低成本萘系高效减水剂合成工艺研究

发布时间：2018-01-01 08:22

本文关键词：低成本萘系高效减水剂合成工艺研究　出处：《郑州大学》2017年硕士论文　论文类型：学位论文

【摘要】：萘系高效减水剂,因其性能优越、生产工艺成熟及生产成本较低,是我国目前用的最多的高效减水剂。近几年来因为主材料工业萘的价格不断攀升而导致萘系减水剂价格大幅增加。2,6-萘二磺酸,G盐(2-萘酚-6,8-二磺酸盐)废水都是工业废弃物,其直接排放会对环境造成严重地破坏,而两种物质中都含有合成减水剂的成分,因此本文分别以工业萘、2,6-萘二磺酸、G盐废水为原料,通过单因素法和正交法对合成工艺参数进行改进,合成出了两种萘系高效减水剂,并通过水泥净浆和混凝土试验测试了萘系高效减水剂的各项性能,结果表明:通过工艺调整,在萘系减水剂合成中可掺入G盐废水的最大量为30%,2,6-萘二磺酸的最大量为20%,合成的两种减水剂与纯工业萘减水剂性能相当,而成本降低。此外,本文还研究探讨了以1,2-二氯乙烷作为共沸剂,采用共沸法生产高浓萘系减水剂的生产工艺及其与传统工艺的比较。结果表明:相较于以石灰法生产高浓萘系减水剂的传统工艺,共沸法生产时,磺化温度需适当降低,磺化时间不变,硫酸用量可减少25%。同时生产出来的产品在同掺量下水泥净浆流动度有所增加,减水率及混凝土强度等性能指标也有改善。综上所述,通过低成本萘系高效减水剂合成工艺优化与性能研究,实现了资源的综合利用,减少了环境污染,降低了生产成本。
[Abstract]:Naphthalene superplasticizer has the advantages of superior performance, mature production process and low production cost. Naphthalene superplasticizer is the most widely used water reducer in China. In recent years, the price of naphthalene series superplasticizer has increased significantly because of the rising price of naphthalene in the main material industry. 8-disulfonate) wastewater is industrial waste, its direct discharge will cause serious damage to the environment, and both substances contain the composition of synthetic water reducer, so this paper uses industrial naphthalene 2. Two kinds of naphthalene series superplasticizer were synthesized by improving the synthesis process parameters by single factor method and orthogonal method in the waste water of 6-naphthalene disulfonic acid (6-naphthalene disulfonate G salt) as raw material. The properties of naphthalene superplasticizer were tested by cement paste and concrete test. The results showed that the maximum amount of G salt waste water can be added into the synthesis of naphthalene superplasticizer by adjusting the process. The maximum amount of 6-naphthalene disulfonic acid was 20. The properties of the two water reducers were similar to those of pure industrial naphthalene superplasticizers, but the cost was reduced. In addition, the azeotropic agent of 1 ~ (2) -dichloroethane was studied. The production process of high concentrated naphthalene series water reducer by azeotropic method and its comparison with the traditional technology are compared. The results show that compared with the traditional process of producing high concentrated naphthalene series water reducer by lime method, the azeotropic method is used in the production of high concentration naphthalene series water reducer. The sulphonation temperature should be reduced properly, and the sulphonation time should be kept constant, the amount of sulfuric acid could be reduced by 25%. At the same time, the fluidity of cement paste was increased under the same content of the product. Water reducing rate and concrete strength are also improved. In conclusion, through the low cost naphthalene superplasticizer synthesis process optimization and performance research, the comprehensive utilization of resources and reduce environmental pollution. The cost of production has been reduced.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU528.042.2;X703

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