FUEL
·
2020
·
IF 5.578
Gang Chen,Zhichao Zhou,Xiaodan Shi,Xiaolong Zhang,Sanbao Dong,Jie Zhang
Small molecule flow improver for heavy oil recovery has attracted great attention in oilfield chemistry . In this study, 24 alkylbenzenesulfonates were synthesized and evaluated as crude oil flow improvers. The results show that all of the alkylbenzenesulfonates were effective, the chromium alkylbenzenesulfonate (CrDBS) and zinc alkylbenzenesulfonate (ZnDBS) were found to have the best performance with the viscosity reduction rate of higher than 90%. Besides, the CrDBS and ZnDBS can depress the pour point of the crude oil sample by 21.0 °C and 16.0 °C, respectively. The co-crystallization of alkylbenzenesulfonate with the saturated hydrocarbons in the crude oil could disorder the wax crystals and depress the pour point. In addition, DSC was used to reveal the mechanism of viscosity reduction and pour point depressing by alkylbenzenesulfonates. The flow improver can disturb the formation of hydrogen bonds and the π-π interaction bonds among the polycyclic aromatic hydrocarbons and the resin macromolecules . Besides, the field test using ZnDBS confirmed its good performance and promising application potential in enhancing the heavy oil recovery.
研究领域:
石油化学
·
油田开发
✓ 已验证
DOI
高影响因子
JOURNAL OF SURFACTANTS AND DETERGENTS
·
2016
·Vol. 20
·期 1
·183-191
·
IF 1.853
Wang Yong,Liu Xiaochen,Jiao Tiliu,Niu Jinping
Comparison of surface and interfacial properties of internal olefin sulfonates (IOS) and alpha olefin sulfonates (AOS) shows that hydrocarbon chain branching has a significant influence on interfacial properties at the air–water, pentadecane–water and parafilm–water interfaces. The isomeric branched IOS shows a higher critical micelle concentration and are more effective in reducing the surface tension at the air–water interface by occupying a larger area per molecule. IOS exhibits better dynamic air–water interfacial properties due to a lower meso-equilibrium surface tension. The equilibrium interfacial tensions for AOS and IOS have no remarkable difference at the pentadecane–water interface. The water wettability and electrolyte tolerance are enhanced with branched hydrocarbon chain olefin sulfonates.
研究领域:
化学工程
·
表面化学
✓ 已验证
DOI
高影响因子
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
·
2018
·
IF 1.454
R. X. Niu,J. Y. He,B. Long,D. Q. Wang,H. Song,C. Wang,G. M. Qu
Nonylphenol dodecyl sulfonate (C12NPAS) has been synthesized, and mixed with heavy alkyl benzene sulfonates (HABS) in different proportions. The effects of different mixing ratios on properties such as adsorption, wetting, foaming, and emulsification, of the C12NPAS/HABS surfactant mixtures have been systematically investigated. Experimental results have shown that, after mixing, the wetting and foaming properties of C12NPAS/HABS are improved remarkably. Compared with C12NPAS and HABS alone, the adsorption and emulsifying properties of C12NPAS/HABS are far superior, which we attribute to a synergistic effect between these surfactants.
研究领域:
化学
·
表面科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Xiaohong Wang,Jialian Li,Chen Chen,Xu Li,Lei Liu,Jinxiang Dong
Benzene sulfonate surfactants are crucial anionic surfactants, commonly derived from petrochemical sources. Herein, we present a new method for synthesizing alkyl-tetralin sulfonate anionic surfactants using α-olefins (n-hexene, n-octene, n-decene) and tetralin sourced from the coal chemical industry as raw materials. The three-resulting alkyl-tetralin sulfonates (C6-THNS, C8-THNS and C10-THNS), obtained by alkylation and sulfonation of tetralin were characterized through HPLC, FTIR, LCMS and 1 H NMR techniques. Their surfactant properties were also investigated and compared with commercially applied linear alkylbenzene sulfonate (LAS). We observed that C6 alkyl-tetralin sulfonate (C6-THNS) exhibited smaller critical micelle concentration ( CMC =0.60 mM) and lower equilibrium surface tension ( γ CMC =33.43 mN/m). Similarly, C6-THNS also showed comparable foaming, wetting and emulsifying properties with LAS, which can be used as a substitute for LAS surfactants. This study shows that the synthesized alkyl-tetralin sulfonates is a potential surfactant, providing a route for efficiently using coal-based chemicals to synthesize surfactants.
