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Method for preparing ultramarine blue pigment

A pigment and Qunlan technology, which is applied in the direction of inorganic pigment treatment, chemical instruments and methods, fibrous fillers, etc., can solve the problems of long production cycle, high energy consumption, and high impurity content of Qunlan products, and achieve short reaction cycle and weather resistance Good performance and bright colors

Inactive Publication Date: 2014-09-24
慧科高新科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Qunlan product of this invention has high impurity content, and the calcination time alone reaches more than 100 hours, with long production cycle and high energy consumption

Method used

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  • Method for preparing ultramarine blue pigment
  • Method for preparing ultramarine blue pigment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Na 2 CO 3 , elemental sulfur, sodium hydroxide and activated carbon were dried at 110°C for 1 hour, and NaA molecular sieve was dried at 500°C for 1 hour; weigh 500 grams of NaA molecular sieve, 100 grams of elemental sulfur, 120 grams of sodium carbonate, and 5 grams, 25 grams of activated carbon, ground and mixed, placed in a ceramic crucible, compacted and sealed. Place the sealed crucible in an electric furnace, raise it to 600°C at a rate of 15°C / min for the first-stage calcination, and keep the temperature constant for 90 minutes to obtain a green solid. Fill the crucible with oxygen, carry out the second-stage roasting at 500°C, and keep the temperature constant for 40 minutes to obtain the crude group blue product. The prepared crude product was repeatedly washed in water at 60°C to remove water-soluble salts, and the crude product of Qunlan blue pigment after washing was stirred in 2% and 100°C sodium sulfite solution (solid-to-liquid ratio was 1:2) for 5 min...

Embodiment 2

[0044] Na 2 CO 3 , elemental sulfur, sodium hydroxide and activated carbon were dried at 110°C for 1 hour, and NaA molecular sieve was dried at 500°C for 1 hour; weigh 500 grams of NaA molecular sieve, 240 grams of elemental sulfur, 90 grams of sodium carbonate, and 35 grams, 80 grams of activated carbon, ground and mixed, placed in a ceramic crucible, compacted and sealed. Place the sealed crucible in an electric furnace, raise it to 750°C at a rate of 5°C / min for the first-stage calcination, and keep the temperature constant for 30 minutes to obtain a green solid. Fill the crucible with oxygen, carry out the second-stage calcination at 400°C, and keep the temperature constant for 80 minutes to obtain the crude group blue product. The prepared crude product was repeatedly washed in 100°C water to remove water-soluble salts, and the washed Qunlan blue pigment was stirred in 4% hot sodium sulfite solution at 80°C (solid-to-liquid ratio 1:3) for 6 minutes, washed with water, a...

Embodiment 3

[0046] Na 2 CO 3 , elemental sulfur, sodium hydroxide and rosin were dried at 110°C for 1 hour, and NaA molecular sieve was dried at 500°C for 1 hour; weigh 500 grams of NaA molecular sieve, 170 grams of elemental sulfur, 65 grams of sodium carbonate, and 20 grams of sodium hydroxide gram, 50 grams of rosin, ground and mixed, placed in a ceramic crucible, compacted and sealed. Put the sealed crucible in an electric furnace, raise it to 700°C at a rate of 10°C / min for the first-stage calcination, and keep the temperature constant for 60 minutes to obtain a green solid. Fill the crucible with oxygen, carry out the second-stage roasting at 450°C, and keep the temperature constant for 60 minutes to obtain the crude group blue product. The prepared product was repeatedly washed in water at 80°C to remove water-soluble salts, and the washed Qunlan blue pigment was stirred in 3% hot sodium sulfite solution at 60°C (solid-to-liquid ratio of 1:4) for 10 minutes, washed with water, an...

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Abstract

The invention belongs to the technical field of inorganic pigment preparation, and in particular relates to a method for preparing ultramarine blue pigment. The method comprises the following steps: drying a NaA type molecular sieve, sodium carbonate, elemental sulfur, sodium hydroxide and a reducing agent, weighing the dried raw materials, grinding, mixing, putting into a ceramic crucible, tightly compressing, and sealing up; putting the pre-sealed crucible into an electric oven for first stage of roasting so as to obtain green solid powder; preparing the green solid powder into granules, sealing in the presence of oxygen, and performing second stage of roasting so as to obtain a crude ultramarine blue pigment product; and repeatedly washing the crude ultramarine blue pigment product in hot water, adding the washed crude ultramarine blue pigment product into a hot sodium sulfite solution, stirring, subsequently adding water to wash, and drying, thereby obtaining the ultramarine blue pigment. The ultramarine blue pigment prepared by using the method is bright in color, the yield can be greater than 85%, the roasting reaction conditions are gentle, the production process is simple, the reaction period is short, and the pigment is non-toxic, is good in light resistance, alkali resistance and weather resistance, and is free of environmental pollution.

Description

technical field [0001] The invention belongs to the technical field of inorganic pigment preparation, and in particular relates to a preparation method of Qunlan blue pigment. Background technique [0002] Qunlan is a blue inorganic pigment with non-toxic, alkali-resistant, light-resistant, heat-resistant, insoluble in water and solvents and other environmentally friendly properties. It can be used for whitening, toning, and coloring. It is used in various industries such as ink, rubber, construction, paper, detergent, paint and so on. [0003] At present, kaolin is used as the main raw material for the production of Qunlan, and sulfur, sodium carbonate and other raw materials are added, and the product is obtained by high-temperature calcination. The crude product typically contains 75% by weight blue pigment, 23% sodium oxysulfide, 2% free sulfur with some iron sulfide. Patent CN1044668A has invented a kind of with kaolin (30~65%), cobalt nitrate or other cobalt salts (4...

Claims

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Application Information

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IPC IPC(8): C09C1/40C09C3/06
Inventor 徐会君唐守余
Owner 慧科高新科技股份有限公司
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