Study on O-hydroxy by ethylation of diethyl carbonate and catechol CATALYTIC SYNTHESIS OF PHENETOLE BY ETHYLATION OF PHENOL WITH DIETHYL CARBONATE

A Fast and Simultaneous Determination of o-Dihydroxybenzene and p-Dihydroxybenzene; Study on O-hydroxy by ethylation of diethyl carbonate and catechol

对苯二酚、邻苯二酚的快速同时测定碳酸二乙酯乙基化邻苯二酚合成邻羟基苯乙醚

The catalysts of Al P Ti Si O were prepared by common precipitation method. Vapor phase O ethylation of catechol with ethanol over the synthesized samples was studied.

采用常规沉淀法制备了Al-P-Ti-Si-O体系催化剂，并研究了邻苯二酚与乙醇在该催化剂上的气相O-乙基化反应，考察了催化剂组成对催化剂结构、酸性和反应性能的影响。

Thermodynamic Analysis for Synthesis of Ethyl Methyl Carbonate from Dimethyl Carbonate and Diethyl Carbonate Study on O-hydroxy by ethylation of diethyl carbonate and catechol

碳酸二甲酯和碳酸二乙酯合成碳酸甲乙酯的热力学分析碳酸二乙酯乙基化邻苯二酚合成邻羟基苯乙醚

Catalytic synthesis of phenetole by ethylation of phenol with diethyl carbonate ( DEC) in fixed bed reactor was investigated.

以碳酸二乙酯（DEC）为乙基化试剂，与苯酚在气固相条件下催化合成苯乙醚。

To introduce the ethyl group into ( a compound). Study on O-hydroxy by ethylation of diethyl carbonate and catechol

使乙基化把乙基引入（一化合物）碳酸二乙酯乙基化邻苯二酚合成邻羟基苯乙醚

Synthesis of p-nitroanisole with diethyl carbonate as ethylation reagent

碳酸二乙酯作为乙基化试剂合成对硝基苯乙醚

Catalytic synthesis of phenetole by ethylation of phenol with diethyl carbonate

碳酸二乙酯与苯酚催化合成苯乙醚的研究

Determination of methyl mercury in sediments and soils by gc-cvafs after aqueous phase ethylation

萃取-乙基化结合GC-CVAFS法测定沉积物及土壤中的甲基汞

Kinetics of N-Ethylation of Aniline by Diethyl Ether

苯胺与乙醚N-乙基化反应动力学

An ethylation catalyst Z 937 with suitable stability were prepared on thd basis of NL.

在NL原粉基础上，制备了具有一定稳定性的乙基化催化剂Z937。

Study on catalyst properties for toluene ethylation

甲苯乙基化催化剂性能探讨

Influence of some parameters on the ethylation of toluene over modified zeolites

改质沸石上甲苯乙基化过程中若干影响因素的考察

Ethylation selectivity, was affected by strength of surface acid sites, location of acid sites and pore structure.

乙基化的选择性则与催化剂的表面酸强度、酸性中心位置和孔道结构等因素有关。

The effect of toluene on ethylation of cellulose was investigated.

本文研究了甲苯在纤维素乙基化过程中的影响。

Results showed it was possible to recovery scheelite from tailings of molybdenum flotation in Luanchuan.

研究表明,采用常温浮选、精选加温的工艺流程从栾川浮钼尾矿中回收白钨已成为可能.

Variation rule of Slag amount during scheelite direct alloying is worked out by theoretical calculation.

通过理论计算分析了白钨矿直接合金化过程中的渣量变化规律.

Ultravioletspectrumspectrum and flotation solution chemistry were studied of scheelite and benzoylhydroxamic acid.

研究了天青石精矿复分解法制备碳酸锶的工艺及溶液化学作用机理.

The cost is about sixteen thousand dollars for the one hundred days semester.

百日学期的费用大概为一万六千美元.

A fur cap with earflaps is available for cold weather.

带护耳的棉帽可在冬季使用.

Objective : To observe the efficacy of MEBO in treating residual wounds after skin grafting.

目的: 观察MEBO治疗烧伤植皮术后残余创面疗效.