研究领域:
化学工程
·
表面活性剂合成
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2020
·Vol. 13
·期 16
·3550
·
IF 3.057
Xiaodong Lu,Qiang Yao,Weihong Cao,Tianbo Tang
An extremely efficient flame retardant with low water solubility has been developed for bisphenol-A based polycarbonate. Potassium trimethylsilylbenzenesulfonate (KTSS) combining trimethylsilyl and sulfonate groups in its molecule is 7 times less water soluble and 5 times more effective in flame retardancy than potassium benzenesulfonylbenzenesulfonate (KSS), the commercial workhorse for polycarbonate (PC). At a loading of 0.02%, KTSS enables PC to achieve a solid UL-94 V0 rating and a limiting oxygen index (LOI) value of 34.4%, representing an increase of 8.5 units. The extremely high efficiency of KTSS stems from its great migration ability to the burning polymer surface facilitated by trimethylsilyl group, its timely release of active alkaline species that promote the charring process of PC, and the stabilization of char by silicon. In addition to the exceptional flame retardancy, PC/KTSS retains excellent physical properties of PC.Keywords:polycarbonate;flame retardant;sulfonate salts;silicon
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2020
·
IF 5.162
Zhengyi Zhang,Jiaoman Li,Yan Zhang,Zhenfu Jin
Lignin, which is crosslinked by ether and carbon‑carbon linkages, is a highly branched polymer consisting of phenyl propane units. And owing to the abundant phenolic hydroxyl groups and its structural heterogeneous characteristics, lignosulfonate, considered as a renewable aromatic macropolymer, can be used as co-curing agent in EP thermoset systems. In this study, kinetics of lignosulfonate (LS) and partially depolymerized lignosulfonate (DLS) as co-curing agents for applications to EP thermoset were discussed with the differential scanning calorimetry (DSC) measurement. The activation energy ( E a ) and dynamic modeling of curing reaction were obtained by the methods of non-isothermal kinetic analysis reported by Kissinger and Ozawa. The glass transition temperature ( T g ) was determined by DSC and mechanical properties of epoxy resins were carried out using the Universal Testing Machine. The LS dropped the exothermic peak temperature and E a of curing reaction of EP thermoset. Those of DLS were more active than the higher molecular weight lignosulfonate. The EP thermoset cured with DLS (EP-DLS) exhibited much higher reactivity, and the curing reaction could be occurred at lower temperature. The T g of EP-DLS has risen by 10 °C compared with the case without lignosulfonate. The tensile strength , elongation at break and impact strength of EP-DLS rose by 28.7%, 52.5% and 53.5%, respectively, than those of the epoxy resin cured with LS (EP-LS).Molecular weight of lignosulfonate could be an important factor of the curing reaction of EP thermoset. The high performance EP thermoset could be obtained by partially depolymerized lignin as co-curing agents.
研究领域:
材料科学
·
化学工程
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Jingjing Shi,Yanju Lu,Jianchun Jiang,Junming Xu
Lignin-based dye dispersants (LDD), as one of the most common lignin resource end-application product, is difficult to meet the rapidly developing needs of modern fiber dyeing due to their inherent structural defects. The efficient upgrading and modification of LDD is of great significance to the value-added application of lignin resources and the expansion of LDD sinking market. In this study, using industrial kraft lignin as raw material, cashew phenol was introduced into lignosulfonate in the form of C C bonds by ingenious utilizing the structural characteristics of lignin disordered condensation. Aromatic ring in cashew phenol could provide sufficient sulfonic acid group grafting sites, while C 15 fatty chain could enhance steric hindrance effect. In the dispersibility test, the dispersing power showed 99.09 %, and the low/high temperature dispersion (LTD/HTD) were 5 s/4 and 6 s/4, respectively, higher than the dispersibility level of LDD in the market, has great commercial value and industrial potential. Combined with FTIR, 1 H NMR, GPC and ICP, the structural properties of lignin were analyzed in detail, and the degree of sulfonation-condensation was balanced-optimized. The C C bond condensation process between cashew phenol and lignin was revealed, and the mechanism of action on dye particles was elucidated.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2023
·
IF 3.8
Zheng Shen,Jian Chen,Jilong Ge,Zhuoer Cai,Xiu-Ni Hua,Baiwang Sun
Three novel paliperidone sulfonate salts, including salt 1 (paliperidone methanesulfate), salt 2 (paliperidone benzenesulfate), and salt 3 (paliperidone p -toluenesulfate), were successfully designed and synthesized using a slow solvent evaporation method. Through TGA-DSC (thermogravimetric analysis-differential scanning calorimetry) testing, it was observed that the decomposition temperatures of these newly developed pharmaceutical salts were increased by 90 K, highlighting their enhanced thermal stability compared with paliperidone. The formation of these salts was primarily attributed to intermolecular hydrogen bonding interactions, as revealed by single-crystal structure analyses. Furthermore, the analyses of 3D d norm Hirshfeld surface and 2D fingerprint plots demonstrated that the molecular stability was further enhanced by the interactions of H···H and H···O. Salt 1 showed a 10-fold increase in solubility and an approximately 200-fold increase in dissolution rate in a variety of simulated human body fluid environments. The confirmation of the formation of paliperidone drug salts and the high purity of the synthesized salts were further supported by PXRD (powder X-ray diffraction) and IR (infrared spectroscopy) analysis. Notably, this study represents the first reported investigation of paliperidone sulfonate salts, potentially providing valuable insights for the improvement of paliperidone pharmaceutical formulations.
