摘要:
A system for purifying mother liquid steam of polytetrafluoroethylene dispersion liquid comprises a concentration kettle (1), a defoaming pot (2), a gas-liquid separator (3) and a falling film absorption tower (4). A steam exit of the concentration kettle (1) is connected to an entrance of the defoaming pot (2). An exit of the defoaming pot (2) is connected to a feeding port of the gas-liquid separator (3). A gas exit of the gas-liquid separator (3) is connected to the falling film absorption tower (4). A liquid exit of the gas-liquid separator (3) is connected to the concentration kettle (1). A method for purifying mother liquid steam of polytetrafluoroethylene dispersion liquid by using the system is further provided.
摘要:
A system for purifying mother liquid steam of polytetrafluoroethylene dispersion liquid comprises a concentration kettle (1), a defoaming pot (2), a gas-liquid separator (3) and a falling film absorption tower (4). A steam exit of the concentration kettle (1) is connected to an entrance of the defoaming pot (2). An exit of the defoaming pot (2) is connected to a feeding port of the gas-liquid separator (3). A gas exit of the gas-liquid separator (3) is connected to the falling film absorption tower (4). A liquid exit of the gas-liquid separator (3) is connected to the concentration kettle (1). A method for purifying mother liquid steam of polytetrafluoroethylene dispersion liquid by using the system is further provided.
摘要:
An LED panel holder includes a rectangular case (1) comprising a longitudinal groove (1a) on a central portion of back, slots (1d) on one side, hooks (1e) on the other side, the hooks (1e) adapted to lockingly engage with the slots (1d), projecting members (1b, 1c) on top, and recessed members (1b, 1c) on bottom, the recessed members (1b, 1c) being complementary to the projecting members (1b, 1c); and a support assembly (2) comprising an elongated support (2a) releasably secured to the groove (1a), a base (2c) having one end pivotably secured to bottom of the groove (1a), and an arm (2b) having one end adjustably secured to the support (2) and the other end pivotably secured to the other end of the base (2c). The support assembly (2) is adapted to retract into the groove (1a) to render the back of the case (1) to be substantially flat.
摘要:
The present invention provides peroxidic fluoropolyether and a fluorine-containing dispersion obtained from polymerization of fluorine-containing monomers in the presence of peroxidic fluoropolyether as a surfactant. The peroxidic fluoropolyether can be used as surfactant for producing aqueous dispersion of fluorine-containing monomer in place of PFOA or the salts thereof. Thus the amount of PFOA or the salts thereof is reduced and the natural environment is protected. In addition, applying peroxidic fluoropolyether as surfactant and combining it with adjuvants, such as initiator, can induce the reaction moderate and can be beneficial to the polymerization control, thus reducing the amount of initiator or shortening the reaction time.
摘要:
The present invention provides peroxidic fluoropolyether and a fluorin-containing dispersion obtained from polymerization of fluorin-containing monomers in the presence of peroxidic fluoropolyether as a surfactant. The peroxidic fluoropolyether can be used as surfactant for producing aqueous dispersion of fluorin-containing monomer in place of PFOA or the salts thereof. Thus the amount of PFOA or the salts thereof is reduced and the natural environment is protected. In addition, applying peroxidic fluoropolyether as surfactant and combining it with adjuvants, such as initiator, can induce the reaction moderate and can be beneficial to the polymerization control, thus reducing the amount of initiator or shortening the reaction time.