可沉淀的

The results indicate that the precipitation rate of phosphoric acid is larger than 99% under the conditions of 2530 ℃, the mole ratio of trimeric cyanamide to phosphoric acid 21, two-step precipitation by trimeric cyanamide divided into two portions and separately stirring 60 min.

研究结果表明：在25~30 ℃、三聚氰胺与磷酸摩尔比为21、三聚氰胺分成两份进行两步沉淀、各搅拌60 min为三聚氰胺沉淀磷酸的最佳条件，在此条件下磷酸沉淀率大于99%；在磷酸三聚氰胺沉淀中夹带的氯化钙在固液质量比15、温度40 ℃和搅拌60 min下用水反复洗涤3次后可被完全去除；再将净化后的磷酸三聚氰胺与氨水反应，制得了符合GB 10205—2001标准的磷酸一铵和磷酸二铵产品。

Gather a sour buffer liquid of the sugar adoption lemon to carry on taking out to lift to the sweet dew in the beer leaven, separate many sugar from ferment a liquid, is precipitate with cold methyl alcohol, get a white thick lift a thing, use the 铵 salt and boric acid of the quarter again with many sugar the formation match with a thing, adding ether to precipitate, getting white and refined sample, average each 50 gs the wet leaven cell can get such refined sweet dew to gather the sugar 0.6 gs, computing with the this kind method withdraw of produce a rate for 1.2%.

对啤酒酵母内的甘露聚糖采用柠檬酸缓冲液进行抽提，从发酵液中分离多糖，以冷甲醇沉淀，得白色粗提物，再用季铵盐和硼酸与多糖形成配合物，加乙醇沉淀，得到白色精制样品，平均每50g湿酵母细胞可得到这样的精制甘露聚糖0.6g，计算出以此种方法提取的产率为1.2%。

In the process of evaporation, under the direction of phase diagram method, the main purpose is how to separate kinds of salt by-product, enrich Lithium, decrease the ratio of Mg/Li. The study shows that the Lithium can be concentrated to about 0.8%, the ratio of Mg/Li can be lowed to 10; In the process of precipitating, in order to separate the left Magnesium and Lithium, a lot of experiments were carried out with the Sodium carbonate or Calcium hydroxide and Sodium Sulfate anhydrate as precipitator of Magnesium, where the separation results were compared, and an optimal separation idea was proposed.

在蒸发阶段中，以相图分析为理论指导，着重研究了如何利用自然能源蒸发卤水，提取有用的镁盐和钾盐，并达到富集锂盐的目的，在此研究中，锂的浓度可富集到0.8％左右，镁锂比可降到10以下；在沉淀阶段中，分别研究了用纯碱、石灰乳和芒硝作为沉淀剂来分离镁锂，比较了分离效果、提出了最佳分离方案。

The experimental results show that: lithium is scatteredly precipitated as natural lithium carbonate in the whole evaporation process, and the highest content of natural lithium carbonate in solid phase is 2.0%, so it is difficult to get the mixed salt with high-grade lithium carbonate; boron is precipitated as borax in the whole evaporation process, and borax is precipitated in large quantity with the highest content of 15.64% in solid phase until the brine is extremely concentrated (CWR≥97.9%) and intergrows closely with typical cold-phase natron; potassium is precipitated as sylvite and aphthitalite in the whole evaporation process with a content from 9.49% to 34.44%.

结果表明：在低温蒸发状态下，锂以天然碳酸锂形式在整个蒸发过程中分散沉淀，固相最高含量仅达2.0%，因此难以获得较高品位的富锂混盐；硼在全蒸发过程中以硼砂形式自然沉淀。当卤水高度浓缩（蒸失率达97.9%以上）时大量析出并与典型冷相矿物泡碱紧密共生，固相中硼砂含量最高可达15.64%；钾以氯化钾和钾芒硝形式沉淀，在蒸发浓缩的全过程中均有不同程度析出，固相含量在9.49%~34.44%之间波动。

The main steps include as follows: CO2 is led into the mother liquor of sodium meta-aluminate to carry out carbon content decomposing; the primary separation between the aluminum and the gallium is realized by primary carbonatation to filter out sodium hydroxide; secondary carbonatation is carried out on the filtrate to obtain the deposit of the complex salt of gallium and aluminum; a sodium carbonate crystal is obtained after the filtered filtrate is condensed and vaporized; the deposit of the complex salt of gallium and aluminum is dissolved in the mother liquor of sodium meta-aluminate; the processes are repeated until the proportion of gallium and aluminum in the complex salt of gallium and aluminum is larger than 1/340; then the complex salt of gallium and aluminum is added into the NaOH liquor and electrolyzed, thus obtaining the metal gallium with a purity larger than 99.9 percent which reaches the level of 3; simultaneously, the byproducts of the aluminum hydroxide and the sodium carbonate during the process of carbonatation by steps are obtained.

