查询词典 catalyst

Producted RF and CRF aerogels by process of sol-gel technics, dynamic-exchange, CO2 supercritical drying, and procedural increase in temperature carbonization methods, which have eximious capability and nanometer network structure; Systemic analysis various factors which effect gel course, such as ratio of reactants and the dosage of catalyst, and probed into the better experiments conditions(the concentration of resorcinol and formaldehyde is more than 2% and the value of R/C is between 50 and 300); During gel course , primary investigated the viscosity curve and particle size distribution of sol-solution, and analyzed the reason of catalyst dosage effects particle size of gel, and confirmed that the up-growth of gel follows the theory of " polymerize increase ".The experiment results indicated that ultrasonic with unvarying temperature disposal shortened gel time and optimized quality of gels, and the factors of ultrasonic effect gel reaction velocity were analyzed; Prepared organic aerogels using compounds of resorcin and hydroquinone substitute resorcinol reacts with formaldehyde the first time, and also optimized the proportion of resorcinol and hydroquinone (the proportion of hydroquinone in 10%～40%).

采用溶胶-凝胶工艺结合动态溶剂交换、CO2超临界流体干燥与程序升温碳化方法制备出性能优良、具有纳米网络结构的RF与CRF气凝胶；深入研究了反应物配比催化剂用量等条件对凝胶过程的影响，得到了较佳的RF凝胶制备条件(RF浓度应大于2%，R/C值取50～300)；初步研究了凝胶过程中的粘度、粒径变化情况，分析了催化剂用量影响凝胶中粒子尺度的原因，在实验上印证了凝胶生长遵循"聚增长"的理论；通过引入超声波改进了RF气凝胶的制备工艺，缩短了凝胶反应时间，提高了凝胶品质，并探讨了超声波促进RF凝胶反应作用的原因；首次用对苯二酚与间苯二酚复配制备了混合有机气凝胶，优化出复配比(对苯二酚含量为10%～40%)。2。

A solid acid catalyst of outstanding performances has been produced with this technology utilizing amylose, glucose and saccharose abounding in the nature through simple burning and sulfonation processes. This catalyst is insoluble in water, ethanol, methanol, plant oil and biodiesel.

本技术利用自然界大量存在的多糖、葡萄糖和蔗糖等经过简单的灼烧磺化制备出性能突出的固体酸催化剂，该催化剂不溶于水、乙醇、甲醇、植物油脂和生物柴油。

New production technology of a solid acid catalyst for biodiesel production A solid acid catalyst of outstanding performances has been produced with this technology utilizing amylose , glucose and saccharose abounding in the nature through simple burning and sulfonation processes .

新型生物柴油生产用固体酸催化剂生产技术本技术利用自然界大量存在的多糖，葡萄糖和蔗糖等经过简单的灼烧磺化制备出性能突出的固体酸催化剂，该催化剂不溶于水，乙醇，甲醇，植物油脂和生物柴油。

Hydrofining- hydrovisbreaking combined process has been adopted in the 5 000 b/d oil refining unit of Hangzhou Refinery and the hydrofining catalyst and hydrovisbreaking catalyst have been sectionally loaded in a single reactor to process inferior coker gasoline and gas oil.

杭州炼油厂 2 5 0kt/a油品精制装置采用加氢精制/临氢降凝组合工艺，在同一台反应器中分段装填精制和降凝催化剂，加工劣质汽油、柴油，操作弹性大，拓宽了柴油加氢精制的原料来源，大大提高了低凝柴油收率，且产品颜色浅、硫含量低、氧化安定性好。

Because〓 supported on silica is soluble inmethanol, active center of supported 〓 catalyst is able to elapse. The saltsin which ion semidiameter are larger, are ideal solid acidic catalyst, because of theirhigher activities, insolublilities in methanol.

离子半径较大的负载型磷钨酸盐除具有较高活性外，由于不易溶于极性溶剂，因而催化剂活性稳定性强，是一种理想的固体酸醚化催化剂。

"Its compounds, in which it has valence 2, 3, or 4, include titanium trichloride (used as a catalyst in polypropylene production), titanium dioxide (extensively used as a pigment -with the greatest hiding power of all white pigment s-in paints, enamels, and lacquers), and titanium tetrachloride (used in skywriting, smoke screens, and as a catalyst)."

钛的化合物(其中钛的原子价为2、3或4)包括三氯化钛(在聚丙烯生产中作催化剂)、二氧化钛(在油漆、釉药和漆器中广泛用作颜料，在所有白色颜料中掩盖能力最强)以及四氯化钛(用于空中显示图形文字、烟幕以及催化剂)。

"Its compounds, in which it has valence 2, 3, or 4, include titanium trichloride (used as a catalyst in polypropylene production), titanium dioxide (extensively used as a pigment-with the greatest hiding power of all white pigments-in paints, enamel s, and lacquers), and titanium tetrachloride (used in skywriting, smoke screens, and as a catalyst)."

钛的化合物(其中钛的原子价为2、3或4)包括三氯化钛(在聚丙烯生产中作催化剂)、二氧化钛(在油漆、釉药和漆器中广泛用作颜料，在所有白色颜料中掩盖能力最强)以及四氯化钛(用于空中显示图形文字、烟幕以及催化剂)。

"Its compounds, in which it has valence 2, 3, or 4, include titanium trichloride (used as a catalyst in polypropylene production), titanium dioxide (extensively used as a pigment-with the greatest hiding power of all white pigments-in paints, enamels, and lacquers), and titanium tetrachloride (used in skywriting, smoke screens, and as a catalyst )."

钛的化合物(其中钛的原子价为2、3或4)包括三氯化钛(在聚丙烯生产中作催化剂)、二氧化钛(在油漆、釉药和漆器中广泛用作颜料，在所有白色颜料中掩盖能力最强)以及四氯化钛(用于空中显示图形文字、烟幕以及催化剂)。

Mordenite has a significant effect on the activity of catalyst, results of test showed: with soluble glass as main feedstock and addition of crystal precursor, thecrystalization time can be reduced, and the synthesized mordenite has higher surface area and structure of small crystal particulate and big pore diameter. Through ion exchange with ammonium and acid, the synthesized mordenite is suitable to prepare isomerization catalyst.

丝光沸石对催化剂活性有较大影响，试验结果表明：以水玻璃为主要原料，加入晶种可缩短晶化时间，合成的丝光沸石具有较高的比表面积及小晶粒大孔径结构，经铵交换及酸交换后适于制备异构化催化剂。

The sulfuration of catalyst for hydro-refining is the key technology to increase activity of catalyst, extend the running time of the system and enhance economic benefit.

加氢催化剂硫化是提高催化剂活性，延长装置运转周期，提高经济效益的关键技术。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。