Thirdly, CSHs are nontoxic inorganic material made of carbide residue and white carbon black by hydrothermal synthesis method .
In this experiment, calcium silicate hydrates were prepared with carbide residue and white carbon black. Then, it was modified by polyethylene glycol (PEG) to improve the performance of phosphorus recovery.
White carbon black was used as Si sources and purchased from Chongqing Jianfeng Chemical Co.
Preparation of porous calcium silicate hydrates was shown as follows: firstly, the mixture of carbide residue and white carbon black was prepared at the molar ratios of Ca/Si at 1.6: 1.
TABLE 1: Chemical components of carbide residue and white carbon black ((1) carbide residue; (2) white carbon black).
(1) PCSH was synthesized by carbide residue and white carbon black with a dynamic hydrothermal method.
PCSH was synthesized with carbide residue (providing Ca) and white carbon black (providing Si).
Carbide residue and white carbon black were mixed, and the Ca/Si molar ratios were controlled at 1.6:1.
The main phase of PCSH: 110[degrees]C was Si[O.sub.2] (PDF card 18-1169), and this result indicated that carbide residue and white carbon black had not reacted completely.
The effect of acid leaching depends on the calcination degree and will influence the quality of white carbon black directly.
Study on preparation of white carbon black from deoiled residue of oil shale // Mining and Metallurgy.
Hakusui Chemical, whose shares are traded on over-the-counter market in Japan, is an inorganic chemicals producer known for zinc products (such as zinc powders and hydrozincite), titanium oxide and silica powders (white carbon black