摘要:
Methacrylamidopropyltrimethylammonium chloride or its free amine, dimethylaminopropylmethacrylamide, is purified by contacting aqueous solutions of the salt or the free amine with solid, nonionic organic resins. Such resins absorb the organic impurities, yet leave behind the polymerization inhibitor.
摘要:
The corrosion of iron and steel surfaces by an aqueous alkanolamine conditioning solution used to remove CO.sub.2 from a gas stream is effectively inhibited by a combination of a vanadium containing ion and a di- or triamine. A surprising fact is that some of the amine co-inhibitors have been identified by others in the art as promoting ferrous metal corrosion.
摘要:
A process is provided for recovering substantially pure triethylenediamine in liquid lower alkylene diol solutions directly from the crude triethylenediamine reaction mixture without resort to a need to purify the triethylenediamine by crystallization. The process includes initially admixing a lower alkylene diol with a crude triethylenediamine liquid reaction product mixture. The admixture thus formed is then heated to remove water and other low boiling impurities. The crude triethylene diaminediol bottoms mixture is then codistilled to recover a pure triethylene diamine product in diol solvent which can be used directly to catalyze urethane systems.
摘要:
Covers a new composition of matter comprising an acrylamide or methacrylamide monomer characterized by the following structural formula: ##STR1## where R.sub.1 is hydrogen or methyl, R.sub.2 and R.sub.3 are lower alkyl, R.sub.4 is a linear or branched alkyl group containing 7-20 carbon atoms, X is an anion of an organic or mineral acid having a valence m and A is a divalent lower alkyl group.
摘要:
This invention discloses an oil soluble polyether composition, comprising: ##STR1## wherein R is either a C.sub.14-20 alkyl or C.sub.9-12 alkylphenyl; A is ##STR2## where x is from 7 to 13; i, j, k, and l are each independently from 0 to 35 and the sum (i+j+k+l) is from 8 to 35;o, p, and q are each independently 0 to 1 and the sum (o+p+q) is from 0 to 3; and,the average mole ratio of the glycidyl ether monomeric unit A to the initiator unit RO is from 0.4:1 to 1.5:1.This invention also discloses an anionic polymerization process for producing an oil soluble polyether composition, comprising reacting a mixture of propylene oxide and a C.sub.8-14 alkyl glycidyl ether with an initiator obtained from the group consisting of a C.sub.14-20 alkanol and a C.sub.9-12 alkylphenol under the influence of an alkaline metal alkoxide catalyst.
摘要翻译:本发明公开了一种油溶性聚醚组合物,其包含:其中R为C14-20烷基或C9-12烷基苯基; A是,其中x是7到13; i,j,k和l各自独立地为0至35,并且和(i + j + k + 1)为8至35; o,p和q各自独立地为0〜1,和(o + p + q)为0〜3; 缩水甘油醚单体单元A与引发剂单元RO的平均摩尔比为0.4:1〜1.5:1。 本发明还公开了一种用于生产油溶性聚醚组合物的阴离子聚合方法,其包括将环氧丙烷和C 8-14烷基缩水甘油醚的混合物与由C14-20烷醇和C9-12 烷基酚在碱金属醇盐催化剂的影响下。
摘要:
Aqueous fluids are thickened with epoxide modified polyoxyalkylene diamines. The polyoxyalkylene diamines are of the formula:H.sub.2 NCH(CH.sub.3)CH.sub.2 O(CH.sub.2 CH(R)O).sub.x CH.sub.2 CH(CH.sub.3)NH.sub.2wherein:R is methyl or hydrogen andx is a number selected to give the diamine a molecular weight of 3000 to 9000.The epoxide is a hydrophobic monoepoxide, diepoxide or mixture thereof.The aqueous fluid optionally incorporate ethylene glycol. They are useful for water/glycol base hydraulic fluids, cosmetics and surfactants.
摘要:
Carbon dioxide is selectively removed from an acid gas stream containing carbon dioxide and sulfur-containing components including hydrogen sulfide by counter-currently contacting the acid gas stream with an aqueous solution of a treating agent in order to selectively absorb carbon dioxide from the gas stream, the treating agent being an aqueous solution of a polyoxypropylene triamine having the formula: ##STR1## wherein R' represents a methylene group and R" represents hydrogen or methyl or ethyl and wherein the sum of x+y+z is a positive integer having a value of from about 4 to about 6.
摘要翻译:通过将酸性气体流与处理剂的水溶液反向接触,从含有二氧化碳和含硫成分(包括硫化氢)的酸性气体流中选择性地除去二氧化碳,以从气流中选择性地吸收二氧化碳, 处理剂是具有下式的聚氧丙烯三胺的水溶液:其中R'表示亚甲基,R“表示氢或甲基或乙基,并且其中x + y + z的和是具有 约4至6的值。
摘要:
A process is disclosed for the preparation of ethylene glycol and dimethyl carbonate by reacting methanol and ethylene carbonate in the presence of a series of heterogenous catalyst systems including ion exchange resins with tertiary amine, quaternary ammonium, sulfonic acid and carboxylic acid functional groups, alkali and alkaline earth silicates impregnated into silica and ammonium exchanged zeolites.
摘要:
Amphoteric surface active monomers and monomer solutions are revealed.The monomers are synthesized by reacting a tertiary amine substituted acrylamide, an alkylene oxide and a succinic anhydride compound in aprotic polar solvent.These compositions are useful for their surface activity and their ability to copolymerize with water soluble vinyl monomers and impart surface activity to the resulting copolymer. The monomers and copolymers thereof may be used as flocculants or for stabilizing polymeric latex.
摘要:
A one-step process for the preparation of N-substituted (meth)acrylamides from the reaction of a (meth)acrylate ester and an amine over a catalytic amount of a metal alkoxide catalyst is described. These catalysts, such as stannous dimethoxide, lead dimethoxide, zinc dimethoxide, copper dimethoxide and bismuth tributoxide give high selectivity to the N-substituted (meth)acrylamides and little selectivity of the Michael adduct propionate ester, which would predominate in the absence of these catalysts. Also, these catalysts are less costly than organo metal catalysts commonly used.