In order to reduce raw material costs, this topic then studied at the condition of atmospheric pressure taking hydrosulfide sodium as materials to synthesis sodium thioglycolate kettle-style process.
为了进一步降低生产成本，本课题继而研究了常压条件下硫氢化钠法合成巯基乙酸钠的工艺过程。
2
The property characteristics of new generation of ester-hardened sodium silicate sand was introduced, and the factors influencing the atmospheric temperature strength and collapsibility of.