摘要:
Directed to functionalized saturated polymers having elastomeric characteristics and to compositions containing minor amounts thereof and to the process of making them.
摘要:
A method is disclosed for reducing the nitrogen content of oil shale by removing therefrom nitrogen-containing compounds. The nitrogen content of shale oil is reduced by agitating the shale oil with designated amounts of acidified spent oil shale. Acidification is obtained by contacting spent oil shale with sulfuric acid produced by oxidizing hydrogen sulfide emanating from the oil shale retorting process. Agitation of the acidified oil shale with nitrogen-containing oil shale can be either a batch or continuous process. The method also provides for recycling acidified spent shale back into the process for further reduction of the oil shale nitrogen content.
摘要:
Alkylated thianthrenes are high temperature stable lubricant fluids having excellent thermal stability, antiwear and load-carrying properties and excellent additive solubility as well as multifunctional additives for fuels.
摘要:
Epoxidized linear block, random, star-branched block or star-branched random polymers are disclosed which prior to epoxidation contain at least one conjugated diene having at least five carbon atoms of the formula (1) ##STR1## wherein R.sup.1 -R.sup.6 are each hydrogen or a hydrocarbyl group, provided that at least one of R.sup.1 -R.sup.6 is a hydrocarbyl group and the structure of the residual double bond in the polymerized diene of formula (1) has the formula (2) ##STR2## wherein R.sup.I, R.sup.II, R.sup.III and R.sup.IV are each hydrogen or a hydrocarbyl group, provided that either both R.sup.I and R.sup.II are hydrocarbyl groups or both R.sup.III and R.sup.IV are hydrocarbyl groups; and the remainder of the conjugated diene different from the diene of formula (1), has at least four carbon atoms of the formula (3) ##STR3## wherein R.sup.7 -R.sup.12 are each hydrogen or a hydrocarbyl group, provided that the structure of the residual double bond in the polymerized diene of formula (3) has the formula (4) ##STR4## wherein R.sup.a, R.sup.b, R.sup.c and R.sup.d are each hydrogen or a hydrocarbyl group, provided that one of R.sup.a or R.sup.b is hydrogen, one of R.sup.c and R.sup.d is hydrogen.
摘要:
There is disclosed a linear block copolymer comprising at least one triblock I-B-I, wherein I is a block of at least one polymerized conjugated diene of at least five (5) carbon atoms, such as isoprene, and B is a block of a polymer of at least one conjugated diene, different from that used to polymerize the block I, of at least four (4) carbon atoms, such as 1,3-butadiene. The B block is selectively hydrogenated, while each of the I blocks is unhydrogenated and therefore retains a sufficient amount of its original unsaturation to vulcanize the copolymer. There is also disclosed an alternative linear block copolymer containing at least one triblock of the first polymer block made from a minor proportion of at least one aryl-substituted olefin, such as styrene, and a major proportion of at least one conjugated diene used to polymerize the block I, the second middle polymer block of at least one diene used to polymerize the block B, and the third polymer block which is the same as the first polymer block. There are also disclosed random linear and star-branched block and random copolymers made from the same monomers as the linear block copolymers.
摘要:
The coking tendencies of heavy hydrocarbon feedstocks are reduced by treatment with a free radical removing catalyst such as a transition metal naphthenate, preferably at temperatures below 350.degree. C. The treated product has improved stability as such and may be treated in subsequent processing operations such as catalytic cracking and thermal cracking, including visbreaking and coking, with improved liquid yield and reduced coke production.
摘要:
The nitrogen-containing and oxygen-containing contaminants of a mineral oil are converted to the corresponding sulfur compounds by contacting the oil with a fresh catalyst containing metals from Groups VB, VIB and VIII or a deactivated and metals contaminated hydrodesulfurization catalyst in the presence of hydrogen and hydrogen sulfide under conditions of elevated temperature and pressure.
摘要:
In a coal liquefaction process, coal is admixed with about 1.0% to about 5.0% of lignin, based on the weight of the coal. In an alternative embodiment, feed of a resid processing method is admixed with 0.01% to 10% of lignin based on the weight of the coal.
摘要:
There is disclosed a linear block copolymer comprising at least one triblock I-B-I, wherein I is a block of at least one polymerized conjugated diene of at least five (5) carbon atoms, such as isoprene, and B is a block of a polymer of at least one conjugated diene, different from that used to polymerize the block I, of at least four (4) carbon atoms, such as 1,3-butadiene. The B block is selectively hydrogenated, while each of the I blocks is unhydrogenated and therefore retains a sufficient amount of its original unsaturation to vulcanize the copolymer. There is also disclosed an alternative linear block copolymer containing at least one triblock of the first polymer block made from a minor proportion of at least one aryl-substituted olefin, such as styrene, and a major proportion of at least one conjugated diene used to polymerize the block I, the second middle polymer block of at least one diene used to polymerize the block B, and the third polymer block which is the same as the first polymer block. In this alternative copolymer, the middle block is also selectively hydrogenated, thereby leaving the terminal polymer blocks with a sufficient amount of their original unsaturation to vulcanize the copolymer. The polymers can be crosslinked or functionalized through the terminal blocks containing the vinyl unsaturation. There are also disclosed random linear and star-branched block and random copolymers made from the same monomers as the linear block copolymers.Also disclosed are methods of producing the polymers and selectively hydrogenating the aforementioned polymerized dienes.