公开(公告)号：US11753590B2

公开(公告)日：2023-09-12

申请号：US17826287

申请日：2022-05-27

Applicant: King Fahd University of Petroleum and Minerals

Inventor： Ismail Abdulazeez ,  Othman Al-Hamouz ,  Abdulaziz Al-Saadi ,  Mazen Khaled

IPC: C09K15/20 ,  C23F11/14

CPC classification number: C09K15/20 ,  C23F11/147

Abstract: Methods for preventing, inhibiting, or reducing metal (e.g. mild steel) corrosion in aqueous media utilizing a water-soluble formulation having a polyurea pre-dissolved in a polar aprotic solvent are described. The polyurea contains reacted units of a diisocyanate and a diaminoalkane. The effectiveness of the methods is demonstrated by corrosion inhibition efficiency and corrosion rate of metallic substrates in aqueous acidic environments using the water-soluble formulation.

公开(公告)号：US11414764B2

公开(公告)日：2022-08-16

申请号：US16654568

申请日：2019-10-16

Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS

Inventor： Mazen Khaled ,  Abdulaziz A. Al-Saadi ,  Ismail Abdulazeez ,  Othman Al-Hamouz

IPC: C23F11/14

Abstract: A method of inhibiting corrosion of metal in contact with a corrosive medium in an oil or gas field environment, whereby a formulation containing a polyurea is introduced into the corrosive medium in contact with the metal, wherein the polyurea is formed from a polymerization reaction between a piperazine having at least two reactive amine groups and a diisocyanate. The polyurea is introduced into the corrosive medium at a concentration of 1 to 250 ppm.

公开(公告)号：US11377595B2

公开(公告)日：2022-07-05

申请号：US16361355

申请日：2019-03-22

Applicant: King Fahd University of Petroleum and Minerals

Inventor： Ismail Abdulazeez ,  Othman Al-Hamouz ,  Abdulaziz Al-Saadi ,  Mazen Khaled

IPC: C09K15/20 ,  C23F11/14

Abstract: Methods for preventing, inhibiting, or reducing metal (e.g. mild steel) corrosion in aqueous media utilizing a water-soluble formulation having a polyurea pre-dissolved in a polar aprotic solvent are described. The polyurea contains reacted units of a diisocyanate and a diaminoalkane. The effectiveness of the methods is demonstrated by corrosion inhibition efficiency and corrosion rate of metallic substrates in aqueous acidic environments using the water-soluble formulation.

公开(公告)号：US11851598B2

公开(公告)日：2023-12-26

申请号：US17826348

申请日：2022-05-27

Applicant: King Fahd University of Petroleum and Minerals

Inventor： Ismail Abdulazeez ,  Othman Al-Hamouz ,  Abdulaziz Al-Saadi ,  Mazen Khaled

IPC: C09K15/20 ,  C23F11/14

CPC classification number: C09K15/20 ,  C23F11/147

Abstract: Methods for preventing, inhibiting, or reducing metal (e.g. mild steel) corrosion in aqueous media utilizing a water-soluble formulation having a polyurea pre-dissolved in a polar aprotic solvent are described. The polyurea contains reacted units of a diisocyanate and a diaminoalkane. The effectiveness of the methods is demonstrated by corrosion inhibition efficiency and corrosion rate of metallic substrates in aqueous acidic environments using the water-soluble formulation.

公开(公告)号：US20190330081A1

公开(公告)日：2019-10-31

申请号：US16022000

申请日：2018-06-28

Applicant: King Fahd University of Petroleum and Minerals

Inventor： Tahar Laoui ,  Fatai Abidemi Olabemiwo ,  Bassam Tawabini ,  Mazen Khaled

IPC: C02F1/28 ,  B01J20/20 ,  B01J20/32

Abstract: A polyelectrolyte coated fly ash is described with a method of making and a method of using for the adsorption of a contaminant from a solution. The polyelectrolyte coated fly ash may be made by treating the oil fly ash with acid, and then contacting the product with a positive polyelectrolyte to create a first polyelectrolyte layer, and then with a negative polyelectrolyte to create a negative polyelectrolyte layer. The resulting polyelectrolyte coated fly ash quickly adsorbs contaminants from solution, and may be cleaned and reused.