研究领域:
药物化学
·
材料科学
·
制药工程
✓ 已验证
产品关联
DOI
高影响因子
FUEL PROCESSING TECHNOLOGY
·
2018
·
IF 3.956
Congfei Yao,Yucui Hou,Shuhang Ren,Weize Wu,Youan Ji,Hui Liu
To develop a greener method to separate phenols from oils, four kinds of halogen-free zwitterions , including 1-(propyl-3-sulfonate)-triethylaminium (TEA-PS), 1-(propyl-3-sulfonate)-tripropylaminium (TPA-PS), 1-(butyl-4-sulfonate)-triethylaminium (TEA-BS) and 1-(butyl-4-sulfonate)-tripropylaminium (TPA-BS), were designed and synthesized to separate phenols from model oils via forming deep eutectic solvents (DESs) based on the formation of hydrogen bonding between OH group on phenol and the oxygen atom on SO 3 − group of the zwitterions. The effects of time, temperature, dosage of zwitterions, initial phenol content, and structure of zwitterions were investigated. The results show that the extraction process can reach equilibrium within 2 min and the extraction efficiency is not sensitive to temperature. The zwitterions separate well phenol from model oils at room temperature , and the minimum phenol contents follow the order: TEA-PS > TPA-PS > TEA-BS > TPA-BS. The minimum phenol content and the maximum extraction efficiency at 25 °C can reach 4.8 g dm −3 and 98.6%, respectively, by using TPA-BS. All the maximum extraction efficiency can be obtained with n zwitterions : n phenol of less than 0.4, which greatly reduces the dosages of extractants. Importantly, these zwitterions can avoid the introduction of halide ion, which can seriously corrode the process equipment. All these zwitterions can be easily regenerated by an anti-solvent method without an obvious mass loss and a decrease in phenol extraction efficiency. Lastly, the extraction mechanism was studied with FT-IR and the freezing points of DESs indicate that the DESs are formed through hydrogen bonding.
研究领域:
化学工程
·
环境科学
·
绿色化学
✓ 已验证
产品关联
DOI
高影响因子
FlatChem
·
2022
·
IF 5.829
Zezhong Zhang,Dong Sun,Rumeng Feng,Shengkai Yang,Kelei Zhuo
Aqueous phase exfoliation (APE) has become a promising method of the graphene preparation. However, it still has some disadvantages, such as low yield and the influence of residual stabilizer on its application. Herein we report a method of the graphene preparation via APE of graphite assisted by sulfonated cobalt phthalocyanine (CoPcS) as the stabilizer. A high yield of graphene can be obtained at low concentration of CoPcS. The yield was 3.2 % in single exploitation, and the total yield reached to 7.3 % after three cycles of exfoliation. The sizes of the prepared graphene sheets were in micron level, and the percentage of few-layer graphene (<5) reached 93 %. The π-π interaction of graphene with CoPcS, as well as the repulsive interaction between negatively charged CoPcS ions, played a crucial role in stabilizing the graphene dispersion. The as-exfoliated graphene powder served directly as a filler in the epoxy coating on the surface of aluminum to improve the protection performance of the coating. A simple, cost-effective, and potential avenue has been provided to product and utilize high-quality graphene materials.
研究领域:
材料科学
·
化学工程
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION SCIENCE AND TECHNOLOGY
·
2021
·
IF 2.475
Mei Wang,Jing Huang,Dailian Zhu,Deyou Yu,Peng Ye,Minghua Wu,Kemei Pei,Yanrong Jia,Huagang Ni
The nitrogen-doped porous carbon was prepared by direct carbonization of pyrrole functional crosslinked lignosulfonates precursors via Friedel-Crafts alkylation reaction, and studied for the removal of Pb(II) from water. The absorbent showed higher adsorption capacity which reached 102.77 mg/g when the initial Pb(II) concentration was 200 mg/L and the dosage was 1 mg/mL. Chemical interactions drive the adsorption and the calculated Qmax was 157.9 mg/g according to the Langmuir isotherm model. Such easily separated porous carbon with higher uptake capacity and excellent reusability could be a promising material for mitigation Pb(II) ions pollution just prepared from by-production from the paper industry.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
·
2018
·
IF 1.454
Xiu-mei Tai,Jin-yu Song,Zhi-ping Du,Xiaoying Liu,Tianzhuang Wang,Guoyong Wang
Hydrolytic stability, foaming power and foam stability, calcium soap dispersing ability and stability in hard water of fatty acid methyl ester sulfonate (MES) were measured by potentiometric titration, Ross-Miles foam instrument, improved acid titration and turbidimetric test, respectively. The dishwashing detergent formulations containing MES were designed and stability and detergency of dishwashing detergents have been tested. The results showed that when storage temperature was 45°C, MES in pH 4.5 ∼ 9 was stable, disodium α-sulfonated fatty acid esters content increased at pH 10, hydrolysis rate was accelerated; foaming power of MES was lower than sodium linear alkyl benzene sulfonate (LAS) and the foam stability was equivalent to that of LAS; MES showed very excellent calcium soap dispersing ability, calcium soap dispersing amount of MES was 2.5 g calcium soap /1 g MES and LAS was 0.34 g /1 g LAS; differential stability of MES in hard water was , and LAS was ; the performance test results of dishwashing detergent products partially substituted LAS by MES can both meet the requirements of the Chinese national standard.
研究领域:
化学工程
·
表面活性剂科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）