摘要：【中文】本申请公开了一种用于制备环氧丙烷的催化剂，其包含0.05～10wt％的TiO₂、0.5～2.9wt％的M1、0.05～0.5wt％的M2，其余成分为SiO₂；M1为Al₂O₃、SO₃或Cr₂O₃中的至少一种；M2为P、W或Mo中的至少一种。还公开了该催化剂的制备方法，步骤为：(Ⅰ)将硅粉、增塑剂、胶粘剂、调胶剂及M2混合，然后成为成型物，将成型物干燥、焙烧后制得硅条；(Ⅱ)向反应器中加入硅条，并送入钛源进行反应，在用含M1的溶液浸泡，完成浸泡后排空；(Ⅲ)用酸液浸泡并排空后，进行清洗，干燥后即制得该催化剂。该催化剂极大提高中间产物异丙苯与α,α‑二甲基苄醇的纯度，以利于物料的充分使用。该方法能够顺利完成该催化剂的生产。 【EN】The application discloses a catalyst for preparing propylene oxide, which comprises 0.05-10 wt% of TiO₂0.5 to 2.9 wt% of M1, 0.05 to 0.5 wt% of M2, and the balance of SiO₂(ii) a M1 is Al₂O₃、SO₃Or Cr₂O₃At least one of; m2 is P, W or at least one of Mo. Also discloses the catalystThe preparation method of the catalyst comprises the steps of (I) mixing silicon powder, a plasticizer, an adhesive, a glue mixing agent and M2, then forming a forming object, drying and roasting the forming object to obtain a silicon strip, (II) adding the silicon strip into a reactor, feeding a titanium source for reaction, soaking the silicon strip in a solution containing M1, emptying the silicon strip after soaking, and (III) soaking the silicon strip in an acid solution, emptying the silicon strip, cleaning the silicon strip, and drying the silicon strip to obtain the catalyst.

摘要：【中文】本发明公开了一种粒径可控的无溶剂型聚氨酯分散体和水性聚氨酯涂布液，具体涉及分散体及涂布液技术领域，无溶剂型聚氨酯分散体的平均粒径为400~1500μm，固含量为10%~45%；无溶剂型聚氨酯分散体可制成水性聚氨酯涂布液，其固含量为9%~25%，原料重量份为无溶剂型聚氨酯分散体100份，增稠剂0.1~3份，润湿剂0.1~4份，消泡剂0.1~5份，余量为水。本发明旨在控制水性聚氨酯分散体颗粒的粒径大小，使水性聚氨酯分散体仅涂覆在手套外表面，而不渗入手套织物内，并使手套具有良好的柔韧性。本发明的水性聚氨酯涂布液，以保证其能够顺利成膜，且对环境友好，即使长期使用也无毒害。 【EN】The invention discloses a solvent-free polyurethane dispersion with controllable particle size and an aqueous polyurethane coating liquid, and particularly relates to the technical field of dispersions and coating liquids, wherein the average particle size of the solvent-free polyurethane dispersion is 400-1500 mu m, and the solid content is 10% -45%; the solvent-free polyurethane dispersion can be prepared into an aqueous polyurethane coating liquid, wherein the solid content of the aqueous polyurethane coating liquid is 9-25%, the raw materials comprise, by weight, 100 parts of the solvent-free polyurethane dispersion, 0.1-3 parts of a thickening agent, 0.1-4 parts of a wetting agent, 0.1-5 parts of a defoaming agent, and the balance of water. The invention aims to control the particle size of the waterborne polyurethane dispersion particles, so that the waterborne polyurethane dispersion is only coated on the outer surface of a glove and does not permeate into the fabric of the glove, and the glove has good flexibility. The aqueous polyurethane coating liquid ensures that the coating liquid can form a film smoothly, is environment-friendly and has no toxicity even if the coating liquid is used for a long time.