Introduction

Column chromatography silica gel is a strong polar solid adsorbent with hydrogen bonding, appearing as white spherical or irregular powder particles. The main component is SiO₂·nH₂O, which is non-toxic and odorless, Its chemical properties are stable, and it does not react with any other substances except strong bases and hydrofluoric acid. It is insoluble in water and organic solvents. It does not react with any other substance and is insoluble in water and organic solvents.

Column chromatography silica gel is a porous material, and its surface is covered with silicon hydroxyl groups, Different components in the mixed system are adsorbed by active site silicon hydroxyl groups in its pores, On these active site silicon hydroxyl groups. solvent molecules, solute molecules and solute molecules in the mixed system compete with each other for adsorption, resulting in the difference of residence time of different components in the column, so as to achieve the purpose of separation and purification.

The raw material is specially customized and produced based on the structural characteristics of column chromatography silica gel, with specific pore size distribution and surface hydroxyl distribution. At the same time, it has the characteristics of high purity and low impurity content, low dissolution of trace and trace impurities, and no pollution to the separated substances, In the production process, the push screen which conforms to the human bionics principle is used to screen out products with uniform particle size distribution, high theoretical plate number, high column efficiency,large peak capacity and high resolution. When in use, the flow rate of both atmospheric and pressurized columns is stable.

Application

This product is mainly used for refining petroleum products to remove aromatic substances, and for selective adsorption and separation of substances with different polarities; Used as a catalyst carrier and chromatographic support; lt can also be used for the separation and purification of effective ingredients in Chinese herbal medicine.

Technical Specifications

Items			Indicators
			Standard Type				Refined Type
			I-ZCX-1	I-ZCX-2	I-ZCX-3	I-ZCX-2	II-ZCX-1	II-ZCX-2	lⅡ-ZCX-3	Ⅱ-ZCX-4
CL	W1%≤		--	--	--	--	0.02	0.02	0.02	0.02
Fe	W1%≤\		--	--	--	--	0.02	0.02	0.02	0.02
PH(100g/L water supens	ion)		6.0-8.0	6.0-8.0	6.0-8.0	6.0-8.0	6.0-7.0	6.0-7.0	6.0-7.0	6.0-7.0
Pb	mg/kg ≤		--	--	--	--	3	3	3	3
As	mg/kg ≤		--	--	--	--	3	3	3	3
Heavy metal(Pb)	mg/kg ≤		--	--	--	--	30	30	30	30
Pore diameter	A		25-35	50-80	80-120	>120	20-35	50-80	80-120	>120
Pore volume	mL/g		0.35-0.45	0.5-0.75	0.8-1.1	>1.1	0.35-0.45	0.5-0.75	0.8-1.1	>1.1
Specific surface area	m²/g		≥600	450-600	320-450	<350	≥600	450-600	320-450	<350
150℃ dry weight loss	W/%	≤	5	5	5	5	3	3	3	3
Qualified size	W/%	≤	>150μm 80		75-150μm 80		50-75μm 60		<50μm 60
Granularity	μm		30-50μm、50-75μm、75-150μm、150-300μm、260-600μm Can also be processed according to the agreed granularity