field. There are two main ways of modification. One is hydrogenation modification,Petroleum Resin which adds the double bond in the petroleum resin molecule,Petroleum Resin thereby improving its color and anti-oxidation stability. Petroleum resins with special properties can be prepared by adding polar groups or modifiers such as monoolefin to the raw materials.
The removal of the catalyst is a key link in the synthesis of petroleum resins. After the polymerization reaction is completed,Petroleum Resin a qualified polymer solution is obtained. The first thing is to remove the catalyst from the polymer. 3. The ash content is extremely high,Petroleum Resin which has a significant effect on the resin properties. The washing and emulsification of the polymerization liquid and carrying water (acid in the water) cause a long time for the oil and water layer,Petroleum Resin serious corrosion of the equipment in the alcohol washing,Petroleum Resin distillation and alcohol recovery system,Petroleum Resin and the poor product quality, which makes the production difficult to proceed normally. Because Al(OH)3 is insoluble in water and alcohol,Petroleum Resin it is difficult to remove with water, and it is easily adsorbed at the oil-water interface,Petroleum Resin acting as a solid-phase emulsifier, so that the interface between the washing liquid (water phase) and the polymerization liquid (oil phase) is generated. The emulsification phenomenon forms W/O emulsion, which makes the separation of oil and water difficult. In addition,Petroleum Resin C5 petroleum resin has good adhesion. When the reaction tends to end,Petroleum Resin the polymerization solution gradually becomes viscous. When the system is washed and stirred, emulsification is also easy to occur.
Solution: Add quantitative NaOH to the emulsification problem. The key to solving the problem is to solve the problem of emulsification (or polymerization solution with water),Petroleum Resin which can transform water-insoluble Al(OH)3 into water-soluble sodium aluminate or sodium metaaluminate. In actual operation, NaOH is formulated into a 2% to 4% aqueous solution,Petroleum Resin and the amount of NaOH is twice that of AlCl3. In this way,Petroleum Resin it can be ensured that AlCl3 is completely converted into a substance soluble in water and easily removed.
For the problem of catalyst removal, adding demulsifier to completely remove the catalyst,Petroleum Resin or the catalyst using liquid compound AlCl3 can also effectively remove the catalyst.
