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Method for preparing silicane fecula

A starch and silane technology, which is applied in the field of silane starch preparation, can solve the problems of uneven contact of modifiers, unstable product quality, and high post-processing costs, and achieve uniform product modification, stable product quality, and short reaction time Effect

Inactive Publication Date: 2008-04-16
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantages of the wet method are mild reaction conditions, simple production equipment, uniform starch modification, and stable quality, but this method has a large amount of wastewater discharge, and the post-treatment cost is high; the advantages of the dry method (mixed) are no three wastes discharge, high reaction efficiency, but Using the spraying production method, the contact between the modifier and the starch is not uniform, so the product quality is not stable

Method used

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  • Method for preparing silicane fecula
  • Method for preparing silicane fecula
  • Method for preparing silicane fecula

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The ratio of raw materials is based on the quality of starch, and the percentages of other raw materials relative to the quality of starch are as follows:

[0015]

[0016]

[0017] The preparation method is as follows:

[0018] Put a certain amount of starch into the fluidized bed, and dry the starch with air at 80-110°C as the drying medium or fluidized medium for 5-20 minutes. After the water content of the starch drops below 5%, switch the temperature to 130°C for nitrogen. After the carrier gas or fluidizing gas is purged for 0.5 to 1 minute, a certain amount of methanol and water are sent to the mixer with a metering pump, so that they are gasified and mixed with nitrogen and enter the fluidized bed to contact with starch. The conveying speed of methanol and water must be maintained until the reaction of the whole formulation amount of dichlorodimethylsilane is completed. After the vaporized methanol and water vapor contact the starch for 2 minutes, use a m...

Embodiment 2

[0020] The ratio of raw materials is based on the quality of starch, and the percentages of other raw materials relative to the quality of starch are as follows:

[0021]

[0022] The preparation method is as follows:

[0023] Put a certain amount of starch into the fluidized bed, use air at 80-110°C as the drying medium or fluidized medium to dry the starch for 5-20 minutes, and after the water content of the starch drops below 5%, switch the temperature to 120°C for nitrogen. After the carrier gas or fluidizing gas is purged for 0.5 to 1 minute, a certain amount of methanol and water are sent to the mixer with a metering pump, so that they are gasified and mixed with nitrogen and enter the fluidized bed to contact with starch. The conveying speed of methanol and water must be maintained until the reaction of the whole formulation amount of dichlorodimethylsilane is completed. After the gasified methanol and water contact the starch for 2 minutes, start to send the dichlo...

Embodiment 3

[0025] The ratio of raw materials is based on the quality of starch, and the percentages of other raw materials relative to the quality of starch are as follows:

[0026]

[0027] The preparation method is as follows:

[0028] Put a certain amount of starch into the fluidized bed, use air at 80-110°C as the drying medium or fluidized medium to dry the starch for 5-20 minutes, and after the water content of the starch drops below 5%, switch the temperature to 110°C for nitrogen. After the carrier gas or fluidizing gas is purged for 0.5 to 1 minute, a certain amount of methanol and water are sent to the mixer with a metering pump, so that they are gasified and mixed with nitrogen and enter the fluidized bed to contact with starch. The conveying speed of methanol and water must be maintained until the reaction of the whole formulation amount of dichlorodimethylsilane is completed. After the vaporized methanol and water contact the starch for 2 minutes, start to send dichlorod...

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Abstract

The present invention relates to a method for preparing a silane starch, especially to a method for preparing the silane starch using dry fluidization method. The invention provides a silane starch with a steady quality and a high efficiency. The invention using the following technical proposal that the feed proportioning is based on the mass of the starch, wherein other raw materials contain from 1.0 percent to 12.0 percent by weight of dimethyldichlorosilane or hexamethyldisiloxane to the mass of the starch, from 0.5 percent to 10.0 percent by weight of methanol to the mass of the starch, and from 5.0 percent to 20.0 percent by weight of water to the mass of the starch.

Description

Technical field: [0001] The invention relates to a preparation method of silane starch, in particular to the preparation of silane starch by fluidized dry method. Background technique: [0002] Starch is a cheap renewable resource. After starch is modified, its performance is greatly improved, which can expand the application field of starch. The research on modified starch abroad has a history of more than 100 years. There are more than a thousand different varieties of modified starch developed and produced, but there is no report about silane starch. At present, the methods for preparing modified starch include wet method, semi-dry method and dry method, and the dry method mainly refers to the mixed dry method. The advantages of the wet method are mild reaction conditions, simple production equipment, uniform starch modification, and stable quality, but this method has a large amount of wastewater discharge, and the post-treatment cost is high; the advantages of the dry ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/00C08K5/5415
Inventor 唐洪波马冰洁孙敏
Owner SHENYANG POLYTECHNIC UNIV
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