Catalyst for preparing unsaturated acids and aldehydes
    101.
    发明授权
    Catalyst for preparing unsaturated acids and aldehydes 失效
    用于制备不饱和酸和醛的催化剂

    公开(公告)号:US3664968A

    公开(公告)日:1972-05-23

    申请号:US3664968D

    申请日:1970-08-03

    Inventor: EDEN JAMAL S

    CPC classification number: C07C45/35 C07C47/22

    Abstract: Unsaturated aldehydes and carboxylic acids as acrolein or methacrolein and acrylic acid or methacrylic acid are obtained by the reaction of propylene or isobutylene with oxygen at an elevated temperature in the presence of a catalyst containing a mixture of molybdenum oxide, tellurium oxide and an aluminum phosphate.

    Preparation of polyurethanes using organo-tin catalyst and time-lapse modifier
    103.
    发明授权
    Preparation of polyurethanes using organo-tin catalyst and time-lapse modifier 失效
    使用有机锡催化剂和时间改性剂制备聚氨酯

    公开(公告)号:US3635906A

    公开(公告)日:1972-01-18

    申请号:US3635906D

    申请日:1968-11-12

    Applicant: DU PONT

    CPC classification number: C08G18/089 C08G18/161 Y10S528/905

    Abstract: METHOD OF PREPARING POLYURETHANES BY TIME-LAPSE CATALYSIS WHICH COMPRISES: (A) THROUGHLY MIXING A REACTION MEDIUM CONTAINING: (1) AN ORGRANIC POLYISOCYANATE, (2) ABOUT 3.5-1.5 EQUIVALENT, PER EQUIVALENT OF ORAGANIC POLYISOCYANATE, OR AN ORGANIC POLYHYDROXY COMPOUND, (3) ABOUT 0.0001 TO 0.1 MOLE, PER EQUIVALENT OF ORGANIC POLYISOCYANATE, OF A CURE RATE CATALYST FOR THE POLYUREATHANE REACTION CONSISTING ESSENTIALLY OF AMINE-FREE ORGANO-TINE CURE RATE CATAYLST FOR THE POLYURETHANE REACTION, (4) AT LEAST ABOUT 0.1 MOLE, PER MOLE OF AMINEFREE ORGANO-TIN CATALYST, OF A TIME-LAPSE MODIFIER SELECTED FROM THE GROUP CONSISTING OF (A) B-DICARBONYL COMPOUNDS HAVING AN ENOL CONTENT OF AT LEAST ABOUT 4% AND A DISCATBONYL ANGLE OF NOT GREATER THAN ABOUT 120 DEGREES, (B) A-HYDROXY KETONES, (C) FUSED AROMATIC B-HYDROXY KETONES IN WHICH THE HYDROXYL GROUP IS ATTACHED TO A CARBON BETA TO THE KETO GROUP IN AN ADJACENT RING, AND (D) B-HYDROXY NITROGEN-HETEOCYCLIC FUSED AROMATIC IN WHICH THE HYDROXYL GROUP IS ATTACHED TO A CARBON BETA TO THE NITROGEN IN AN ADJACENT RING, (B) APPLYING THE REACTION MIXTURE, AND (C) ALLOWING THE APPLIED REACTION MIXTURE TO CURE AT AMBIENT TEMPERATURE.

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