以前它是由碳水化合物发酵得到，现在由乙醛醛醇缩合或石油气体氧化的合成方法制得。
It was formerly derived by fermentation of carbohydrates but is now made synthetically by aldol condensation of acetaldehyde or by oxidation of petroleum gases.
试验表明，本文合成共聚物具有良好的降滤失、防塌、保护油气层性能，抗温、抗业污染能力强。
The experiment showed that the copolymer filtrate reducer is pretty good in depressing the filtration rate, collapse prevention, reservoir protection, thermal stability and resistance salt.
液化石油气可用作于供暖和运输的燃料，也可用来制造塑料和合成橡胶。
LPG is used as a fuel for heating and transportation, and to manufacture plastics and synthetic rubber.
油气再混合成样比较复杂。
本发明催化剂用于由合成气制备液化石油气用的催化剂。
The catalyst is the catalyst used for preparing the liquefied petroleum gas by synthetic gas.
本发明催化剂用于由合成气制备液化石油气用的催化剂。
The catalyst is the catalyst used for preparing the liquefied petroleum gas by synthetic gas.
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