Arctech Inc.

Gas Research Institute

Kailash Chandra Srivastava

Daman S Walia

Hyderabed G Sanjay

Hyderabad G Sanjay

An adsorbent that can be used to remove environmental contaminants such as organics, cations and anions in a single process step is prepared from humic acid. The adsorbent can be a soluble humic acid in liquid form (e.g., in aqueous solution) or the humic acid can be insolubilized and/or immobilized on a solid support. The adsorbent can also be used to recover agriculturally desirable metals in chelated form from contaminated water. The liquid form of the adsorbent can be used to wash solids to remove contaminants.

Adsorbent

The present invention relates to a biological process for regenerating metal-containing sulfide mitigation catalysts that are commonly known in the natural gas processing industry as liquid redox catalysts. The invention further relates to a sulfide mitigation process wherein mitigation and regeneration are performed in a single reactor under substantially anaerobic conditions. The present invention also relates to a self regenerating catalyst composition for the mitigation of sulfides.

Microbial process and composition for the regeneration of catalysts

An anaerobic process of desulfurizing a sour natural gas stream wherein a selected consortium of chemoautotrophic bacteria converts H.sub.2 S and other sulfur species into elemental sulfur, which is recovered as a product. The process is conducted at pressures of up to 1000 psi and temperatures up to 140.degree. F. (10.degree. C. to 60.degree. C.), and mitigates up to 10,000 ppm H.sub.2 S to pipeline standards of .ltoreq.4 ppm and up to 10% CO.sub.2 to .ltoreq.2% CO.sub.2.

Microbial process for the mitigation of sulfur compounds from natural gas

Coal is treated aerobically or anaerobically to produce humic acid, volatile fatty acids, lower alcohols, and/or methane using a consortium of bacteria designated Mic-1 or KSARC56. This process can also be used to convert aromatic compounds, such as phenols and derivatives thereof, to methane and carbon dioxide.

Growing community of inventors

Centreville, VA, United States of America

Kailash Chandra Srivastava