Characterization of Dialkyldithiophosphates as Slow Hydrogen Sulfide Releasing Chemicals and Their Effect on the Growth of Maize
摘要:
Hydrogen sulfide is a key gasotransmitter for plants and has been shown to greatly increase their growth and survival in the presence of environmental stressors. Current methods for slowly releasing hydrogen sulfide use chemicals, such as GYY-4137, but these result in the release of chemicals not found in the environment, and chemicals used may lack structures that can be readily tuned to affect the rate of release of hydrogen sulfide. In this article, we describe the synthesis and slow release of hydrogen sulfide from dialkyldithiophosphates, which are a new set of hydrogen sulfide releasing chemicals that can be used in agriculture. The rates of hydrolysis of dibutyldithiophosphate and GYY-4137 were measured in water at 85 degrees C and compared with each other to investigate their differences. GYY-4137 is widely used as a chemical that slowly releases H2S, but its rate of release was not previously quantified. The release of hydrogen sulfide in water at room temperature was measured for a series of dialkyldithiophosphates using a hydrogen sulfide electrode. It was shown that the structure of the dialkyldithiophosphate affected the amount of hydrogen sulfide released. The final degradation products of dibutyldithiophosphate were shown to be phosphoric acid and butanol, which are chemicals found in the environment. This result was notable because it demonstrated that dialkyldithiophosphates degrade to safe, natural chemicals that will not pollute the environment. To demonstrate that dialkyldithiophosphates have potential applications in agriculture, maize was grown for 4.5 weeks after exposure to 1-200 mg of dibutyldithiophosphate, and the weight of corn plants increased by up to 39% at low loadings of dibutyldithiophosphate.
申请人:KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY 한국화학연구원(319980077651)
公开号:KR20180112211A
公开(公告)日:2018-10-12
본 발명은 디알킬 디티오포스페이트 그룹을 포함하는 디카르복실산 유도체 화합물 및 이를 포함하는 내마모제 및 윤활유 조성물을 제공한다. 본 발명에 따른 디알킬 디티오포스페이트 그룹을 포함하는 디카르복실산 유도체 화합물을 포함하는 윤활유 조성물은 내마모성능이 종래 윤활유 조성물보다 우수할 뿐만 아니라, 종래 윤활유 조성물보다 적은 함량으로 사용하여도 보다 우수한 효과를 나타내고, 중금속을 사용하지 않아 친환경적이므로, 엔진유, 변속기용 윤활유, 기어-기름, 터빈유, 작동유, 냉동기유, 압축기유, 진공펌프유, 베어링유, 미끄럼면유, 작암유, 금속 절삭유, 소성가공유, 열처리유, 윤활유 또는 가공유의 첨가제로 유용하게 사용될 수 있다.
[EN] PROCESSES FOR CONVERTING CARBOXAMIDES TO THIOCARBOXAMIDES<br/>[FR] PROCÉDÉS POUR CONVERTIR DES CARBOXAMIDES EN THIOCARBOXAMIDES
申请人:VERTELLUS SPECIALTIES INC
公开号:WO2016182900A1
公开(公告)日:2016-11-17
Process for converting a carboxamide to a thiocarboxamide includes reacting (a) a substrate that comprises a heteroatom-containing moiety and a carboxamide moiety with (b) a dialkyl dithiophosphate and/or a salt thereof. The heteroatom-containing moiety includes a heteroatom selected from the group consisting of N, O, and S. Processes for preparing piperidine-4-thiocarboxamide are described.
This invention is directed to a lubricating oil composition comprising a non-metallic antioxidant antiwear additive system comprising particular organic disulfide compounds and trivalent organophosphorous compounds.