Continuous neat polymerization and ambient grinding methods of polyolefin drag reducing agents

    公开(公告)号:US07119132B2

    公开(公告)日:2006-10-10

    申请号:US10694585

    申请日:2003-10-27

    IPC分类号: B05D5/08

    摘要: A process for continuously producing a polymer drag reducing agent (DRA) is described. The process concerns mixing a monomer and a catalyst in at least one continuously stirred tank reactor (CSTR) to form a mixture. The mixture is continuously injected into a volume continuously formed by a thermoplastic material, such as polyethylene. The thermoplastic material is periodically sealed off to form a temporary container or bag. The monomer is permitted to polymerize in the temporary container to form polymer. In one non-limiting embodiment, the polymerization in the bag takes place within an inert, circulating fluid that accelerates heat transfer. The polymer and the temporary container are then ground together, preferably at non-cryogenic temperatures, to produce a particulate polymer drag reducing agent. In one preferred, non-limiting embodiment, the grinding or pulverizing occurs in the presence of at least one solid organic grinding aid. Finally, the particulate polymer drag reducing agent may be combined with a dispersing fluid.

    Continuous neat polymerization and ambient grinding methods of polyolefin drag reducing agents
    4.
    发明授权
    Continuous neat polymerization and ambient grinding methods of polyolefin drag reducing agents 有权
    聚烯烃减阻剂的连续纯聚合和环境研磨方法

    公开(公告)号:US06649670B1

    公开(公告)日:2003-11-18

    申请号:US10321762

    申请日:2002-12-17

    IPC分类号: C08K501

    摘要: A process for continuously producing a polymer drag reducing agent (DRA) is described. The process concerns mixing a monomer and a catalyst in at least one continuously stirred tank reactor (CSTR) to form a mixture. The mixture is continuously injected into a volume continuously formed by a thermoplastic material, such as polyethylene. The thermoplastic material is periodically sealed off to form a temporary container or bag. The monomer is permitted to polymerize in the temporary container to form polymer. In one non-limiting embodiment, the polymerization in the bag takes place within an inert, circulating fluid that accelerates heat transfer. The polymer and the temporary container are then ground together, preferably at non-cryogenic temperatures, to produce a particulate polymer drag reducing agent. In one preferred, non-limiting embodiment, the grinding or pulverizing occurs in the presence of at least one solid organic grinding aid. Finally, the particulate polymer drag reducing agent may be combined with a dispersing fluid.

    摘要翻译: 描述了连续生产聚合物减阻剂(DRA)的方法。 该方法涉及在至少一个连续搅拌釜式反应器(CSTR)中混合单体和催化剂以形成混合物。 将混合物连续地注入由热塑性材料如聚乙烯连续形成的体积中。 周期性地密封热塑性材料以形成临时容器或袋子。 允许单体在临时容器中聚合以形成聚合物。 在一个非限制性实施方案中,袋中的聚合在加速热传递的惰性循环流体中进行。 然后将聚合物和临时容器一起研磨,优选在非低温温度下,以产生颗粒状聚合物减阻剂。 在一个优选的非限制性实施方案中,研磨或粉碎发生在至少一种固体有机研磨助剂的存在下。 最后,颗粒状聚合物减阻剂可与分散液组合。

    Low viscosity, high concentration drag reducing agent and method therefor
    5.
    发明授权
    Low viscosity, high concentration drag reducing agent and method therefor 失效
    低粘度,高浓度减阻剂及其方法

    公开(公告)号:US5733953A

    公开(公告)日:1998-03-31

    申请号:US496489

    申请日:1995-06-29

    摘要: Low viscosity, high concentration drag reducing agents may be prepared by slowly adding a liquid, non-solvent (e.g. isopropyl alcohol) for a drag reducing polymer (e.g. a polyalphaolefin) to a mixture of the polymer and the solvent (e.g. kerosene) in which the polymer is dissolved. When enough non-solvent is added, the polymer precipitates into fine particles. The supernatant mixture of solvent and non-solvent is then removed from the precipitated polymer slurry concentrate. Further solvent contained in the slurry concentrate may be removed by evaporation or further extraction with the liquid, non-solvent. The resulting slurry concentrate dissolves rapidly in flowing hydrocarbon streams to reduce the drag therein, and gives exceptionally good drag reducing results at low concentrations. Additionally, no injection probes or other special equipment is required to introduce the drag reducing slurry into the hydrocarbon stream, nor is grinding of the polymer necessary to form a suitable DRA slurry.

