摘要：【中文】本发明公开了一种消失模用铸造铝硅合金水基环保涂料及其制备方法，该消失模用铸造铝硅合金水基环保涂料包括耐火基材、锂基膨润土、羧甲基纤维素钠CMC、硅溶胶、润湿分散剂JFC、聚醋酸乙烯、聚乙烯醇、磷酸三丁酯、五氯酚钠和水。该消失模用铸造铝硅合金水基环保涂料具有优异的吸着性和稳定性，同时该制备方法具有工序简单和操作简便的优点。 【EN】The invention discloses a casting aluminum-silicon alloy water-based environment-friendly coating for a lost foam and a preparation method thereof. The casting aluminum-silicon alloy water-based environment-friendly coating for the lost foam has excellent adsorbability and stability, and the preparation method has the advantages of simple process and simplicity and convenience in operation.

摘要：【中文】本发明公开了一种黄铜铸造消失模用醇基环保涂料及其制备方法，由如下重量份的原料制备而成：耐火基材100重量份，钠基膨润土4～6重量份，CMC 0.5～1.5重量份，硅溶胶5‑8重量份和聚丙烯酰胺1～3重量份，黄原胶0.2重量份，采用40～80重量份的醇类作载液，润湿分散剂6～8重量份，消泡剂0.9～1.5重量份，防腐剂0.01～0.03重量份，所述涂料颗粒目数均≥200目。利用本申请中制备的消失模涂料可显著减少消失模铸造黄铜件发生孔洞、裂纹、留痕的现象，具有良好的透气性、涂挂性、足够的强度、发气量小、低温干燥速度快等诸多优点。 【EN】The invention discloses an alcohol-based environment-friendly coating for a brass casting lost foam and a preparation method thereof, wherein the alcohol-based environment-friendly coating is prepared from the following raw materials in parts by weight: 100 parts of refractory base material, 4-6 parts of sodium bentonite, 0.5-1.5 parts of CMC, 5-8 parts of silica sol, 1-3 parts of polyacrylamide and 0.2 part of xanthan gum, wherein 40-80 parts of alcohols are used as carrier liquid, 6-8 parts of wetting dispersant, 0.9-1.5 parts of defoaming agent and 0.01-0.03 part of preservative, and the mesh number of the coating particles is more than or equal to 200 meshes. The lost foam coating prepared in the application can obviously reduce the phenomena of holes, cracks and marks of a brass piece cast by the lost foam, and has the advantages of good air permeability, good coating property, enough strength, small gas evolution, high low-temperature drying speed and the like.

摘要：【中文】本发明公开一种头孢氨苄结晶母液回收方法，15‑40℃搅拌下，碱性调节剂加入到头孢氨苄结晶母液中，保持pH值7‑8，加入裂解酶进行头孢氨苄裂解反应，固液分离，将酸性调节剂加入到清液中，调pH值至6‑7，并降温至5‑10℃，使苯甘氨酸沉淀析出，固液分离，将酸性调节剂加入到清液中，调pH值至3‑4并升温至20‑40℃，获得7‑氨基去乙酰氧基头孢烷酸结晶产品。本发明通过冷却结晶，将裂解液中的苯甘氨酸优先结晶分离，其纯度>99％，收率5％左右，得到的7‑氨基去乙酰氧基头孢烷酸纯度>99％，回收率90％以上。本发明未引入水和VOC物质，对环境无污染，实现了结晶母液的清洁化回收，分离回收效率高。 【EN】The invention discloses a method for recovering cefalexin crystallization mother liquor, which comprises the steps of adding an alkaline regulator into cefalexin crystallization mother liquor under stirring at 15-40 ℃, keeping the pH value to be 7-8, adding lyase to carry out cefalexin cracking reaction, carrying out solid-liquid separation, adding an acidic regulator into clear liquid, regulating the pH value to be 6-7, cooling to 5-10 ℃, precipitating phenylglycine, carrying out solid-liquid separation, adding the acidic regulator into the clear liquid, regulating the pH value to be 3-4, heating to 20-40 ℃, and obtaining a 7-aminodeacetoxy cephalosporanic acid crystallization product. According to the invention, phenylglycine in the lysate is preferentially crystallized and separated through cooling crystallization, the purity is more than 99%, the yield is about 5%, the purity of the obtained 7-aminodesacetoxycephalosporanic acid is more than 99%, and the recovery rate is more than 90%. The invention does not introduce water and VOC substances, has no pollution to the environment, realizes clean recovery of the crystallization mother liquor and has high separation and recovery efficiency.