Study of Preparation and the Influencing Factors of Chrysanthemum-Shaped Calcium Carbonate Applied to Paper Industry

2012 ◽  
Vol 621 ◽  
pp. 111-116 ◽  
Author(s):  
Ze Li Chen ◽  
Hua Jing Zhu
Keyword(s):  
Calcium Carbonate ◽  
Influencing Factors ◽  
Shape Control ◽  
Paper Industry ◽  
Carbon Dioxide Concentration ◽  
Control Agent ◽  
Optimum Conditions ◽  
Precipitated Calcium Carbonate ◽  
Carbonation Process ◽  
Carbonate Filler

This paper describes the precipitated calcium carbonate filler applied to paper industry, which was prepared by adding a specific crystal control agent. And a series of influencing factors in carbonation process was studied, such as carbonization temperature, concentration of milk of lime, carbon dioxide concentration and the crystal shape control dosage. Therefore the optimum conditions for preparation of chrysanthemum-shaped crystalline calcium carbonate were determined.

Novel calcium carbonate filler for cellulose industry

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Mostafa Nikkhah Dafchahi ◽  
Hossein Resalati ◽  
Seyed Majid Zabihzadeh ◽  
Noureddin Nazarnezhad ◽  
Ghasem Asadpour ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Corn Starch ◽  
Paper Industry ◽  
Precipitated Calcium Carbonate ◽  
Burnt Lime ◽  
Carbonation Process ◽  
Carbonate Filler ◽  
Ft Ir ◽  
Mineral Fillers ◽  
Slight Amount

Abstract Precipitated calcium carbonate (PCC) filler is used in many industrial products like constructions, plastics, pharmaceutics, etc. In this study producing cationic precipitated calcium carbonate filler for paper industry was investigated. Hence, a cationic polyacrylamide and cationic corn starch have been incorporated into the PCC particles to produce a modified filler with cationic structure and improved hydrogen bonding ability with cellulose fibers. According to the FESEM and XRD results, cubic-like fillers with prominently calcite polymorph and a slight amount of aragonite were successfully produced from the industrial burnt lime using carbonation process. The presence of organic substances in the structure of the modified samples was confirmed by FT-IR analysis. Besides, based on the FESEM results, filler morphology and particle size could be affected by the polymer content. In conclusion, introducing cationic groups to mineral fillers could be considered as a possible strategy to overcome some detrimental effects of using mineral fillers in paper products.

Effect of Several Factors on the Synthesis of Calcium Hydroxide Prepared by Spray Drying Method Using Limestone

2007 ◽  
Vol 544-545 ◽  
pp. 733-736
Author(s):  
Moon Kwan Choi ◽  
Jin Sang Cho ◽  
Sung Min Joo ◽  
Jin Koo Park ◽  
Ji Whan Ahn ◽  
...  
Keyword(s):  
Particle Size ◽  
Calcium Carbonate ◽  
Spray Drying ◽  
Feeding Rate ◽  
Spherical Shape ◽  
Initial Reaction ◽  
Outlet Temperature ◽  
Drying Method ◽  
Precipitated Calcium Carbonate ◽  
Carbonation Process

The purpose of this work is to influence of CaO concentrations of 5.0 wt.% and 10.0 wt.%, slurry feeding rate of 200~400 /min, rotating rate of drum of 5,000 and 10,000 rpm, inlet and outlet temperature on the synthesis of Ca(OH)2 powder, and the synthesis of precipitated calcium carbonate by carbonation process using Ca(OH)2 prepared by spray drying method. As the feeding rate of slurry was increased, the particle size of Ca(OH)2 was decreased. Regardless of rotating rate of drum, when the concentration of CaO was 5.0 wt.% and 10.0 wt.%, the morphology of Ca(OH)2 showed spherical shape of 10~30 μm and 20~60 μm, respectively. The specific surface area of synthesized Ca(OH)2 was 27~30 m2/g. When the initial reaction temperature was 11 °C and 30 °C, the shape and particle size of precipitated calcium carbonate synthesized in the carbonation process showed the rectangular shape of 0.1~0.4 μm and the spindle shape of 0.5~1.0 μm, respectively.

Synthesis of nano precipitated calcium carbonate by using a carbonation process through a closed loop reactor

2016 ◽  
Vol 68 (1) ◽  
pp. 131-137 ◽  
Author(s):  
Thenepalli Thriveni ◽  
Ji Whan Ahn ◽  
Chilakala Ramakrishna ◽  
Young Jun Ahn ◽  
Choon Han
Keyword(s):  
Calcium Carbonate ◽  
Closed Loop ◽  
Precipitated Calcium Carbonate ◽  
Loop Reactor ◽  
Carbonation Process

The Role of Crystal Control Agent in the Formation of Needlelike Calcium Carbonate Nano Particles

2011 ◽  
Vol 236-238 ◽  
pp. 2150-2159
Author(s):  
Yu Qian Ye ◽  
Xue Mei Chen
Keyword(s):  
Calcium Carbonate ◽  
Aspect Ratio ◽  
Crucial Role ◽  
Average Diameter ◽  
Morphological Characterization ◽  
Control Agent ◽  
Nano Particles ◽  
Precipitated Calcium Carbonate ◽  
Nanometer Particles

In this work, needlelike precipitated calcium carbonate (PCC) nanometer particles were synthesized by industrial carbonation route using EDTA as crystal control agent. The morphological characterization shows that the as-synthesized needlelike PCC particles have an average diameter of 52 nm and an aspect ratio of around 14:1. The results indicate that EDTA plays a crucial role in the formation of needlelike PCC nanometer particles. A possible mechanism for the formation of needlelike PCC particles assisted by the crystal control agent EDTA is also proposed.