    摘要翻译: 低粘度,高浓度的减阻剂可以通过向聚合物和溶剂(例如煤油)的混合物中缓慢加入用于减阻聚合物(例如聚α-烯烃)的液体非溶剂(例如异丙醇)来制备,其中 聚合物溶解。 当加入足够的非溶剂时,聚合物沉淀成细颗粒。 然后从沉淀的聚合物淤浆浓缩物中除去溶剂和非溶剂的上清液混合物。 可以通过蒸发或用液体非溶剂进一步萃取来除去浆料浓缩物中所含的其它溶剂。 所得到的浆料浓缩物快速溶解在流动的烃流中以减少其中的阻力,并且在低浓度下给出非常好的减阻结果。 另外,不需要注射探针或其他特殊设备将减阻剂引入烃流中,也不需要研磨形成合适的DRA浆料所需的聚合物。

    Non-cryogenic process for grinding polyolefin drag reducing agents
    6.
    发明授权
    Non-cryogenic process for grinding polyolefin drag reducing agents 有权
    用于研磨聚烯烃减阻剂的非低温工艺

    公开(公告)号:US06946500B2

    公开(公告)日:2005-09-20

    申请号:US10322050

    申请日:2002-12-17

    IPC分类号: B29B13/10 C08J3/12 C08J3/11

    CPC分类号: C08J3/124 B29B13/10

    摘要: A process for producing fine particulate polymer drag reducing agent (DRA) without cryogenic temperatures, is described. The grinding or pulverizing of polymer, such as poly(alpha-olefin) may be achieved by the use of at least one solid organic grinding aid and at least one liquid grinding aid. In one non-limiting embodiment of the invention, the grinding is conducted at ambient temperature. Examples of a solid organic grinding aid include ethene/butene copolymer particles, paraffin waxes and solid alcohols. An example of a suitable liquid grinding aid includes a blend of glycol, water and isopropyl alcohol. Particulate DRA may be produced at a size of about 500 microns or less. Use of an attrition mill is preferred.

    摘要翻译: 描述了一种在没有低温的情况下生产细颗粒聚合物减阻剂(DRA)的方法。 聚合物如聚(α-烯烃)的研磨或粉碎可以通过使用至少一种固体有机研磨助剂和至少一种液体研磨助剂来实现。 在本发明的一个非限制性实施方案中,研磨在环境温度下进行。 固体有机研磨助剂的实例包括乙烯/丁烯共聚物颗粒,石蜡和固体醇。 合适的液体研磨助剂的实例包括二醇,水和异丙醇的共混物。 颗粒状DRA可以以约500微米或更小的尺寸生产。 优选使用研磨机。

    Process to improve isocyanate yield upon pyrolysis of a polyfunctional
urethane which has been extracted with a combination of hydrochloric
acid and alcohol
    7.
    发明授权
    Process to improve isocyanate yield upon pyrolysis of a polyfunctional urethane which has been extracted with a combination of hydrochloric acid and alcohol 失效
    通过盐酸和醇的组合提取的多官能氨基甲酸酯热分解提高异氰酸酯收率的方法

    公开(公告)号:US4369141A

    公开(公告)日:1983-01-18

    申请号:US295951

    申请日:1981-08-24

    申请人: John F. Motier

    发明人: John F. Motier

    CPC分类号: C07C263/04

    摘要: In the process of producing polyisocyanates by(a) condensing an alkyl-N-phenylcarbamate having 1 to 3 carbons in the alkyl moiety with formaldehyde, paraformaldehyde a formaldehyde forming compound such as trioxane in the presence of an acid to produce a condensate containing a mixture of diphenylmethane dicarbamates and polymethylene polyphenyl carbamates with by-product N-benzyl compounds, rearranging said N-benzyl compounds in said condensate with acid catalyst to obtain a pyrolysis feed mixture containing a mixture of diphenylmethane dicarbamates and polymethylene polyphenyl carbamates with by-product amine and amine salts, and(b) thermally decomposing the carbamate moieties in the pyrolysis feed mixture to isocyanate moieties to produce a polyisocyanate mixture of diphenylmethane diisocyanates and polymethylene polyphenyl isocyanates,the improvement comprises increasing the percent isocyanate content of said polyisocyanates by prior to step (b) removing the amine and amine salt by-products by extracting the pyrolysis feed mixture with a solution of an alkanol having 1 to 4 carbon atoms in the alkyl moiety and aqueous hydrochloric acid, and then removing the alcohol-hydrochloric acid extract.

