shanxi Haian Industry Co.

Fengcheng, China

shanxi Haian Industry Co.

Fengcheng, China

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Chen G.,Xi'an Shiyou University | Su H.-J.,Xi'an Shiyou University | Zhang M.,Xi'an Shiyou University | Huo F.,Xi'an Shiyou University | And 3 more authors.
Chemistry Central Journal | Year: 2012

Isatin, an extract from Strobilanthes cusia (Nees) Kuntze, was the base for synthesizing derivatives that were screened for antibacterial activity against oilfield water-borne bacteria. The bacterial groups are sulfate reducing, iron and total. The derivatives were characterized by spectrums and they showed good to moderate activity against sulfate reducing bacteria. © 2012 Chen et al.; licensee Chemistry Central Ltd.


Zhang J.,Xi'an Shiyou University | Song Y.,Xi'an Shiyou University | Su H.,Xi'an Shiyou University | Zhang L.,Xi'an Shiyou University | And 2 more authors.
Chemistry Central Journal | Year: 2013

Background: Hydrochloric acid is used in oil-well acidizing commonly for improving the crude oil production of the low-permeable reservoirs, while it is a great challenge for the metal instruments involved in the acidification. Developing natural products as oilfield chemicals is a straight way to find less expensive, green and eco-friendly materials. The great plant resources in Qin-ling and Ba-shan Mountain Area of Shannxi Province enable the investigating of new green oil field chemicals. Diospyros Kaki L.f (persimmon), a famous fruit tree is widely planted in Qin-ling and Ba-shan Mountain Area of Shaanxi Province. It has been found that the crude persimmon extracts are complex mixtures containing vitamins, p-coumaric acid, gallic acid, catechin, flavonoids, carotenoids and condensed tannin and so on, which indicates the extracts of persimmon husk suitable to be used as green and eco-friendly corrosion inhibitors.Findings: Extracts of persimmon husk were investigated, by using weight loss and potentiodynamic polarisation techniques, as green and eco-friendly corrosion inhibitors of Q235A steel in 1M HCl. The inhibition efficiency of the extracts varied with extract concentration from 10 to 1,000 mg/L. There are some synergistic effects between the extracts and KI, KSCN and HMTA. Potentiodynamic polarization studies indicate that extracts are mixed-type inhibitors. Besides, the extracts were screened for antibacterial activity against oil field microorganisms, and they showed good to moderate activity against SRB, IB and TGB.Conclusions: The inhibition efficiency of the extracts varied with extract concentration from 10 to 1,000 mg/L, and the highest reaches to 65.1% with the con concentration of 1,000 mg/L WE. KI, KSCN and HMTA they can enhance the IE of WE effectively to 97.3% at most, but not effective for KI and KSCN to AE. Tafel polarisation measurements indicate the extracts behave as mixed type inhibitor. Investigation of the antibacterial activity against oil field microorganism showed the extracts can inhibit SRB, IB and TGB with moderate to highly efficiency under 1,000 mg/L, which makes extracts potential to be used as bifunctional oil field chemicals. © 2013 Zhang et al.; licensee Chemistry Central Ltd.


Chen G.,Xi'an Shiyou University | Zhang M.,Xi'an Shiyou University | Zhao J.,shanxi Haian Industry Co. | Zhou R.,Xi'an Shiyou University | And 2 more authors.
Chemistry Central Journal | Year: 2013

Ginkgo biloba (Ginkgoaceae), originating from China, now distributes all over the world. Wide application of Ginkgo biloba extracts is determined by the main active substances, flavonoids and terpenoids, which indicates its extracts suitable to be used as an effective corrosion inhibitor. The extracts of Ginkgo biloba leave have been investigated on the corrosion inhibition of Q235A steel with weight loss and potentiodynamic polarisation techniques. The inhibition efficiency of the extracts varies with extract concentration. The extracts inhibit corrosion mainly by adsorption mechanism. Potentiodynamic polarisation studies show that extracts are mixed type inhibitors. The antibacterial activity of the extracts against oil field microorganism (SRB, IB and TGB) was also investigated. © 2013 Chen et al.; licensee Chemistry Central Ltd.


Chen G.,Xi'an Shiyou University | Su H.-J.,Xi'an Shiyou University | Song Y.-P.,Xi'an Shiyou University | Gao Y.,Xi'an Shiyou University | And 3 more authors.
Research on Chemical Intermediates | Year: 2013

A series of inhibitors - isatin derivatives aimed at anticorrosion of Q235A steel - was synthesized. The molecule structures were analyzed by NMR and MS. The inhibition on the corrosion in a concentrated HCl solution as high as 3 M was studied by weight loss, molecular simulation, and potentiodynamic polarization. The results indicate that isatin derivatives act as mixed type (cathodic/anodic) inhibitors. Several compounds were investigated in the formulations, during which compound 6 shows 95.5 % inhibition efficiency under the concentration of 100 mg/L accompanied by urotropine and 1,4-dihydroxy-2- butyne. © 2012 Springer Science+Business Media Dordrecht.

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