公开(公告)号：US4399236A

公开(公告)日：1983-08-16

申请号：US299418

申请日：1981-09-04

Applicant: Georg Niederdellmann ,  Norbert Roemer ,  Jurgen Schenk ,  Hartmut Hetzel ,  Ernst Grigat

Inventor： Georg Niederdellmann ,  Norbert Roemer ,  Jurgen Schenk ,  Hartmut Hetzel ,  Ernst Grigat

IPC: C08G18/00 ,  C08G18/82 ,  C08J11/00 ,  C08J11/10 ,  C08J11/04 ,  C08G18/48

CPC classification number: C08J11/10 ,  C08J2375/04 ,  Y02W30/702

Abstract: The present invention is directed to a process for separating polyurethane hydrolyzates, preferably polyurethane foam hydrolyzates, into substantially amine-free foamable polyethers and diamines, comprising (a) (i) briefly expanding a hot polyurethane hydrolyzate obtained in a continuous screw extruder to normal pressure or in vacuo and, without using readily volatile components (ii) spraying said hydrolyzate directly into a tubular coil evaporator which is heated to 180.degree.-300.degree. C. and at the end of which a pressure of from 0.1 to 20 mbar is applied and (iii) separating a hydrolyzate containing less than 1% by weight of NH.sub.2 in a following cyclone from most of the diamine evaporated and all the solvent used, the diamine being separated from the solvent used in a following distillation column, optionally without any further heat input; (b) precipitating any diamine still present quantitatively in the form of its hydrochloride by introducing excess hydrogen chloride into the hydrolyzate, optionally diluted with inert solvents; and (c) the regenerated polyether obtained after removal by filtration of the precipitated amine salt being freed under reduced pressure from inert solvent and excess hydrogen chloride.

Abstract translation: 本发明涉及将聚氨酯水解物（优选聚氨酯泡沫水解产物）分离成基本上不含胺的可发泡聚醚和二胺的方法，其包括（a）（i）将在连续螺杆挤出机中获得的热聚氨酯水解产物短暂膨胀至常压 或在真空中，并且不使用易挥发性组分（ii）将所述水解产物直接喷射到加热至180-300℃的管状线圈蒸发器中，并且其末端施加0.1至20mbar的压力， （iii）在以下旋风分离器中从大部分蒸发的二胺和所有使用的溶剂中分离含有小于1重量％的NH 2的水解产物，二胺与随后的蒸馏塔中使用的溶剂分离，任选没有任何进一步的热 输入 （b）通过将过量的氯化氢引入水解产物中，任选地用惰性溶剂稀释，沉淀出以其盐酸盐形式定量存在的任何二胺; 和（c）通过过滤除去沉淀的胺盐后得到的再生聚醚，在惰性溶剂和过量的氯化氢中减压除去。

公开(公告)号：US4136967A

公开(公告)日：1979-01-30

申请号：US816637

申请日：1977-07-18

Applicant: Ernst Grigat ,  Hartmut Hetzel

Inventor： Ernst Grigat ,  Hartmut Hetzel

IPC: B29C47/10 ,  B29C47/76 ,  B29C47/92 ,  C08J11/14 ,  B29B1/10 ,  B01F7/08

CPC classification number: B29C47/76 ,  B29C47/1063 ,  B29C47/766 ,  B29C47/92 ,  C08J11/14 ,  B29C2947/92019 ,  B29C2947/92161 ,  B29C2947/92409 ,  B29C2947/92514 ,  B29C2947/92657 ,  B29C2947/92904 ,  B29C47/0009 ,  B29K2105/0005 ,  Y02W30/704

Abstract: An apparatus for hydrolytic degradation of plastics in which plastic material is deposited into a tubular housing via a feed hopper. An elongated screw shaft has a first section in the form of a high pitch screw thread disposed below the feed hopper to receive and advance the material to a second section. The second section of the screw shaft is in the form of a lower pitch thread for compressing the plastic material and transferring it to a longer, third section in the form of kneading discs, from which material passes through an outlet nozzle section to a cyclone separator where trapped gases and liquid may be withdrawn. The tubular housing is vented upstream of the feed hopper and a water inlet pipe is disposed adjacent to the second section of the screw shaft, downstream of the feed hopper. The outlet nozzle section is provided with pressure measuring and regulating means and a liquid level measuring and regulating device.