    摘要翻译: 在(a)在酸存在下,通过(a)将烷基部分中具有1至3个碳原子的烷基-N-苯基氨基甲酸酯与甲醛,多聚甲醛和形成甲醛的化合物如三恶烷进行缩合生产多异氰酸酯的方法,以产生含有混合物的冷凝物 的二苯基甲烷二氨基甲酸酯和聚亚甲基多苯基氨基甲酸酯与副产物N-苄基化合物,用酸催化剂重排所述缩合物中的所述N-苄基化合物,得到含有二苯基甲烷二氨基甲酸酯和聚亚甲基多苯基氨基甲酸酯与副产物胺的混合物的热解进料混合物, 胺盐,和(b)将热解原料混合物中的氨基甲酸酯部分热分解成异氰酸酯部分以产生二苯基甲烷二异氰酸酯和多亚甲基多苯基异氰酸酯的多异氰酸酯混合物,其改进包括在步骤(b)之前增加所述多异氰酸酯的异氰酸酯含量百分比 )除去胺和胺盐 通过在烷基部分和盐酸水溶液中用具有1至4个碳原子的链烷醇的溶液萃取热解进料混合物,然后除去醇 - 盐酸提取物来产生副产物。

    Process for homogenizing polyolefin drag reducing agents
    8.
    发明授权
    Process for homogenizing polyolefin drag reducing agents 有权
    均质聚烯烃减阻剂的方法

    公开(公告)号:US06894088B2

    公开(公告)日:2005-05-17

    申请号:US10395416

    申请日:2003-03-24

    CPC分类号: C08J3/12 C08J2323/02

    摘要: A process for producing polymer drag reducing agent (DRA) slurries without cryogenic temperatures or conventional grinding is described. The homogenizing or size reduction of polymer, such as poly(alpha-olefins), may be achieved by the use of granulated polymer and at least one liquid, non-solvent for the polymer DRA. In one non-limiting embodiment of the invention, the homogenizing is conducted at ambient temperature. Examples of suitable non-solvents include water and non-aqueous non-solvents including, but not necessarily limited to, alcohols, glycols, glycol ethers, ketones, and esters; having from 2-6 carbon atoms, and combinations thereof. The polymeric DRA may be homogenized to an average particle size of about 600 microns or less.

    摘要翻译: 描述了没有低温或常规研磨制备聚合物减阻剂(DRA)浆料的方法。 可以通过使用颗粒状聚合物和至少一种用于聚合物DRA的液体非溶剂来实现聚合物(例如聚(α-烯烃))的均化或尺寸减小。 在本发明的一个非限制性实施方案中,均化在环境温度下进行。 合适的非溶剂的实例包括水和非水性非溶剂,包括但不一定限于醇,二醇,二醇醚,酮和酯; 具有2-6个碳原子,及其组合。 聚合物DRA可以均化至约600微米或更小的平均粒度。

    Zirconium phosphine complex catalyst
    9.
    发明授权
    Zirconium phosphine complex catalyst 失效
    锆膦配合物催化剂

    公开(公告)号:US4026822A

    公开(公告)日:1977-05-31

    申请号:US488134

    申请日:1974-07-12

    IPC分类号: B01J31/24 B01J31/02

    摘要: A catalyst composition for the polymerization, including oligomerization and codimerization, of olefins is provided by combining (A) zirconium, (B) a monophosphine electron donor ligand, and (C) a Lewis acid-reducing agent, in molar ratios of (B) to (A) of about 1 to 10:1 and (C) to (A) of about 1 to 40:1. Preferred catalyst components are zirconium acetylacetonate, triphenylphosphine or tri-n-butylphosphine and ethylaluminum sesquichloride. The catalyst composition of this invention may be employed in the dimerization of olefins such as propylene as well as in codimerization reactions, such as the preparation of heptenes from propylene and butenes.

    摘要翻译: 通过将(A)锆,(B)单膦电子供体配体和(C)路易斯酸还原剂(摩尔比)为(B)和(B)的组合,提供了用于聚合的包括低聚和共聚的烯烃的催化剂组合物, 至(A)为约1至10:1,(C)至(A)为约1至40:1。 优选的催化剂组分是乙酰丙酮酸锆,三苯基膦或三正丁基膦和乙基倍半氯化铝。 本发明的催化剂组合物可以用于烯烃如丙烯的二聚,以及在聚合反应中,例如由丙烯和丁烯制备庚烯。