End Group Effects in Polymer Modification of Calcium Carbonate Fillers

1985 ◽  
Vol 58 (1) ◽  
pp. 107-116 ◽  
Author(s):  
Takuo Nakatsuka ◽  
Hitoshi Kawasaki ◽  
Shinzo Yamashita
Keyword(s):  
Calcium Carbonate ◽  
Gel Permeation Chromatography ◽  
Polymer Modification ◽  
Coupling Effects ◽  
Precipitated Calcium Carbonate ◽  
Alkyl Groups ◽  
Bet Analysis ◽  
Scanning Electron Micrography ◽  
Carbonate Filler ◽  
End Group

Abstract Two types of polymer, e.g., polybutadiene and poly(oxy-2-butenyleneoxyfumaroyl), having four different end groups, were prepared and used to treat ground and precipitated calcium carbonate fillers. The coupling effects of the polymer modifiers were evaluated from the physical properties of the filler-loaded vulcanizates of sulfur-cured SBR and peroxide-cured EPDM. The phosphate-terminated polymer was found to be an excellent surface modifier of the ground calcium carbonate filler. For the precipitated calcium carbonate filler of superfine grade, higher coupling effects were attained by the phosphates having relatively small alkyl groups. The modification mechanism is also discussed by taking into account the results of infrared spectroscopy, x-ray analysis, gel permeation chromatography, scanning electron micrography, and BET analysis.

Change of Formation Yield and Characterization of PCC Particle Synthesized with Impurity Ions Contents by Carbonation Process

2006 ◽  
Vol 510-511 ◽  
pp. 1026-1029
Author(s):  
Jin Sang Cho ◽  
Sung Min Joo ◽  
Sang Hwan Cho ◽  
Young Hwan Yu ◽  
Im Ho Kim ◽  
...  
Keyword(s):  
Particle Size ◽  
Calcium Carbonate ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Precipitated Calcium Carbonate ◽  
Carbonation Process ◽  
Crystal Properties ◽  
Impurity Ions

The effect of the impurity ions Al3+, Fe3+ and Mg2+ on the formation yield and crystal properties of precipitated calcium carbonate(PCC) produced by the carbonation process was investigated in Ca(OH)2-H2O-CO2 system. The effect of the impurity ions Al3+, Fe3+ and Mg2+ on the formation yield using particle size distribution and morphology of PCC were discussed. The particle size distribution of PCC was increased with increase of impurity ions. The morphology was transformed in order of spheroidal, scalenohedral, rhombohedral calcite for Al3+, Fe3+ and rhombospheroidal, spherical, scalenohedral for Mg2+ with increase of impurity ions.

Filler Pigments Designed for Recyclability

1992 ◽  
Vol 266 ◽  
Author(s):  
June D. Passaretti ◽  
Trudy D. Young ◽  
Mick J. Herman ◽  
D. Bruce Evans
Keyword(s):  
Particle Size ◽  
Calcium Carbonate ◽  
Particle Size Distribution ◽  
Physical Properties ◽  
Size Distribution ◽  
Paper Industry ◽  
Precipitated Calcium Carbonate ◽  
Recycled Paper ◽  
New Material ◽  
The Cost

AbstractThis paper discusses the use of a new rhombohedral precipitated calcium carbonate (PCC) morphology and existing PCC morphologies in wood free, wood containing, and recycled paper. The new material has properties that mimic TiO2 with respect to morphology, particle size, particle size distribution, and surface area. TiO2 is widely used by the paper industry as a functional filler for opacity and brightness. The new PCC rhombohedral morphology can be used in place of TiO2 for many applications greatly reducing the cost of production.The physical properties of the new PCC morphology as well as application as a paper filling pigment will be discussed.

The Effect of Initial Hydration Temperature on the Characteristics of Calcium Hydroxide and Aragonite Precipitated Calcium Carbonate

2007 ◽  
Vol 124-126 ◽  
pp. 815-818 ◽  
Author(s):  
Ji Whan Ahn ◽  
Jung Ah Kim ◽  
Kwang Suk You ◽  
Hwan Kim ◽  
Hee Chan Cho ◽  
...  
Keyword(s):  
Particle Size ◽  
Calcium Carbonate ◽  
Calcium Hydroxide ◽  
Initial Temperature ◽  
Process Condition ◽  
Hydration Process ◽  
Hydration Time ◽  
Precipitated Calcium Carbonate ◽  
Solid Ratio ◽  
Carbonation Process

Precipitated Calcium Carbonate (PCC) is obtained through three processes; that of calcination, hydration, and carbonation. Thus, changes in each process condition determine the particle size or morphology of the mediums (calcium oxide and calcium hydroxide) as well as the product (PCC). To date, studies concerning precipitated calcium carbonate have mainly focused on the carbonation process, aimed at the manufacturing of PCC. Thus far, few studies on calcination or hydration have been conducted. Calcium hydroxide is regarded as the most important factor during the carbonation process. It is obtained through a hydration process. Therefore, in order to create the valuable PCC studies that center on the hydration process should be carried out. The present study seeks to investigate the effect of the hydration condition, particularly the temperature, on the synthesis characteristics of calcium hydroxide and aragonite PCC. The results show that the particle size of calcium hydroxide changes with variations in the initial hydration temperature. In particular, a higher initial temperature resulted in a larger particle size of the calcium hydroxide used in the synthesis. The particle size and yield of aragonite also increased when calcium hydroxide created at high temperatures was used. However, the water/solid ratio or total amount at the hydration time had no effect on the manufacturing process of aragonite.

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