A method for surface modification of heavy calcium carbonate using waste oil
A heavy calcium carbonate and surface modification technology is applied in the field of surface treatment of non-metallic minerals to solve the problems of treatment and utilization, save production costs and increase added value.
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Embodiment 1
[0019] (1) Centrifuge the waste oil to remove suspended solids, dry and dehydrate, and decolorize with active white powder.
[0020] (2) Get 100g of decolorized waste oil, add 50g of water, add 0.4g of sodium dodecylbenzenesulfonate, add 3g of 98% concentrated sulfuric acid, and heat and reflux at 85°C under stirring conditions. After reacting for 4 hours, directly Heating to above 100°C for high-temperature demulsification, after 10 minutes of reaction, pour the hydrolyzed solution into a separatory funnel, and let it stand for stratification.
[0021] (3) Release the water layer, wash the oil layer twice with water, and use a rotary evaporator at 80°C after liquid separation to remove moisture and low-boiling fractions to obtain a modifier for surface modification of heavy calcium carbonate . The acid value of the modifier increased from 0.3349mgKOH / g to 28.8547mgKOH / g.
[0022] (4) Get 100g of heavy calcium carbonate, add 1000g of water, add 4g of a modifying agent synthe...
Embodiment 2
[0024] (1) Centrifuge the waste oil to remove suspended matter, dry and dehydrate, and decolorize with activated clay.
[0025] (2) Get 100g of decolorized waste oil, add 75g of water, add 0.5g of sodium dodecylbenzenesulfonate, add 3g of 98% concentrated sulfuric acid, heat and reflux at 90°C under stirring conditions, react for 4 hours, and directly Heating to above 100°C for high-temperature demulsification, after 10 minutes of reaction, pour the hydrolyzed solution into a separatory funnel, and let it stand for stratification.
[0026] (3) Release the water layer, wash the oil layer twice with water, and use a rotary evaporator at 80°C after liquid separation to remove moisture and low-boiling fractions to obtain a modifier for surface modification of heavy calcium carbonate . The acid value of the modifier increased from 0.3349mgKOH / g to 28.4475mgKOH / g.
[0027] (4) Get 100g of heavy calcium carbonate, add 1000g of water, add 3g of a modifying agent synthesized from was...
Embodiment 3
[0029] (1) Centrifuge the waste oil to remove suspended matter, dry and dehydrate, and decolorize with activated clay.
[0030] (2) Get 100g of decolorized waste oil, add 50g of water, add 0.5g of sodium dodecylbenzene sulfonate, add 3g of 98% concentrated sulfuric acid, heat and reflux at 85°C under stirring conditions, react for 5 hours, and directly Heating to above 100°C for high-temperature demulsification, after 10 minutes of reaction, pour the hydrolyzed solution into a separatory funnel, and let it stand for stratification.
[0031] (3) Release the water layer, wash the oil layer twice with water, and use a rotary evaporator at 80°C after liquid separation to remove moisture and low-boiling fractions to obtain a modifier for surface modification of heavy calcium carbonate . The acid value of the modifier increased from 0.3349mgKOH / g to 32.4599mgKOH / g.
[0032] (4) Get 100g of heavy calcium carbonate, add 1000g of water, add 3g of a modifying agent synthesized by wast...
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Abstract
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