Abstract translation: 一种用于塑料的水解降解的装置，其中通过进料斗将塑料材料沉积到管状壳体中。 细长的螺杆轴具有设置在进料斗下方的高螺距螺纹形式的第一部分，以将材料接收并推进到第二部分。 螺杆轴的第二部分是下螺纹螺纹的形式，用于压缩塑料材料并将其转移到以捏合盘形式的较长的第三部分，材料从该混合盘通过出口喷嘴部分到旋风分离器 捕获的气体和液体可能被抽出。 管状壳体在进料斗的上游排出，并且进水管与进料斗的下游的螺杆轴的第二部分相邻设置。 出口喷嘴部分设有压力测量和调节装置和液位测量和调节装置。

公开(公告)号：US5817211A

公开(公告)日：1998-10-06

申请号：US760937

申请日：1996-12-06

Applicant: Clemens Casper ,  Dieter Grenner ,  Hartmut Hetzel

Inventor： Clemens Casper ,  Dieter Grenner ,  Hartmut Hetzel

IPC: B01D1/00 ,  B01D1/02 ,  B01D1/16 ,  B01D1/22 ,  B01D3/06 ,  B01D3/08 ,  B01D3/34

CPC classification number: B01D1/02 ,  B01D3/06 ,  B01D3/08 ,  B01D3/343

Abstract: The viscosity of a fluid liquid substance is first increased in a multiphase coil in the presence of a gas phase flowing at high speed and then, with separation of the gas phase, the substance is applied to a stirred bed consisting of a solid granular material where it is converted into a solid substance.

Abstract translation: 流体液体物质的粘度首先在高速流动的气相存在下在多相线圈中增加，然后在分离气相的同时，将物质施加到由固体颗粒材料组成的搅拌床上， 它被转化为固体物质。

公开(公告)号：US4143072A

公开(公告)日：1979-03-06

申请号：US900539

申请日：1978-04-27

Applicant: Hartmut Hetzel ,  Pramod Gupta ,  Hans-Joachim Sandhagen

Inventor： Hartmut Hetzel ,  Pramod Gupta ,  Hans-Joachim Sandhagen

IPC: C08G65/00 ,  C08G65/02 ,  C08G65/30

CPC classification number: C08G65/30

Abstract: This invention relates to a process for the removal of troublesome secondary products, particularly small quantities of water, solvents, low molecular weight glycols, and pungent-smelling substances, from polyethers by means of a tubular coil evaporator.

公开(公告)号：US4992171A

公开(公告)日：1991-02-12

申请号：US486472

申请日：1990-02-28

Applicant: Hartmut Hetzel

Inventor： Hartmut Hetzel

IPC: B01D35/00 ,  B01D29/01 ,  B01D29/075 ,  B01F7/18

CPC classification number: B01D29/01 ,  B01D2029/075

Abstract: The present invention relates to a filtering device with an agitator. The filtering device broadly consists of a horizontal filter plate with a central discharge opening and an agitator shaft disposed vertically and centrally to the filter plate. The agitator shaft has two agitator arms, with agitator blades being disposed on the agitator arms, pointing towards the filter plate and set at an angle to their circular path.

Abstract translation: 本发明涉及具有搅拌器的过滤装置。 过滤装置广泛地由具有中心排放口的水平过滤板和垂直设置在过滤板中心的搅拌轴组成。 搅拌器轴具有两个搅拌器臂，搅拌器叶片设置在搅拌器臂上，指向过滤板并以与其圆形路径成一定角度设置。

公开(公告)号：US4051212A

公开(公告)日：1977-09-27

申请号：US608853

申请日：1975-08-29

Applicant: Ernst Grigat ,  Hartmut Hetzel

Inventor： Ernst Grigat ,  Hartmut Hetzel

IPC: B01J19/20 ,  B09B3/00 ,  B29B11/00 ,  B29B17/00 ,  C08F6/00 ,  C08G85/00 ,  C08J11/00 ,  C08J11/14 ,  C07C87/14 ,  B29H19/00

CPC classification number: B29C47/766 ,  C08J11/14 ,  B29C47/0009 ,  Y02W30/704 ,  Y10S264/911 ,  Y10S264/916

Abstract: The instant invention relates to a continuous process for the hydrolytic degradation of plastics wherein a hydrolyzable material is introduced with water into a screw machine, and is subjected therein to a temperature of 100 to 300.degree. C, and a pressure of 5 to 100 bars for 2 to 100 minutes. The invention also relates to an apparatus useful in conducting the process.

