228results about How to "Improve copolymerization performance" patented technology

Disclosed is a water- and oil-repellent agent comprising the following fluorine-containing copolymer (A). The fluorine-containing copolymer (A) comprises: (a1) a fluoroalkyl group-containing polymerizable monomer of the formula:  wherein Y is a divalent organic group [for example, an aliphatic group having 1 to 10 carbon atoms, an aromatic or cycloaliphatic group having 6 to 10 carbon atoms, a —SO2N(R1)R2— group (in which R1 is a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and R2 is an alkylene group having 1 to 10 carbon atoms), a —CON(R1)R2— group (in which R1 is a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and R2 is an alkylene group having 1 to 10 carbon atoms), or a —CH2CH(OY1)CH2— group (in which Y1 is a hydrogen atom or an acyl group having 1 to 4 carbon atoms)]; and  Rf is a linear or branched fluoroalkyl or fluoroalkenyl group having 1 to 6 carbon atoms; and (a2) vinylidene chloride.

The invention relates to a copolymerization flotation-sedimentation tank. The copolymerization flotation-sedimentation tank comprises a multi-channel folded plate copolymerization flocculation basin, a flotation-sedimentation tank and an air dissolving system, wherein the multi-channel folded plate copolymerization flocculation basin is used for realizing the coagulation and the copolymerization of flocculates and microbubbles; the flotation-sedimentation tank is connected to the rear end of the multi-channel folded plate copolymerization flocculation basin and is used for separating foamed flocculates from water flow and precipitating settleable flocculates which cannot float; and the air dissolving system is connected with a water outlet end of the flotation-sedimentation tank and is connected with the multi-channel folded plate copolymerization flocculation basin and the flotation-sedimentation tank to supply high-pressure backflow gas dissolved water to the multi-channel folded plate copolymerization flocculation basin and the flotation-sedimentation tank. According to the copolymerization flotation-sedimentation tank, the high-pressure backflow gas dissolved water is fed for three times, by virtue of organic combination with a flocculation process, a microbubble and flocculate copolymerized environment is created, and the produced foamed flocculates are stable and are not easily separated, so that the problems that the adhesion efficiency of particles is low, the trapping effect is not ideal, the adhesion of the foamed flocculates is instable, and the like of a traditional dissolved air flotation process are solved, and the coagulation, air floatation and sedimentation processes are organically combined and integrated; and the copolymerization flotation-sedimentation tank has prominent superiority in the treatment of water quality in high-algae, low-turbidity and burst high-turbidity reservoirs.

This invention provides an olefin polymerization catalyst active component suitable for ethene polymerization or copolymerization reaction of ethene and alpha-olefin and a catalyst containing said active component, which introduces electronic compound and halohydrocarbon into an active component containing Ti to get a high-active olefin polymerized catalyst. When carrying out olefin polymerrization by the catalyst prepared in such method, one can get the polymer in large density and resin in good size.

The invention relates to a supported vanadium alkene polymerization catalyst, which comprises a porous inorganic carrier, a catalyst composite modifying component, a vanadium containing component, and a catalyst activating component; wherein the catalyst composite modifying component is the product of high temperature burning of a first soluble compound and / or a second soluble compound, and the vanadium containing component is the product of high temperature burning of a third compound. Compared with the conventional Ziegler-Natta vanadium catalysts, the provided supported vanadium alkene polymerization catalyst has the advantages of higher and more stable activity, wider range of polymerization temperature, and excellent copolymerization performance.