40results about How to "Increase chlorine content" patented technology

The invention discloses a method for preparing chlorinated polyvinyl chloride resin. The invention adopts water or hydrochloric acid as the suspending medium, and polyvinyl chloride is suspended in the liquid phase with a solid content (wt) not higher than 30%. Control the chlorine flow rate and chlorination reaction temperature of the three stages of chlorination, and pass chlorine gas that does not exceed 20% of the theoretical chlorine content to make the chlorine content of the resin reach 66-70%. After acid filtration, neutralization, water washing, and centrifugation , drying, to obtain high heat-resistant stability suitable for the production of corrosion-resistant, high-temperature pipe resin.

The invention provides a separation and purification method of desulfurized gypsum and the implementation thereof to upgrade the quality of the desulfurized gypsum. The method is to add alcoholic foaming agent and hydrophobic collector into the desulfurized gypsum slurry in the stirring condition. The equipment for the implementation comprises the collector injection unit and the foaming agent injection unit. The outlet of the collector injection unit is connected to the desulfurized slurry pond; the outlet of the foaming agent injection unit is connected to the oxidized air transmission pipe. The invention applies the principle of dissolved air floating, combines the black gel debris and hydrophobic collector, and combines the hydrophobic base of the foam generated by the foaming agent and the hydrophobic base on the surface of the black gel debris, wherein the bubble takes the black debris to the liquid top layer to make the black debris detached from the desulfurized gypsum slurry. The removal rate of the black gel debris is higher than 90%, which guarantees the dehydration effects of the desulfurized gypsum slurry and enhances the purity and whiteness of the desulfurized gypsum and improves the quality of the desulfurized gypsum.

The invention relates to a device and method for preparing calcium hypochlorite, calcium chlorate and calcium perchlorate, relates to the technical field of chemical industry, and provides a device and method for resourceful treatment of wastewater. The device for preparing the calcium hypochlorite, the calcium chlorate and the calcium perchlorate comprises a first-stage electro-oxidation unit, asecond-stage electro-oxidation unit and a third-stage electro-oxidation unit, wherein different solutions are respectively electro-oxidized through the three stages of electro-oxidation units; the next stage of electro-oxidation unit is used for electro-oxidizing products of the previous stage of electro-oxidation unit to separately obtain a calcium hypochlorite solution, a calcium chlorate solution and a calcium perchlorate solution, and thus, a purpose of increasing the content of chlorine is achieved; and in addition, the calcium chloride raw materials in the invention are wide, and particularly, calcium chloride high-salt waste liquid generated in chemical production can be used as a raw material, so that resource utilization is further realized, and the problem of calcium chloride waste water discharge is solved.

The invention discloses a method for producing shaping paraffin serving as polyurethane foam crack filler.The method comprises the following steps of adding heavy liquid wax and light liquid wax into a reaction kettle, and stirring the materials to be uniform, so that reaction materials are obtained; introducing chlorine into the reaction kettle, and controlling the reaction temperature; after the reaction materials react with the chlorine for a while, detecting the density and viscosity of chlorinated paraffin, and then blowing off hydrogen chloride gas; then detecting the acid value, and then adding compound heat stabilizer, so that the shaping paraffin is obtained.The method has the advantages that the produced shaping paraffin is high in chlorine content, as a result of increase of the chlorine content, the viscosity of the polyurethane foam crack filler can be increased accordingly, and thereby the phenomena that when the polyurethane foam crack filler is used under the condition of low temperature and low humidity, the completely dry speed is low, obtained foam is low in viscosity and thus cannot support a framework of the foaming volume, obtained foam is made to flow out and cannot expand in a space where gluing is predicted to be conducted are avoided.

The present invention relates to a polypropylene preparation method for preparing chlorinated polypropylene with high chlorination rate; adding 3-20mmol alkyl aluminum hexane solution to 1000ml linear saturated alkane or linear saturated alkane mixture; adding 0.1- 0.5g catalyst / ml linear saturated alkanes or linear saturated alkanes mixture; 10-150μl orthosilicate compound / g catalyst, 10-150μl nitrogen-containing heterocyclic compound / g catalyst, feed propylene / hydrogen mixed gas; The catalyst is Ziegler-Natta catalyst; the linear saturated alkane is hexane or octane; the linear saturated alkane mixture is a mixture of nonane and decane; the nitrogen-containing heterocyclic compound is 2,2,6,6-tetramethyl Pyridine: The melt index of the polypropylene is 20-50g / 10min, the isotacticity is 91-95%, the crystallinity is 40-54%, and the bulk density is greater than 0.38g / cm3.

