Preparation of intumescent type flame retardant synergist on basis of magnesium oxide flue gas desulfurization residue

A technology of flame retardant synergist and desulfurization waste residue, applied in the field of intumescent flame retardant synergist, can solve the problems of unstable chemical properties, easy moisture absorption, low content, etc., to achieve high synergy efficiency, high added value, raw materials low cost effect

Active Publication Date: 2013-04-03
SUZHOU GUOYU CARBON FIBER TECH
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Problems solved by technology

[0005] The composition and structure of magnesium oxide flue gas desulfurization waste residue are similar to hydrotalcite and hydrotalcite-like, and in the prior art, one of the main characteristics of hydrotalcite and hydrotalcite-like First, it has the function of flame retardancy. However, since the magnesium oxide flue gas desulfurization waste res

Method used

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  • Preparation of intumescent type flame retardant synergist on basis of magnesium oxide flue gas desulfurization residue
  • Preparation of intumescent type flame retardant synergist on basis of magnesium oxide flue gas desulfurization residue
  • Preparation of intumescent type flame retardant synergist on basis of magnesium oxide flue gas desulfurization residue

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Embodiment 1

[0029] For the preparation process, see the attached figure 1

[0030] (1) Add 100mL of distilled water into a beaker, add 3g of dry magnesium oxide desulfurization waste residue, stir evenly at room temperature until the waste residue is completely wetted, and prepare a suspension A with a mass concentration of 3%;

[0031] (2) Add 0.01mol sodium dihydrogen phosphate to the above suspension A to obtain suspension B, stir and absorb at room temperature for 0.5 hours, then add 0.01mol ammonia water and 0.011mol zinc chloride to the above suspension B at the same time. The reaction was stirred at room temperature for 1 hour to obtain a suspension C;

[0032] (3) Adjust the pH of the suspension C to 7.2 with an appropriate amount of ammonia water, filter the suspension C and bake the solid powder at 105°C for 2 hours to obtain an intumescent flame retardant synergist with a yield of 89%. The obtained product was subjected to XRD analysis and FTIR analysis.

[0033] attached ...

Embodiment 2

[0036] For the preparation process, see the attached figure 1

[0037] (1) Add 100mL of distilled water into a beaker, add 20g of dry magnesium oxide desulfurization waste residue, stir evenly at room temperature until the waste residue is completely wetted, and prepare a suspension A with a mass concentration of 20%;

[0038] (2) Add 0.08mol sodium dihydrogen phosphate to the above suspension A to obtain suspension B, stir and absorb at room temperature for 1 hour, then add 0.07mol ammonia water and 0.08mol zinc chloride to the above suspension B at the same time. The reaction was stirred at room temperature for 1 hour to obtain a suspension C;

[0039] (3) Adjust the pH of the suspension C to 7.1 with an appropriate amount of ammonia water, filter the suspension C and bake the solid powder at 105°C for 2 hours to obtain an intumescent flame retardant synergist with a yield of 90%.

Embodiment 3

[0041] For the preparation process, see the attached figure 1

[0042] (1) Add 100mL of distilled water into a beaker, add 30g of dry magnesia desulfurization waste residue, stir evenly at room temperature until the waste residue is completely wetted, and prepare suspension A with a mass concentration of 30%;

[0043] (2) Add 0.12 mol of sodium dihydrogen phosphate to the above suspension A to obtain suspension B, stir and absorb at room temperature for 1 hour, then add 0.1 mol of ammonia water and 0.12 mol of zinc chloride to the above suspension B at the same time. The reaction was stirred at room temperature for 1 hour to obtain a suspension C;

[0044] (3) Adjust the pH of the suspension C to 7.1 with an appropriate amount of ammonia water, filter the suspension C and bake the solid powder at 105°C for 2 hours to obtain an intumescent flame retardant synergist with a yield of 92%.

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Abstract

The invention discloses a method for preparing intumescent type flame retardant synergist on the basis of magnesium oxide flue gas desulfurization residue. The method includes the steps of (1) adding water and dried magnesium oxide flue gas desulfurization residue in a reactor to prepare turbid liquid A with mass concentration ranging from 1-30%; (2) adding phosphate into the turbid liquid A, stirring at the room temperature for 0.5-1 hour to obtain turbid liquid B, simultaneously adding zinc salt and ammonia water in the turbid liquid B, and stirring at the room temperature for 1-2 hours to obtain turbid liquid C; (3) adjusting the pH (potential of hydrogen) value of the turbid liquid C to 6.5-7.5, filtering the turbid liquid C to obtain filtrate and solid powder, and drying the solid powder to obtain the intumescent type flame retardant synergist. The intumescent type flame retardant synergist prepared by the method contains elements including phosphorus, nitrogen, magnesium, silicon and the like, is good in cooperation efficiency with intumescent flame retardant, obvious higher in flame retardant efficiency of the fire retardant, and simultaneously has the advantages of high additional value, low raw material cost, environmental friendliness, simplicity in preparation method, wide raw materials sources and applicability to industrial production.

Description

technical field [0001] The invention relates to a method for preparing a flame retardant synergist, in particular to a method for preparing an environmentally friendly intumescent flame retardant synergist by utilizing magnesium oxide flue gas desulfurization waste residue. Background technique [0002] Intumescent flame retardants (IFR) meet the requirements of today's era of protecting the ecological environment due to their unique flame retardant mechanism, halogen-free, low smoke, low toxicity, and the generated carbon layer can effectively prevent polymer droplets. It is one of the most active areas of flame retardant research (see: Ou Yuxiang, Han Tingjie, Li Jianjun. Handbook of Flame Retardant Plastics [M]. Beijing: National Defense Industry Press, 2008). However, a major disadvantage of IFR is that the addition amount is relatively large, and the flame retardant efficiency is not high, which limits its wide application. Therefore, improving the flame retardant effi...

Claims

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Application Information

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IPC IPC(8): C08K7/24C08K7/26C08K3/34C08K3/22C08K3/30C08K3/32
Inventor 董延茂赵丹
Owner SUZHOU GUOYU CARBON FIBER TECH
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