C}$ for $24 \text{ hrs}$.
  • The aqueous filtrate $\text{GTS}$ goes to $\text{ETP}$. Then after it is discharged it is $650 \text{ to } 670 \text{ Kgs}$.

Stage 1 (Milling)

  • Crude $\text{CPC}$ ($\text{PB}$ $15.0$) is put into ball mill of capacity $15,000 \text{ kgs}$, add few solvents for $24 \text{ hrs}$.
  • After $24 \text{ hrs}$ discharge the milled slurry for stage $2$ (pigmentation).

Stage 2 (Pigmentation)

  • Charge crude milled blue into all vessels, dissolve caustic, urea, surfactants and dispersing agents. Stir up for $2 \text{ to } 3 \text{ hours}$.
  • Then recover the pigment, filter the pigmented mass through filter press, wash with water till neutral $\text{pH}$. Dry the pigment cake in open flask dryer at the rate of $75 \text{ kgs}$.
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