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

Method for preparing rosette-like precipitated calcium carbonate

A technology for precipitating calcium carbonate and rosettes, applied in the fields of calcium carbonate/strontium/barium, chemical instruments and methods, calcium/strontium/barium compounds, etc., can solve the problems of complex process, long limestone calcination time, high production cost, etc., and achieve The effect of simple process, broad application prospects and market space, and convenient operation

Active Publication Date: 2016-07-27
GUANGXI SHANDONGLAI CHEM IND TECH CO LTD
View PDF6 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this invention, limestone is calcined for a long time, and various whitening agents are used. One or two of ammonium phosphate and citrate are used as the crystal form control agent, and a dispersant is also used. The process is complicated and the production cost is high.

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
  • Method for preparing rosette-like precipitated calcium carbonate
  • Method for preparing rosette-like precipitated calcium carbonate
  • Method for preparing rosette-like precipitated calcium carbonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Choose hot water at 30°C and add compound additives to the hot water to prepare digested water, wherein the mass of the added compound crystal additive is 0.2% of the mass of medium-burned lime. The composite additive is composed of sucrose and starch, wherein the mass ratio of sucrose to starch is 1:1.

[0030] Mix the medium-burned lime and the prepared digested water at a mass ratio of 1:5, stir, and carry out the digestion reaction. The prepared calcium hydroxide emulsion is filtered through a 100-mesh vibrating screen to remove slag. The calcium hydroxide emulsion obtained by filtering is diluted with water, and adjusted to a specific gravity of 1.065. Before carbonization, a crystal form control agent magnesium chloride is added, wherein the quality of the crystal form control agent magnesium chloride added is 0.2% of the calcium hydroxide mass; The calcium emulsion is sent into the carbonization reaction tower, the kiln gas valve is opened, and the purified kiln ...

Embodiment 2

[0032] Select hot water at 60°C, and add compound additives to the hot water to prepare digested water, wherein the mass of the added compound crystal additive is 0.4% of the mass of medium burnt lime. The composite additive is composed of sucrose and cellulose, wherein the mass ratio of sucrose to cellulose is 5:1.

[0033] Mix the medium-burned lime and the prepared digested water at a mass ratio of 1:7, stir, and carry out the digestion reaction. The prepared calcium hydroxide emulsion is filtered through a 120-mesh vibrating screen to remove residue. The calcium hydroxide emulsion obtained by filtering is diluted with water, and adjusted to a specific gravity of 1.050. Before carbonization, a crystal form control agent magnesium chloride is added, wherein the quality of the crystal form control agent magnesium chloride added is 1.0% of the calcium hydroxide mass; The calcium emulsion is sent into the carbonization reaction tower, the kiln gas valve is opened, and the purif...

Embodiment 3

[0035] Select hot water at 50°C, and add compound additives to the hot water to prepare digested water, wherein the mass of the added compound crystal additive is 0.6% of the mass of medium burnt lime. The composite additive is composed of glyceraldehyde and starch, wherein the mass ratio of glyceraldehyde to starch is 3:1.

[0036] Mix the medium-burned lime and the prepared digested water at a mass ratio of 1:7, stir, and carry out the digestion reaction. The prepared calcium hydroxide emulsion is filtered through an 80-mesh vibrating screen to remove slag. The calcium hydroxide emulsion obtained by filtering is diluted with water, and adjusted to a specific gravity of 1.060. Before carbonization, a crystal form control agent magnesium chloride is added, wherein the quality of the crystal form control agent magnesium chloride added is 1.5% of the calcium hydroxide mass; The calcium emulsion is sent into the carbonization reaction tower, the kiln gas valve is opened, and the ...

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

No PUM Login to View More

Abstract

The invention discloses a method for preparing rosette-like precipitated calcium carbonate. Medium-burned lime is limed in sliming water added with composite additive according to a ratio of 1: (5-10), then the mixture passes through a 60-mesh to 120-mesh vibrating screen for filtration and residue removal, the prepared calcium hydroxide emulsion is added with water for dilution and then is added with a crystal form control agent, then the mixture is delivered into a reaction tower, kiln gas is fed for carbonization to pH smaller than 7.5, then carbonization is stopped, and the precipitated calcium carbonate suspension is dewatered, dried, crushed and screened to obtain the rosette-like precipitated calcium carbonate. The precipitated calcium carbonate prepared by adopting the method disclosed by the invention is rosette-like, has large specific surface area, is good in dispersibility and adhesiveness, is stable in product quality, can be used for papermaking, can effectively improve the bulk, opacity, whiteness and strength of paper, has a wide application prospect and market space, and has better economic benefits and social benefits.

Description

technical field [0001] The invention belongs to the technical field of preparation of precipitated calcium carbonate, and relates to a preparation method of rose-like precipitated calcium carbonate. Background technique [0002] Precipitated calcium carbonate is an inorganic filler with a wide range of uses, widely used in papermaking, plastics, rubber, adhesives, sealants, coatings, paints, inks, medicine, food, etc. Due to different preparation processes, precipitated calcium carbonate may be in different crystal shapes such as cubes, spindles, needles, chains, rosettes, and flakes. [0003] Precipitated calcium carbonate is one of the earliest and most widely used fillers in the rubber industry. It can increase the volume of products, reduce costs, and improve tensile strength, abrasion resistance, and tear strength. In the plastic industry, precipitated calcium carbonate acts as an incremental filler, which can improve the dimensional stability, hardness, rigidity and h...

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 Applications(China)
IPC IPC(8): C01F11/18
CPCC01F11/183C01P2004/03
Inventor 韦健毅朱勇周家添颜干才王权广丁昭源
Owner GUANGXI SHANDONGLAI CHEM IND TECH CO LTD