甲醇

Supported solid bases and metal oxide catalysts were prepared successfully by isochoric impregnation and the co-precipitation method, and were used for synthesis of biodiesel from transesterification of rapeseed oil and methanol. The high active solid base catalysts: KF/Al2O3, ZnO/La2O3 and La2O3 were found in this paper.

本文用等体积浸渍法和共沉淀法制备了负载型和金属氧化物型固体碱催化剂，并应用于催化菜籽油与甲醇酯交换合成生物柴油的反应，筛选出了高活性的KF/Al2O3，ZnO/La2O3和La2O3三种固体碱催化剂。

Synthesis of biodiesel by transesterification of rapeseed oil and methanol catalyzed by KOH/Al2O3 solid base was studied. The catalyst was prepared by isochoric impregnation. Effects of some factors on the transesterification were investigated systematically and reaction conditions were optimized. The optimum reaction conditions on KOH/Al2O3 catalyst were: mass ratio of KOH to Al2O3 20%; calcination temperature 400℃ for 5h; molar ratio of methanol to oil 12:1, the amount of catalyst 5wt%; reaction temperature 60℃ and reaction time 2h.

采用等体积浸渍法制备了KOH/Al2O3负载型固体碱催化剂，并将其用于菜籽油与甲醇酯交换法合成生物柴油的研究；分别考察了催化剂附载量、锻烧温度、醇油摩尔比、反应温度、反应时间等条件对生物柴油产率的影响；结果表明：用等体积浸渍法，在400℃煅烧5h，制得负载量为20%的KOH/Al2O3催化剂。

Company is a new comprehensive private chemical enterprise, covers an area of 560,000 square meters, with assets of 230 million yuan, mainly the production of urea, ammonium bicarbonate, melamine, compound fertilizer, methanol, Isocyanuric acid, liquid carbon dioxide, cyclohexylamine, cycloheximide, oxygen, bio-ching aldehyde chemical products, etc., business cover chemical production, warehousing logistics, agricultural operations, container manufacturing industry, the adoption and implementation of ISO9001 Quality System Certification, ISO14000 Environment System Certification and OHSAS18000 Occupational Health System Certification .

公司属新型综合性民营化工企业，占地面积56万平方米，拥有资产2.3亿元，主要生产尿素、碳酸氢铵、三聚氰胺、复合肥、甲醇、异氰脲酸、液体二氧化碳、环己胺、环己亚胺、氧气、生物清醛剂等化工产品，业务涵盖化工生产、仓储物流、农资经营、容器制造等行业，通过并实施ISO9001质量体系认证、ISO14000环境体系认证与OHSAS18000职业健康体系认证。

When the number of the methanol molecules in the clusters reaches five and six,the two forms tend to be isoenergetic.

当团簇中的甲醇数量达到5和6时，两种最稳定构型的能量趋向等同。

Methyl isonicotinate was synthesized using isonicotinic acid and anhydrous methanol as raw materials in presence of solid super acid as catalyst.

以异烟酸、无水甲醇为原料，固体超强酸做催化剂，合成了异烟酸甲酯。

Results There were about 15 kinds of chemical poisons including vinyl chloride,polyvinyl alcohol,isoparaffin,polyvinylacetate,sodium hydrate,ammonia,acid hydroc,methanol,diesel oil,carbon monoxide,carbon dioxide,sulfur dioxide,nitrogen oxides,ozo...

结果在聚氯乙烯的生产过程中，作业场所存在化学毒物较多，主要包括氯乙烯、聚氯乙烯、聚乙烯醇、过氧化物、异链烷烃类、聚乙烯乙酸酯、氢氧化钠、氨、盐酸、甲醇、柴油、一氧化碳、二氧化碳、二氧化硫、氮氧化物、臭氧、二氧化锰等。

A HPLC method has been developed for the simultaneous determination of 4-methylbenzy- lalcohol,p-tolualdehyde,4-caboxybenzaldehyde,benzoic acid,p-toluie acid,terephthalic acid,o- phthalic acid and isophthalic acid in the residue from purification of terephthalic acid.

其残渣中含有再利用价值很高的中间产物：4一甲基苯甲醇(4一MBA)，对甲基苯甲醛(P一tolual-dehyde)，4一竣基苯甲醛(4一CBA)，苯甲酸，对甲基苯甲酸，对苯二甲酸，邻苯二甲酸，间苯二甲酸等。

Leading products are urea, ammonium bicarbonate, methanol, hydrogen peroxide, melamine, isopropylamine, formaldehyde, urotropine, and so on. 2005 sales revenue will reach 1 billion yuan, and profits and taxes will reach 82 million yuan.

主导产品有尿素、碳酸氢铵、甲醇、双氧水、三聚氰胺、异丙胺、甲醛、乌洛托品等。2005年销售收入将达到10亿元，实现利税将达到8200万元。

Jinzhou Chemical landing six branches now have the world's larger 5,000 tons / year, Central Sulfolane a plant to produce 1,500 tons mainly isopropylamine / devices in a production, domestic production of methyl iso unique ---A, two isobutyl ketone and methyl isobutyl ketone methanol mainly 1,500 tons / year of a production plant.

锦州六陆化工分公司目前拥有世界上较大的5000吨/年环丁砜生产装置一套、以生产异丙胺为主1500吨/年生产装置一套、国内独有以生产甲基异丁基酮甲酮、二异丁基酮和甲基异丁基酮甲醇为主1500吨/年生产装置一套。

Methods: Co1umn: Berger PYR(Ethyl pyridine, 250mm×4.6mm, 6μm); Mobile phase: CO2-methanol with 0.2% isopropylamine (77:23), Pressure: 100bar, Temperature: 35℃, Flow: 2.0mL/min, Detection wavelength: 225nm.

色谱柱：Berger PYR（乙基吡啶柱，250mm×4.6mm，6μm），流动相：超临界CO2-0.2%异丙胺甲醇(77：23)，压力：100bar，温度：35℃，流速：2.0mL/min，检测波长：225nm。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。