主要步骤包括：向铝酸钠母液中通入CO 2 进行碳分分解，一次碳酸化实现铝镓的初次分离；过滤出氢氧化钠，滤液进行二次碳酸化获得镓铝复盐沉淀，过滤后滤液经浓缩蒸发获得碳酸钠晶体，铝镓复盐沉淀溶解在偏铝酸钠母液中，重复上述过程直至铝镓复盐中的镓铝比例大于1/340，将其加入到NaOH溶液中，电解可获得纯度＞99.9％的金属镓，达到3N级水平同时在分步碳酸化的过程中获得氢氧化铝和碳酸钠副产品。

The result shows that dregginess can be checked by blowdown photoelectricity sensor after high density organic waste water enter pool,and dregginess is excluded out of pool by dredg...

结果表明，高浓度有机废水流进沉淀池中，排污光电传感器+排污泵可把检测到的沉淀物排出沉淀池，而池中上清液被浑水光电传感器，清水泵和上浮球把检测到的上清液水排入过滤装置内进行过滤，随后加入絮凝剂进行沉淀分离，再经消毒以达到二次水利用的目的成为现实。

The effects of solution\'s pH value, mol ratio between phenyl aldehyde and L-Arginine, concentrations of sodium chloride, ammonia chloride andL-Lystine, initial concentration of L-Arginine on precipitation rate of a -tolylene arginine were investigated, the results indicated that phenyl aldehyde precipitation method\'s appropriate pH value was higher than 11, suitable mol ratio between phenyl aldehyde and L-Arginine was 1.25, initial concentration of L-Arginine was must higher than 15g/L, sodium chloride had little effect on precipitation rate, on the contrary, ammonia chloride and L-Lystine had great effect on it, both of them must be eliminated; At the same time, adsorption isotherm at 25 C of L-Lystine on anion exchange resin A was measured, the result showed that the maximal equilibrium adsorbance was 30mg/g, the influences of solution\'s pH value, temperature, concentration of chloride ion on adsorption of L-Lystine by anion exchange resin A were also studied, the results indicated that appropriate operational pH value was 0.5 0.2, the effect of temperature on adsorption ratio was little, process could be operated at room temperature, the concentration of chloride ion must be eliminated.

考察了溶液pH值、苯甲醛与L-精氨酸摩尔比、氯化钠与氯化铵浓度、L-赖氨酸浓度、L-精氨酸初始浓度对苯甲醛沉淀L-精氨酸的影响，结果表明，沉淀反应的适宜pH值大于11，苯甲醛与L-精氨酸的适宜摩尔比为1.25，(来源：Aa6BC论文网www.abclunwen.com)L-精氨酸适宜的初始浓度在15g/L以上，氯化钠的存在对沉淀率基本上没有影响，而氯化铵和L-赖氨酸的存在使沉淀率下降；同时测定了25℃时阴离子交换树脂A吸附L-赖氨酸的吸附等温线，表明其最大平衡吸附量为30mg/g，考察了溶液pH值、温度、氯离子浓度对阴离子交换树脂A吸附脱除L-赖氨酸的影响，结果显示从L-精氨酸和L-赖氨酸混合液中吸附分离出L-赖氨酸的适宜pH值为10.5±0.2，温度对L-赖氨酸吸附率影响不大，吸附过程可在室温下进行，氯离子的存在使L-赖氨酸的吸附率降低。

Then gel filtration, positive ion resin absorption and isoelectric deposition were applied for polysialic acid purification process. The purity of polysialic acid was above 90 % with neutralisation deposition method and the recovery yield of polysiac acid was 55.8%.

探讨了凝胶过滤法、阳离子树脂吸附法、中和沉淀法进一步纯化聚唾液酸的工艺，其中中和沉淀法可使聚唾液酸纯度达到91.5%，回收率为55.8%。

Despite NH_3·H_2O is consumed in chemical reaction,(NH_4)2SO_4 can be reclaimed for the chemical fertilizer or ammonia, and ammonia can be recycled as precipitating agent.

反应过程中虽然消耗了氨水，但溶液中的(NH_4)2SO_4可回收用做肥料，也可回收氨，回收氨可返回用做沉淀剂，合理利用了资源。

Stoneworts contain calcium carbonate deposits so extensive that they may form the major part of lake bottoms.

轮藻形成碳酸钙沉淀，这些沉淀可形成湖泊钙质泥灰岩的主要成分。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。