延迟焦化低硅消泡剂的研制

研制了一种用于延迟焦化过程的低硅消泡剂，该消泡剂是以聚醚改性聚硅氧烷为主体复配而成。以含氢硅油与聚醚为原料，催化合成了聚醚改性聚硅氧烷；考察了反应时间、反应温度、物料配比、催化剂用量对反应的影响，确定了最佳合成条件，即含氢硅油中的Si-H与聚醚中的-OH的摩尔比为1:(1.4~1.6)、催化剂FA-2的质量分数为0.4 %、反应温度为110 ℃、反应时间为8 h。评价结果表明，所制备的聚醚改性聚硅氧烷及其复配物的消泡及抑泡性能良好。

PREPARATION OF LOW-SILICON DEFOAMING AGENT FOR DELAYED COKING

A low-silicon defoaming agent for delayed coking was developed, which is a complex additive package containing polyether modified polysiloxane mainly. The polyether modified polysiloxane was prepared from hydrogenous silicone oil and polyether, with FA-2 as catalyst. The influences of reaction conditions, such as reaction time, reaction temperature, the ratio of reagents and catalyst dosage were studied, and the optimum conditions were obtained as follows: the mole ratio of Si-H in hydrogenous silicone oil and –OH in polyether was in the range of (1:1.4)—(1:1.6), the mass fraction of catalyst was 0.4 %, reaction was proceeded at 110 ℃ for 8 h. Performance evaluation results showed that the prepared polyether modified polysiloxane and its complex exhibited good antifoaming and suppressing foam performance.