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Preparation process of sulfonated solid particle

A solid particle, sulfonation technology, applied in the formation/introduction of sulfonic acid group/dihydroxysulfonyl group, dyeing low molecular organic compound treatment, thin material treatment, etc.

Inactive Publication Date: 2003-05-14
DAINICHISEIKA COLOR & CHEM MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, large quantities of solid sulfur trioxide cannot be used in commercial production from the viewpoint of feasibility and safety

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] A total of 100 parts of powdered carbon black pigment (average particle diameter: 0.013 μm) was predried in a drier at 150° C. for 1 hour, and then placed in a reactor. The sulfur is burned separately to produce gaseous sulfur dioxide, which is catalytically oxidized to produce gaseous sulfur trioxide. A mixture of dry air and gaseous sulfur trioxide heated at 80° C. to 110° C. was fed into the reactor, wherein the concentration of gaseous sulfur trioxide was 8% relative to the dry air, followed by sulfonation for 2 hours. The reaction mixture was cooled, and the sulfonated carbon black was placed in ion-exchanged water, stirred, and then filtered. This washing step is repeated until the pH becomes constant. These filtrates were neutralized with 10% aqueous sodium hydroxide, which required 16.9 parts of sodium hydroxide, based on pure substance. This shows that the content of sulfur trioxide adsorbed by the sulfonated pigment is 20.7 parts in terms of sulfuric acid. ...

Embodiment 2

[0061] A sulfonated pigment was prepared in the same manner as in Example 1, except that 100 parts of C.I. Pigment Red 122 (hereinafter "C.I." in the pigment name will be omitted) (average particle diameter: 0.1 μm) was used instead of carbon black paint. In this method, after sulfonation, 24 parts of sodium hydroxide need to be neutralized and washed. This indicates that the content of sulfur trioxide adsorbed by the sulfonated pigment was 29.4 parts in terms of sulfuric acid. After drying, 104.5 parts of sulfonated pigment were obtained. The unit mass of sulfonated pigment contains 3.9% sulfo groups, which means that about 0.15 sulfo groups are incorporated into each molecule of pigment.

Embodiment 3～13

[0063] In the same manner as in Example 1, the yellow pigments, red pigments, blue pigments, purple pigments and black pigments listed in Table 1 were sulfonated. Table 1 lists the sulfonation results. For organic pigments other than carbon black pigments, the number of sulfo groups per molecule of pigment is also given.

[0064] Example

[0065] * : Commercially available from Dainchiseika Color & Chemicals Mfg. Co., Ltd.

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Abstract

A process produces a sulfonated solid particle by burning sulfur to yield gaseous sulfur dioxide, subjecting the gaseous sulfur dioxide to catalytic oxidation to yield gaseous sulfur trioxide, and sulfonating a dry powdery or granular solid particle with the gaseous sulfur trioxide in a gas phase-solid phase reaction.

Description

technical field [0001] The present invention relates to a process for the preparation of sulfonated solid particles, to the sulfonated solid particles, and to compositions containing the sulfonated solid particles. More particularly, it relates to a process for the preparation of sulfonated solid particles, wherein the solid particles are brought into contact with sulfur trioxide gaseously obtained by catalytic oxidation of gaseous sulfur dioxide produced by burning sulfur of. It also relates to the sulfonated solid particles obtained by this process, and their use. Background technique [0002] Usually water-based colorants mainly include water-soluble dyes. For example, many of the inkjet inks are water-based inks, each of which contains a water-soluble dye as a colorant. [0003] However, such dye-based inks are insufficient in light fastness, water fastness and other fastness properties. Therefore, instead of water-soluble dyes, the use of pigment-based colorants suc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/00C07B45/02C09B67/14C09D11/00
CPCC07B45/02C09D11/32C09B67/0017Y10T428/2991C09C1/00
Inventor 中村道卫座间义之冈本久男野上敦坂井尚之小矶英之
Owner DAINICHISEIKA COLOR & CHEM MFG CO LTD
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