Abstract:
The present disclosure provides a method of purifying raw methanol obtained in chemical pulping, wherein heavy oil is admixed with the raw methanol to prevent precipitation, and the methanol mixture is distilled or evaporated to recover the methanol.
Abstract:
본 발명은 사이클로헥산 디카르복실산(Cyclohexane dicarboxylic acid, CHDA) 수소화 반응 과정에서 조절되는 특정 조건, 첨가제 투입 또는 반응물 첨가를 통하여 높은 트랜스 함량을 갖도록 할 수 있는 사이클로헥산 디메탄올 제조방법 및 이에 의해 제조된 사이클로헥산 디메탄올(Cyclohexane dimethanol, CHDM)에 관한 것이다.
Abstract:
The present invention relates generally to select rhodium-rhenium (Rh-Re) or iridium-rhenium (Ir-Re) catalysts and their use in processes for the catalytic hydrogenolysis of tetrahydrofurfuryl alcohol (THFA) to 1,5-pentanediol.
Abstract:
A system and method are disclosed for pretreating biomass and for processing the hydrolysate of biomass. In order to improve the efficiency of a biorefinery, carbohydrate and lignin in the hydrolysate of biomass are separated which may help improve the efficiency of the biorefinery process and also provide more efficient use of the carbohydrate and lignin.
Abstract:
A catalytic process for generating at least one polyol from a feedstock comprising cellulose is performed in a continuous manner using a catalyst comprising nickel tungsten carbide. The process involves, contacting, continuously, hydrogen, water, and a feedstock comprising cellulose, with the catalyst to generate an effluent stream comprising at least one polyol and recovering the polyol from the effluent stream.
Abstract:
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung und Reinigung von α,ω-Diolen wie insbesondere 1,6-Hexandiol (Adipol) unter Verwendung saurer Stoffe.
Abstract:
Die Erfindung betrifft ein Verfahren zur Stabilisierung von Polyolen sowie Mischungen enthaltend Polyole und Stabilisatoren. Als Stabilisatoren werden Verbindungen der Formel (I) oder (II) verwendet, in denen n für 1, 2, 3 oder 4 steht m für 1, 2 oder 3 steht p für 2 steht Q für Schwefel oder C 1 C 4 -Alkylen steht und R 1 jeweils unabhängig von gegebenenfalls vorhandenen anderen Resten R 1 für C 1 -C 8 - Alkyl oder C 1 -C 8 -Alkoxy steht, wobei weiterhin zumindest eine ortho-Position der beiden Phenylringe gemäß Formel (II) bzw. des Phenylrings gemäß Formel (I) mit einem sekundären oder tertiären Rest substituiert sein muss.
Abstract:
Carbonyl species contamination of liquid hydrocarbon media and corrosion of metal surfaces in contact with such media are inhibited. A high boiling point primary or secondary amine is added to the desired liquid hydrocarbon medium, and in one exemplary embodiment, the medium is then brought into contact with a separatory membrane such as a nanofiltration membrane. The permeate from the membrane is a highly purified hydrocarbon stream.
Abstract:
An organic phosphonate or an ester of a phosphoric acid, preferably a hydroxyphosphono carboxylic acid, is used as temperature-resistant additive for a glycol or a glycol ether, which is in turn used in a process excluding oxygen to a large extent and reaching temperatures of up to approximately 220 DEG C. The additive serves as anti-aging agent. An additive consists of an organic phosphonate or an ester of a phosphoric acid and a glycerin ester with at least one linear carboxylic acid containing a sterically hindered hydroxyphenyl group. An alternative additive contains a compound having a sterically hindered hydroxyphenyl group, an organic phosphonate or an ester of a phosphoric acid and an aromatic aminic antioxidant agent. Said additive can also contain a polycarboxylic acid and a tertiary alkanolamine. A preferred additive contains, dissolved in triethylene glycol: approximately 1-5 % by weight of hydroxy-phosphono-carboxylic acid; 0.01-2 % by weight of a sterically hindered phenol-alkylene-carboxylic acid mixed ester; 0.01-2 % by weight styronated N-phenylbenzolamine; 5-15 % by weight of a tertiary alkanolamine and 2.5-5 % by weight 6,6',6''-(1,3,5,-triazine-2,4,6-triyltriimino)-trihexanoic acid.