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Crystallization aids for bayer aluminum hydroxide

A technology of aluminum hydroxide and Bayer process, which is applied in the fields of aluminum oxide/aluminum hydroxide, organic chemistry, aluminum compounds, etc., and can solve problems such as existing industrial needs

Active Publication Date: 2015-11-11
ECOLAB USA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Despite ongoing and ongoing development worldwide, there remains an industrial need for more economical solutions to the above processes

Method used

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  • Crystallization aids for bayer aluminum hydroxide
  • Crystallization aids for bayer aluminum hydroxide
  • Crystallization aids for bayer aluminum hydroxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0242] Properties of Butylphenol Formaldehyde Resin Preparation

[0243] The coarsening effect of butylphenol formaldehyde resin obtained from commercial sources was evaluated. The resin is formed under acidic conditions with an excess of butylphenol (where L=-CH 2 -). Two formulations containing this resin were prepared:

[0244] Formulation A: butylphenol formaldehyde resin formed under acidic conditions dispersed in ethoxylated and propoxylated ethers at a concentration of 100 g / L; and

[0245] Formulation A ＊ : Butylphenol formaldehyde resin formed under acidic conditions, dispersed in kerosene at a concentration of 50g / L.

[0246] Tables 1 and 2 show the effect of butylphenol-formaldehyde formulations on the particle size of Bayer aluminum hydroxide at 72°C and 68°C, respectively. The particle size distribution is given by three quantiles: d(0.1), d(0.5) and d(0.9). Therefore, 10%, 50% and 90% of the total particle volume (or mass), respectively, are smaller than th...

Embodiment 2

[0254] Properties of phenolic resin formulations

[0255] The coarsening effect of additional phenolic resins was evaluated. The resin is under acidic conditions (wherein L=-CH 2 -) or under alkaline conditions (wherein L=-O-CH 2 -)form. Prepare the following formulations:

[0256] Formulation A: butylphenol formaldehyde resin formed under acidic conditions with an excess of butylphenol, solvated in ethoxylated and propoxylated ethers at a concentration of 100 g / L;

[0257] Formulation A ＊ : A butylphenol formaldehyde resin formed under an excess of butylphenol under acidic conditions, solvated in kerosene at a concentration of 50 g / L.

[0258] Preparation B: resorcinol formaldehyde resin dissolved in 15g / L NaOH solution at a concentration of 100g / L;

[0259] Formulation C: butylphenol formaldehyde resin formed under a large excess of formaldehyde under alkaline conditions, solvated in ethoxylated and propoxylated alkyl ethers at a concentration of 100 g / L;

[0260] For...

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PUM

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Abstract

Disclosed herein are compounds, compositions, and methods for producing aluminum hydroxide crystals from a precipitation liquor. The precipitation liquor may be located in a Bayer process.

Description

technical field [0001] The present disclosure relates generally to compounds, compositions and methods that increase the recovery of aluminum value from aluminum hydroxide production processes, such as the Bayer process, and more particularly, to compounds that increase the particle size of aluminum hydroxide crystals or crystalline agglomerates and composition. Background technique [0002] Aluminum hydroxide is produced on an industrial scale by recognized methods such as the Bayer process. Precipitation process operators optimize their processes to produce the greatest possible yield from the aluminate process liquor while attempting to achieve a specific crystal size distribution of the aluminum hydroxide product. In most cases it is desirable to obtain a product of relatively large crystal size, and accordingly to limit the amount of very fine crystals, as this is beneficial in the subsequent processing steps required to produce aluminum metal. Production is generally...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/02C07C43/16C01F7/145
CPCC01F7/145C01P2004/51C01P2004/61
Inventor 詹姆斯·康特约翰·T·马利托
Owner ECOLAB USA INC