公开(公告)号：US3993641A

公开(公告)日：1976-11-23

申请号：US623284

申请日：1975-10-17

Applicant: Eckhard Tiemann ,  Artur Reischl ,  Klaus Konig ,  Hartmut Hetzel

Inventor： Eckhard Tiemann ,  Artur Reischl ,  Klaus Konig ,  Hartmut Hetzel

IPC: C07B61/00 ,  B01J31/00 ,  C07D229/00 ,  C08G18/79

CPC classification number: C08G18/798 ,  C07D229/00

Abstract: The instant invention is directed to a process for the continuous production of aromatic polyisocyanates containing uretdione groups. The process broadly comprising dimerizing an aromatic polyisocyanate in a continuous, coolable screw reactor at a temperature of from -30.degree. to +70.degree. C.

Abstract translation: 本发明涉及连续生产含有脲二酮基团的芳族多异氰酸酯的方法。 该方法广泛地包括在-30℃至+ 70℃的温度下在连续可冷却的螺杆反应器中使芳族多异氰酸酯二聚。

公开(公告)号：US06271414B1

公开(公告)日：2001-08-07

申请号：US09297350

申请日：1999-04-29

Applicant: Rüdiger Drope ,  Dieter Grenner ,  Hartmut Hetzel ,  Hans-Peter Schal ,  Gerhard Wegener

Inventor： Rüdiger Drope ,  Dieter Grenner ,  Hartmut Hetzel ,  Hans-Peter Schal ,  Gerhard Wegener

IPC: C07C25100

CPC classification number: C07C263/20 ,  C07C265/14

Abstract: A process is described for obtaining pure isocyanate isomers from a mixture of isocyanate isomers by suspension crystallization and the isolation of isomerically pure crystals, which is characterized in that, prior to the isolation of the crystals, 5 to 40% by weight of the crystals produced are remelted while simultaneously increasing the temperature of the crystal slurry by 4.5 to 9° C.

Abstract translation: 描述了通过悬浮结晶和异构纯晶体的分离从异氰酸酯异构体的混合物中获得纯异氰酸酯异构体的方法，其特征在于，在分离晶体之前，产生5至40重量％的晶体 重熔，同时将结晶浆料的温度同时提高4.5至9℃。

公开(公告)号：US4482750A

公开(公告)日：1984-11-13

申请号：US452178

申请日：1982-12-22

Applicant: Hartmut Hetzel ,  Pramod Gupta ,  Roland Nast ,  Herbert Echterhof ,  Ulrich Brocker

Inventor： Hartmut Hetzel ,  Pramod Gupta ,  Roland Nast ,  Herbert Echterhof ,  Ulrich Brocker

IPC: C08G65/00 ,  C08G18/28 ,  C08G65/02 ,  C08G65/26 ,  C08G65/30 ,  C07C41/34

CPC classification number: C08G65/30 ,  C08G18/28 ,  C08G65/26 ,  C08G65/2609 ,  C08G65/2648

Abstract: A process for removing alkali material from a polyether polyol. From 1-20 wt. % water and 0-30 wt. % inert organic solvent are added to an alkaline polyether polyol. The resultant emulsion is maintained at a temperature of at least 70.degree. C. for a period of at least 30 minutes with little or no stirring to effect separation of the emulsion into an organic and an aqueous phase. The aqueous phase is then separated from the organic phase and the organic phase is treated by known methods to remove residual alkali material.

Abstract translation: 从聚醚多元醇中除去碱性物质的方法。 从1-20重量 ％水和0-30重量％ 将％惰性有机溶剂加入到碱性聚醚多元醇中。 所得乳液在少量或不搅拌下保持在至少70℃的温度下至少30分钟的时间段，以使乳液分离成有机相和水相。 然后将水相与有机相分离，并通过已知方法处理有机相以除去残留的碱性物质。

公开(公告)号：US4147714A

公开(公告)日：1979-04-03

申请号：US905245

申请日：1978-05-12

Applicant: Hartmut Hetzel ,  Klaus Konig ,  Hans G. Schmelzer ,  Kuno Wagner

Inventor： Hartmut Hetzel ,  Klaus Konig ,  Hans G. Schmelzer ,  Kuno Wagner

IPC: C07C273/18 ,  C07C275/62 ,  C08G18/78 ,  C08G18/80 ,  C07C127/24

CPC classification number: C08G18/7831 ,  C07C273/1827 ,  C08G18/8038

Abstract: This invention relates to an improved process for the preparation of polyisocyanates which contain biuret groups by the direct reaction of polyamines in vapor form with polyisocyanates.

Abstract translation: 本发明涉及通过蒸气形式的多胺与多异氰酸酯的直接反应制备多异氰酸酯的改进方法，其包含缩二脲基团。