Abstract: Provided is a method for producing tetrafluoromethane through plasma pyrolysis of waste polytetrafluoroethylene (PTFE). The method includes: subjecting the waste PTFE to a plasma pyrolysis reaction to obtain a pyrolysis product, and subjecting the pyrolysis product to quenching and gas-solid separation in sequence to obtain a pyrolysis gas including the tetrafluoromethane, wherein the plasma pyrolysis reaction is performed at a temperature of 1,800 K to 5,000 K.

Abstract: Provided is a method for producing tetrafluoromethane through plasma pyrolysis of waste polytetrafluoroethylene (PTFE), relating to the technical field of waste recycling. The method of the disclosure includes: subjecting the waste PTFE to a plasma pyrolysis reaction to obtain a pyrolysis product, and subjecting the pyrolysis product to quenching and gas-solid separation in sequence to obtain a pyrolysis gas including the tetrafluoromethane, wherein the plasma pyrolysis reaction is performed at a temperature of 1,800 K to 5,000 K. The method provided by the disclosure has advantages such as a high conversion rate, a short reaction time, a large treatment capacity, high reaction safety, easy product purification, and suitable for continuous industrial scale-up, and can realize the recycling of waste PTFE with a low energy consumption and a low cost. In addition, the method of the disclosure avoids the fluorine waste caused by incineration and leads to a high value-added tetrafluoromethane product.

Abstract: The present invention discloses a process for preparing L-arabinose from Gum Arabic comprising the steps of catalytical hydrolysis of L-arabinose from gum arabic followed by the purification steps including neutralization using alkali, adsorption bleaching, electrodialysis desalination, adsorption separation of impurities and crystallization, with the absolute purity of L-arabinose up to 98% and the recovery as high as 25%˜29% of material weight. The disclosed process has such advantages as low cost, environmental-friendliness and simple operation, showing promising in industrial production.

Abstract: The present invention discloses a process for preparing high-purity raffinose from defatted wheat germ comprising the steps of percolate extraction of raffinose from defatted wheat germ, decoloration by extraction from the abstraction liquid, electrodialysis desalination, impurity removal by simulated moving bed, concentration and crystallization, with the absolute purity of raffinose as high as 98% and the recovery up to 75%. The process is not only reliable and easy to operate, but also easy to realize industrial production and control the parameters.

Abstract: The present invention discloses a process for preparing high-purity raffinose from defatted wheat germ comprising the steps of percolate extraction of raffinose from defatted wheat germ, decoloration by extraction from the abstraction liquid, electrodialysis desalination, impurity removal by simulated moving bed, concentration and crystallization, with the absolute purity of raffinose as high as 98% and the recovery up to 75%. The process is not only reliable and easy to operate, but also easy to realize industrial production and control the parameters.

Abstract: The present invention discloses a process for preparing L-arabinose from Gum Arabic comprising the steps of catalytical hydrolysis of L-arabinose from gum arabic followed by the purification steps including neutralization using alkali, adsorption bleaching, electrodialysis desalination, adsorption separation of impurities and crystallization, with the absolute purity of L-arabinose up to 98% and the recovery as high as 25%˜29% of material weight. The disclosed process has such advantages as low cost, environmental-friendliness and simple operation, showing promising in industrial production.

Abstract: A method for treating conditions or diseases associated with deleterious vasoconstriction of the small arteries and arterioles of one or more organs or parts of a patient's body. In one embodiment, the method comprises administering a therapeutically effective amount of an antagonist to the &agr;2C-adrenergic receptor (&agr;2C-AR) to a patient with Raynaud's Phenomenon. Such method is used to ameliorate the cold-induced or stress-induced vasoreactive response that is associated with Raynaud's Phenomenon. The &agr;2C-AR antagonist is administered to the subject either prior to or after exposure of the patient to the cold or to stressIn another embodiment, the method is used to reduce the extent of deleterious vasoconstriction that occurs in the small arteries, arterioles, and microcirculation of the lungs, heart, kidneys, skin, or gastrointestinal tract of a patient, particularly a scleroderma patient.