随着近几年CO2排放量的增加,温室效应已引起国内外的广泛关注.本文详细介绍了液体CO2的生产工艺、主要用途及应用开发情况,对企业的产品开发和废气的综合利用具有一定的指导作用.

Pyrrolidione and its derivatives is a kind of very important of five element nitrogen heterocyclic moleaular,these compounds have a broad application in industrial production and medicine preparation.The synthesis method of pyrrolidione and its derivatives is systematically summarized in this paper,and the prospect is also forecasted.

简述了国内氯化石蜡生产企业和商品检验单位经常采用的几种测定氯含量的方法,提出了选用哪一种分析检测方法的参考意见,为企业和单位使用氯含量测定方法对比提供了便利。

根据工作经验,较为详细的论述了应用PLC时保证正常运行所必须注意的一系列问题,并给出了合理的建议。

CuO/ZnO/Al_2O_3 catalyst is prepared by co-precipitation method,with Cu,Zn,Al nitrates as raw materials.The activity of the catalyst on the preparation of γ-butyrolactone by dehydrogenation of 1,4-butanediol in the atmosphere is reviewed.With reaction temperature 250~260 ℃,liquid hourly space velocity 2.0 h~(-1),the mole ratio of hydrogen and alcohol 4.5~5.5,the yield of γ-butyrolactone can be up to 92%.In appropriate circumstances,catalyst has good activity and an operating flexibility.

Recovery technology of maleic anhydride such as water recovery method,non-water solvent recovery method and chemical recovery technology are reviewed,and the development direction of maleic anhydride recovery technology is also pointed out.