Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of silica used for leather delustering agent and its device

A technology of mixing reactors and mixing parts, applied in the direction of silica, silicon oxide, etc., can solve the problems of insufficient stability of particle extinction, high energy consumption in the post-processing process, and long process flow, etc., to achieve excellent dispersion and low cost , The effect of simple process

Inactive Publication Date: 2013-07-10
北京航天赛德科技发展有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can also maintain the structure under the action of high shear force, and has good transparency, but the oil absorption value is low, the process is long, and the energy consumption in the post-treatment process is high, resulting in high product cost.
[0005] At the same time, when using the liquid phase method to prepare silica, in the process of pulverization, usually a certain amount of lye is added to the reactor first, and then inorganic acid is added under stirring. Mix unevenly with the unreacted alkali metal solution, and there are some materials that cannot be completely neutralized by inorganic acid and alkali, resulting in insufficient stability of the final particle extinction of the product

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of silica used for leather delustering agent and its device
  • Preparation method of silica used for leather delustering agent and its device
  • Preparation method of silica used for leather delustering agent and its device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A mixing reactor, comprising an acid-base mixing part 1, a connecting part 2, a nozzle 3 and a helical accelerator 4; the acid-base mixing part 1 is provided with a hollow mixing chamber, and the mixing chamber is provided with an acid liquid inlet 7 and a lye The inlet 8; the connecting piece 2 is a hollow cylinder with two ends open, one end of the cylinder is screwed to the mixing piece 1, and the other end is screwed to the nozzle 3. The nozzle 3 is a cylinder with more than 3 nozzles 9 at the bottom of the cylinder; the spiral accelerator 4 is installed inside the connector 2 and the nozzle 3, and is a cylinder with a spiral groove 41, and one end of the cylinder is connected to the mixing piece 1 Offset, the other end is offset against the bottom of the cylinder of shower nozzle 3. A type of hemispherical inner groove 42 is provided at both ends of the helical accelerator 4 to provide storage space for the gel, and the inner groove 42 is connected with the helical...

Embodiment 2

[0036] A kind of preparation method of silicon dioxide for leather matting agent, first add 1000ml water in 10L reactor, turn on stirrer and start to stir, and the linear velocity of the stirring paddle in reactor is 8.5m / s. The nozzle of the mixing reactor is set at the opening of the reactor. A 45% sulfuric acid aqueous solution is introduced into the acid liquid inlet of the mixing reactor. The lye inlet is connected to a sodium silicate aqueous solution with a mass ratio of 30%, and the acid pipe and the alkali pipe are opened at the same time. First, adjust the discharge pH value of the nozzle nozzle to 3.5. Aging at ℃ for 2 hours, keeping the pH value during the heating and aging process at 3.5, adding water to cool down to 60 ℃, stirring for 1 hour, filtering and washing the reaction material until the conductivity of the filtrate is 300 μS / cm, drying and pulverizing. The main technical indicators of the obtained product are as follows:

[0037] BET specific surface a...

Embodiment 3

[0043] The method described in Example 1 is used to prepare silicon dioxide for leather matting agent, and the difference from Example 1 is: the acid solution inlet is connected to 25% hydrochloric acid aqueous solution, and the alkali solution inlet is connected to 13% sodium silicate aqueous solution; The pH value is 4.5.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
particle sizeaaaaaaaaaa
adsorption capacityaaaaaaaaaa
Login to View More

Abstract

The invention relates to a mixing reactor and a method for preparing silica used for a leather delustering agent by using the reactor, the mixing reactor comprises an acid-base mixed member, a connecting piece, nozzles and a spiral accelerator; a hollow mixed cavity is provided in the acid-base mixed member, an acid solution inlet and an alkaline solution inlet are provided on the mixed cavity, the connecting piece is a hollow cylinder with two opened ends, the two ends of the cylinder are respectively and movably connected with the mixed member / the nozzle, the nozzle is in a cylindrical shape, more than three nozzles are provided at the bottom of the cylinder; the spiral accelerator is arranged in the connecting piece, and is a cylinder with an opened spiral groove, one end of the cylinder stands against to the mixed member, the other end of the cylinder stands against to the bottom to the nozzle cylinder. The acid solution and the alkaline solution are mixed in the mixing reactor and then added in a reaction kettle for aging. The reactor has the advantages of reasonable design and convenient usage, the obtained product has the merits of high purity, stable performance and good delustring effect.

Description

technical field [0001] The invention relates to a method and equipment for preparing silicon dioxide for leather matting agents, in particular to a method for preparing silicon dioxide for large-aperture leather matting agents with good stability, and a mixing reaction specially designed for implementing the method device. Background technique [0002] With the development of the leather industry, silica is gradually used as a matting agent in the process of leather coating and finishing. At present, the preparation methods of silicon dioxide for leather matting agent mainly include gas-phase method and liquid-phase method. [0003] The silicon dioxide produced by the gas phase method is obtained by hydrolyzing chlorosilane hydrocarbons at high temperature with an oxygen-hydrogen flame. The silicon dioxide prepared by this method has high purity and good transparency when leather is processed, but the price is very expensive, and the amount used in the leather finishing pr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/12
Inventor 操应军郑连营李宝德张忆裴亚利樊新华靳桂茵
Owner 北京航天赛德科技发展有限公司