Using 1,4-butanediol(BDO) and dimethyl succinate(DMS) from coal as raw materials,titanium iso-propoxide as catalyst,high molecular weight poly(butylenes succinate)(PBS) was synthesized by ester exchanging polycondensation under the conditions of the molar ratio of catalyst to BDO was 0.4% ～0.6%,the molar ratio of BDO with DMS between 1.4 and 1.6,the transesterification temperature was 140 ℃,and the polycondensation tem-perature was 230 ℃.The structure of PBS was characterized by FTIR and 1 HNMR.DSC and TG analysis showed that the melting temperature of PBS was 115 ℃,and its 1% weight loss temperature(T1%) was 250 ℃,which indi-cated that the PBS had good thermal stability.

The preparing process of precipitation precursors was studied for the methanol synthesis catalyst.The precursors are mainly Cu-Zn-Al hydroxycarbonates as revealed by the XRD pattern.The decomposition process was investigated with the TG/MS technique,which showed that the loss of weight happened at around 250 ℃.Increasing the calcination temperature could promote the decomposition of the precursors,which resulted in the great change of surface area and growing up of Cu crystals.

The invention provides a method for preparing aliphatic polydiacid diol ester based on aliphatic diacid ester and diol as monomers. The method comprises the following steps: carrying out ordinary-pressure ester exchange reaction on aliphatic diol and aliphatic diacid ester in a molar ratio of (1.05-5): 1 at the temperature of 140-200 DEG C in the presence of a catalyst and an auxiliary agent, wherein the amount of the catalyst is 0.01-5% mole of diol, and the amount of the auxiliary agent is 0.001-100wt% that of the catalyst; and raising the temperature to 200-300 DEG C, reducing the pressure to below 100-1000 Pa, and then carrying out polycondensation so as to obtain the aliphatic polydiacid diol ester. The aliphatic polydiacid diol ester prepared according to the method has a molecular weight of above 120000, and has good heat resistance and mechanical property; and by using the method, the amount of a micromolecular byproduct especially tetrahydrofuran can be reduced, and the method has the advantages of mild process condition and high technical economy, and is simple and easy to operate.

As environmentally friendly solvents,ionic liquids compared with molecular solvents possess many particular properties,such as colorless,odorless,non-volatile,non-flammable,thermal stable,and chemical stable.The functional ionic liquids may be obtained by substituting anions and cations and are considered as the most ideal green high-performance solvents.The types,characteristics,key properties and preparation of ionic liquids and their applications are reviewed.

Preparation of methyl 3-hydroxpropanate from ethylene oxide, methanol and CO using Co2(CO)8 as catalyst and 3-hydroxylpyridin as ligand was studied. The influences of temperature, pressure, concentration of ethylene oxide, cata-lyst and ligand dosages on the conversion of ethylene oxide and the selectivity to target product were investigated. Optimal conditions were determined to be as follows: temperature 70℃, pressure 7.0MPa, ethylene oxide/catalyst molar ratio 100:1, ligand/catalyst molar ratio 6:1, and methanol/ethylene oxide molar ratio 6:1. Under above conditions, the conversion of ethylene oxide and the selectivity to 3-hydroxpropanate were 100% and 93%, respectively. Kinetics study showed that the differential of ethylene oxide concerntration to reaction time was proportional to ethylene oxide concerntration, thus this is a first order reaction with respect to ethylene oxide. The re-action rate constant, apparent activated energy and pre-exponential factor were calculated by Arrhenius equation to be (0.2～0.61)×10- 3min-1, 72.75kJ.mol-1, and 4.97×107 min-1, respectively.

The heat capacity,enthalpy and entropy of dimethyl maleate,dimethyl fumarate and 1,4-butanediol under the standard state were estimated by the method of group contributions in this paper. The functional correlations between the heat capacity, enthalpy of these compounds and temperature were established. In addition, the Gibbs free energy and standard equilibrium constants of the reactions were calculated under different temperature. Based on the thermodynamics analysis it can be found that the selectivity of 1,4-Butanediol decreases with the increasing of temperature, although the reaction rate will increase.