The present invention relates to the design and synthesis method of adsorbing resin, and by means of special polymerization method, small crosslinked polystyrene ball is made to possess proper geometric features and maximized function. By means of proper design, the synthesis steps are reduced, and functional radical contains special reactive functional groups capable of adsorbing noble metal. One functional molecule contains four adsorbing groups. The obtained adsorbent has excellent noble metal adsorbing performance and selectivity under different pH conditions, and may be used in the adsorption and recovery of noble metal in different fields.

The invention discloses a reaction system and method for batch production of chlorinated polyvinyl chloride. The reaction system mainly includes a liquid chlorine vaporizer, a chlorine gas buffer tank, an activation reactor and a chlorination reactor. A chlorine buffer tank is connected, and an activation reactor is connected to the chlorination reactor. The reaction system of the present invention is not only suitable for the gas-solid phase chlorination reaction of polyvinyl chloride, but also suitable for the gas-solid phase chlorination reaction of other powders. It can not only be used as a chlorination reaction system alone, but also can be combined with other chlorination systems. Used together, it has good flexibility of use. The reaction system and method for intermittently producing chlorinated polyvinyl chloride of the present invention are low in cost, high in product quality, easy to control in operation, high in energy utilization rate, reduced in production cost, and can increase the chlorine content in chlorinated polyvinyl chloride to 65%. above.

The present invention relates to a method for preparing a poly-alpha-olefin base oil, comprising the following steps: S1, at a temperature of 50° C. to 120° C., a pressure of 0.1 to 1.0 MPa, and a volume ratio of alpha-olefin to solvent of 1:0 to 1:1 condition, with Cr-AlCl 3 / Al 2 O 3 The solid-supported catalyst catalyzes the oligomerization reaction of the α-olefin mixture for 3 to 8 hours; S2, after the reaction is stopped, the catalyst is filtered, washed with distilled water, the solvent is removed by atmospheric distillation, and the unreacted α-olefin and some α-olefin dimerization are removed by vacuum distillation After hydrogenation, polyα-olefin base oil is obtained. The present invention also relates to polyalpha-olefin base oils prepared by the above method. The PAO base oil prepared by this method needs a kinematic viscosity of 30-40mm at 100℃ 2 PAOs in the / s viscosity range do not need to be mixed with low-viscosity PAO oils, which can greatly reduce the volatility of lubricating oils.

A preparation method of CPVC resin by a water-phase suspension method belongs to the field of a CPVC preparation technology. The preparation method is characterized in that ultrasonic wave at specific frequency is selected and has an effect of dispersing PVC resin. At this frequency of ultrasonic wave, it can be ensured that PVC resin is uniformly dispersed in an aqueous suspension system; and by utilization of energy effect and chemical effect of ultrasonic wave, deep chlorination and chlorination uniformity are guaranteed and structure defect of CPVC resin is reduced. The prepared CPVC resin has high chlorine content and ageing whiteness, good initial coloration, long dynamic thermal stable time, and good processing plasticizing performance.

The invention discloses a vinyl chloride copolymer emulsion for water-based anticorrosion coatings and a preparation method thereof, comprising the steps of: adding deionized water, vinyl chloride, allyl chloride, isobutyl vinyl ether, maleic anhydride, Emulsifier and reducing agent, stir and heat up to 45-60°C, then continuously drop ammonium persulfate initiator aqueous solution to start polymerization, continuously add vinyl chloride during polymerization, control the speed of vinyl chloride addition, and maintain the pressure of the polymerization system ± 0.1 kg / cm 2 , continue to polymerize until the pressure of the system drops by 0.5-2.0kg / cm after adding vinyl chloride 2 When the temperature is lowered, the polymerization is terminated, unreacted monomers are removed, and a vinyl chloride copolymer emulsion is obtained. The present invention increases the chlorine content of the copolymer by introducing the addition amount of propylene chloride monomer and isobutyl vinyl ether, and at the same time introduces maleic anhydride, the caking monomer, so that the obtained vinyl chloride copolymer can be used to prepare the vinyl chloride copolymer with good anticorrosion effect and Adhesive water-based paint.