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Spray-dried, hydrous, kaolin clay and methods of making same

A technology of hydrokaolin and kaolin, which is applied in the field of spray-dried hydrokaolin clay and its production, and can solve problems affecting product properties and the like

Inactive Publication Date: 2015-04-08
BURGESS PIGMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it may not be desirable to have redispersible clay in certain products that include clay as a filler and may negatively affect the properties of these products

Method used

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  • Spray-dried, hydrous, kaolin clay and methods of making same
  • Spray-dried, hydrous, kaolin clay and methods of making same
  • Spray-dried, hydrous, kaolin clay and methods of making same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: preparation of chemical dispersant

[0023] Table 1

[0024] Material

[0025] The materials listed above are combined to form the chemical dispersants used in the methods described herein. COLLOID 102 is an ammonium polyacrylate commercially available from Kemira (Atlanta, GA). AMP-95 is 2-amino-2-methyl-1-propanol and 2-methylamino-2-methyl-1-propanol commercially available from Angus (Buffalo Grove, IL).

Embodiment 2-5

[0026] Embodiment 2-5: dispersion slurry preparation

[0027] Table 2

[0028]

[0029]

[0030] Water washed (Examples 2-4) and air floated (Example 5) kaolinite slurries were prepared. Coarse kaolin clay was mixed with water and the chemical dispersant provided in Example 1 to create a dispersed slurry. Sand and other large non-clay particles are removed from the dispersed mud and the dispersed mud is then chemically bleached using sulfuric acid and sodium dithionite. The resulting dispersed slurry is then filtered to produce a filter cake. The properties of the filter cake and spray-dried slurry are provided in Table 2.

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Abstract

A method of producing a spray-dried, hydrous kaolin clay is disclosed that includes mixing a hydrous kaolin clay with water, an ammonium polyacrylate or polyacrylic acid, ammonium hydroxide, and a propanolamine selected from the group consisting of 2-amino-2-methyl-1-propanol, 2-methylamino-2-methyl-1-propanol, 1-amino-2-propanol, or mixtures thereof, to produce a viscosity stable dispersed slurry, and spray drying the slurry to produce the spray-dried, hydrous, kaolin clay. A spray-dried, hydrous kaolin clay is also disclosed.

Description

Background technique [0001] Spray-dryable kaolin clay slurries can be prepared by treating kaolin with chemicals including pH adjusting chemicals and dispersants. These chemicals are added to reduce the viscosity of the slurry and maintain the stability of the slurry in a cost effective manner. Most of the chemicals used in these processes remain in the dry product, even after drying and crushing. Thus, the dispersant present in the dry product produces a clay that is redispersible in water. However, it may not be desirable to have redispersible clay in certain products that include clay as a filler, and may negatively affect the properties of these products. Summary of the invention [0002] A method of producing spray-dried hydrous kaolin clay is described herein. The method comprises mixing hydrous kaolin clay with water, ammonium polyacrylate or polyacrylic acid, ammonium hydroxide, and -propanolamine mixing of propanol, 1-amino-2-propanol, or a mixture thereof to pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/42
CPCC08K5/17C01P2006/22C09C1/42C01P2004/62C08L33/02B01D1/18C08K3/346
Inventor 乔治·L·布劳瑟姆刘易斯·A·贝利
Owner BURGESS PIGMENT
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